vobfus | 9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146

General

Target

9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe
Size

213KB
MD5

4f2f3dac026cdfe6a91e3be55d16f8d4
SHA1

dea8c18e4f8a301b68058c1c7da1dd3f972b68c9
SHA256

9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146
SHA512

d57e31457b45c0fe58c11db57f7ded3ef2f27b774f7a795fad72097092242db560eb4ce1eaa7ebac1c3cd5bd6014cf80b76be74dd656ea34d6b8839cda063694
SSDEEP

3072:+tnC1KpYs3ggunWFnzBHv/xWFsg8Wat/LFAVWPE5ac0l+nkS71CKbO1hvQ0:34BBHng5HaZFj+nkS71CKbO1Nd

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	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender.exe"	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe
Key created	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender.exe"	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.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"	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsDefender = "C:\\Users\\Admin\\AppData\\Roaming\\windefender.exe"	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1428-0-0x0000000000400000-0x0000000000438000-memory.dmp	upx
behavioral2/memory/1428-5-0x0000000000400000-0x0000000000438000-memory.dmp	upx
behavioral2/files/0x000c000000023b19-8.dat	upx
behavioral2/memory/1428-24-0x0000000000400000-0x0000000000438000-memory.dmp	upx
behavioral2/memory/1428-88-0x0000000000400000-0x0000000000438000-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	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.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
1428	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1428	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1428	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe
1428	9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe

C:\Users\Admin\AppData\Local\Temp\9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.exe
"C:\Users\Admin\AppData\Local\Temp\9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146.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:1428

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

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
4f2f3dac026cdfe6a91e3be55d16f8d4

SHA1
dea8c18e4f8a301b68058c1c7da1dd3f972b68c9

SHA256
9436d36f5eb4fb9b4ea2d7e8967012e159f78a3ae2f708d40440a74b300fd146

SHA512
d57e31457b45c0fe58c11db57f7ded3ef2f27b774f7a795fad72097092242db560eb4ce1eaa7ebac1c3cd5bd6014cf80b76be74dd656ea34d6b8839cda063694

Download Submit
memory/1428-0-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1428-5-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1428-24-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/1428-88-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads