wshrat | 2a773f8a565116d3d666fddc8a0d767497562b0f65530a71a15dd3f4fd09765f

General

Target

Scan00518.js
Size

1.1MB
MD5

e6aa5b35052a7db7a2fd0e5efb6216e0
SHA1

63e7eaf2ed555512f6a8f9c19844671ec6b36c49
SHA256

2a773f8a565116d3d666fddc8a0d767497562b0f65530a71a15dd3f4fd09765f
SHA512

f3da3de0809110a59c6e8e720b8fe6a414106872232dfeded1221e1aedbc848c6233d80f1c8e6b3f68e10b9a7ab29359fcc03950a8a974a1e7d1527be86c6a5d
SSDEEP

1536:0N86LJBJZtqptvmDekNXSuR7skySWihwEaREBRbyHWhZiyX2jhEXEehgwNhNylr7:2sKar

Score

10^/10

wshrat persistence trojan

Malware Config

Extracted

Family

wshrat

C2

http://45.90.222.125:7121

Signatures

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

Blocklisted process makes network request 8 IoCs

flow	pid	Process
2	2032	wscript.exe
3	524	wscript.exe
7	524	wscript.exe
8	524	wscript.exe
9	524	wscript.exe
10	524	wscript.exe
11	524	wscript.exe
13	524	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Scan00518.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Scan00518.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
Key created	\REGISTRY\USER\S-1-5-21-2961826002-3968192592-354541192-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2961826002-3968192592-354541192-1000\Software\Microsoft\Windows\CurrentVersion\Run\Scan00518 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Scan00518.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Scan00518 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Scan00518.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2961826002-3968192592-354541192-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2961826002-3968192592-354541192-1000\Software\Microsoft\Windows\CurrentVersion\Run\Scan00518 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Scan00518.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Scan00518 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Scan00518.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).

System Information Discovery
T1082

Script User-Agent 6 IoCs

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

description	flow	ioc
HTTP User-Agent header	10	WSHRAT\|106B36FF\|HVMHZIYD\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 22/5/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	11	WSHRAT\|106B36FF\|HVMHZIYD\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 22/5/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	2	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	8	WSHRAT\|106B36FF\|HVMHZIYD\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 22/5/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	9	WSHRAT\|106B36FF\|HVMHZIYD\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 22/5/2023\|JavaScript-v3.4\|IN:India

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 524	2032	wscript.exe	29
PID 2032 wrote to memory of 524	2032	wscript.exe	29
PID 2032 wrote to memory of 524	2032	wscript.exe	29

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Scan00518.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\Scan00518.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:524

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Scan00518.js

Filesize
1.1MB

MD5
e6aa5b35052a7db7a2fd0e5efb6216e0

SHA1
63e7eaf2ed555512f6a8f9c19844671ec6b36c49

SHA256
2a773f8a565116d3d666fddc8a0d767497562b0f65530a71a15dd3f4fd09765f

SHA512
f3da3de0809110a59c6e8e720b8fe6a414106872232dfeded1221e1aedbc848c6233d80f1c8e6b3f68e10b9a7ab29359fcc03950a8a974a1e7d1527be86c6a5d

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Scan00518.js

Filesize
1.1MB

MD5
e6aa5b35052a7db7a2fd0e5efb6216e0

SHA1
63e7eaf2ed555512f6a8f9c19844671ec6b36c49

SHA256
2a773f8a565116d3d666fddc8a0d767497562b0f65530a71a15dd3f4fd09765f

SHA512
f3da3de0809110a59c6e8e720b8fe6a414106872232dfeded1221e1aedbc848c6233d80f1c8e6b3f68e10b9a7ab29359fcc03950a8a974a1e7d1527be86c6a5d

Download Submit
C:\Users\Admin\AppData\Roaming\Scan00518.js

Filesize
1.1MB

MD5
e6aa5b35052a7db7a2fd0e5efb6216e0

SHA1
63e7eaf2ed555512f6a8f9c19844671ec6b36c49

SHA256
2a773f8a565116d3d666fddc8a0d767497562b0f65530a71a15dd3f4fd09765f

SHA512
f3da3de0809110a59c6e8e720b8fe6a414106872232dfeded1221e1aedbc848c6233d80f1c8e6b3f68e10b9a7ab29359fcc03950a8a974a1e7d1527be86c6a5d

Download Submit

Analysis

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