vobfus | 5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20c

Analysis

max time kernel
119s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
17-12-2024 05:23

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General

Target

5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe
Size

213KB
MD5

025c99c2db124cfa01e4f382245a5eb0
SHA1

093b21bbecc4b80ec700360ac633f5ba46360fe2
SHA256

5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20c
SHA512

ddc0595037bc3e8cd262b1c67fd3344fced17c50f99d805d1db6f1f6143236f0e978363e3f47388b021417f15e23cf2c96e34473b235be8aac4dd598a43bebcf
SSDEEP

3072:+tnC1KpYs3ggunWFnzBHv/xWFsg8Wat/LFAVWPE5ac0l+nkS71CKbO1hvQ:34BBHng5HaZFj+nkS71CKbO1N

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	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender.exe"	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender.exe"	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.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\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender.exe"	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender.exe"	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3816-0-0x0000000000400000-0x0000000000438000-memory.dmp	upx
behavioral2/files/0x000a000000023bcd-7.dat	upx
behavioral2/memory/3816-9-0x0000000000400000-0x0000000000438000-memory.dmp	upx
behavioral2/memory/3816-73-0x0000000000400000-0x0000000000438000-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	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	13	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3816	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3816	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3816	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe
3816	5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe

C:\Users\Admin\AppData\Local\Temp\5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.exe
"C:\Users\Admin\AppData\Local\Temp\5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20cN.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:3816

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\Local\Temp\windefender.exe.jpg

Filesize
213KB

MD5
025c99c2db124cfa01e4f382245a5eb0

SHA1
093b21bbecc4b80ec700360ac633f5ba46360fe2

SHA256
5488cb5ffae5805ad79d8d4edc11750d855c1c6eb507291d371387f969d5c20c

SHA512
ddc0595037bc3e8cd262b1c67fd3344fced17c50f99d805d1db6f1f6143236f0e978363e3f47388b021417f15e23cf2c96e34473b235be8aac4dd598a43bebcf

Download Submit
memory/3816-0-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3816-9-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3816-73-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads