5cbdcce633db39767b0e487359e7dceb8b42d5a339c97d0632f3cc7d3708303c

Analysis

max time kernel
94s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-01-2025 22:22

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General

Target

JaffaCakes118_4fe05a056bc132d1ed9c589dac107f03.dll
Size

436KB
MD5

4fe05a056bc132d1ed9c589dac107f03
SHA1

5c19ad279e343b6fc90db2c1634f10d78d89b006
SHA256

5cbdcce633db39767b0e487359e7dceb8b42d5a339c97d0632f3cc7d3708303c
SHA512

5cc4a8aa12c552dc042e3654448badf86c8e44e1a5cb9babb5e424d44191f5f944c4d571ae8e21603f90177e3a46b5be574f8e8acb5c98c5e177ef3a383311c5
SSDEEP

12288:Joz83OtIEzW+/m/AyF7bCrO/EDrzLbDe:mbIEzW+/m/rF7kcKzj

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4556	rundll32Srv.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32Srv.exe	rundll32.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000a000000023c0f-3.dat	upx
behavioral2/memory/4556-5-0x0000000000400000-0x000000000044F000-memory.dmp	upx
behavioral2/memory/4556-8-0x0000000000400000-0x000000000044F000-memory.dmp	upx

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1508	4556	WerFault.exe	83
3700	1284	WerFault.exe	82

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	rundll32Srv.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 1284	5048	rundll32.exe	82
PID 5048 wrote to memory of 1284	5048	rundll32.exe	82
PID 5048 wrote to memory of 1284	5048	rundll32.exe	82
PID 1284 wrote to memory of 4556	1284	rundll32.exe	83
PID 1284 wrote to memory of 4556	1284	rundll32.exe	83
PID 1284 wrote to memory of 4556	1284	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4fe05a056bc132d1ed9c589dac107f03.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5048
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4fe05a056bc132d1ed9c589dac107f03.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1284
- - C:\Windows\SysWOW64\rundll32Srv.exe
    C:\Windows\SysWOW64\rundll32Srv.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4556
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4556 -s 268
      4⤵
      Program crash
      PID:1508
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1284 -s 608
    3⤵
    - Program crash
    PID:3700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 4556 -ip 4556
1⤵
PID:2224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1284 -ip 1284
1⤵
PID:3444

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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\rundll32Srv.exe

Filesize
94KB

MD5
0ade8b6133b3132e08e58d7685978d50

SHA1
858a4d2941ce5a0316ae820203508674e70f7c00

SHA256
c0db177e44639c948f1547b437df118762747c4604e7c95c44717fa827ea3049

SHA512
99cb2252f1e7a905be9642d4a0c6da8d271b063fe2724ca636d2a8399fb779a554871362b7f34d396d3b5b909433ad6f34fe1ffaa54c31fc22c230788c7d2f4e

Download Submit
memory/1284-1-0x000000007C340000-0x000000007C3AE000-memory.dmp

Filesize
440KB

Download
memory/1284-9-0x000000007C340000-0x000000007C3AE000-memory.dmp

Filesize
440KB

Download
memory/4556-6-0x0000000000670000-0x0000000000671000-memory.dmp

Filesize
4KB

Download
memory/4556-5-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/4556-8-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download