vobfus | 599ae381dfa5a7561b25847b275b5f9d411c5e1d4d947a86c87bcaa287d301fd

General

Target

effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe
Size

224KB
MD5

1b40a9bc8c11235de6b000605993bcda
SHA1

d273fb8d41503acd4e3595353c62fbd4c3f38c67
SHA256

effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f
SHA512

d6bb7e95c31dca8fd83ac15160ee61ca8e9769dab0808f5c3d9c59565a6c1278a5be5ebd0b73ff0e0ad206e6147086245ca10066b32a022617fb90e5d76ae316
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	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe
Key created	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2500-0-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/files/0x000b00000001202f-7.dat	upx
behavioral1/memory/2500-11-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/2500-75-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/2500-289-0x0000000000400000-0x0000000000437000-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"	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.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	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.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
2500	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2500	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2500	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe
2500	effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe

C:\Users\Admin\AppData\Local\Temp\effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.exe
"C:\Users\Admin\AppData\Local\Temp\effbfbbec6405fdd3ebc57014ca2cc5bf5208e93de509f77b98f6d44079e488f.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:2500

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
953b027d1756810cec51a33f190deacc

SHA1
788f751166c3452298910a61a23e7e98d4ed5f51

SHA256
9bb3e28267f4741a6db3343226cb6688fc793fb5d01bcdc1c18bef0d32bf50c8

SHA512
059a91255f44a9557f15d14ba0832354f391a8ba4113fc1790d422cf7d9aea453c386045a08e45bcf942960f33d169830f765a0f23a329e7d031ad60b223b6f4

Download Submit
memory/2500-0-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2500-11-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2500-75-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/2500-289-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads