vobfus | 970abb2fb62e829fd3746efdc581d1358901ee9cc38694c7b8c32e231cb9ac74

General

Target

8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe
Size

3.6MB
MD5

9fc1694f1d2d156c164239547db46780
SHA1

4820364fdb30ab87268ac8a32e66eb5d90cb2026
SHA256

8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde
SHA512

9e518544e94eb54021af4dd09523e64ff2d7b55a25b0b505772d194bb35def9f5f126a249ac94532a4a0eb306a9b73f01e9b13440eee4213d8db1321d84a9314
SSDEEP

98304:Vbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb:x

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-1-5-21-2257386474-3982792636-3902186748-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.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"	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2616-0-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/files/0x00080000000120fc-7.dat	upx
behavioral1/memory/2616-10-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/2616-11-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/2616-82-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/2616-225-0x0000000000400000-0x0000000000437000-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"	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.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"	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.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	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe

Script User-Agent 2 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2616	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2616	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2616	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe
2616	8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe

C:\Users\Admin\AppData\Local\Temp\8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.exe
"C:\Users\Admin\AppData\Local\Temp\8e39d7263af6e16165cb81006724767dea0955111f2bd6a2df2c89a00a2cedde.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:2616

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
3.6MB

MD5
ab80faa3e99dc4bd39ec706f8ce69ddc

SHA1
4ff0b6f0a1571b06fd85895d80a079e702e5ebb9

SHA256
9197e4ab2f906b834e41182ed200d77b7a3dc6e11a90319da3755ea7b8bde0ab

SHA512
68a0afab4945db7c2e90c5aa76b4412bc2aff7e00e8ef3aece214d422a7c1c7d97733d4ceeb747228b8d6276c2c8fc2e44531631fa37206538c260139c00799b

Download Submit
memory/2616-0-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2616-10-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2616-11-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2616-82-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2616-225-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads