wshrat | d195a4460cbf030a568e980c5b07e7f33cb2f0d5b2f9634b1ca71ad43fafa8d6

General

Target
payment.js
Size 24KB
Sample221104-jm9eksdbh7
SHA256 d195a4460cbf030a568e980c5b07e7f33cb2f0d5b2f9634b1ca71ad43fafa8d6
MD5 b3d68dd5492fa261df75900cc205205f
SHA1 6b1ccb0ea2ad7f59ad4feff99f7c9f53218ac64d
SHA512 42695f2c81e09343dd8fb94c5a5a82235bc587c70f8ea0bfd4c4490cf5d38e57243f1c641cd72180c5d036fefb8454b651bec6931b86b7d15304bb10043931a0
SSDEEP 768:EIs214ugj9ZBAADEhsmaaqv8yZ/pzT84OFAjBM4b7:7sZ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wshrat persistence trojan

Malware Config

Extracted

Family

wshrat

C2

http://212.193.30.230:7780

Signatures

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

Blocklisted process makes network request 14 IoCs

flow	pid	Process
4	1556	wscript.exe
12	1556	wscript.exe
13	1556	wscript.exe
14	1556	wscript.exe
17	1556	wscript.exe
18	1556	wscript.exe
48	1556	wscript.exe
51	1556	wscript.exe
58	1556	wscript.exe
70	1556	wscript.exe
71	1556	wscript.exe
83	1556	wscript.exe
84	1556	wscript.exe
85	1556	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-1-5-21-2629973501-4017243118-3254762364-1000\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\payment.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\payment.js	wscript.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\payment = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\payment.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\payment = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\payment.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\payment = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\payment.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\payment = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\payment.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe

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

System Information Discovery
T1082

Script User-Agent 9 IoCs

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

description	flow	ioc
HTTP User-Agent header	4	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 4/11/2022\|JavaScript
HTTP User-Agent header	13	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 4/11/2022\|JavaScript
HTTP User-Agent header	14	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 4/11/2022\|JavaScript
HTTP User-Agent header	17	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 4/11/2022\|JavaScript
HTTP User-Agent header	84	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 4/11/2022\|JavaScript
HTTP User-Agent header	12	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 4/11/2022\|JavaScript
HTTP User-Agent header	48	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 4/11/2022\|JavaScript
HTTP User-Agent header	70	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 4/11/2022\|JavaScript
HTTP User-Agent header	83	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 4/11/2022\|JavaScript

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4612 wrote to memory of 1556	4612	wscript.exe	80
PID 4612 wrote to memory of 1556	4612	wscript.exe	80

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\payment.js
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4612
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\payment.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:1556

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

payment.js

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\payment.js
Size 24KB
SHA256 d195a4460cbf030a568e980c5b07e7f33cb2f0d5b2f9634b1ca71ad43fafa8d6
MD5 b3d68dd5492fa261df75900cc205205f
SHA1 6b1ccb0ea2ad7f59ad4feff99f7c9f53218ac64d
SHA512 42695f2c81e09343dd8fb94c5a5a82235bc587c70f8ea0bfd4c4490cf5d38e57243f1c641cd72180c5d036fefb8454b651bec6931b86b7d15304bb10043931a0
SSDEEP 768:EIs214ugj9ZBAADEhsmaaqv8yZ/pzT84OFAjBM4b7:7sZ
MD5 SHA1 SHA512 SSDEEP

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