Malware Analysis Report

2024-11-15 09:08

Sample ID 201109-3fey4l6556
Target haao1.cab.exe_
SHA256 a6c6ab892399b0496ffcd15d3af8dc8840818439367b990f60f51c95c8e56305
Tags
valak Loader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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
10/10

SHA256

a6c6ab892399b0496ffcd15d3af8dc8840818439367b990f60f51c95c8e56305

Threat Level: Known bad

The file haao1.cab.exe_ was found to be: Known bad.

Malicious Activity Summary

valak Loader

Valak

Valak JavaScript Loader

JavaScript code in executable

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2020-11-09 20:14

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-11-09 20:14

Reported

2020-11-10 14:44

Platform

win7v20201028

Max time kernel

144s

Max time network

12s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\haao1.cab.exe_.dll

Signatures

Valak

Loader valak

Valak JavaScript Loader

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

JavaScript code in executable

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

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\haao1.cab.exe_.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\haao1.cab.exe_.dll

C:\Windows\SysWOW64\wscript.exe

wscript.exe //E:jscript "C:\Users\Public\anFJjtYxH.eB_c_

C:\Windows\system32\wbem\WmiApSrv.exe

C:\Windows\system32\wbem\WmiApSrv.exe

C:\Windows\system32\wbem\WmiApSrv.exe

C:\Windows\system32\wbem\WmiApSrv.exe

Network

N/A

Files

memory/1352-0-0x0000000000000000-mapping.dmp

memory/804-1-0x0000000000000000-mapping.dmp

C:\Users\Public\anFJjtYxH.eB_c_

MD5 bf9cfe46e69997b0d8ac4ffb528ab0df
SHA1 399337ad73221675067a85f3251e31042886d536
SHA256 395df3a563bc865221738b938998e6a45094f5c396302e4f151631e78aeb9d2d
SHA512 f432a42d355d5ac058dd68660b9d0a7bd901eaf3b55fd184b3fb2c7b075523eca7e1262bc757fc2600934112fde781823d721a32754f87f6501f487b36b10fa9

memory/804-3-0x00000000027A0000-0x00000000027A4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-11-09 20:14

Reported

2020-11-10 14:44

Platform

win10v20201028

Max time kernel

141s

Max time network

116s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\haao1.cab.exe_.dll

Signatures

Valak

Loader valak

Valak JavaScript Loader

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

JavaScript code in executable

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3932 wrote to memory of 788 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3932 wrote to memory of 788 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 3932 wrote to memory of 788 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 788 wrote to memory of 200 N/A C:\Windows\SysWOW64\regsvr32.exe C:\Windows\SysWOW64\wscript.exe
PID 788 wrote to memory of 200 N/A C:\Windows\SysWOW64\regsvr32.exe C:\Windows\SysWOW64\wscript.exe
PID 788 wrote to memory of 200 N/A C:\Windows\SysWOW64\regsvr32.exe C:\Windows\SysWOW64\wscript.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\haao1.cab.exe_.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\haao1.cab.exe_.dll

C:\Windows\SysWOW64\wscript.exe

wscript.exe //E:jscript "C:\Users\Public\anFJjtYxH.eB_c_

C:\Windows\system32\wbem\WmiApSrv.exe

C:\Windows\system32\wbem\WmiApSrv.exe

C:\Windows\system32\wbem\WmiApSrv.exe

C:\Windows\system32\wbem\WmiApSrv.exe

C:\Windows\system32\wbem\WmiApSrv.exe

C:\Windows\system32\wbem\WmiApSrv.exe

Network

N/A

Files

memory/788-0-0x0000000000000000-mapping.dmp

memory/200-1-0x0000000000000000-mapping.dmp

C:\Users\Public\anFJjtYxH.eB_c_

MD5 bf9cfe46e69997b0d8ac4ffb528ab0df
SHA1 399337ad73221675067a85f3251e31042886d536
SHA256 395df3a563bc865221738b938998e6a45094f5c396302e4f151631e78aeb9d2d
SHA512 f432a42d355d5ac058dd68660b9d0a7bd901eaf3b55fd184b3fb2c7b075523eca7e1262bc757fc2600934112fde781823d721a32754f87f6501f487b36b10fa9