vobfus | 4ab026da4f0df17224bf190c261dab72f06e40a3b15b44d79fdedaf401f615c6

General

Target

JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
Size

224KB
MD5

5f9d4155858bf995f1120af29175bd40
SHA1

b49e28e45ddca86146fb398ad90c7aa9a6c76557
SHA256

4ab026da4f0df17224bf190c261dab72f06e40a3b15b44d79fdedaf401f615c6
SHA512

044c38007d6705ec01a6faaedad430f1de33ec98fc5de58412e4dd101cd1110f7ec5d5473c736c92e4a57ad76253ec6f3bb8c91dbbc1477a24e4a2cf33507959
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
Vobfus family
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	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
Key created	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe

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"	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1088-0-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/files/0x0003000000011c28-7.dat	upx
behavioral1/memory/1088-10-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/1088-67-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral1/memory/1088-281-0x0000000000400000-0x0000000000437000-memory.dmp	upx

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	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.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
1088	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1088	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1088	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
1088	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_5f9d4155858bf995f1120af29175bd40.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:1088

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
83d71f9e2bdc5ff612f35bedf4373c3b

SHA1
613ab28346192511c1a3b60af6f15c3fbe64e4c0

SHA256
2fa9eb5c2e9ff58e713b40c01c3938c8e93710387d7cf1362cd7bce5daf25ce1

SHA512
cfcf9fdd4d3c8fb22043b4401f58cc82e55241ea091afaec24c3aa7a7512bde3a1dd95a0cc74a647fc6d85dcbcc9a915e424aea3e8e517902f1b2acbeb3a99df

Download Submit
memory/1088-0-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1088-10-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1088-67-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1088-281-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads