wshrat | 759f0dc6c4d8fc56acb43050c51682340d083787a87e9aff6039e1741bcf4205

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
14-04-2023 06:14

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General

Target

PURCHASE_ORDER_2304A.vbs
Size

416KB
MD5

fb16657ee3733e01e80549f41ec5d488
SHA1

2a9ecb8808577e673ce20899d71d50ae7ecd9c5b
SHA256

759f0dc6c4d8fc56acb43050c51682340d083787a87e9aff6039e1741bcf4205
SHA512

65bf672a8f40cfc75b00e71ded566bd46ebe06a649d6eaf232e9d3ca5323b30d036233974e0a56c6f2ec2c6c106b93c13fa36ac66a7da18879c92e2544f0382f
SSDEEP

768:TXG/Kiu/R/+6a5pdoEz41EN43HX3RYPi5AEvrpE4EiXd9bJRHG:11+D

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	1516	WScript.exe
5	1516	WScript.exe
6	1516	WScript.exe
9	1516	WScript.exe
10	1516	WScript.exe
11	1516	WScript.exe
13	1516	WScript.exe
14	1516	WScript.exe
15	1516	WScript.exe
17	1516	WScript.exe
18	1516	WScript.exe
19	1516	WScript.exe
21	1516	WScript.exe
22	1516	WScript.exe
23	1516	WScript.exe
25	1516	WScript.exe
26	1516	WScript.exe
27	1516	WScript.exe
31	1516	WScript.exe
32	1516	WScript.exe
33	1516	WScript.exe
35	1516	WScript.exe
36	1516	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_2304A.vbs	WScript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PURCHASE_ORDER_2304A.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_2304A = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\PURCHASE_ORDER_2304A.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_2304A = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\PURCHASE_ORDER_2304A.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_2304A.vbs"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:1516

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PURCHASE_ORDER_2304A.vbs

Filesize
416KB

MD5
fb16657ee3733e01e80549f41ec5d488

SHA1
2a9ecb8808577e673ce20899d71d50ae7ecd9c5b

SHA256
759f0dc6c4d8fc56acb43050c51682340d083787a87e9aff6039e1741bcf4205

SHA512
65bf672a8f40cfc75b00e71ded566bd46ebe06a649d6eaf232e9d3ca5323b30d036233974e0a56c6f2ec2c6c106b93c13fa36ac66a7da18879c92e2544f0382f

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