vobfus | b6137dce9ddca24ba720d65ffb2fadac112e268e3be6e82fdd30c778f34249c0

Analysis

max time kernel
181s
max time network
205s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
15-03-2022 17:51

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General

Target

b61.exe
Size

236KB
MD5

c3494cc8b3aac24903c0ddf8095d919a
SHA1

1cd912956beb9c0419fe89c1d555e0480d9d182d
SHA256

b6137dce9ddca24ba720d65ffb2fadac112e268e3be6e82fdd30c778f34249c0
SHA512

f0c96bf71c42875a8708374faec409defdd353c36d554a91197f9ef94d54ac9920dc0b2a55ebc7c4f11ce2af8169467b148b586e0614d42dea8e3f0cad9e250e

Score

10^/10

vobfus persistence suricata worm

Malware Config

Signatures

Vobfus
A widespread worm which spreads via network drives and removable media.
worm vobfus
suricata: ET MALWARE BlackshadesRAT Reporting
suricata: ET MALWARE BlackshadesRAT Reporting
suricata

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

b61.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	b61.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	b61.exe
Key created	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	b61.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	b61.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

b61.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	b61.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	b61.exe
Key created	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows\CurrentVersion\Run	b61.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	b61.exe

Script User-Agent 2 IoCs

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

Processes:

description	flow	ioc
HTTP User-Agent header	12	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	37	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

b61.exe

pid process

1548 b61.exe
Suspicious behavior: RenamesItself 1 IoCs

Processes:

b61.exe

pid process

1548 b61.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

b61.exe

pid process

1548 b61.exe
1548 b61.exe

pid	process
1548	b61.exe

pid	process
1548	b61.exe

pid	process
1548	b61.exe
1548	b61.exe

C:\Users\Admin\AppData\Local\Temp\b61.exe
"C:\Users\Admin\AppData\Local\Temp\b61.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:1548

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1548-130-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

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