wshrat | 65043e29aee119453c03b9699691225c7301b7cea52fadf5c516cadf3b64bab5

General

Target

8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js
Size

1.3MB
MD5

a2d87864e4ae3f37438382c7059d1db8
SHA1

e9fb58de42c5a06f79f2e5121240134402a6c61c
SHA256

8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140
SHA512

e283e05fb8d43bb1955a47df1ce89834133c45f98b738df775112be8c122cb4d902e637424901ef6cb31d494f834c8bb05cf629743bb2d2e66f4724bca9e8fbf
SSDEEP

6144:m427cWqyvMWQ4jn9SLjCFmKm+GkM27AhrqxV4ENyrWVvBUk/h+N+ZzGwRmwTeXOZ:sP

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	928	wscript.exe
3	268	wscript.exe
7	268	wscript.exe
8	268	wscript.exe
9	268	wscript.exe
10	268	wscript.exe
12	268	wscript.exe
14	268	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.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\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows\CurrentVersion\Run\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows\CurrentVersion\Run\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.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 6 IoCs

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

description	flow	ioc
HTTP User-Agent header	12	WSHRAT\|60D13494\|KXZDHPUW\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 10/3/2023\|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\|60D13494\|KXZDHPUW\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 10/3/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	9	WSHRAT\|60D13494\|KXZDHPUW\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 10/3/2023\|JavaScript-v3.4\|IN:India
HTTP User-Agent header	10	WSHRAT\|60D13494\|KXZDHPUW\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 10/3/2023\|JavaScript-v3.4\|IN:India

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 928 wrote to memory of 268	928	wscript.exe	28
PID 928 wrote to memory of 268	928	wscript.exe	28
PID 928 wrote to memory of 268	928	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\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:928
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:268

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\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js

Filesize
1.3MB

MD5
a2d87864e4ae3f37438382c7059d1db8

SHA1
e9fb58de42c5a06f79f2e5121240134402a6c61c

SHA256
8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140

SHA512
e283e05fb8d43bb1955a47df1ce89834133c45f98b738df775112be8c122cb4d902e637424901ef6cb31d494f834c8bb05cf629743bb2d2e66f4724bca9e8fbf

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js

Filesize
1.3MB

MD5
3733e7289fbee8902277fb212366fd4d

SHA1
a3b5027ebb8638abc6ccb3c4da3c42dc576a18e9

SHA256
aed3dee3bf163982c529b73e8dcc82e83276718e0655178012131218bbab8965

SHA512
a202cd7573f683541e03a64253d609169b92ba5ba0c2aca5a35c14baa49f84846135ab67096e05dcde95eccc89447f61fad395915c0f9d342eee50d860a2cbea

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140.js

Filesize
1.3MB

MD5
a2d87864e4ae3f37438382c7059d1db8

SHA1
e9fb58de42c5a06f79f2e5121240134402a6c61c

SHA256
8238be6c23aee13f83faffb0a2ac1abcb1a698fd87c48aa8f2cd2a36a4a29140

SHA512
e283e05fb8d43bb1955a47df1ce89834133c45f98b738df775112be8c122cb4d902e637424901ef6cb31d494f834c8bb05cf629743bb2d2e66f4724bca9e8fbf

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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