wshrat | 25b4135b1c971889bcf7b36da063ea24025e2a67e22b3dd84ebb8f556b75823e

Analysis

max time kernel
148s
max time network
154s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 28 IoCs

Processes:

wscript.exe

flow	pid	process
4	2588	wscript.exe
6	2588	wscript.exe
7	2588	wscript.exe
9	2588	wscript.exe
10	2588	wscript.exe
11	2588	wscript.exe
13	2588	wscript.exe
14	2588	wscript.exe
15	2588	wscript.exe
17	2588	wscript.exe
18	2588	wscript.exe
19	2588	wscript.exe
21	2588	wscript.exe
22	2588	wscript.exe
23	2588	wscript.exe
25	2588	wscript.exe
26	2588	wscript.exe
27	2588	wscript.exe
29	2588	wscript.exe
30	2588	wscript.exe
31	2588	wscript.exe
33	2588	wscript.exe
34	2588	wscript.exe
35	2588	wscript.exe
37	2588	wscript.exe
38	2588	wscript.exe
39	2588	wscript.exe
41	2588	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\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-1-5-21-778096762-2241304387-192235952-1000\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-1-5-21-778096762-2241304387-192235952-1000\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 3 IoCs

Processes:

WScript.exe

description	pid	process	target process
PID 2212 wrote to memory of 2588	2212	WScript.exe	wscript.exe
PID 2212 wrote to memory of 2588	2212	WScript.exe	wscript.exe
PID 2212 wrote to memory of 2588	2212	WScript.exe	wscript.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\invoice.vbs"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2212
- 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:2588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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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