vobfus | b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f

General

Target

b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
Size

1.9MB
MD5

b78a1cc4f8fab910a60f2b45b1bd27bd
SHA1

cd63f6381c56fe42e1017b6cd7c1213d4a9cb47f
SHA256

b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f
SHA512

0993b75d7e0109872133d6c80cab43472290063eef498c1638afcd5e4e81a2a066f85773443d7974a0f845a76fe1a2404f599604e7395639701817b97c237d0a

Score

10^/10

vobfus persistence 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

T1060

Modify Registry

T1112

Processes:

b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe

Script User-Agent 2 IoCs

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

Processes:

description	flow	ioc
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe

pid process

2000 b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
Suspicious behavior: RenamesItself 1 IoCs

Processes:

b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe

pid process

2000 b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe

pid	process
2000	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
2000	b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe

C:\Users\Admin\AppData\Local\Temp\b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe
"C:\Users\Admin\AppData\Local\Temp\b4fbf0fa758cd1d88567b07920c2072ec7254b09d1c25cf12855006ea8efa82f.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious behavior: RenamesItself
- Suspicious use of SetWindowsHookEx
PID:2000

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/2000-59-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads