wshrat | 5a6374adb1371c63cace395445818f4b83dcdd2494da86062b0ab3cbfb201e0b

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2023, 14:05

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General

Target
rORDER-023603_List.xls.vbs
Size 9KB
Sample230604-rdt8ascd38
SHA256 5a6374adb1371c63cace395445818f4b83dcdd2494da86062b0ab3cbfb201e0b
MD5 b66938f8b8ab81aef4aceeea87bbe7b5
SHA1 2f140f44c2f74ecff2e24dcb0b3fbd72080e090a
SHA512 0f449d44022e9abec453180dae1f25e06fb538359c6cc52f3eb6efafb9b339f293f733284c73ac2b793fac97aee92df01eeed524c361ac0f7c35664a97dfd0bc
SSDEEP 48:bnlrCVFFIlV2rVboysaqbwYHppKZ2I0wiin5I2c1YleGE/+:jlrCnFSmzs/3IKin5I2c1Yle9m
MD5 SHA1 SHA512 SSDEEP

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 26 IoCs

flow	pid	Process
4	4832	WScript.exe
9	4832	WScript.exe
11	4832	WScript.exe
27	1740	WScript.exe
36	1740	WScript.exe
38	1740	WScript.exe
39	1740	WScript.exe
41	1740	WScript.exe
46	1740	WScript.exe
47	1740	WScript.exe
48	1740	WScript.exe
49	1740	WScript.exe
51	1740	WScript.exe
52	1740	WScript.exe
53	1740	WScript.exe
54	1740	WScript.exe
56	1740	WScript.exe
57	1740	WScript.exe
58	1740	WScript.exe
60	1740	WScript.exe
61	1740	WScript.exe
62	1740	WScript.exe
63	1740	WScript.exe
65	1740	WScript.exe
66	1740	WScript.exe
67	1740	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\GHMIYQ.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\GHMIYQ.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-1-5-21-4238149048-355649189-894321705-1000\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GHMIYQ = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\GHMIYQ.vbs\""	WScript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GHMIYQ = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\GHMIYQ.vbs\""	WScript.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4238149048-355649189-894321705-1000_Classes\Local Settings	WScript.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4832 wrote to memory of 1740	4832	WScript.exe	84
PID 4832 wrote to memory of 1740	4832	WScript.exe	84

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\rORDER-023603_List.xls.vbs"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4832
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\GHMIYQ.vbs"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:1740

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

GHMIYQ.vbs

Path C:\Users\Admin\AppData\Local\Temp\GHMIYQ.vbs
Size 238KB
SHA256 cde3243e5d239396688c6a7bac14a6baf46e60a242fe4788c063ccb3bf0a0e49
MD5 9e6396c0f6372ad9dabf49ac46c37b19
SHA1 532916ba3e0eb3e75bba96e46c10f28732f800cc
SHA512 8fed54f8f61bf40f65689838782b59e4240f644841cf1f3667cf95789c75430c2143cc913493188d948e9c3a441251b702583380a80b9096904c91997c40a95f
SSDEEP 768:mCkMaJJTyA0j3jaxA2ZtJhydL5aM1aU9FqjkNblex89OgpzXAgAEFVpFtdFa:MZ
MD5 SHA1 SHA512 SSDEEP

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