wshrat | 9ff895ca38e2eb401146ca815c8e1cc91bf4dde21e069dbe41603aed7cb5f0bd

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
10-03-2023 01:42

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General

Target

a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7.vbs
Size

267KB
MD5

a4876007d9afb92163ed9933656eacbd
SHA1

8eafbf2887bb39ac089c95b50bf34fd27b7ee36f
SHA256

a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7
SHA512

8db4e28e3e1718416c1a3dfe7d461efd429345621f30bfe2f3b67532e2c26833a53b57a89cd4b3587488bf017926076b12b92ec15e1868babe5ded766cfa335c
SSDEEP

768:NGiZmuiZO+YlWGNOHGxOrBr/kXiFs6d3f9GdsGd+9dP1EC4SV5BW:l

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	1400	WScript.exe
5	1400	WScript.exe
6	1400	WScript.exe
8	1400	WScript.exe
10	1400	WScript.exe
11	1400	WScript.exe
13	1400	WScript.exe
14	1400	WScript.exe
15	1400	WScript.exe
17	1400	WScript.exe
18	1400	WScript.exe
19	1400	WScript.exe
21	1400	WScript.exe
22	1400	WScript.exe
23	1400	WScript.exe
25	1400	WScript.exe
26	1400	WScript.exe
27	1400	WScript.exe
29	1400	WScript.exe
30	1400	WScript.exe
31	1400	WScript.exe
33	1400	WScript.exe
34	1400	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7.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-1-5-21-3499517378-2376672570-1134980332-1000\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3499517378-2376672570-1134980332-1000\Software\Microsoft\Windows\CurrentVersion\Run\a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7.vbs\""	WScript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7.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\a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7.vbs"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:1400

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\a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7.vbs

Filesize
267KB

MD5
a4876007d9afb92163ed9933656eacbd

SHA1
8eafbf2887bb39ac089c95b50bf34fd27b7ee36f

SHA256
a58c4155a01aab820977ec8d2880edc9408b320f54ec7089db79e50da1b525a7

SHA512
8db4e28e3e1718416c1a3dfe7d461efd429345621f30bfe2f3b67532e2c26833a53b57a89cd4b3587488bf017926076b12b92ec15e1868babe5ded766cfa335c

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