ZeroHour
Kaspersky Securelistpublished ()ingested @Securelist

Project TajMahal – a sophisticated new APT framework

highMalwareimportance 42

Indicators of compromiseAll →

TypeIndicatorContext
domainrahasn.webhop.org@kaspersky.com Domains and IPs 104.200.30.125 50.56.240.153 rahasn.webhop.org rahasn.akamake.net rahasn.homewealth.biz File Hashes 22d142
ipv4104.200.30.125ervice – contact [email protected] Domains and IPs 104.200.30.125 50.56.240.153 rahasn.webhop.org rahasn.akamake.net rahasn.h
ipv450.56.240.153t [email protected] Domains and IPs 104.200.30.125 50.56.240.153 rahasn.webhop.org rahasn.akamake.net rahasn.homewealth.biz
md504078ef95a70a04e95bda06cc7bec3fa8e0bffa9cc085e7b662d0d5412 3ffd2915d285ad748202469d4a04e1f5 04078ef95a70a04e95bda06cc7bec3fa 235d427f94630575a4ea4bff180ecf5d 8035a8a143765551ca7db4bc5e
md5061089d8cb0ca58e660ce2e433a689b37b4a14a4be1bd84df6553aaf56 b9c208ea8115232bfd9ec2c62f32d6b8 061089d8cb0ca58e660ce2e433a689b3 0e9afd3a870906ebf34a0b66d8b07435 9c115e9a81d25f9d88e7aaa431
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md50969b2b399a8d4cd2d751824d0d842b4b07d9c453650dd7f683b02b3ed 3a771efb7ba2cd0df247ab570e1408b2 0969b2b399a8d4cd2d751824d0d842b4 fc53f2cd780cd3a01a4299b8445f8511 4e39620afca6f60bb30e031ddc
md50ac48cfa2ff8351365e99c1d26e082ad0c9cf1696a2f4689b2007a12c7 81229c1e272218eeda14892fa8425883 0ac48cfa2ff8351365e99c1d26e082ad Appendix II – Additional technical details The following ta
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md522d142f11cf2a30ea4953e1fffb0fa7eop.org rahasn.akamake.net rahasn.homewealth.biz File Hashes 22d142f11cf2a30ea4953e1fffb0fa7e 2317d65da4639f4246de200650a70753 27612cb03c89158225ca201721
md52317d65da4639f4246de200650a70753homewealth.biz File Hashes 22d142f11cf2a30ea4953e1fffb0fa7e 2317d65da4639f4246de200650a70753 27612cb03c89158225ca201721ea1aad 412956675fbc3f8c51f438c1ab
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Full article1,412 words · extracted from securelist.com · click to collapse

10 Apr 2019

minute read

Executive summary

‘TajMahal’ is a previously unknown and technically sophisticated APT framework discovered by Kaspersky Lab in the autumn of 2018. This full-blown spying framework consists of two packages named ‘Tokyo’ and ‘Yokohama’. It includes backdoors, loaders, orchestrators, C2 communicators, audio recorders, keyloggers, screen and webcam grabbers, documents and cryptography key stealers, and even its own file indexer for the victim’s machine. We discovered up to 80 malicious modules stored in its encrypted Virtual File System, one of the highest numbers of plugins we’ve ever seen for an APT toolset.

Just to highlight its capabilities, TajMahal is able to steal data from a CD burnt by a victim as well as from the printer queue. It can also request to steal a particular file from a previously seen USB stick; next time the USB is connected to the computer, the file will be stolen.

TajMahal has been developed and used for at least the past five years. The first known ‘legit’ sample timestamp is from August 2013, and the last one is from April 2018. The first confirmed date when TajMahal samples were seen on a victim’s machine is August 2014.

More details about TajMahal are available to customers of the Kaspersky Intelligence Reporting service (contact [email protected]).

