4066fcf253fc1f2c111aabb50eab5f1b32be288357b00a3631c4f925e00c29ec

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
01-08-2024 21:28

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General

Target

81c952132ded9a80ecc48c1cffe932e0_JaffaCakes118.dll
Size

236KB
MD5

81c952132ded9a80ecc48c1cffe932e0
SHA1

b8cb8b0ce8acd5d81318be89967540f424c0b0c2
SHA256

4066fcf253fc1f2c111aabb50eab5f1b32be288357b00a3631c4f925e00c29ec
SHA512

21c37fd054a8c8607c11ef6acc102083ab6e5191044640d267c7348486822fb9c1a1da21986d4bff19e6b5005456cb433e3fc3166f861829d8336386052face8
SSDEEP

3072:3F24fliN+7XlmZKxbLYH1rhAwHL5K2W5QVgxwkFJ:3F24flic7X8ZibLYHFhAkKZYgnJ

Score

10^/10

discovery persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\weqfnux = "{4427b016-ccaf-11f4-ddb0-ccaf389ea4dd}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2708	rundll32.exe

Drops file in System32 directory 4 IoCs

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

System Location Discovery: System Language Discovery 1 TTPs 1 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

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4427b016-ccaf-11f4-ddb0-ccaf389ea4dd}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4427b016-ccaf-11f4-ddb0-ccaf389ea4dd}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4427b016-ccaf-11f4-ddb0-ccaf389ea4dd}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4427b016-ccaf-11f4-ddb0-ccaf389ea4dd}\InprocServer32\ = "C:\\Windows\\SysWow64\\rzlaips.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4427b016-ccaf-11f4-ddb0-ccaf389ea4dd}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2708	rundll32.exe
2708	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2708	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2708	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 2708	1792	rundll32.exe	31
PID 1792 wrote to memory of 2708	1792	rundll32.exe	31
PID 1792 wrote to memory of 2708	1792	rundll32.exe	31
PID 1792 wrote to memory of 2708	1792	rundll32.exe	31
PID 1792 wrote to memory of 2708	1792	rundll32.exe	31
PID 1792 wrote to memory of 2708	1792	rundll32.exe	31
PID 1792 wrote to memory of 2708	1792	rundll32.exe	31

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\81c952132ded9a80ecc48c1cffe932e0_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1792
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\81c952132ded9a80ecc48c1cffe932e0_JaffaCakes118.dll,#1
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Loads dropped DLL
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2708

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

\Windows\SysWOW64\jrdsahk.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/2708-0-0x00000000002E0000-0x0000000000324000-memory.dmp

Filesize
272KB

Download
memory/2708-1-0x00000000002E1000-0x00000000002E8000-memory.dmp

Filesize
28KB

Download
memory/2708-9-0x00000000002E0000-0x0000000000324000-memory.dmp

Filesize
272KB

Download
memory/2708-10-0x00000000002E0000-0x0000000000324000-memory.dmp

Filesize
272KB

Download