valak | c2222ea9ba5e0bceba9721084fb70b803f6a4cbf962e98b9a8ea3125f76a685f

General

Target
adjure_06.26.2020.doc
Size 117KB
Sample200628-ap6kppw41j
SHA256 c2222ea9ba5e0bceba9721084fb70b803f6a4cbf962e98b9a8ea3125f76a685f
MD5 7ecef428b39c93f449292c1344c2d26f
SHA1 32170dadf5481cdf794bb13e8c794df277c1f828
SHA512 86bcadffcb89775307ba4f401f97dbec89e2eebc6f66b08b1b8cf9caa722951c7623a5007658c9bc08861a7191808ce649826111b9575d8c610240111c556967
MD5 SHA1 SHA512

Score

10^/10

valak Loader

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE is not expected to spawn this process	1044	3680	regsvr32.exe	66

Valak
Valak is a JavaScript loader, a link in a chain of distribution of other malware families.
Loader valak

Valak JavaScript Loader 2 IoCs

resource	yara_rule
behavioral2/files/0x000400000000068b-10.dat	valak
behavioral2/files/0x000400000000068b-10.dat	valak_js

Loads dropped DLL 1 IoCs

pid	Process
1176	regsvr32.exe

JavaScript code in executable 1 IoCs

resource	yara_rule
behavioral2/files/0x000400000000068b-10.dat	js

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	8	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
3680	WINWORD.EXE
3680	WINWORD.EXE

Suspicious use of SetWindowsHookEx 19 IoCs

pid	Process
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE
3680	WINWORD.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3680 wrote to memory of 1044	3680	WINWORD.EXE	71
PID 3680 wrote to memory of 1044	3680	WINWORD.EXE	71
PID 1044 wrote to memory of 1176	1044	regsvr32.exe	72
PID 1044 wrote to memory of 1176	1044	regsvr32.exe	72
PID 1044 wrote to memory of 1176	1044	regsvr32.exe	72
PID 1176 wrote to memory of 2192	1176	regsvr32.exe	77
PID 1176 wrote to memory of 2192	1176	regsvr32.exe	77
PID 1176 wrote to memory of 2192	1176	regsvr32.exe	77

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\adjure_06.26.2020.doc" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3680
- C:\Windows\SYSTEM32\regsvr32.exe
  regsvr32 c:\programdata\64961.jpg
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1044
- - C:\Windows\SysWOW64\regsvr32.exe
    c:\programdata\64961.jpg
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:1176
  - - C:\Windows\SysWOW64\wscript.exe
      wscript.exe //E:jscript "C:\Users\Public\whjkAbMaz.MVTXe
      4⤵
      PID:2192

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:860

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3680-0-0x0000024991C17000-0x0000024991C1C000-memory.dmp

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memory/3680-1-0x0000024991C17000-0x0000024991C1C000-memory.dmp

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memory/3680-2-0x0000024991C0F000-0x0000024991C17000-memory.dmp

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memory/3680-3-0x0000024991C0F000-0x0000024991C17000-memory.dmp

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memory/3680-4-0x0000024991C0F000-0x0000024991C17000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads