vobfus | 8301b0a6fd1f48adcf0a61ce61c115454a98fb05fea84cc4f9838c96f34e1282

Analysis

max time kernel
119s
max time network
84s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
02/08/2024, 11:43

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General

Target

9b2d36dbc697798c6f48b2117abbdf90N.exe
Size

212KB
MD5

9b2d36dbc697798c6f48b2117abbdf90
SHA1

a4b3dcf222cc7e8e0d4179d5c220d632b01fd244
SHA256

8301b0a6fd1f48adcf0a61ce61c115454a98fb05fea84cc4f9838c96f34e1282
SHA512

436168bc7780efc56bbf0305409e75235ef9088aeeaf369dda24d30e75ee52107be10cfa4f6df9a6c5f4dd101b63c5b3cc0d7931921ea712e251dbe964296e3c
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

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	9b2d36dbc697798c6f48b2117abbdf90N.exe
Key created	\REGISTRY\USER\S-1-5-21-2257386474-3982792636-3902186748-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	9b2d36dbc697798c6f48b2117abbdf90N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2257386474-3982792636-3902186748-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	9b2d36dbc697798c6f48b2117abbdf90N.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	9b2d36dbc697798c6f48b2117abbdf90N.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"	9b2d36dbc697798c6f48b2117abbdf90N.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2257386474-3982792636-3902186748-1000\Software\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	9b2d36dbc697798c6f48b2117abbdf90N.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	9b2d36dbc697798c6f48b2117abbdf90N.exe

Script User-Agent 1 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)

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2052	9b2d36dbc697798c6f48b2117abbdf90N.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2052	9b2d36dbc697798c6f48b2117abbdf90N.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2052	9b2d36dbc697798c6f48b2117abbdf90N.exe
2052	9b2d36dbc697798c6f48b2117abbdf90N.exe

C:\Users\Admin\AppData\Local\Temp\9b2d36dbc697798c6f48b2117abbdf90N.exe
"C:\Users\Admin\AppData\Local\Temp\9b2d36dbc697798c6f48b2117abbdf90N.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:2052

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
212KB

MD5
14f78262041bdf1e4c8b07733df767ba

SHA1
b94d86bf7a157464dc527efa866571b85de449ef

SHA256
3036a53808ed6642e196d55ff0a0a8d9a8a6400121c260075dbf0eca8ac10e45

SHA512
7daaf243b03a8e4ac16f511c6698861a14152849e27a72f88d704706bef676ee1e3bcc4e10ff99db21b6f1627e4e0c33290b15f0c6908bfbda4ec3aa3d3b7a73

Download Submit
memory/2052-0-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2052-31-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download
memory/2052-245-0x0000000000400000-0x0000000000434000-memory.dmp

Filesize
208KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads