wshrat | a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5

Analysis

max time kernel
138s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
01-05-2024 01:51

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General

Target

a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5.vbs
Size

162KB
MD5

4c75fc967ca796d4f8da4128b7bebf70
SHA1

8211cb066cda8aa6cfd62d39b6ccd45254d68916
SHA256

a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5
SHA512

5d440d6b5ced3b364c2a1cd7380cdc89d2d5d8220bcb504ab1f2f1b66e0a0c42dfac02a22f3ba041b4a6faf58d5810817759943b49566b0e362d200dd9cb55c1
SSDEEP

3072:tvHpcPqzeEihOHbeM8fTSrnSRFHJnB/nRT/PRoFPAeRoFeO3RMpY:t6PqzeEiheeM8fTSrnSRFHxBvRjRoFPa

Score

10^/10

wshrat persistence trojan

Malware Config

Signatures

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

WSHRAT payload 1 IoCs

resource	yara_rule
behavioral2/files/0x00130000000239f0-8.dat	family_wshrat

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-1-5-21-2860750803-256193626-1801997576-1000\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\a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5.vbs	WScript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2860750803-256193626-1801997576-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5.vbs\""	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5.vbs\""	WScript.exe

Looks up external IP address via web service 8 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
15	ip-api.com
20	ip-api.com
22	ip-api.com
24	ip-api.com
26	ip-api.com
28	ip-api.com
30	ip-api.com
5	ip-api.com

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-1-5-21-2860750803-256193626-1801997576-1000_Classes\Local Settings	WScript.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4472 wrote to memory of 5028	4472	WScript.exe	86
PID 4472 wrote to memory of 5028	4472	WScript.exe	86

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5.vbs"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4472
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\logger.js"
  2⤵
  PID:5028

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\logger.js

Filesize
8KB

MD5
ae6f781865c0c33163bbd1bb291c9fff

SHA1
d1c14e216591588c1b5f0d7f62264c0cd7e235a4

SHA256
4b77eac5f82019f3d6bb66fa513a78a65fb0186580e582389f5fcfd337298352

SHA512
42a802f0a425b618a8d80924057d666a5a45683b597d26bd3664c6b3535132e0b51461f49a49275fe952ac1f7051086a0b67627e6c0425a0396f11f6dc4c5810

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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5.vbs

Filesize
162KB

MD5
4c75fc967ca796d4f8da4128b7bebf70

SHA1
8211cb066cda8aa6cfd62d39b6ccd45254d68916

SHA256
a4dd485c93929dbeb0e6fd056e60aba8211005c76e97c581fc87875b6e3703c5

SHA512
5d440d6b5ced3b364c2a1cd7380cdc89d2d5d8220bcb504ab1f2f1b66e0a0c42dfac02a22f3ba041b4a6faf58d5810817759943b49566b0e362d200dd9cb55c1

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads