wshrat | 30d07a517dd533db174117c6d59cc0931ba9c4e413984906a6f1ac644850482a

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
11-04-2023 01:50

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General

Target

Purchase_Order.vbs
Size

260KB
MD5

2ff3bce5c3e24a9a66ed42b49c3da68d
SHA1

ca5506d9d30e0690d3cc023fafd524e09145ae83
SHA256

7287f5e59370b51b2fa62b837ef11e5b7c37703151227c2fee01feaf04836fce
SHA512

675956065410bc169900d5b2f7e5cc93c3499c222e3bb4cf83a578413a66fb9fdc0dad3f0af2a8fcefddcf178d6709f8e6efedea8a4bd6e25337026172706b85
SSDEEP

768:Uwh+I+2b4WelZTvQYeXbxbYvEl2C9v0s0kdj57L3bK:Uwq7

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 23 IoCs

flow	pid	Process
4	1060	WScript.exe
5	1060	WScript.exe
6	1060	WScript.exe
8	1060	WScript.exe
10	1060	WScript.exe
11	1060	WScript.exe
13	1060	WScript.exe
14	1060	WScript.exe
15	1060	WScript.exe
17	1060	WScript.exe
18	1060	WScript.exe
19	1060	WScript.exe
21	1060	WScript.exe
22	1060	WScript.exe
23	1060	WScript.exe
25	1060	WScript.exe
26	1060	WScript.exe
27	1060	WScript.exe
29	1060	WScript.exe
30	1060	WScript.exe
31	1060	WScript.exe
33	1060	WScript.exe
34	1060	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\Purchase_Order.vbs	WScript.exe
File created	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-1-5-21-1283023626-844874658-3193756055-1000\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\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:1060

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

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Purchase_Order.vbs

Filesize
260KB

MD5
2ff3bce5c3e24a9a66ed42b49c3da68d

SHA1
ca5506d9d30e0690d3cc023fafd524e09145ae83

SHA256
7287f5e59370b51b2fa62b837ef11e5b7c37703151227c2fee01feaf04836fce

SHA512
675956065410bc169900d5b2f7e5cc93c3499c222e3bb4cf83a578413a66fb9fdc0dad3f0af2a8fcefddcf178d6709f8e6efedea8a4bd6e25337026172706b85

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