Technical details

We have discovered two different types of TajMahal packages, self-named Tokyo and Yokohama. The targeted systems found by Kaspersky Lab were infected with both packages. This suggests that Tokyo was used as first stage infection, deploying the fully-functional Yokohama package on interesting victims, and then left in for backup purposes. The packages share the same code base, we identified the following interesting features:

  • Capable of stealing documents sent to the printer queue.
  • Data gathered for victim recon includes the backup list for Apple mobile devices.
  • Takes screenshots when recording VoiceIP app audio.
  • Steals written CD images.
  • Capable of stealing files previously seen on removable drives once they are available again.
  • Steals Internet Explorer, Netscape Navigator, FireFox and RealNetworks cookies.
  • If deleted from Frontend file or related registry values, it will reappear after reboot with a new name and startup type.

Victims

So far we have detected a single victim based on our telemetry – a diplomatic entity from a country in Central Asia.

Conclusion

The TajMahal framework is an intriguing discovery that’s of great interest, not least for its high level of technical sophistication, which is beyond any doubt. The huge amount of plugins that implement a number of features is something we have never before seen in any other APT activity. For example, it has its own indexer, emergency C2s, is capable of stealing specific files from external drives when they become available again, etc.

The question is, why go to all that trouble for just one victim? A likely hypothesis is that there are other victims we haven’t found yet. This theory is reinforced by the fact that we couldn’t see how one of the files in the VFS was used by the malware, opening the door to the possibility of additional versions of the malware that have yet to be detected.

Kaspersky Lab products detect the TajMahal APT samples as HEUR:Trojan.Multi.Chaperone.gen

Appendix I – Indicators of compromise

A full set of IOCs and Yara rules is available to customers of Kaspersky Intelligence Reporting service – contact [email protected]

Domains and IPs
104.200.30.125
50.56.240.153
rahasn.webhop.org
rahasn.akamake.net
rahasn.homewealth.biz

File Hashes
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Appendix II – Additional technical details

The following table provides the full list of files stored in the VFS with a short description describing what the plugins do:

nn Name Short description
00
01
cs64.dll
cs32.dll
C2 communication and command processing. WatchPoints document stealer.
02
03
li64.dll
li32.dll
LocalInfo. Collects a large amount of information, titled “TAJ MAHAL”
04
06
ad64.dll
ad32.dll
AudioRecorder. Microphone, Voice IP applications.
07
08
le64.dll
le32.dll
Open source-based LAME mp3 encoder (“Mar 27 2014”) used by AudioRecorder plugins (adXX.dll).
09 dd.m MP3 file is sent by AudioRecorder (adXX.dll) when cache is cleared.
10
11
me64.dll
me32.dll
AudioRecorder for Windows Metro applications.
Injects ma32.dll into “wwahost.exe” or “audacity.exe”.
12 ma32.dll AudioRecorder for Windows COM.
Hooks IAudioClient, IAudioRenderClient, IMMDevice.
13
14
ams_api64.dll
ams_api32.dll
Handy wrapper around API of exXX.dll, pdXX.dll, sgXX.dll.
15
16
ex64.dll
ex32.dll
Orchestrator. Update/install/uninstall, selects target processes and loads plugins.
17
18
fe64.dll
fe32.dll
Template of “Yokohama” Frontend module; is used for reinstalling.
19
20
pd64.dll
pd32.dll
Provides API to access configuration settings, working files, egress queue.
21
22
libpng64.dll
libpng32.dll
Open source “libpng” library version 1.5.8 (February 1, 2012). Used by Screenshoter plugin (ssXX.dll).
23
24
rs64.dll
rs32.dll
Reinstaller/Injector.
25
26
ix32.dll
ix64.dll
LoadLibrary call template dll is used by Reinstaller/Injector plugin (rsXX.dll) for injecting LoadLibrary call into running processes.
05
27
28
obj32.bin
obj32.bin
obj64.bin
Shellcode template is used by Reinstaller/Injector (rsXX.dll) and AudioRecorder4MetroApp (meXX.dll) for injecting into running processes. Both versions of “obj32.bin” are the same; it seems to be stored twice by mistake.
29
30
sc64.dll
sc32.dll
Utility library. Provides API for cryptography, file, registry, memory management operations and so on.
31
32
sg64.dll
sg32.dll
Library for managing egress queue (files and messages prepared to send to CC).
33
34
st64.dll
st32.dll
SuicideWatcher. Watches uninstall time, checks time diff (local time vs internet time).
35
36
zip64.dll
zip32.dll
Open source “XZip/XUnzip” library by Info-Zip + Lucian Wischik + Hans Dietrich. Is used by Indexer (inXX.dll) and C2 communication (csXX.dll) plugins.
37
38
zlib64.dll
zlib32.dll
Open source “zlib” version 1.2.3 used by libpngXX.dll for compressing screenshots (ssXX.dll).
39 il32.dll IM-Stealer. Steals conversation content from chat windows of instant messaging applications.
40
55
in32.dll
in64.dll
Indexer. Indexes files on victim drives, user profiles, removable drives.
Built index files are zipped (by zipXX.dll) and put in send queue.
41
42
43
44
46
47
48
49
50
51
52
53
56
isys9core_64.dll
isyspdf6_64.dll
isyspdfl_64.dll
isysdc_64.dll
isys9.key
isys.cwd
isys.elx
isys9_32.dll
isys9core_32.dll
isyspdf6_32.dll
isyspdfl_32.dll
isysdc_32.dll
isys9_64.dll
Proprietary “ISYS Search Software” components are used by Indexer plugin.
Licensee_ID1 “Q5GXU H5W67 23B4W SCQFD 4G7HV 9GSLW”
Licensee_ID2 “objectviewer.exe”
45
54
sqlite3_64.dll
sqlite3_32.dll
Open source “sqlite” library. Used by “ISYS Search”.
57
58
tn32.dll
tn64.dll
Thumbnailer. Makes and prepares to send thumbnails of found picture files.
59
60
61
62
freeimage_32.dll
freeimageplus_32.dll
freeimage_64.dll
freeimageplus_64.dll
FreeImage open source library supports popular graphics image formats (ver 3.15.4 2012-10-27) (http://freeimage.sourceforge.net). Is used by Thumbnailer (tnXX.dll) plugin.
63
64
ku64.dll
ku32.dll
Keylogger & clipboard monitor.
65
66
pm64.dll
pm32.dll
Steals printed documents from spooler queue.
This is done by enabling the “KeepPrintedJobs” attribute for each configured printer stored in Windows Registry:
key: “SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers”
value: “Attributes”
67
68
rc64.dll
rc32.dll
EgressSender. Sends files from output queue to C2.
69
70
rn64.dll
rn32.dll
Daily “ClientRecon” (ComputerName, OS information, MacAddress, WirelessNetwork keys, connected Apple devices, Apple mobile devices backups list, IE version, SecurityCenterInfo (AV, Firewalls and AntiSpyware products), Hardware info, Installed soft including Metro Apps, Users, Autoruns).
Check and send to C2 if something changed.
71
72
ss64.dll
ss32.dll
Screenshoter. Periodic low resolution screenshots. High resolution screenshots of specified process windows and when recording VoiceIP application audio. See “ss_pr” & “ss_wt_nm” cfg vars.
73
74
vm32.dll
vm64.dll
Steal documents from fixed and removable drives. Watch CDBurnArea and steals written CD images.
75
76
wc64.dll
wc32.dll
Periodically makes webcamera snapshots.
77 default.cfg Default configuration settings file.
78 runin.bin List of processes names and associated plugins should be run inside these processes.
79 morph.dat Configuration file stores path of work folders and registry keys.
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Text extracted automatically; images, tables and formatting may be missing. Original: https://securelist.com/project-tajmahal/90240/