vobfus | 658e58c252cc58c91686ee418a0c428a9bed41c7821d15edd8d4a0e91f394020

General

Target

e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
Size

4.7MB
MD5

854ae84b28a573509c76979856c2dd6a
SHA1

a94c51ec86c0291719732780a70d7c2dcf4e780e
SHA256

e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173
SHA512

dd0c4975e47ae682651f7b43fa9bef63ddc54e83f26f5cacce746aadb3ca90f5e32d1154c6d66aef5705778d8dcd50d9c3f0a0f5f60f606349e2b9a230ff4bbc
SSDEEP

98304:VbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbU:K

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

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\USER\S-1-5-21-2703099537-420551529-3771253338-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2548-0-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/files/0x00080000000120fd-7.dat	upx
behavioral1/memory/2548-10-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/2548-67-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/2548-281-0x0000000000400000-0x0000000000437000-memory.dmp	upx

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"	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.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	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.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
2548	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2548	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2548	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
2548	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe

C:\Users\Admin\AppData\Local\Temp\e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
"C:\Users\Admin\AppData\Local\Temp\e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.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:2548

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\Roaming\AG58FPQON.exe

Filesize
4.7MB

MD5
681237e2e4741db26a3af80578a01fc1

SHA1
0c0830518058e79d769da7095045bc0b3720bb62

SHA256
7a587676857abd1ccf9213b4278225104ba54117142610f9d99882d035bfb282

SHA512
e337b979203023a86f8971400f9c53cc20ba7b7bfe49d90b0bd7c9d268b85aa2b99f2ab7f4ca6e46758d7f47318bbb5d60a69e30712497d1989fb79aa4ce4d96

Download Submit
memory/2548-0-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2548-10-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2548-67-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2548-281-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads