wshrat | 749f06ddf9408597828f68ac69a74627d8fe31b23c0e25f5dbfb92301c0d2898

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
09/11/2022, 10:38

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General

Target
shipment documents.js
Size 261KB
Sample221109-mpdmgagaf3
SHA256 749f06ddf9408597828f68ac69a74627d8fe31b23c0e25f5dbfb92301c0d2898
MD5 3e1912c2b0aeb17efa1a1a264b95990d
SHA1 7d2b1111ea0d56dd41dbb83d1685be38e8269dd0
SHA512 f4352a6aafd9edfeb155a4d5b31bfe08383751e5c5cadee1a3f54c6ba1cf2ec765a108a260470204c532bcc8534ebc020b8d5c1f77e0b84c548545c6236daad6
SSDEEP 6144:GQdLQjTvan7FriEnXqdp1iBIj57JWokqNfiOgH8wEkmW:NdqTyJX87iqXs2hY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wshrat persistence trojan

Malware Config

Extracted

Family

wshrat

http://egodds.longmusic.com:2048

Signatures

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

Blocklisted process makes network request 11 IoCs

flow	pid	Process
14	2796	wscript.exe
16	2796	wscript.exe
18	2796	wscript.exe
20	2796	wscript.exe
34	2796	wscript.exe
45	2796	wscript.exe
49	2796	wscript.exe
54	2796	wscript.exe
56	2796	wscript.exe
60	2796	wscript.exe
62	2796	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-1-5-21-2295526160-1155304984-640977766-1000\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\shipment documents.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\shipment documents.js	wscript.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\shipment documents = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\shipment documents.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\shipment documents = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\shipment documents.js\""	wscript.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	ip-api.com

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings	wscript.exe

Runs .reg file with regedit 1 IoCs

pid	Process
1676	regedit.exe

Script User-Agent 5 IoCs

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

description	flow	ioc
HTTP User-Agent header	18	WSHRAT\|94D95F5C\|GBQHURCC\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 9/11/2022\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	45	WSHRAT\|94D95F5C\|GBQHURCC\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 9/11/2022\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	56	WSHRAT\|94D95F5C\|GBQHURCC\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 9/11/2022\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	60	WSHRAT\|94D95F5C\|GBQHURCC\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 9/11/2022\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	16	WSHRAT\|94D95F5C\|GBQHURCC\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 9/11/2022\|JavaScript-v3.4\|NL:Netherlands

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2796 wrote to memory of 1676	2796	wscript.exe	82
PID 2796 wrote to memory of 1676	2796	wscript.exe	82

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\shipment documents.js"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Windows\regedit.exe
  "regedit.exe" "C:\Users\Admin\AppData\Local\Temp\ebgeaegdbdecaedfebace.reg"
  2⤵
  - Runs .reg file with regedit
  PID:1676

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

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

ebgeaegdbdecaedfebace.reg

Path C:\Users\Admin\AppData\Local\Temp\ebgeaegdbdecaedfebace.reg
Size 143B
SHA256 cb68d50df5817e51ec5b2f72893dc4c749bf3504519107e0a78dda84d55f09e2
MD5 0e5411d7ecba9a435afda71c6c39d8fd
SHA1 2d6812052bf7be1b5e213e1d813ae39faa07284c
SHA512 903ac6e5c8a12607af267b54bcbbedfa5542c5b4f7ea289ab7c6a32a424d5b846ae406d830cb4ad48e2b46f92c504163c0856af8c3e09685a8855f39f616ddb1
MD5 SHA1 SHA512

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