921c8f9b01c60621515a40817147270c696d7730a7b0e2ef44340d7f9825909a

Analysis

max time kernel
150s
max time network
124s
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 10:11

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General

Target

a223a28b15c1fe9f51c65b8584d5a7fb_JaffaCakes118.dll
Size

38KB
MD5

a223a28b15c1fe9f51c65b8584d5a7fb
SHA1

6a3c5d68d69d81a34515e6cb2d8ad5f3ba25423b
SHA256

921c8f9b01c60621515a40817147270c696d7730a7b0e2ef44340d7f9825909a
SHA512

0dffe056506703c3e4c77fd43015db5015b79beb2f850b1b92d4566e82cc13cb4cfd37f9495b56b0a033fc78a627619cb649528345897005e51c71b5c75b1c82
SSDEEP

768:cYh6hu6kXxiU/DCu1GQq59zuYfdguCzM88d+3nwISUhDzpfW2HayC:ccVh0U/Di59zuYB6g696yC

Score

7^/10

discovery persistence upx

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
1260	rundll32.exe
1260	rundll32.exe
4540	rundll32.exe

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1260-2-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1260-3-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1260-5-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1260-12-0x0000000000FB0000-0x0000000000FC4000-memory.dmp	upx
behavioral2/memory/1260-17-0x0000000000FB0000-0x0000000000FC4000-memory.dmp	upx
behavioral2/memory/4540-24-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4540-25-0x0000000010000000-0x0000000010014000-memory.dmp	upx

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\\wvUnOIYO.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\wvUnOIYO.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\wvUnOIYO.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\{474C31C5-578B-4192-8562-2E474578DC27}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{474C31C5-578B-4192-8562-2E474578DC27}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{474C31C5-578B-4192-8562-2E474578DC27}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{474C31C5-578B-4192-8562-2E474578DC27}\InprocServer32\ = "C:\\Windows\\SysWow64\\wvUnOIYO.dll"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1260	rundll32.exe
1260	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe
4540	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1260	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1260	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1260	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3364 wrote to memory of 1260	3364	rundll32.exe	83
PID 3364 wrote to memory of 1260	3364	rundll32.exe	83
PID 3364 wrote to memory of 1260	3364	rundll32.exe	83
PID 1260 wrote to memory of 612	1260	rundll32.exe	5
PID 1260 wrote to memory of 4540	1260	rundll32.exe	96
PID 1260 wrote to memory of 4540	1260	rundll32.exe	96
PID 1260 wrote to memory of 4540	1260	rundll32.exe	96

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

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\a223a28b15c1fe9f51c65b8584d5a7fb_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3364
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\a223a28b15c1fe9f51c65b8584d5a7fb_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:1260
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\wvUnOIYO.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:4540

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

Replay Monitor

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Downloads

C:\Windows\SysWOW64\wvUnOIYO.dll

Filesize
38KB

MD5
a223a28b15c1fe9f51c65b8584d5a7fb

SHA1
6a3c5d68d69d81a34515e6cb2d8ad5f3ba25423b

SHA256
921c8f9b01c60621515a40817147270c696d7730a7b0e2ef44340d7f9825909a

SHA512
0dffe056506703c3e4c77fd43015db5015b79beb2f850b1b92d4566e82cc13cb4cfd37f9495b56b0a033fc78a627619cb649528345897005e51c71b5c75b1c82

Download Submit
memory/1260-0-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1260-1-0x0000000000BE0000-0x0000000000BE8000-memory.dmp

Filesize
32KB

Download
memory/1260-2-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1260-3-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1260-5-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1260-4-0x000000001000E000-0x0000000010013000-memory.dmp

Filesize
20KB

Download
memory/1260-12-0x0000000000FB0000-0x0000000000FC4000-memory.dmp

Filesize
80KB

Download
memory/1260-15-0x0000000000BE0000-0x0000000000BE8000-memory.dmp

Filesize
32KB

Download
memory/1260-17-0x0000000000FB0000-0x0000000000FC4000-memory.dmp

Filesize
80KB

Download
memory/4540-24-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4540-25-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download