valak | b9bea7b9328edd5b391c66e634ab42bb5d9a05c76d76fbebac8e81f36c3b333b | Triage™

Analysis

max time kernel
150s
max time network
31s
platform
windows7_x64
resource
win7v200430
submitted
09/06/2020, 22:53

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General

Target
file.exe.dll
Size 289KB
Sample200609-26dftcsdgj
SHA256 b9bea7b9328edd5b391c66e634ab42bb5d9a05c76d76fbebac8e81f36c3b333b
MD5 cb82bf060afe5a4e862cbe246e69ab7d
SHA1 68c4bd00bacebbf08e3d5e7af2e7f4e4379366de
SHA512 a9a8c9bc08a10533ffee3e6ff39c750d2222dc4ca3b619c2c96bf24ef6b218a1918e3166847d8f53132f26fb2ad5f061549fff99c08c01b823c6625e200fd66c
MD5 SHA1 SHA512

Score

10^/10

Loader valak

Malware Config

Signatures

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 880 wrote to memory of 1048	880	rundll32.exe	24
PID 880 wrote to memory of 1048	880	rundll32.exe	24
PID 880 wrote to memory of 1048	880	rundll32.exe	24
PID 880 wrote to memory of 1048	880	rundll32.exe	24
PID 880 wrote to memory of 1048	880	rundll32.exe	24
PID 880 wrote to memory of 1048	880	rundll32.exe	24
PID 880 wrote to memory of 1048	880	rundll32.exe	24
PID 1048 wrote to memory of 1512	1048	rundll32.exe	27
PID 1048 wrote to memory of 1512	1048	rundll32.exe	27
PID 1048 wrote to memory of 1512	1048	rundll32.exe	27
PID 1048 wrote to memory of 1512	1048	rundll32.exe	27

Valak JavaScript Loader 1 IoCs

resource	yara_rule
behavioral1/files/0x00040000000131b8-0.dat	valak

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

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\file.exe.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:880
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\file.exe.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1048
- - C:\Windows\SysWOW64\wscript.exe
    wscript.exe //E:jscript "C:\Users\Public\CCGYPWTwr.iySAE
    3⤵
    PID:1512

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:656

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/1512-1-0x00000000027C0000-0x00000000027C4000-memory.dmp

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