Malware Analysis Report

2024-11-15 09:08

Sample ID 201109-yl9gx5ly7s
Target cennc284.exe_
SHA256 4bbf19f2ad9ac3f5a816b918e5a2523f40f182b4847ef5ac6daca66094eb36e5
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

4bbf19f2ad9ac3f5a816b918e5a2523f40f182b4847ef5ac6daca66094eb36e5

Threat Level: Known bad

The file cennc284.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 20:13

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2020-11-09 20:13

Reported

2020-11-10 14:27

Platform

win7v20201028

Max time kernel

150s

Max time network

30s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cennc284.exe_.dll,#1

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\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cennc284.exe_.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cennc284.exe_.dll,#1

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/1964-0-0x0000000000000000-mapping.dmp

memory/1152-1-0x0000000000000000-mapping.dmp

C:\Users\Public\anFJjtYxH.eB_c_

MD5 bf9cfe46e69997b0d8ac4ffb528ab0df
SHA1 399337ad73221675067a85f3251e31042886d536
SHA256 395df3a563bc865221738b938998e6a45094f5c396302e4f151631e78aeb9d2d
SHA512 f432a42d355d5ac058dd68660b9d0a7bd901eaf3b55fd184b3fb2c7b075523eca7e1262bc757fc2600934112fde781823d721a32754f87f6501f487b36b10fa9

memory/1152-3-0x00000000029B0000-0x00000000029B4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-11-09 20:13

Reported

2020-11-10 14:27

Platform

win10v20201028

Max time kernel

149s

Max time network

102s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cennc284.exe_.dll,#1

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 4760 wrote to memory of 4780 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4760 wrote to memory of 4780 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4760 wrote to memory of 4780 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4780 wrote to memory of 4248 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\wscript.exe
PID 4780 wrote to memory of 4248 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\wscript.exe
PID 4780 wrote to memory of 4248 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\wscript.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cennc284.exe_.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\cennc284.exe_.dll,#1

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/4780-0-0x0000000000000000-mapping.dmp

memory/4248-1-0x0000000000000000-mapping.dmp

C:\Users\Public\anFJjtYxH.eB_c_

MD5 bf9cfe46e69997b0d8ac4ffb528ab0df
SHA1 399337ad73221675067a85f3251e31042886d536
SHA256 395df3a563bc865221738b938998e6a45094f5c396302e4f151631e78aeb9d2d
SHA512 f432a42d355d5ac058dd68660b9d0a7bd901eaf3b55fd184b3fb2c7b075523eca7e1262bc757fc2600934112fde781823d721a32754f87f6501f487b36b10fa9