vobfus | abf90f6260759e71bd11e41af4ddc7bdb97a23b06abc5daf55b17fcdc2e8a0cc

General

Target

bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe
Size

4.3MB
MD5

343181e3037a1163bada143d412416f9
SHA1

308eb01f0ccd0c6b58208990338ce812c47b9541
SHA256

bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad
SHA512

f5dba363693533550a5e0b52ec3bfa8a3d2229ab81ec8c8a358c8be3315b84e65754f02f0e43caeb86743b11133d52e6f6aad4756799c8e2318b4db78b26f86a
SSDEEP

98304:Vbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb6:8

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
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"	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe
Key created	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2084-0-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/files/0x000c00000001226d-7.dat	upx
behavioral1/memory/2084-24-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/2084-238-0x0000000000400000-0x0000000000437000-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"	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.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"	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.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	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.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
2084	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2084	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2084	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe
2084	bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe

C:\Users\Admin\AppData\Local\Temp\bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.exe
"C:\Users\Admin\AppData\Local\Temp\bcaa57298f0b6810f42df07dca8c896cb8de1102f7357e701f47b0daae6670ad.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:2084

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
4.3MB

MD5
b6523423745b00566d843793a570004b

SHA1
908699efa90d2b0193d7e5323163bc475779ce08

SHA256
80d8ce4f824e23bbfe9289442c3850ced783c9cd40f619fcd26329e6082f6aec

SHA512
e84542708bea68ee69caa58758ce036ae9670ca7fe3c47ac6cddc749d86b785800e84c81ba60f96a2968724529d7b2f435cc7541d2c2cfbf6eb33fca0e5f7e67

Download Submit
memory/2084-0-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2084-24-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2084-238-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads