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\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
Key created	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\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
behavioral2/memory/3156-0-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral2/files/0x000900000002341e-7.dat	upx
behavioral2/memory/3156-17-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral2/memory/3156-18-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral2/memory/3156-232-0x0000000000400000-0x0000000000437000-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\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\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	14	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	44	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3156	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
3156	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3156	e2a8d6ca8bcb6864b11602c4050cc671cc830dfcceb8e863a1a84be95443c173.exe
3156	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:3156

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
f9fbc88dc34769fdb3fae1b0d37ef456

SHA1
60fbe0e0e6cbd6c7a0887777e56af06e92ac6cb5

SHA256
c30d9c571a7970eee1ea3779e346497dfad5986e8264e6ef32f76eb19706ecd9

SHA512
69aa12b9dcfa2f2cd881f8d5878ffea35a958cc31b5e612327b259c9fdf8b7abe160f14e5fcc0cc764cad68125f97e4b7f7380bd6c3c259aeefc382a765b46eb

Download Submit
memory/3156-0-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/3156-17-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/3156-18-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/3156-232-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads