Malware Analysis Report

2024-11-13 16:55

Sample ID 201109-pr9wfspgs6
Target 48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08
SHA256 48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08
Tags
valak
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08

Threat Level: Known bad

The file 48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08 was found to be: Known bad.

Malicious Activity Summary

valak

Valak JavaScript Loader

Valak family

ServiceHost packer

JavaScript code in executable

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2020-11-09 20:42

Signatures

Valak JavaScript Loader

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

Valak family

valak

JavaScript code in executable

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

Analysis: behavioral2

Detonation Overview

Submitted

2020-11-09 20:42

Reported

2020-11-10 23:32

Platform

win10v20201028

Max time kernel

142s

Max time network

142s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08.dll

Signatures

ServiceHost packer

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

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\regsvr32.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 412 wrote to memory of 2592 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 412 wrote to memory of 2592 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe
PID 412 wrote to memory of 2592 N/A C:\Windows\system32\regsvr32.exe C:\Windows\SysWOW64\regsvr32.exe

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08.dll

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2592 -s 616

Network

N/A

Files

memory/2592-0-0x0000000000000000-mapping.dmp

memory/3060-1-0x00000000047F0000-0x00000000047F1000-memory.dmp

memory/2592-2-0x0000000000000000-mapping.dmp

memory/3060-3-0x0000000004EA0000-0x0000000004EA1000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2020-11-09 20:42

Reported

2020-11-10 23:32

Platform

win7v20201028

Max time kernel

98s

Max time network

99s

Command Line

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08.dll

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\regsvr32.exe

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A

Processes

C:\Windows\system32\regsvr32.exe

regsvr32 /s C:\Users\Admin\AppData\Local\Temp\48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08.dll

C:\Windows\SysWOW64\regsvr32.exe

/s C:\Users\Admin\AppData\Local\Temp\48589dc79002ceb8d1a96a6dbc442c86aeb1ad19f4cea3182290e013f8380d08.dll

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1316 -s 296

Network

N/A

Files

memory/1316-0-0x0000000000000000-mapping.dmp

memory/1172-1-0x0000000000000000-mapping.dmp

memory/1172-2-0x0000000001E30000-0x0000000001E41000-memory.dmp

memory/1316-3-0x0000000000000000-mapping.dmp

memory/1172-4-0x00000000027B0000-0x00000000027C1000-memory.dmp