vjw0rm | a858b2b8b4be7cb23e0a7d37a0c08489a6820cb1be5523a7a466014eb994391f

Analysis

max time kernel
147s
max time network
171s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
31-03-2023 16:01

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General

Target

$RECYCLE.BIN/$RCMX6RL.js
Size

30KB
MD5

5755b6a40493ddbef7a340f21189a16c
SHA1

88a3c0693ec96eb4cbdbd1bdeece2519cdadb5b5
SHA256

476eed72d60eff3ae7cec8fe621e38cd12131c567501f0e7b7688b8618800bc2
SHA512

107c48d26e7e64acc987bf49871780e7ac29c577c495a5d804f45cd5a1ef14b80917d5e55b3e9b41ba769e5fa77d1aada9bc80d1dc33c88e0717e4389c53746f
SSDEEP

768:HUYnBbm0aifjNfwp1nXFCfIaf9fgyQ7buighAZK:9zamq1n1Cwaf9gbuIZK

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://demon666.duckdns.org:9011

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
Blocklisted process makes network request 1 IoCs

Processes:

wscript.exe

flow pid process

9 5104 wscript.exe

flow	pid	process
9	5104	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-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 3 IoCs

Processes:

wscript.exewscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$RCMX6RL.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\OyfYmewQFR.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\OyfYmewQFR.js	wscript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WQ38R62NDG = "\"C:\\Users\\Admin\\AppData\\Roaming\\$RCMX6RL.js\""	wscript.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 5104 wrote to memory of 1684	5104	wscript.exe	wscript.exe
PID 5104 wrote to memory of 1684	5104	wscript.exe	wscript.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\$RECYCLE.BIN\$RCMX6RL.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:5104

C:\Windows\System32\wscript.exe
"C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\OyfYmewQFR.js"
2⤵
- Drops startup file
PID:1684

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\OyfYmewQFR.js
Filesize
10KB

MD5
c34487a0360e4c414e536f15289cc26b

SHA1
16e4ee131c22aa2a4e37a518ed9bc9da4c01b238

SHA256
2de9986d593e85a018c4b83a4e42fc93af26b55190277a2232dca2fa43214ff0

SHA512
0697f603cd78e4d0c78f5ba18f428ab4d189f9dfff7cef22b04b8ab5a9509d99dcbce7d3bb339744ccb61c3b5d25139e7b5448cbe5d1ee4f62de90e87cf3ccd5

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