wshrat | 98a77976e106ed9d665a7856da1371dd1e6e61cda4dd076cbb6f191c2f1e9ff6

Analysis

max time kernel
146s
max time network
150s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
25-03-2023 17:18

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General

Target

Purchase_Order.vbs
Size

216KB
MD5

286fff39c1b94a7faea3275f7d32abfd
SHA1

fc077b0bcef5f5c694cf913cd69081c5bcf23d82
SHA256

98a77976e106ed9d665a7856da1371dd1e6e61cda4dd076cbb6f191c2f1e9ff6
SHA512

e618504775f2e3a5a294a519d18868531c51822ae4377ec800ad5fb264aaa2c77bbb3e0dfbc3c5f812b6940e6e91131d1616b75239a9dd6f4c7ab4f55df3d2c3
SSDEEP

384:dQiz8VURuMLULOnskUVyxn4eyY/3TmXSqEKk1x3D82nc8OmyGD0a9Yo4V4ShBBqn:18VURFqSXgNMeST

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 20 IoCs

flow	pid	Process
4	1944	WScript.exe
5	1944	WScript.exe
7	1944	WScript.exe
9	1944	WScript.exe
10	1944	WScript.exe
11	1944	WScript.exe
13	1944	WScript.exe
14	1944	WScript.exe
15	1944	WScript.exe
17	1944	WScript.exe
18	1944	WScript.exe
19	1944	WScript.exe
21	1944	WScript.exe
22	1944	WScript.exe
23	1944	WScript.exe
25	1944	WScript.exe
26	1944	WScript.exe
27	1944	WScript.exe
29	1944	WScript.exe
30	1944	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\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
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

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:1944

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
216KB

MD5
286fff39c1b94a7faea3275f7d32abfd

SHA1
fc077b0bcef5f5c694cf913cd69081c5bcf23d82

SHA256
98a77976e106ed9d665a7856da1371dd1e6e61cda4dd076cbb6f191c2f1e9ff6

SHA512
e618504775f2e3a5a294a519d18868531c51822ae4377ec800ad5fb264aaa2c77bbb3e0dfbc3c5f812b6940e6e91131d1616b75239a9dd6f4c7ab4f55df3d2c3

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