wshrat | 6766c478915817f5a95bc278a0205a89d0fbc03432d544399b70ab3fdc137001

Analysis

max time kernel
172s
max time network
178s
platform
windows10-2004_x64
resource
win10v2004-20231020-en
resource tags

arch:x64arch:x86image:win10v2004-20231020-enlocale:en-usos:windows10-2004-x64system
submitted
08-11-2023 08:10

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General

Target

ORDER-23118FC.pdf.js
Size

7KB
MD5

cf34cf3dc725d0145cb4b3ecfba459e7
SHA1

365a0053eed4c3b621521231c00cd88fef001328
SHA256

6766c478915817f5a95bc278a0205a89d0fbc03432d544399b70ab3fdc137001
SHA512

b5bf5cb90d6e1081cf78dbecf73236f8dc33b0a3c3f9e137c0707006fa6e330b727281be6f3bfbf45fb1db3bfd6249d50d6bc20782aaae79daf4451b0693a32a
SSDEEP

48:hSJE7GJLO4JJoNK5JzOTwgNS2utIGndHsRbJJz0GhD7GJ5o4fuwufQAJ6Gmfo/iT:yO1wtOMgR1uMF5SNEiGF4sdc

Score

10^/10

wshrat persistence trojan

Malware Config

Extracted

Family

wshrat

http://chongmei33.publicvm.com:7045

Signatures

WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

Blocklisted process makes network request 27 IoCs

flow	pid	Process
4	2592	wscript.exe
11	2592	wscript.exe
13	2592	wscript.exe
15	2592	wscript.exe
40	2952	WScript.exe
56	2952	WScript.exe
66	2952	WScript.exe
69	2952	WScript.exe
70	2952	WScript.exe
71	2952	WScript.exe
72	2952	WScript.exe
73	2952	WScript.exe
80	2952	WScript.exe
84	2952	WScript.exe
86	2952	WScript.exe
87	2952	WScript.exe
91	2952	WScript.exe
92	2952	WScript.exe
93	2952	WScript.exe
94	2952	WScript.exe
95	2952	WScript.exe
99	2952	WScript.exe
100	2952	WScript.exe
106	2952	WScript.exe
111	2952	WScript.exe
112	2952	WScript.exe
113	2952	WScript.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350690463-3549324357-1323838019-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VRVLMK.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VRVLMK.vbs	WScript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VRVLMK = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\VRVLMK.vbs\""	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3350690463-3549324357-1323838019-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VRVLMK = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\VRVLMK.vbs\""	WScript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3350690463-3549324357-1323838019-1000_Classes\Local Settings	wscript.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2592 wrote to memory of 2952	2592	wscript.exe	91
PID 2592 wrote to memory of 2952	2592	wscript.exe	91

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\ORDER-23118FC.pdf.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2592
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\VRVLMK.vbs"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:2952

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\VRVLMK.vbs

Filesize
209KB

MD5
f98b2d9799e83e700d3be6e231c3e615

SHA1
2f015cd0918335e2847eef255b63d46b983cb653

SHA256
5f68fdf47b0e899369554258245c474772ba2dd1d10263200c93e988d41e22ff

SHA512
01ace290765ea93a2e481c2e7636c2ee5b60cad7932be3bd841c90abd51c3642accf8a40f9b8814650067a64773446980a959379ff5ef1460c7377264e3f85cc

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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VRVLMK.vbs

Filesize
209KB

MD5
f98b2d9799e83e700d3be6e231c3e615

SHA1
2f015cd0918335e2847eef255b63d46b983cb653

SHA256
5f68fdf47b0e899369554258245c474772ba2dd1d10263200c93e988d41e22ff

SHA512
01ace290765ea93a2e481c2e7636c2ee5b60cad7932be3bd841c90abd51c3642accf8a40f9b8814650067a64773446980a959379ff5ef1460c7377264e3f85cc

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads