fffc868ce833c047c1ed2b36e7f59a946e7bfb54a6914a5a2580a0a8b48ebb0f

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
15-07-2024 18:22

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General

Target

4adbd1568cc6677490c52745e61ed26e_JaffaCakes118.dll
Size

36KB
MD5

4adbd1568cc6677490c52745e61ed26e
SHA1

0da9455cd1862eb1dc902dc8a9d1aa7541053bd6
SHA256

fffc868ce833c047c1ed2b36e7f59a946e7bfb54a6914a5a2580a0a8b48ebb0f
SHA512

d4555138e394252ee094856638758668d3df7ad2cc09a8466d77e4a4d66b76b97436a4fb073daf3729da42771bf1dea2e3a7473dd23afe6a925e1de0cace8e07
SSDEEP

768:1TKSc4sjrTlzdqGPQUgH+SgEU4Zqe6s1zCNdN:18V9RttgH+yoe6K2vN

Score

7^/10

persistence upx

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
1748	rundll32.exe
1748	rundll32.exe
5048	rundll32.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1748-0-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1748-2-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1748-1-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1748-5-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/1748-14-0x0000000002680000-0x0000000002694000-memory.dmp	upx
behavioral2/memory/1748-15-0x0000000002680000-0x0000000002694000-memory.dmp	upx
behavioral2/memory/1748-17-0x0000000002680000-0x0000000002694000-memory.dmp	upx
behavioral2/memory/5048-26-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/5048-25-0x0000000010000000-0x0000000010014000-memory.dmp	upx
behavioral2/memory/5048-27-0x0000000010000000-0x0000000010014000-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\\efcBsSjk.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BB81FE02-F70B-46C2-82C3-DE5C6652E677}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BB81FE02-F70B-46C2-82C3-DE5C6652E677}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BB81FE02-F70B-46C2-82C3-DE5C6652E677}\InprocServer32\ = "C:\\Windows\\SysWow64\\efcBsSjk.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{BB81FE02-F70B-46C2-82C3-DE5C6652E677}\InprocServer32\ThreadingModel = "Both"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1748	rundll32.exe
1748	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe
5048	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1748	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1748	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1748	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3632 wrote to memory of 1748	3632	rundll32.exe	83
PID 3632 wrote to memory of 1748	3632	rundll32.exe	83
PID 3632 wrote to memory of 1748	3632	rundll32.exe	83
PID 1748 wrote to memory of 612	1748	rundll32.exe	5
PID 1748 wrote to memory of 5048	1748	rundll32.exe	89
PID 1748 wrote to memory of 5048	1748	rundll32.exe	89
PID 1748 wrote to memory of 5048	1748	rundll32.exe	89

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

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4adbd1568cc6677490c52745e61ed26e_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3632
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\4adbd1568cc6677490c52745e61ed26e_JaffaCakes118.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1748
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\efcBsSjk.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:5048

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\efcBsSjk.dll

Filesize
36KB

MD5
4adbd1568cc6677490c52745e61ed26e

SHA1
0da9455cd1862eb1dc902dc8a9d1aa7541053bd6

SHA256
fffc868ce833c047c1ed2b36e7f59a946e7bfb54a6914a5a2580a0a8b48ebb0f

SHA512
d4555138e394252ee094856638758668d3df7ad2cc09a8466d77e4a4d66b76b97436a4fb073daf3729da42771bf1dea2e3a7473dd23afe6a925e1de0cace8e07

Download Submit
memory/1748-1-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1748-2-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1748-0-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1748-5-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/1748-4-0x000000001000E000-0x0000000010013000-memory.dmp

Filesize
20KB

Download
memory/1748-3-0x00000000008D0000-0x00000000008D7000-memory.dmp

Filesize
28KB

Download
memory/1748-14-0x0000000002680000-0x0000000002694000-memory.dmp

Filesize
80KB

Download
memory/1748-15-0x0000000002680000-0x0000000002694000-memory.dmp

Filesize
80KB

Download
memory/1748-17-0x0000000002680000-0x0000000002694000-memory.dmp

Filesize
80KB

Download
memory/5048-22-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/5048-26-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/5048-25-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download
memory/5048-27-0x0000000010000000-0x0000000010014000-memory.dmp

Filesize
80KB

Download