931a0c59774c4d64ca55f1fac57170da6a287a0353a4e9f069a45a69c56017e6

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17/08/2024, 12:41

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General

Target

a2920aed2be15663ffcfab0ee8b0f4a1_JaffaCakes118.dll
Size

37KB
MD5

a2920aed2be15663ffcfab0ee8b0f4a1
SHA1

687a4308c4948a467836018e91e6bcd3a89386d6
SHA256

931a0c59774c4d64ca55f1fac57170da6a287a0353a4e9f069a45a69c56017e6
SHA512

c83bf7d4e8a0412e2f773ab4716c691735c5527ae88bd1a79d5ed6306810df9bc68689ee27e449990a7e5bde2b6ed556ab90a471889b8ef6cf24c5bcbbb6d9af
SSDEEP

768:j0Bi5b49hXM/aci8eurEpxqGn1au8YvktXotNft1CcS2hj:j0BiJ4LXM/azOrEpxqG1L8ak6tNfvCcn

Score

7^/10

discovery persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
2940	rundll32.exe
2940	rundll32.exe
4044	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\khfEXrSi.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\khfEXrSi.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\khfEXrSi.dll	rundll32.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{52A96517-3690-45C7-98A9-1DD379F9D9B5}\InprocServer32\ = "C:\\Windows\\SysWow64\\khfEXrSi.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{52A96517-3690-45C7-98A9-1DD379F9D9B5}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{52A96517-3690-45C7-98A9-1DD379F9D9B5}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{52A96517-3690-45C7-98A9-1DD379F9D9B5}\InprocServer32	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2940	rundll32.exe
2940	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe
4044	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2940	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2940	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2940	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 2940	1848	rundll32.exe	84
PID 1848 wrote to memory of 2940	1848	rundll32.exe	84
PID 1848 wrote to memory of 2940	1848	rundll32.exe	84
PID 2940 wrote to memory of 612	2940	rundll32.exe	5
PID 2940 wrote to memory of 4044	2940	rundll32.exe	94
PID 2940 wrote to memory of 4044	2940	rundll32.exe	94
PID 2940 wrote to memory of 4044	2940	rundll32.exe	94

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a2920aed2be15663ffcfab0ee8b0f4a1_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1848
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a2920aed2be15663ffcfab0ee8b0f4a1_JaffaCakes118.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2940
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\khfEXrSi.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:4044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\khfEXrSi.dll

Filesize
37KB

MD5
a2920aed2be15663ffcfab0ee8b0f4a1

SHA1
687a4308c4948a467836018e91e6bcd3a89386d6

SHA256
931a0c59774c4d64ca55f1fac57170da6a287a0353a4e9f069a45a69c56017e6

SHA512
c83bf7d4e8a0412e2f773ab4716c691735c5527ae88bd1a79d5ed6306810df9bc68689ee27e449990a7e5bde2b6ed556ab90a471889b8ef6cf24c5bcbbb6d9af

Download Submit
memory/2940-1-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/2940-0-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/2940-8-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/2940-10-0x0000000001170000-0x0000000001180000-memory.dmp

Filesize
64KB

Download
memory/4044-15-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download
memory/4044-16-0x0000000010000000-0x0000000010010000-memory.dmp

Filesize
64KB

Download