vobfus | 13b21bf5da95f824edc00639c6cf87462c95709de4b219eb118a6534d8d5cdc3

Analysis

max time kernel
145s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28/02/2025, 19:54

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General

Target

JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe
Size

62KB
MD5

342751878d07e46f3efd6b853cf06272
SHA1

1d5199f7c879f803d50fa59896f89145e67bd699
SHA256

13b21bf5da95f824edc00639c6cf87462c95709de4b219eb118a6534d8d5cdc3
SHA512

19d64331046e5ff95c99eb98dddb03a72018d504b3471478a62f9e6ea7e2460d295e5a661ecb4f38e34bddb82d8f4f0896dff320fe6be671f08ba81ea5926b64
SSDEEP

1536:zPu7RNHlimXv8ikO+hBXT7G/5Pa0C9+XLUY:QL7vV+hp7Sap+bUY

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
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\AIGILQI7ZEAV5 = "C:\\Users\\Admin\\AppData\\Roaming\\6YWFCUHF.exe"	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\AIGILQI7ZEAV5 = "C:\\Users\\Admin\\AppData\\Roaming\\6YWFCUHF.exe"	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe
Key created	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	JaffaCakes118_342751878d07e46f3efd6b853cf06272.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\AIGILQI7ZEAV5 = "C:\\Users\\Admin\\AppData\\Roaming\\6YWFCUHF.exe"	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\AIGILQI7ZEAV5 = "C:\\Users\\Admin\\AppData\\Roaming\\6YWFCUHF.exe"	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2120 set thread context of 788	2120	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	30

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/788-12-0x0000000000400000-0x0000000000543000-memory.dmp	upx
behavioral1/memory/788-10-0x0000000000400000-0x0000000000543000-memory.dmp	upx
behavioral1/memory/788-9-0x0000000000400000-0x0000000000543000-memory.dmp	upx
behavioral1/memory/788-4-0x0000000000400000-0x0000000000543000-memory.dmp	upx
behavioral1/memory/788-5-0x0000000000400000-0x0000000000543000-memory.dmp	upx
behavioral1/memory/788-6-0x0000000000400000-0x0000000000543000-memory.dmp	upx
behavioral1/memory/788-17-0x0000000000400000-0x0000000000543000-memory.dmp	upx
behavioral1/memory/788-45-0x0000000000400000-0x0000000000543000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 10 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	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	5	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe

Suspicious use of WriteProcessMemory 63 IoCs

description	pid	Process	procid_target
PID 2120 wrote to memory of 788	2120	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	30
PID 2120 wrote to memory of 788	2120	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	30
PID 2120 wrote to memory of 788	2120	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	30
PID 2120 wrote to memory of 788	2120	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	30
PID 2120 wrote to memory of 788	2120	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	30
PID 2120 wrote to memory of 788	2120	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	30
PID 2120 wrote to memory of 788	2120	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	30
PID 788 wrote to memory of 2640	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	33
PID 788 wrote to memory of 2640	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	33
PID 788 wrote to memory of 2640	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	33
PID 788 wrote to memory of 2640	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	33
PID 788 wrote to memory of 2640	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	33
PID 788 wrote to memory of 2640	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	33
PID 788 wrote to memory of 2640	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	33
PID 788 wrote to memory of 2164	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	34
PID 788 wrote to memory of 2164	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	34
PID 788 wrote to memory of 2164	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	34
PID 788 wrote to memory of 2164	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	34
PID 788 wrote to memory of 2164	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	34
PID 788 wrote to memory of 2164	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	34
PID 788 wrote to memory of 2164	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	34
PID 788 wrote to memory of 1812	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	35
PID 788 wrote to memory of 1812	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	35
PID 788 wrote to memory of 1812	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	35
PID 788 wrote to memory of 1812	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	35
PID 788 wrote to memory of 1812	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	35
PID 788 wrote to memory of 1812	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	35
PID 788 wrote to memory of 1812	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	35
PID 788 wrote to memory of 2656	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	36
PID 788 wrote to memory of 2656	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	36
PID 788 wrote to memory of 2656	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	36
PID 788 wrote to memory of 2656	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	36
PID 788 wrote to memory of 2656	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	36
PID 788 wrote to memory of 2656	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	36
PID 788 wrote to memory of 2656	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	36
PID 788 wrote to memory of 1780	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	37
PID 788 wrote to memory of 1780	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	37
PID 788 wrote to memory of 1780	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	37
PID 788 wrote to memory of 1780	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	37
PID 788 wrote to memory of 1780	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	37
PID 788 wrote to memory of 1780	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	37
PID 788 wrote to memory of 1780	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	37
PID 788 wrote to memory of 1232	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	38
PID 788 wrote to memory of 1232	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	38
PID 788 wrote to memory of 1232	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	38
PID 788 wrote to memory of 1232	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	38
PID 788 wrote to memory of 1232	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	38
PID 788 wrote to memory of 1232	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	38
PID 788 wrote to memory of 1232	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	38
PID 788 wrote to memory of 2072	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	39
PID 788 wrote to memory of 2072	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	39
PID 788 wrote to memory of 2072	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	39
PID 788 wrote to memory of 2072	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	39
PID 788 wrote to memory of 2072	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	39
PID 788 wrote to memory of 2072	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	39
PID 788 wrote to memory of 2072	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	39
PID 788 wrote to memory of 2248	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	40
PID 788 wrote to memory of 2248	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	40
PID 788 wrote to memory of 2248	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	40
PID 788 wrote to memory of 2248	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	40
PID 788 wrote to memory of 2248	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	40
PID 788 wrote to memory of 2248	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	40
PID 788 wrote to memory of 2248	788	JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe	40

