vobfus | 66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09/01/2025, 23:40

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe
Size

224KB
MD5

d557ac6efb0104b0e17372f9f6c1cdc3
SHA1

1c1cf11b72f466800e3a2dde0ec91ba076946351
SHA256

66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03
SHA512

47804a6ef241cc5b75926ff00089dfc4fcc542b2f355b87750dbae5ee148e1e25e092d7224c6f8a578246fed69f3bbba460ad9b0f0b2ea6b67f3f0abed82ecfa
SSDEEP

3072:vHjk+0oLnWFnzBHv/xWFsg8WatFBGFVWPE5ac0pG/1z+QVMbg1jm0+J:Po/BHng5HaVG4G/1z+QVMbg1jv+

Score

10^/10

vobfus discovery persistence upx 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_d557ac6efb0104b0e17372f9f6c1cdc3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4460-0-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral2/files/0x000a000000023bb1-7.dat	upx
behavioral2/memory/4460-25-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral2/memory/4460-239-0x0000000000400000-0x0000000000437000-memory.dmp	upx

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_d557ac6efb0104b0e17372f9f6c1cdc3.exe

Script User-Agent 2 IoCs

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

description	flow	ioc
HTTP User-Agent header	15	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	42	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4460	JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4460	JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4460	JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe
4460	JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_d557ac6efb0104b0e17372f9f6c1cdc3.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:4460

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
224KB

MD5
230678f5d6edcfb731f785b0a9db6ab7

SHA1
b489bb362ee2c825bc77a91eb23a6a9299c16468

SHA256
5c357ae909a9307cb4de10ca4d220bd18cf05f1c95b8277b6d071305f47bdd16

SHA512
91b8f65454a3f54709eb11613574c6b7696b87130577f29b673195854486b0c9c67c006e6513bf95027b873db432489e6db58acbf18a5c81f379d79f0da0f734

Download Submit
memory/4460-0-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/4460-25-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/4460-239-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads