vobfus | 1b9381edd94145370329e0a82d48608eccf4202c65666a733b916caa603ed56c

General

Target

5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe
Size

152KB
MD5

5fecb710ddc8f6c144a2c6e56cb763a9
SHA1

8dcf4c9e9b67f3b25dac847c18dc01c96578e99c
SHA256

1b9381edd94145370329e0a82d48608eccf4202c65666a733b916caa603ed56c
SHA512

273a7f5403754b2aebb06145110a0821efd2b8f78792b1430583fd7773bfbbbc6103e5fb5f29239acf213eb5506e3003d8dd151c7c101477405be537cf19c219
SSDEEP

1536:LaHq107vAVltkQo3T2k9/btav2v4rEq1/0SdJxq5gbnvluQDPwnEy3OcoeFFuTnU:Lejtav24r58SdJxbkn/jMTnU

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	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\EP2UZD4UPACGB = "C:\\Users\\Admin\\AppData\\Roaming\\B6JQQH221YP5.exe"	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\EP2UZD4UPACGB = "C:\\Users\\Admin\\AppData\\Roaming\\B6JQQH221YP5.exe"	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.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\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EP2UZD4UPACGB = "C:\\Users\\Admin\\AppData\\Roaming\\B6JQQH221YP5.exe"	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\EP2UZD4UPACGB = "C:\\Users\\Admin\\AppData\\Roaming\\B6JQQH221YP5.exe"	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4976 set thread context of 4864	4976	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe	87

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4864-0-0x0000000000400000-0x0000000000549000-memory.dmp	upx
behavioral2/memory/4864-2-0x0000000000400000-0x0000000000549000-memory.dmp	upx
behavioral2/memory/4864-3-0x0000000000400000-0x0000000000549000-memory.dmp	upx
behavioral2/memory/4864-4-0x0000000000400000-0x0000000000549000-memory.dmp	upx
behavioral2/memory/4864-9-0x0000000000400000-0x0000000000549000-memory.dmp	upx
behavioral2/memory/4864-10-0x0000000000400000-0x0000000000549000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 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	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe

Script User-Agent 6 IoCs

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

description	flow	ioc
HTTP User-Agent header	28	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	51	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	62	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	65	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	80	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	83	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
4864	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4864	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4976 wrote to memory of 4864	4976	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe	87
PID 4976 wrote to memory of 4864	4976	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe	87
PID 4976 wrote to memory of 4864	4976	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe	87
PID 4976 wrote to memory of 4864	4976	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe	87
PID 4976 wrote to memory of 4864	4976	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe	87
PID 4976 wrote to memory of 4864	4976	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe	87
PID 4976 wrote to memory of 4864	4976	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe	87
PID 4976 wrote to memory of 4864	4976	5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe	87

C:\Users\Admin\AppData\Local\Temp\5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4976
- C:\Users\Admin\AppData\Local\Temp\5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\5fecb710ddc8f6c144a2c6e56cb763a9_JaffaCakes118.exe"
  2⤵
  - Adds policy Run key to start application
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: RenamesItself
  - Suspicious use of SetWindowsHookEx
  PID:4864

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\Local\Temp\b6jqqh221yp5.exe.jpg

Filesize
152KB

MD5
5fecb710ddc8f6c144a2c6e56cb763a9

SHA1
8dcf4c9e9b67f3b25dac847c18dc01c96578e99c

SHA256
1b9381edd94145370329e0a82d48608eccf4202c65666a733b916caa603ed56c

SHA512
273a7f5403754b2aebb06145110a0821efd2b8f78792b1430583fd7773bfbbbc6103e5fb5f29239acf213eb5506e3003d8dd151c7c101477405be537cf19c219

Download Submit
memory/4864-0-0x0000000000400000-0x0000000000549000-memory.dmp

Filesize
1.3MB

Download
memory/4864-2-0x0000000000400000-0x0000000000549000-memory.dmp

Filesize
1.3MB

Download
memory/4864-3-0x0000000000400000-0x0000000000549000-memory.dmp

Filesize
1.3MB

Download
memory/4864-4-0x0000000000400000-0x0000000000549000-memory.dmp

Filesize
1.3MB

Download
memory/4864-9-0x0000000000400000-0x0000000000549000-memory.dmp

Filesize
1.3MB

Download
memory/4864-10-0x0000000000400000-0x0000000000549000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads