wshrat | 51dd8819906a735ebf6cc646da4d4ed23937e66b39a55b0dca5b01e7a0ce3f6d

General

Target

Spec00301.js
Size

1.1MB
MD5

2640b5851d4ff75bfc5c3ddf9cea67c7
SHA1

377210fc1a662564fc2c88e0ee974b992bd396eb
SHA256

51dd8819906a735ebf6cc646da4d4ed23937e66b39a55b0dca5b01e7a0ce3f6d
SHA512

35ac8196a02b9e1a70cb8cc144b668f38eea87ba5645d102f384e7888423304108fe40d0b762e51d813cf1dbfbec1554c4dd1ef08f89718e17de6bc2a8821615
SSDEEP

3072:znsMGGRlz5Hay9mgUAbud4dGkgvsGHgke6K7lV:R9ml4dGUmK7D

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 9 IoCs

flow	pid	Process
2	2016	wscript.exe
3	740	wscript.exe
7	740	wscript.exe
8	740	wscript.exe
10	740	wscript.exe
11	740	wscript.exe
12	740	wscript.exe
13	740	wscript.exe
15	740	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Spec00301.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Spec00301.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\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\Spec00301 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Spec00301.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Spec00301 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Spec00301.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\Spec00301 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Spec00301.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Spec00301 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Spec00301.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\software\microsoft\windows\currentversion\run	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\|C0585B3B\|MLXLFKOI\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 19/5/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	11	WSHRAT\|C0585B3B\|MLXLFKOI\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 19/5/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	12	WSHRAT\|C0585B3B\|MLXLFKOI\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 19/5/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	13	WSHRAT\|C0585B3B\|MLXLFKOI\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 19/5/2023\|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)

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 740	2016	wscript.exe	29
PID 2016 wrote to memory of 740	2016	wscript.exe	29
PID 2016 wrote to memory of 740	2016	wscript.exe	29

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy WMI provider
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Spec00301.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\Spec00301.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:740

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

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\Spec00301.js

Filesize
1.1MB

MD5
2640b5851d4ff75bfc5c3ddf9cea67c7

SHA1
377210fc1a662564fc2c88e0ee974b992bd396eb

SHA256
51dd8819906a735ebf6cc646da4d4ed23937e66b39a55b0dca5b01e7a0ce3f6d

SHA512
35ac8196a02b9e1a70cb8cc144b668f38eea87ba5645d102f384e7888423304108fe40d0b762e51d813cf1dbfbec1554c4dd1ef08f89718e17de6bc2a8821615

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Spec00301.js

Filesize
1.1MB

MD5
2640b5851d4ff75bfc5c3ddf9cea67c7

SHA1
377210fc1a662564fc2c88e0ee974b992bd396eb

SHA256
51dd8819906a735ebf6cc646da4d4ed23937e66b39a55b0dca5b01e7a0ce3f6d

SHA512
35ac8196a02b9e1a70cb8cc144b668f38eea87ba5645d102f384e7888423304108fe40d0b762e51d813cf1dbfbec1554c4dd1ef08f89718e17de6bc2a8821615

Download Submit
C:\Users\Admin\AppData\Roaming\Spec00301.js

Filesize
1.1MB

MD5
2640b5851d4ff75bfc5c3ddf9cea67c7

SHA1
377210fc1a662564fc2c88e0ee974b992bd396eb

SHA256
51dd8819906a735ebf6cc646da4d4ed23937e66b39a55b0dca5b01e7a0ce3f6d

SHA512
35ac8196a02b9e1a70cb8cc144b668f38eea87ba5645d102f384e7888423304108fe40d0b762e51d813cf1dbfbec1554c4dd1ef08f89718e17de6bc2a8821615

Download Submit
C:\Users\Admin\AppData\Roaming\wshsdk.zip

Filesize
12.4MB

MD5
d9a63dfd8b73629421bb44bcde09f312

SHA1
7855575c12eaee0e734f3901ca1da2931e9b587a

SHA256
9d5bb028794410fda9d1b3e0f8deb6beee5bd4e1e55340bd375a209c81dc98eb

SHA512
df195c22f7818569cc92e995846ab507caa30f341ac902cc8afe6f06ae4493709e7f80357c91cf14b21e58e2154e0b35f2154d8a313bf36fcff0b72b3a539cf8

Download Submit
C:\Users\Admin\AppData\Roaming\wshsdk\Lib\SITE-P~1\adodbapi\test\is64bit.py

Filesize
1KB

MD5
ca2cc8e73bbca371935bbc92ed18d567

SHA1
1adb458919e842cd78c72b1ff00e5e93cb6ef75e

SHA256
bea3f797921992fda45c19db41e10e3b325bcdd3ea35d35c1fa70535477ad9c1

SHA512
b63df3bad9272f45ba0f50e2c50aaed7a04eb1b000d5855d9f3a8e5c5f2d381c667b1e9c1e1f03f80584a7941a96992838664ae9dd25e1b8320e026da35b8223

Download Submit

Analysis

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