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2120
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_342751878d07e46f3efd6b853cf06272.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_342751878d07e46f3efd6b853cf06272.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
  - Suspicious use of WriteProcessMemory
  PID:788
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe "C:\Users\Admin\AppData\Local\Temp\MSWINSCK.OCX" /s
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2640
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe "C:\Users\Admin\AppData\Local\Temp\MSWINSCK.OCX" /s
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2164
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe "C:\Users\Admin\AppData\Local\Temp\MSWINSCK.OCX" /s
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1812
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe "C:\Users\Admin\AppData\Local\Temp\MSWINSCK.OCX" /s
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2656
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe "C:\Users\Admin\AppData\Local\Temp\MSWINSCK.OCX" /s
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1780
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe "C:\Users\Admin\AppData\Local\Temp\MSWINSCK.OCX" /s
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1232
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe "C:\Users\Admin\AppData\Local\Temp\MSWINSCK.OCX" /s
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2072
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe "C:\Users\Admin\AppData\Local\Temp\MSWINSCK.OCX" /s
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2248
- - C:\Windows\SysWOW64\regsvr32.exe
    regsvr32.exe "C:\Users\Admin\AppData\Local\Temp\MSWINSCK.OCX" /s
    3⤵
    PID:2548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\6ywfcuhf.exe.jpg

Filesize
62KB

MD5
342751878d07e46f3efd6b853cf06272

SHA1
1d5199f7c879f803d50fa59896f89145e67bd699

SHA256
13b21bf5da95f824edc00639c6cf87462c95709de4b219eb118a6534d8d5cdc3

SHA512
19d64331046e5ff95c99eb98dddb03a72018d504b3471478a62f9e6ea7e2460d295e5a661ecb4f38e34bddb82d8f4f0896dff320fe6be671f08ba81ea5926b64

Download Submit
memory/788-6-0x0000000000400000-0x0000000000543000-memory.dmp

Filesize
1.3MB

Download
memory/788-2-0x0000000000400000-0x0000000000543000-memory.dmp

Filesize
1.3MB

Download
memory/788-12-0x0000000000400000-0x0000000000543000-memory.dmp

Filesize
1.3MB

Download
memory/788-10-0x0000000000400000-0x0000000000543000-memory.dmp

Filesize
1.3MB

Download
memory/788-9-0x0000000000400000-0x0000000000543000-memory.dmp

Filesize
1.3MB

Download
memory/788-4-0x0000000000400000-0x0000000000543000-memory.dmp

Filesize
1.3MB

Download
memory/788-5-0x0000000000400000-0x0000000000543000-memory.dmp

Filesize
1.3MB

Download
memory/788-17-0x0000000000400000-0x0000000000543000-memory.dmp

Filesize
1.3MB

Download
memory/788-45-0x0000000000400000-0x0000000000543000-memory.dmp

Filesize
1.3MB

Download
memory/2120-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2120-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2120-1-0x0000000000220000-0x0000000000234000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads