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\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
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

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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VLXHCMT5KJ = "C:\\Users\\Admin\\AppData\\Roaming\\AG58FPQON.exe"	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1504-0-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral2/files/0x000b000000023bc4-7.dat	upx
behavioral2/memory/1504-10-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral2/memory/1504-11-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral2/memory/1504-82-0x0000000000400000-0x0000000000437000-memory.dmp	upx
behavioral2/memory/1504-225-0x0000000000400000-0x0000000000437000-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	17	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	43	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1504	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
1504	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1504	JaffaCakes118_5f9d4155858bf995f1120af29175bd40.exe
1504	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:1504

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
678de5348f1cfd70b34e9834c0345064

SHA1
fe29f440750f0cdf8022c160b77f6caaa20683db

SHA256
cc97814aacbf7727dd1affdbcb203dfd6907ea8494cb411de4e4ccd4de0fff67

SHA512
026e71e10103e6fed1e4f32bb412cca6ba3c8f3749f981e09417e01141b1185c0ebcf076b4652e9982d198320d7705cc2a636c0a2bd72eca360405a9d9141332

Download Submit
memory/1504-0-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1504-10-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1504-11-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1504-82-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download
memory/1504-225-0x0000000000400000-0x0000000000437000-memory.dmp

Filesize
220KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads