wshrat | 8d32af363e9f3720668195f73c5b0f439e77b695ad282efb6bb63b60ff5aed5c

Analysis

max time kernel
146s
max time network
149s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
09/04/2023, 18:26

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General

Target
Purchase_Order.vbs
Size 260KB
Sample230409-w26y8aec3x
SHA256 7287f5e59370b51b2fa62b837ef11e5b7c37703151227c2fee01feaf04836fce
MD5 2ff3bce5c3e24a9a66ed42b49c3da68d
SHA1 ca5506d9d30e0690d3cc023fafd524e09145ae83
SHA512 675956065410bc169900d5b2f7e5cc93c3499c222e3bb4cf83a578413a66fb9fdc0dad3f0af2a8fcefddcf178d6709f8e6efedea8a4bd6e25337026172706b85
SSDEEP 768:Uwh+I+2b4WelZTvQYeXbxbYvEl2C9v0s0kdj57L3bK:Uwq7
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

wshrat persistence trojan

Malware Config

Extracted

Family

wshrat

http://chongmei33.publicvm.com:7045

Signatures

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

Blocklisted process makes network request 22 IoCs

flow	pid	Process
4	832	WScript.exe
5	832	WScript.exe
6	832	WScript.exe
8	832	WScript.exe
10	832	WScript.exe
11	832	WScript.exe
13	832	WScript.exe
14	832	WScript.exe
15	832	WScript.exe
17	832	WScript.exe
18	832	WScript.exe
19	832	WScript.exe
21	832	WScript.exe
22	832	WScript.exe
23	832	WScript.exe
25	832	WScript.exe
26	832	WScript.exe
27	832	WScript.exe
29	832	WScript.exe
30	832	WScript.exe
31	832	WScript.exe
33	832	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Purchase_Order.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Purchase_Order.vbs	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\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run\Purchase_Order = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Purchase_Order.vbs\""	WScript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Purchase_Order = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Purchase_Order.vbs\""	WScript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Purchase_Order.vbs"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:832

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

Purchase_Order.vbs

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Purchase_Order.vbs
Size 260KB
SHA256 7287f5e59370b51b2fa62b837ef11e5b7c37703151227c2fee01feaf04836fce
MD5 2ff3bce5c3e24a9a66ed42b49c3da68d
SHA1 ca5506d9d30e0690d3cc023fafd524e09145ae83
SHA512 675956065410bc169900d5b2f7e5cc93c3499c222e3bb4cf83a578413a66fb9fdc0dad3f0af2a8fcefddcf178d6709f8e6efedea8a4bd6e25337026172706b85
SSDEEP 768:Uwh+I+2b4WelZTvQYeXbxbYvEl2C9v0s0kdj57L3bK:Uwq7
MD5 SHA1 SHA512 SSDEEP

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