vobfus | fc01e75740fa310a51194804b3f8e5c12dc836112e96d6273fa21ed8c2978588

General

Target

66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe
Size

224KB
MD5

d557ac6efb0104b0e17372f9f6c1cdc3
SHA1

1c1cf11b72f466800e3a2dde0ec91ba076946351
SHA256

66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03
SHA512

47804a6ef241cc5b75926ff00089dfc4fcc542b2f355b87750dbae5ee148e1e25e092d7224c6f8a578246fed69f3bbba460ad9b0f0b2ea6b67f3f0abed82ecfa
SSDEEP

3072:vHjk+0oLnWFnzBHv/xWFsg8WatFBGFVWPE5ac0pG/1z+QVMbg1jm0+J:Po/BHng5HaVG4G/1z+QVMbg1jv+

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	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe
Key created	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2604-0-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/files/0x000700000001211a-7.dat	upx
behavioral1/memory/2604-24-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/2604-238-0x0000000000400000-0x0000000000437000-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"	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.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	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.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
2604	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2604	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2604	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe
2604	66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe

C:\Users\Admin\AppData\Local\Temp\66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.exe
"C:\Users\Admin\AppData\Local\Temp\66b7889a878aabf2ab2db5bc2f58b3d07197bf324150dc0bf7b0619ad31d5e03.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:2604

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
224KB

MD5
adf60bbcb0cc5100b522f3bcf4aae306

SHA1
a0ffbe5de6b140ad0eaf8ace59aa87edb5bb30b1

SHA256
3a55bb46e743728a26b6f2a94bead4d65d0e54590df42de5e8fbfe246a8dd6e0

SHA512
daa5164295758fe4e1cdc4fc46c2557690ed426cf71ff1cb34c3f10cdd46ebd18a044a398b45ef9d6f93c6159ab601236af9af7a8f2929976ab47b51f0b5be94

Download Submit
memory/2604-0-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2604-24-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2604-238-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads