1bfbf22917c46665f6f949e58ebf34e013c2a400b50cab35c57825873a26c7b3

General

Target
01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe
Size 299KB
Sample240620-cqcrfstblf
SHA256 1bfbf22917c46665f6f949e58ebf34e013c2a400b50cab35c57825873a26c7b3
MD5 01f9f4da048dcd54e0688d34e481e65f
SHA1 5f3bd9efba6ad2e1e2febf2d9d544a44e4712a1b
SHA512 3ed221381da1d0807bb693941e2a113b4f1f92726f5eccf2282ca360f99769dd4f0c77bac4a2922ff712edc51baaca8862891d8d2a224aa0bba862e3a77c23c4
SSDEEP 6144:VyFiQSY/vJsu5ruiIxniF9kSnV8oWkf3CMMkydGgKKpN1LlS9B:VA3eUrmJHw9f3CMf+GipN1l4B
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

adware stealer

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe

Executes dropped EXE 1 IoCs

pid	Process
1140	SkypeClient.exe

Loads dropped DLL 1 IoCs

pid	Process
4356	Regsvr32.exe

Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}	Regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}\	Regsvr32.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\resiifers.ini	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\kfkdmqracmstn.dll	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe
File created	C:\Windows\SysWOW64\SkypeClient.exe	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 11 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}	Regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}\	Regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}\InprocServer32\ThreadingModel = "Apartment"	Regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\kfkdmqracmstn.TIEBHOCom\Clsid	Regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\kfkdmqracmstn.TIEBHOCom\Clsid\ = "{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}"	Regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}\ProgID	Regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}\InprocServer32	Regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}\InprocServer32\ = "C:\\Windows\\SysWow64\\kfkdmqracmstn.dll"	Regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\kfkdmqracmstn.TIEBHOCom	Regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\kfkdmqracmstn.TIEBHOCom\	Regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4D2EAF15-81D0-42DA-8C39-19EDD39E0FB3}\ProgID\ = "kfkdmqracmstn.TIEBHOCom"	Regsvr32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1140	SkypeClient.exe
1140	SkypeClient.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3784 wrote to memory of 4356	3784	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe	82
PID 3784 wrote to memory of 4356	3784	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe	82
PID 3784 wrote to memory of 4356	3784	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe	82
PID 3784 wrote to memory of 1140	3784	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe	84
PID 3784 wrote to memory of 1140	3784	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe	84
PID 3784 wrote to memory of 1140	3784	01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe	84

C:\Users\Admin\AppData\Local\Temp\01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\01f9f4da048dcd54e0688d34e481e65f_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3784
- C:\Windows\SysWOW64\Regsvr32.exe
  Regsvr32.exe /s C:\Windows\system32\kfkdmqracmstn.dll
  2⤵
  - Loads dropped DLL
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:4356
- C:\Windows\SysWOW64\SkypeClient.exe
  "C:\Windows\system32\SkypeClient.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:1140

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

1

T1176

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

SkypeClient.exe

Path C:\Windows\SysWOW64\SkypeClient.exe
Size 57KB
SHA256 789fc7ffcd1deb1a144dd2caaa4bb75e2a6aa90c0217dbb747b2a699de6a94b3
MD5 83c4b837fe3214c06549d8d6c41ee83e
SHA1 2b6eb1b3a91f1935d59621993231658c0c5b551e
SHA512 ece8ebed1f0bb25fe3e72c395b21ad97f78f39ebe5f41365dbd7bc225ece1bf85754aabc3ba7329bb983fa15ecd6e8a80d2bd7b8d640df5c42336beaa7845d3e
SSDEEP 768:BTENGVSVpwwgYyuccX0cVoXH4Y4A4vr1HwpWOyYUgnD5PVsXY8dthJV801:VQpKwg5uGYY4A4vr0UgD5OXY8vbVb
MD5 SHA1 SHA512 SSDEEP

Submit Download

kfkdmqracmstn.dll

Path C:\Windows\SysWOW64\kfkdmqracmstn.dll
Size 218KB
SHA256 9876168fd5d21feed33002892c57d0a9a5649f29ecdedc2c7dfe6c51796418ed
MD5 7c87ed38de36a9d3217bdcbe4cbdb3f5
SHA1 ab6c4ad567244b0b8bcd180cfb2917b242704a3f
SHA512 0f618fb2877b1fb219fc4264df9a92bf1174eb6f9a3026ab8f25de128fe422ba120084fd2a0b7e63a5170887d2b280df9fa5e701b011edd6d37290694daa14e3
SSDEEP 6144:5TVtI5gi9bqw93owwRXMlWxrrGa3QlbHEu7uj7x25bQ2:1Vt9ilqw93BqMlYX3QlbHJ7Cdb
MD5 SHA1 SHA512 SSDEEP

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resiifers.ini

Path C:\Windows\SysWOW64\resiifers.ini
Size 83B
SHA256 5804ffd4c8b077bdf63ccddaa2a91dec460494ac04a0df74cb360ad2b6b25e67
MD5 1d6bd2c9ae7b8a19abbf55636842c399
SHA1 ffb16e9723649056a7195fdb3668ee38789f6d83
SHA512 6f94f055da720ffff2a5ff2d77392d6a8819139142221ee764dd4783331d108b380ca1824bfb5715ab11c6eb41ec3bde0c82956146d01fcb35f9c17ce73b335a
MD5 SHA1 SHA512

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memory/3784-0-0x0000000000400000-0x00000000004A3000-memory.dmp

Download

memory/3784-1-0x0000000000600000-0x0000000000602000-memory.dmp

Download

memory/3784-22-0x0000000000400000-0x00000000004A3000-memory.dmp

Download

memory/4356-10-0x0000000000400000-0x000000000049D000-memory.dmp

Download

memory/4356-11-0x00000000009E0000-0x00000000009E2000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads