vobfus | a8a1f7bdc2077e273f5fe69b4254ba42473b5db8061548f3ad8c35d990faa3e7

Analysis

max time kernel
146s
max time network
152s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
28-08-2024 07:19

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe
Size

157KB
MD5

c66a1261aafecfa89f1a18e2d022f659
SHA1

80aa9859eea5c2e372cb4cec757dbdd6c6609586
SHA256

a8a1f7bdc2077e273f5fe69b4254ba42473b5db8061548f3ad8c35d990faa3e7
SHA512

4344e0006be67469b1b9e91dd5c2be658778e47da0e0687b3fd4fdfa4ea65ad7735a9f7d09e1190feae0cf6b2b21a06a0f8eb303f073422cc26088ec1da4ff18
SSDEEP

3072:cfI2gRG77z+b4Q8iagSd/m0bnZzqWPNnoa0zNwbGDMjQ20yuHZ231drLRWEmRwm9:wno87zw8Omm0TtqWPNnp0dY6H431dBWj

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\IXV8HXBJRNO6S = "C:\\Users\\Admin\\AppData\\Roaming\\EDB5819S3B1.exe"	javaapp.exe
Key created	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\run	javaapp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\IXV8HXBJRNO6S = "C:\\Users\\Admin\\AppData\\Roaming\\EDB5819S3B1.exe"	javaapp.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	javaapp.exe

Executes dropped EXE 3 IoCs

pid	Process
2728	javaapp.exe
2764	javaapp.exe
2660	javaapp.exe

Loads dropped DLL 5 IoCs

pid	Process
1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe
1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe
1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe
1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe
1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2764-47-0x0000000000400000-0x0000000000548000-memory.dmp	upx
behavioral1/memory/2764-45-0x0000000000400000-0x0000000000548000-memory.dmp	upx
behavioral1/memory/2764-44-0x0000000000400000-0x0000000000548000-memory.dmp	upx
behavioral1/memory/2764-64-0x0000000000400000-0x0000000000548000-memory.dmp	upx
behavioral1/memory/2764-68-0x0000000000400000-0x0000000000548000-memory.dmp	upx
behavioral1/memory/2764-86-0x0000000000400000-0x0000000000548000-memory.dmp	upx
behavioral1/memory/2764-111-0x0000000000400000-0x0000000000548000-memory.dmp	upx

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Run\javaupdatre = "C:\\Users\\Admin\\AppData\\Roaming\\javaapp.exe"	reg.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\IXV8HXBJRNO6S = "C:\\Users\\Admin\\AppData\\Roaming\\EDB5819S3B1.exe"	javaapp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows\CurrentVersion\Run\IXV8HXBJRNO6S = "C:\\Users\\Admin\\AppData\\Roaming\\EDB5819S3B1.exe"	javaapp.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2728 set thread context of 2764	2728	javaapp.exe	34
PID 2728 set thread context of 2660	2728	javaapp.exe	35

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	javaapp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	javaapp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	javaapp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	2	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2660	javaapp.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe
2728	javaapp.exe
2764	javaapp.exe
2660	javaapp.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 2776	1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe	30
PID 1732 wrote to memory of 2776	1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe	30
PID 1732 wrote to memory of 2776	1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe	30
PID 1732 wrote to memory of 2776	1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe	30
PID 2776 wrote to memory of 2692	2776	cmd.exe	32
PID 2776 wrote to memory of 2692	2776	cmd.exe	32
PID 2776 wrote to memory of 2692	2776	cmd.exe	32
PID 2776 wrote to memory of 2692	2776	cmd.exe	32
PID 1732 wrote to memory of 2728	1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe	33
PID 1732 wrote to memory of 2728	1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe	33
PID 1732 wrote to memory of 2728	1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe	33
PID 1732 wrote to memory of 2728	1732	c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe	33
PID 2728 wrote to memory of 2764	2728	javaapp.exe	34
PID 2728 wrote to memory of 2764	2728	javaapp.exe	34
PID 2728 wrote to memory of 2764	2728	javaapp.exe	34
PID 2728 wrote to memory of 2764	2728	javaapp.exe	34
PID 2728 wrote to memory of 2764	2728	javaapp.exe	34
PID 2728 wrote to memory of 2764	2728	javaapp.exe	34
PID 2728 wrote to memory of 2764	2728	javaapp.exe	34
PID 2728 wrote to memory of 2764	2728	javaapp.exe	34
PID 2728 wrote to memory of 2764	2728	javaapp.exe	34
PID 2728 wrote to memory of 2660	2728	javaapp.exe	35
PID 2728 wrote to memory of 2660	2728	javaapp.exe	35
PID 2728 wrote to memory of 2660	2728	javaapp.exe	35
PID 2728 wrote to memory of 2660	2728	javaapp.exe	35
PID 2728 wrote to memory of 2660	2728	javaapp.exe	35
PID 2728 wrote to memory of 2660	2728	javaapp.exe	35
PID 2728 wrote to memory of 2660	2728	javaapp.exe	35
PID 2728 wrote to memory of 2660	2728	javaapp.exe	35
PID 2764 wrote to memory of 340	2764	javaapp.exe	36
PID 2764 wrote to memory of 340	2764	javaapp.exe	36
PID 2764 wrote to memory of 340	2764	javaapp.exe	36
PID 2764 wrote to memory of 340	2764	javaapp.exe	36
PID 2764 wrote to memory of 340	2764	javaapp.exe	36
PID 2764 wrote to memory of 340	2764	javaapp.exe	36
PID 2764 wrote to memory of 340	2764	javaapp.exe	36

