2b57d211d64c938f3689a7c4347ce3a9ac2fc89c6514f31c7d2e1d9287e3bf84

Analysis

max time kernel
150s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21/08/2024, 06:39

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General

Target

b27240353196ccdf49b5244f5e61e1b3_JaffaCakes118.dll
Size

43KB
MD5

b27240353196ccdf49b5244f5e61e1b3
SHA1

8753c8049a0612862696d3125dd1bf8f0d82e9e7
SHA256

2b57d211d64c938f3689a7c4347ce3a9ac2fc89c6514f31c7d2e1d9287e3bf84
SHA512

d09c69cde00a0eec1c819317899bb44080672624c1716de092772b4d529c4b9337be8db8633215118d9093443d6016f3b61a47b32362e9a98ce9b04bce5400a5
SSDEEP

768:TLyQIaMxh9WQ3jzaoEZ8nPLBsN/Xxc4XvvDDBWUtgC/+jT5rTLaI8MwJ7N346:nyQLgWQ3ioEZK1sfhXvvD0+gjtXLacoh

Score

7^/10

discovery persistence upx

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
4384	rundll32.exe
4384	rundll32.exe
4056	rundll32.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4384-2-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4384-1-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4384-5-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4384-15-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4384-14-0x00000000028B0000-0x00000000028C4000-memory.dmp	upx
behavioral2/memory/4056-27-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4056-28-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/4056-29-0x0000000010000000-0x0000000010014000-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\\wvUlmlJy.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\wvUlmlJy.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\wvUlmlJy.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
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{B62B5CE6-A4BF-428D-8A21-47EE1BD90EAC}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{B62B5CE6-A4BF-428D-8A21-47EE1BD90EAC}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{B62B5CE6-A4BF-428D-8A21-47EE1BD90EAC}\InprocServer32\ = "C:\\Windows\\SysWow64\\wvUlmlJy.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{B62B5CE6-A4BF-428D-8A21-47EE1BD90EAC}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4384	rundll32.exe
4384	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe
4056	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4384	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4384	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4384	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 4384	2292	rundll32.exe	84
PID 2292 wrote to memory of 4384	2292	rundll32.exe	84
PID 2292 wrote to memory of 4384	2292	rundll32.exe	84
PID 4384 wrote to memory of 616	4384	rundll32.exe	5
PID 4384 wrote to memory of 4056	4384	rundll32.exe	96
PID 4384 wrote to memory of 4056	4384	rundll32.exe	96
PID 4384 wrote to memory of 4056	4384	rundll32.exe	96

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:616

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\b27240353196ccdf49b5244f5e61e1b3_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\b27240353196ccdf49b5244f5e61e1b3_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:4384
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\wvUlmlJy.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:4056

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\wvUlmlJy.dll

Filesize
43KB

MD5
b27240353196ccdf49b5244f5e61e1b3

SHA1
8753c8049a0612862696d3125dd1bf8f0d82e9e7

SHA256
2b57d211d64c938f3689a7c4347ce3a9ac2fc89c6514f31c7d2e1d9287e3bf84

SHA512
d09c69cde00a0eec1c819317899bb44080672624c1716de092772b4d529c4b9337be8db8633215118d9093443d6016f3b61a47b32362e9a98ce9b04bce5400a5

Download Submit
memory/4056-29-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4056-28-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4056-27-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4056-24-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4056-23-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4384-1-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4384-15-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4384-14-0x00000000028B0000-0x00000000028C4000-memory.dmp

Filesize
80KB

Download
memory/4384-16-0x000000001000E000-0x0000000010013000-memory.dmp

Filesize
20KB

Download
memory/4384-5-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4384-4-0x000000001000E000-0x0000000010013000-memory.dmp

Filesize
20KB

Download
memory/4384-0-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/4384-3-0x0000000000AE0000-0x0000000000AE9000-memory.dmp

Filesize
36KB

Download
memory/4384-2-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download