vobfus | c8a187841fc2239d257ce8c879f6554415e4d2ec023d58546bd3e5515dc97a2c

Analysis

max time kernel
150s
max time network
142s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08/01/2025, 01:35

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General

Target

JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe
Size

200KB
MD5

83f381215dda83927cc5f7262d2336eb
SHA1

1c359627ccb80caace273f2209ed92fe4f3cd171
SHA256

c8a187841fc2239d257ce8c879f6554415e4d2ec023d58546bd3e5515dc97a2c
SHA512

3e0bf5ede035e093df0d983b504a1146bab969f7814158d624b5dba752775d854c52a8349b9fef2ce235a44ecb5fa5793485732d2de2e8cd6e2def8ac759226b
SSDEEP

3072:3Hjk+0oLnWFnzBHv/xWFsg8WatFBGFVWPE5ac0pG/1z+QVMbg1:Xo/BHng5HaVG4G/1z+QVMbg1

Score

10^/10

vobfus discovery persistence worm

Malware Config

Signatures

Vobfus
A widespread worm which spreads via network drives and removable media.
worm vobfus
Vobfus family
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
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe
Key created	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe

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\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe

Script User-Agent 2 IoCs

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

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

pid	Process
2536	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2536	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2536	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe
2536	JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_83f381215dda83927cc5f7262d2336eb.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious behavior: RenamesItself
- Suspicious use of SetWindowsHookEx
PID:2536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\AG58FPQON.exe

Filesize
200KB

MD5
15adbd7353bed5e2b4c15f68c45abb1f

SHA1
a02793328b170ab5179ae705b900d6a3c8599464

SHA256
691628e65abfef8131eb0e777fb778699d71de7edeee1cf10901f869feff48de

SHA512
c19d44a8250093e57a458e774e3e247668c41c990be1d564d9bb3b82f179771d1c5bb29bd938af39ebe9353f6dc26b0d13f198d15e7dcbe4c8ede472442b194e

Download Submit
memory/2536-0-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2536-17-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2536-231-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads