wshrat | 0953de8a253fe24fc1a889c903f246a455daf9d5f608931fecbf07bc6f9690cc

General

Target

05162023.js
Size

992KB
MD5

261c683cdd89ac3ca4bbbd2fd7293c7f
SHA1

9bf5f09bfb3260d4fea80896c3bb1b3354cb714f
SHA256

0953de8a253fe24fc1a889c903f246a455daf9d5f608931fecbf07bc6f9690cc
SHA512

f517e598e7b73cf2bf828ca1ef8e181dd6950bc41126f04fc768e6137bd4debbb169c9e5544968d395c3d50441e721b64b1b4f6789520058afa686bc409a80b7
SSDEEP

3072:y87FJ6J9iYlueZkFrOdvQzU6FOoctj06BTZf4pcLYnGMhfWVbCh3:y87FJ6J9iYlueZkFrq06ff4pH0gh3

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	1496	wscript.exe
3	324	wscript.exe
7	324	wscript.exe
8	324	wscript.exe
9	324	wscript.exe
10	324	wscript.exe
12	324	wscript.exe
14	324	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\05162023.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\05162023.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\05162023 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\05162023.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows\CurrentVersion\Run\05162023 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\05162023.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\05162023 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\05162023.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Software\Microsoft\Windows\CurrentVersion\Run\05162023 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\05162023.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\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	9	WSHRAT\|706EFC06\|TMRJMUQF\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 19/5/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	10	WSHRAT\|706EFC06\|TMRJMUQF\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 19/5/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	12	WSHRAT\|706EFC06\|TMRJMUQF\|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)
HTTP User-Agent header	8	WSHRAT\|706EFC06\|TMRJMUQF\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 19/5/2023\|JavaScript-v3.4\|IN:India

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1496 wrote to memory of 324	1496	wscript.exe	28
PID 1496 wrote to memory of 324	1496	wscript.exe	28
PID 1496 wrote to memory of 324	1496	wscript.exe	28

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\05162023.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\05162023.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:324

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\05162023.js

Filesize
992KB

MD5
261c683cdd89ac3ca4bbbd2fd7293c7f

SHA1
9bf5f09bfb3260d4fea80896c3bb1b3354cb714f

SHA256
0953de8a253fe24fc1a889c903f246a455daf9d5f608931fecbf07bc6f9690cc

SHA512
f517e598e7b73cf2bf828ca1ef8e181dd6950bc41126f04fc768e6137bd4debbb169c9e5544968d395c3d50441e721b64b1b4f6789520058afa686bc409a80b7

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\05162023.js

Filesize
992KB

MD5
261c683cdd89ac3ca4bbbd2fd7293c7f

SHA1
9bf5f09bfb3260d4fea80896c3bb1b3354cb714f

SHA256
0953de8a253fe24fc1a889c903f246a455daf9d5f608931fecbf07bc6f9690cc

SHA512
f517e598e7b73cf2bf828ca1ef8e181dd6950bc41126f04fc768e6137bd4debbb169c9e5544968d395c3d50441e721b64b1b4f6789520058afa686bc409a80b7

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\05162023.js

Filesize
992KB

MD5
261c683cdd89ac3ca4bbbd2fd7293c7f

SHA1
9bf5f09bfb3260d4fea80896c3bb1b3354cb714f

SHA256
0953de8a253fe24fc1a889c903f246a455daf9d5f608931fecbf07bc6f9690cc

SHA512
f517e598e7b73cf2bf828ca1ef8e181dd6950bc41126f04fc768e6137bd4debbb169c9e5544968d395c3d50441e721b64b1b4f6789520058afa686bc409a80b7

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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