wshrat | 3e922156cad894b1d7cfe17e02e90fe0b2c97d7fc8db93b3fde190ddd20a41ad

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
06-04-2023 18:39

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General

Target

Quotation_230406A.vbs
Size

271KB
MD5

26dd4d56ebc911f4088bff1a4ba6d90d
SHA1

81be8f4ad3eb8061da6722a8e69c4ca67c0c1a66
SHA256

a3d0cbb2060021757f2514e9f190b1ac4d7d0ec79bc91351ed7a794ba05cab0a
SHA512

2cb54bd272b2238a2168828e69c39e0c9ed9017690f08130927a71aa89e638419cce3d63e8e582ec151414c8c6bc94a56b2d5e937a56df182914e8ac6e0b3f59
SSDEEP

768:DQsieR2wEfnsuuhjdVex8HWqHBACAaDHfj5BjW:wl

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 21 IoCs

flow	pid	Process
4	748	WScript.exe
5	748	WScript.exe
7	748	WScript.exe
9	748	WScript.exe
10	748	WScript.exe
11	748	WScript.exe
13	748	WScript.exe
14	748	WScript.exe
15	748	WScript.exe
17	748	WScript.exe
18	748	WScript.exe
19	748	WScript.exe
21	748	WScript.exe
22	748	WScript.exe
23	748	WScript.exe
25	748	WScript.exe
26	748	WScript.exe
27	748	WScript.exe
29	748	WScript.exe
30	748	WScript.exe
31	748	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Quotation_230406A.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Quotation_230406A.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-1-5-21-1563773381-2037468142-1146002597-1000\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run\Quotation_230406A = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Quotation_230406A.vbs\""	WScript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Quotation_230406A = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Quotation_230406A.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\Quotation_230406A.vbs"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:748

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\Quotation_230406A.vbs

Filesize
271KB

MD5
26dd4d56ebc911f4088bff1a4ba6d90d

SHA1
81be8f4ad3eb8061da6722a8e69c4ca67c0c1a66

SHA256
a3d0cbb2060021757f2514e9f190b1ac4d7d0ec79bc91351ed7a794ba05cab0a

SHA512
2cb54bd272b2238a2168828e69c39e0c9ed9017690f08130927a71aa89e638419cce3d63e8e582ec151414c8c6bc94a56b2d5e937a56df182914e8ac6e0b3f59

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