wshrat | 6ac7bb6d40e9d2428d67829edbbefe33bc8a75e612fc2af7b00e86cf81d3ffd9

Analysis

max time kernel
151s
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
30/11/2022, 13:59

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
DOC#56786976.PDF.js
Size 553KB
Sample221130-rad2xaad4t
SHA256 6ac7bb6d40e9d2428d67829edbbefe33bc8a75e612fc2af7b00e86cf81d3ffd9
MD5 ac5953e12c489773159d02ab4c32cb04
SHA1 ba2420cb3fe03baec892e7d190471b86da806e17
SHA512 e817ba5a41498d3de11521f548e659668a64c5e84540c51494b55a1e3a6421a58bee74e8da775b5cd967c56f4f1cec8329ca647f059900d39fdf8524ea7518a5
SSDEEP 12288:iHbgresx00lcmv5ngXSiQG01v94S4Cjg8:/x00Oi
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wshrat persistence trojan

Malware Config

Extracted

Family

wshrat

http://goodies.dynamic-dns.net:9202

Signatures

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

Blocklisted process makes network request 23 IoCs

flow	pid	Process
7	1864	wscript.exe
9	1864	wscript.exe
12	1864	wscript.exe
14	1864	wscript.exe
15	1864	wscript.exe
19	1864	wscript.exe
41	1864	wscript.exe
42	1864	wscript.exe
50	1864	wscript.exe
51	1864	wscript.exe
52	1864	wscript.exe
54	1864	wscript.exe
55	1864	wscript.exe
56	1864	wscript.exe
58	1864	wscript.exe
59	1864	wscript.exe
60	1864	wscript.exe
61	1864	wscript.exe
62	1864	wscript.exe
63	1864	wscript.exe
64	1864	wscript.exe
65	1864	wscript.exe
66	1864	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-1-5-21-2891029575-1462575-1165213807-1000\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\DOC#56786976.PDF.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DOC#56786976.PDF.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\DOC#56786976 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\DOC#56786976.PDF.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\DOC#56786976 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\DOC#56786976.PDF.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
6	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

Script User-Agent 2 IoCs

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

description	flow	ioc
HTTP User-Agent header	9	WSHRAT\|2C4BFA22\|XZIOFAVD\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 30/11/2022\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	12	WSHRAT\|2C4BFA22\|XZIOFAVD\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 30/11/2022\|JavaScript-v3.4\|NL:Netherlands

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 1864	2736	wscript.exe	79
PID 2736 wrote to memory of 1864	2736	wscript.exe	79

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\DOC#56786976.PDF.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2736
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Local\Temp\DOC#56786976.PDF.js" /elevated
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:1864

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

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads