vobfus | 9531b2062aa7a49bc141d406496202c741cd77c290bfb270afd17a6a667a61f5

Analysis

max time kernel
4294212s
max time network
156s
platform
windows7_x64
resource
win7-20220311-en
submitted
14-03-2022 16:48

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General

Target

9531.exe
Size

236KB
MD5

ca9141204317d93f69d0a8f6556bd64e
SHA1

23b884199b74204fe19a70fb1e0d57a4af82e816
SHA256

9531b2062aa7a49bc141d406496202c741cd77c290bfb270afd17a6a667a61f5
SHA512

af3a94c891ba181cf9e82de07e00c2de16d0eb9af3eea6c20ce72dcd829034ef57a042dc353d83430f5b66872397f17fd3573de620adda8d91704fc8d00c2e6c

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:

9531.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	9531.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	9531.exe
Key created	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	9531.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	9531.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

9531.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Windows\CurrentVersion\Run	9531.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2199625441-3471261906-229485034-1000\Software\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	9531.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	9531.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	9531.exe

Script User-Agent 2 IoCs

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

Processes:

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

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

9531.exe

pid process

1072 9531.exe
Suspicious behavior: RenamesItself 1 IoCs

Processes:

9531.exe

pid process

1072 9531.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

9531.exe

pid process

1072 9531.exe
1072 9531.exe

pid	process
1072	9531.exe

pid	process
1072	9531.exe

pid	process
1072	9531.exe
1072	9531.exe

C:\Users\Admin\AppData\Local\Temp\9531.exe
"C:\Users\Admin\AppData\Local\Temp\9531.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:1072

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1072-54-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

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