vobfus | 7c7ef413f202f872188b5f8bc03da7bcdc949e173e5ff36b3babec039df3e7ab

Analysis

max time kernel
4294211s
max time network
147s
platform
windows7_x64
resource
win7-20220311-en
submitted
14-03-2022 05:15

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General

Target

stress.exe
Size

236KB
MD5

34cfaa2b644090578848134694a9ebeb
SHA1

4cccc6980db327256ddbd9e705dcbd5e2db06013
SHA256

7c7ef413f202f872188b5f8bc03da7bcdc949e173e5ff36b3babec039df3e7ab
SHA512

6a82385ef73fc4afdd0b23f1e802cba08d1e9a5da24be2d9cae62a129c9a4b4e86f99c9d3339323c2d6b36c29992e12964df19891baf8ed6cab6e306b0ccc952

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:

stress.exe

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

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

stress.exe

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

Script User-Agent 2 IoCs

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

Processes:

description	flow	ioc
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

stress.exe

pid process

1912 stress.exe
Suspicious behavior: RenamesItself 1 IoCs

Processes:

stress.exe

pid process

1912 stress.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

stress.exe

pid process

1912 stress.exe
1912 stress.exe

pid	process
1912	stress.exe

pid	process
1912	stress.exe

pid	process
1912	stress.exe
1912	stress.exe

C:\Users\Admin\AppData\Local\Temp\stress.exe
"C:\Users\Admin\AppData\Local\Temp\stress.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:1912

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/1912-54-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

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