Malware Analysis Report

2025-03-15 05:52

Sample ID 240628-enzjjsshqp
Target 18b8180b554a0ce58fec184b94445eef_JaffaCakes118
SHA256 889b7f224acdc414ed35626c360b3120ad0acda018e313c5159d7b3de5badc82
Tags
vmprotect
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

889b7f224acdc414ed35626c360b3120ad0acda018e313c5159d7b3de5badc82

Threat Level: Shows suspicious behavior

The file 18b8180b554a0ce58fec184b94445eef_JaffaCakes118 was found to be: Shows suspicious behavior.

Malicious Activity Summary

vmprotect

Deletes itself

Executes dropped EXE

VMProtect packed file

Drops file in System32 directory

Unsigned PE

Checks processor information in registry

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-28 04:05

Signatures

VMProtect packed file

vmprotect
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-28 04:05

Reported

2024-06-28 04:08

Platform

win7-20240611-en

Max time kernel

149s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe"

Signatures

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\kkaaya.exe N/A

VMProtect packed file

vmprotect
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\kkaaya.exe C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe N/A
File opened for modification C:\Windows\SysWOW64\kkaaya.exe C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\SysWOW64\kkaaya.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\SysWOW64\kkaaya.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe"

C:\Windows\SysWOW64\kkaaya.exe

C:\Windows\SysWOW64\kkaaya.exe

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\18B818~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 2b.av0day.com udp

Files

memory/2140-0-0x0000000000400000-0x0000000000429000-memory.dmp

C:\Windows\SysWOW64\kkaaya.exe

MD5 18b8180b554a0ce58fec184b94445eef
SHA1 6fa27f2778dfefd5897e8bdfd58e8b206ecda99f
SHA256 889b7f224acdc414ed35626c360b3120ad0acda018e313c5159d7b3de5badc82
SHA512 7f9e525c225e7f5b271799a80b96a5b1b3edb165beff5dd5e31375bd5a51a312e701fc7f9f0e7fcf3dffb997db78eba21e38be980fad082db403ad6ee1c8e69a

memory/2168-3-0x0000000000400000-0x0000000000429000-memory.dmp

memory/2140-4-0x0000000000400000-0x0000000000429000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-28 04:05

Reported

2024-06-28 04:08

Platform

win10v2004-20240508-en

Max time kernel

150s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\fkjvgk.exe N/A

VMProtect packed file

vmprotect
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\fkjvgk.exe C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe N/A
File opened for modification C:\Windows\SysWOW64\fkjvgk.exe C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\SysWOW64\fkjvgk.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\SysWOW64\fkjvgk.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\18b8180b554a0ce58fec184b94445eef_JaffaCakes118.exe"

C:\Windows\SysWOW64\fkjvgk.exe

C:\Windows\SysWOW64\fkjvgk.exe

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c del C:\Users\Admin\AppData\Local\Temp\18B818~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp
US 8.8.8.8:53 2b.av0day.com udp

Files

memory/2300-0-0x0000000000400000-0x0000000000429000-memory.dmp

C:\Windows\SysWOW64\fkjvgk.exe

MD5 18b8180b554a0ce58fec184b94445eef
SHA1 6fa27f2778dfefd5897e8bdfd58e8b206ecda99f
SHA256 889b7f224acdc414ed35626c360b3120ad0acda018e313c5159d7b3de5badc82
SHA512 7f9e525c225e7f5b271799a80b96a5b1b3edb165beff5dd5e31375bd5a51a312e701fc7f9f0e7fcf3dffb997db78eba21e38be980fad082db403ad6ee1c8e69a

memory/2300-4-0x0000000000400000-0x0000000000429000-memory.dmp