vobfus | aa778f939977b80f87a04747721eabaeae4ab5e09d5eb2178ee650f2c3f96dd6

General

Target

e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe
Size

220KB
MD5

e9f7251adf63ca905ff1423def163df5
SHA1

e2582bd560f0e7461d0c43b3b305f0365d7761e6
SHA256

aa778f939977b80f87a04747721eabaeae4ab5e09d5eb2178ee650f2c3f96dd6
SHA512

ee18284b5cba717cd57173f03381a4ed3d4c416375370d9c7415fcaa0c63396de4c7999c516a1dfd5ba69e7511898163273a73d6a8818eb10ae854557d69ab81
SSDEEP

1536:c3bsEIbdCdWMGEd/OUD4k3oAm0uKBBi58YpcJ/NsnXUIL6UwGug7LB7hrqH84Jao:Lby2GXFfYEWnEY6URBV/4O+L9VVpWvQ

Score

10^/10

vobfus persistence upx worm

Malware Config

Signatures

Vobfus
A widespread worm which spreads via network drives and removable media.
worm vobfus

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\DL4Q62754SIZM = "C:\\Users\\Admin\\AppData\\Roaming\\91KNX65EG.exe"	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe
Key created	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\DL4Q62754SIZM = "C:\\Users\\Admin\\AppData\\Roaming\\91KNX65EG.exe"	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2244-4-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/2244-6-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/2244-10-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/2244-12-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/2244-13-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/2244-14-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/2244-19-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/2244-34-0x0000000000400000-0x0000000000427000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 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\DL4Q62754SIZM = "C:\\Users\\Admin\\AppData\\Roaming\\91KNX65EG.exe"	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\DL4Q62754SIZM = "C:\\Users\\Admin\\AppData\\Roaming\\91KNX65EG.exe"	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1136 set thread context of 2244	1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe	28

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	6	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2244	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe
2244	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1136 wrote to memory of 2244	1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe	28
PID 1136 wrote to memory of 2244	1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe	28
PID 1136 wrote to memory of 2244	1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe	28
PID 1136 wrote to memory of 2244	1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe	28
PID 1136 wrote to memory of 2244	1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe	28
PID 1136 wrote to memory of 2244	1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe	28
PID 1136 wrote to memory of 2244	1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe	28
PID 1136 wrote to memory of 2244	1136	e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe	28

C:\Users\Admin\AppData\Local\Temp\e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1136
- C:\Users\Admin\AppData\Local\Temp\e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\e9f7251adf63ca905ff1423def163df5_JaffaCakes118.exe
  2⤵
  - Adds policy Run key to start application
  - Adds Run key to start application
  - Suspicious behavior: RenamesItself
  - Suspicious use of SetWindowsHookEx
  PID:2244

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\91knx65eg.exe.jpg

Filesize
220KB

MD5
e9f7251adf63ca905ff1423def163df5

SHA1
e2582bd560f0e7461d0c43b3b305f0365d7761e6

SHA256
aa778f939977b80f87a04747721eabaeae4ab5e09d5eb2178ee650f2c3f96dd6

SHA512
ee18284b5cba717cd57173f03381a4ed3d4c416375370d9c7415fcaa0c63396de4c7999c516a1dfd5ba69e7511898163273a73d6a8818eb10ae854557d69ab81

Download Submit
memory/2244-2-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2244-4-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2244-6-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2244-8-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2244-10-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2244-12-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2244-13-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2244-14-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2244-19-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2244-34-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads