wshrat | 25b4135b1c971889bcf7b36da063ea24025e2a67e22b3dd84ebb8f556b75823e

Analysis

max time kernel
157s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
23-03-2024 18:53

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General

Target

invoice.vbs
Size

19KB
MD5

433febbbc8e5d0eeed7b3aaa9ad15558
SHA1

83905f45e2c6977f35e7db522052295d739fd667
SHA256

25b4135b1c971889bcf7b36da063ea24025e2a67e22b3dd84ebb8f556b75823e
SHA512

6cae2f6e7b86052af6f812e815128f67ce76f44e56b9bfdb5e4fa0ce2fba5610deb830334162b330e5e494bece380d1f7e053f6f89eac398d48fe49cbb3626ec
SSDEEP

384:vKNssJiGagRYwZSFFOECXCghDStXdTX2XXXiXs31TNWE/cJ1:vq9agRYwZSGECXCgM7rGHqc1IE/m

Score

10^/10

wshrat persistence trojan

Malware Config

Extracted

Family

wshrat

http://paulrdp02.duckdns.org:1604

Signatures

WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

Blocklisted process makes network request 27 IoCs

Processes:

wscript.exe

flow	pid	process
11	748	wscript.exe
40	748	wscript.exe
43	748	wscript.exe
48	748	wscript.exe
61	748	wscript.exe
63	748	wscript.exe
76	748	wscript.exe
77	748	wscript.exe
78	748	wscript.exe
79	748	wscript.exe
80	748	wscript.exe
84	748	wscript.exe
87	748	wscript.exe
88	748	wscript.exe
91	748	wscript.exe
92	748	wscript.exe
93	748	wscript.exe
94	748	wscript.exe
95	748	wscript.exe
96	748	wscript.exe
97	748	wscript.exe
98	748	wscript.exe
102	748	wscript.exe
103	748	wscript.exe
107	748	wscript.exe
109	748	wscript.exe
110	748	wscript.exe

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

WScript.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation WScript.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 2 IoCs

Processes:

WScript.exewscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\invoice.vbs	wscript.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

wscript.exeWScript.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\invoice = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\invoice.vbs\""	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\invoice = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\invoice.vbs\""	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\invoice = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\invoice.vbs\""	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\invoice = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\invoice.vbs\""	WScript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

WScript.exe

description pid process target process

PID 924 wrote to memory of 748 924 WScript.exe wscript.exe
PID 924 wrote to memory of 748 924 WScript.exe wscript.exe

description	pid	process	target process
PID 924 wrote to memory of 748	924	WScript.exe	wscript.exe
PID 924 wrote to memory of 748	924	WScript.exe	wscript.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\invoice.vbs"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:924

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\invoice.vbs"
2⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:748

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\invoice.vbs
Filesize
19KB

MD5
433febbbc8e5d0eeed7b3aaa9ad15558

SHA1
83905f45e2c6977f35e7db522052295d739fd667

SHA256
25b4135b1c971889bcf7b36da063ea24025e2a67e22b3dd84ebb8f556b75823e

SHA512
6cae2f6e7b86052af6f812e815128f67ce76f44e56b9bfdb5e4fa0ce2fba5610deb830334162b330e5e494bece380d1f7e053f6f89eac398d48fe49cbb3626ec

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