vjw0rm | 25fa1b8dca724a1c9e059e76ae2654ad249242f8b8c82358b4041061028bc80d

Analysis

max time kernel
122s
max time network
165s
platform
windows7_x64
resource
win7-en-20210920
submitted
29-10-2021 05:12

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General

Target

v1m5_Payment_receipt.js
Size

81KB
MD5

141b981a8468e109d39c54a3a425ff66
SHA1

92878aa2adea4c26dc639e60a3d9c0f76e536407
SHA256

25fa1b8dca724a1c9e059e76ae2654ad249242f8b8c82358b4041061028bc80d
SHA512

a5284bee064ad956244232baa6fe5a5084bdc2699209a8a1c5bc618e831bc20a2a91df5f65ba23d5dee92d47691797a8fade162d53434fd1e608fc2cc9fd21ff

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://7300js.duckdns.org:7300

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

5 1140 wscript.exe

flow	pid	process
5	1140	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\v1m5_Payment_receipt.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\v1m5_Payment_receipt.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-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run\O8A8WRK7AC = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\v1m5_Payment_receipt.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
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

808 schtasks.exe

pid	process
808	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1140 wrote to memory of 808	1140	wscript.exe	schtasks.exe
PID 1140 wrote to memory of 808	1140	wscript.exe	schtasks.exe
PID 1140 wrote to memory of 808	1140	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\v1m5_Payment_receipt.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1140

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\v1m5_Payment_receipt.js
2⤵
- Creates scheduled task(s)
PID:808

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/808-55-0x0000000000000000-mapping.dmp

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memory/1140-54-0x000007FEFB7B1000-0x000007FEFB7B3000-memory.dmp

Filesize
8KB

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