C:\Users\Admin\AppData\Local\Temp\c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c66a1261aafecfa89f1a18e2d022f659_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\LjZED.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "javaupdatre" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\javaapp.exe" /f
    3⤵
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    PID:2692
- C:\Users\Admin\AppData\Roaming\javaapp.exe
  "C:\Users\Admin\AppData\Roaming\javaapp.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2728
- - C:\Users\Admin\AppData\Roaming\javaapp.exe
    C:\Users\Admin\AppData\Roaming\javaapp.exe
    3⤵
    - Adds policy Run key to start application
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2764
  - - C:\Windows\SysWOW64\regsvr32.exe
      regsvr32.exe "C:\Users\Admin\AppData\Roaming\MSWINSCK.OCX" /s
      4⤵
      System Location Discovery: System Language Discovery
      PID:340
- - C:\Users\Admin\AppData\Roaming\javaapp.exe
    C:\Users\Admin\AppData\Roaming\javaapp.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2660

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 Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\LjZED.bat

Filesize
138B

MD5
436c51f33bd506ec8ffe22b5f70195eb

SHA1
6e2bbcdc65460c8e581523d3a2392e9e0d3ec975

SHA256
9963fbe891cd9d5ed860cdf65d1b427854465821cba2e498b58fd370c1989688

SHA512
e73efb5922cebf85631b00276a4a5a4d1fae31eae30fe94efce15474b6e9520aab3298739aca4bbf0f3c2391929cf5b6fd8b48624eee3d32f99b5a031bc45f3b

Download Submit
C:\Users\Admin\AppData\Roaming\MSWINSCK.OCX

Filesize
15KB

MD5
9831d56f861601f50b8e97eae97c4f3b

SHA1
a08a888b7b0ab157740c450c10ae87e32dec8ba7

SHA256
d08c94f834d5b1c9ec3c2f6572d1a412cbe377ea60ea68d61e2bb4ad6437ad52

SHA512
4055147ac2633434bcb0ed1a14f7a446c9da633de6fd2e25257cd09a73a82aa2ab554ab3a2c5b5a65e04067810884789215aca4cc6dd57344a8ebb3529263fbb

Download Submit
\Users\Admin\AppData\Roaming\javaapp.exe

Filesize
157KB

MD5
c66a1261aafecfa89f1a18e2d022f659

SHA1
80aa9859eea5c2e372cb4cec757dbdd6c6609586

SHA256
a8a1f7bdc2077e273f5fe69b4254ba42473b5db8061548f3ad8c35d990faa3e7

SHA512
4344e0006be67469b1b9e91dd5c2be658778e47da0e0687b3fd4fdfa4ea65ad7735a9f7d09e1190feae0cf6b2b21a06a0f8eb303f073422cc26088ec1da4ff18

Download Submit
memory/1732-63-0x0000000002CD0000-0x0000000002E65000-memory.dmp

Filesize
1.6MB

Download
memory/1732-0-0x0000000000400000-0x0000000000595000-memory.dmp

Filesize
1.6MB

Download
memory/1732-37-0x0000000000400000-0x0000000000595000-memory.dmp

Filesize
1.6MB

Download
memory/1732-38-0x0000000002CD0000-0x0000000002E65000-memory.dmp

Filesize
1.6MB

Download
memory/1732-34-0x0000000002CD0000-0x0000000002E65000-memory.dmp

Filesize
1.6MB

Download
memory/2660-52-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/2660-56-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/2660-60-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/2660-59-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/2660-48-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/2660-65-0x0000000000400000-0x0000000000407000-memory.dmp

Filesize
28KB

Download
memory/2728-55-0x0000000000400000-0x0000000000595000-memory.dmp

Filesize
1.6MB

Download
memory/2764-47-0x0000000000400000-0x0000000000548000-memory.dmp

Filesize
1.3MB

Download
memory/2764-64-0x0000000000400000-0x0000000000548000-memory.dmp

Filesize
1.3MB

Download
memory/2764-44-0x0000000000400000-0x0000000000548000-memory.dmp

Filesize
1.3MB

Download
memory/2764-68-0x0000000000400000-0x0000000000548000-memory.dmp

Filesize
1.3MB

Download
memory/2764-86-0x0000000000400000-0x0000000000548000-memory.dmp

Filesize
1.3MB

Download
memory/2764-45-0x0000000000400000-0x0000000000548000-memory.dmp

Filesize
1.3MB

Download
memory/2764-111-0x0000000000400000-0x0000000000548000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads