f326c53f26ba6a5cc5168e89fcc32dc4ce9a1fa907d9921db1a69e7d342f7c4b

Analysis

max time kernel
151s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2024, 12:25

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General

Target
e9fb971f4f141b632f22ceb23903398e_JaffaCakes118.dll
Size 521KB
Sample240409-plsy4aab4z
SHA256 f326c53f26ba6a5cc5168e89fcc32dc4ce9a1fa907d9921db1a69e7d342f7c4b
MD5 e9fb971f4f141b632f22ceb23903398e
SHA1 3162651c539c1a0523c08cefa31618bc2a2e43a8
SHA512 f36d553e851a584382567e24b0a9a1cfc4561158e3f4005a1afbc0da999d6f2fbd0535bb8b3409a93dbfdc8b39527d782375fc891cd48ea9836ff5aebc8716f0
SSDEEP 384:RKFNjtU2enrfzCBgCC8Q0Tjj6vct9a7p1B3z+V4kht0W:oFifBeQ0XOs9a7zR+V4k
MD5 SHA1 SHA512 SSDEEP

Score

6^/10

adware stealer

Malware Config

Signatures

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\{87FD640A-158F-48AC-FD14-1597F14A9778}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{87FD640A-158F-48AC-FD14-1597F14A9778}\ = "mndshsrv.dll"	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\verclsid.exe	rundll32.exe

Modifies registry class 6 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{87FD640A-158F-48AC-FD14-1597F14A9778}\InprocServer32	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{87FD640A-158F-48AC-FD14-1597F14A9778}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{87FD640A-158F-48AC-FD14-1597F14A9778}\InprocServer32\ = "C:\\Windows\\SysWow64\\mndshsrv.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{87FD640A-158F-48AC-FD14-1597F14A9778}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
496	rundll32.exe
496	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	496	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4476 wrote to memory of 496	4476	rundll32.exe	93
PID 4476 wrote to memory of 496	4476	rundll32.exe	93
PID 4476 wrote to memory of 496	4476	rundll32.exe	93
PID 496 wrote to memory of 4916	496	rundll32.exe	97
PID 496 wrote to memory of 4916	496	rundll32.exe	97
PID 496 wrote to memory of 4916	496	rundll32.exe	97

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9fb971f4f141b632f22ceb23903398e_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4476
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9fb971f4f141b632f22ceb23903398e_JaffaCakes118.dll,#1
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:496
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240650859.bat
    3⤵
    PID:4916

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3792 --field-trial-handle=2356,i,13261194862334667799,7441241219475888176,262144 --variations-seed-version /prefetch:8
1⤵
PID:2420

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

~DFD240650859.bat

Path C:\Users\Admin\AppData\Local\Temp\~DFD240650859.bat
Size 121B
SHA256 6cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238
MD5 09517fc62284f33e877a276463580bd1
SHA1 0b14fe1db4493818f9de0bf2a56ee5370b8d479a
SHA512 1b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d
MD5 SHA1 SHA512

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