vjw0rm | a2cbfdcfc29291460269481e1fbb5084ac7d96bd51e8c8e2d1973d6a17faf9e1

General

Target

F51N3M18A6S.js
Size

81KB
MD5

e600ddc9272ed25bbf4291460be628d9
SHA1

e85a57ab41b248887d8dd55bb41c41b12a9da15c
SHA256

a2cbfdcfc29291460269481e1fbb5084ac7d96bd51e8c8e2d1973d6a17faf9e1
SHA512

cf3d5d24d72da30def5081b6ebff68d8fbc8feee7fa96d1594daaf98563909c2e0379a2011e3a29ddffee0e5e4724d873f6265d6707f7b208bf7167d77f37ed9

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 18 IoCs

Processes:

wscript.exe

flow	pid	process
8	1080	wscript.exe
9	1080	wscript.exe
10	1080	wscript.exe
12	1080	wscript.exe
13	1080	wscript.exe
14	1080	wscript.exe
16	1080	wscript.exe
17	1080	wscript.exe
18	1080	wscript.exe
20	1080	wscript.exe
21	1080	wscript.exe
22	1080	wscript.exe
24	1080	wscript.exe
25	1080	wscript.exe
26	1080	wscript.exe
28	1080	wscript.exe
29	1080	wscript.exe
30	1080	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\F51N3M18A6S.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\F51N3M18A6S.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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\RZJR7TBG32 = "'C:\\Users\\Admin\\AppData\\Local\\Temp\\F51N3M18A6S.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

1784 schtasks.exe

pid	process
1784	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1080 wrote to memory of 1784	1080	wscript.exe	schtasks.exe
PID 1080 wrote to memory of 1784	1080	wscript.exe	schtasks.exe
PID 1080 wrote to memory of 1784	1080	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\F51N3M18A6S.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1080

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr 'C:\Users\Admin\AppData\Local\Temp\F51N3M18A6S.js
2⤵
- Creates scheduled task(s)
PID:1784

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

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

memory/1080-60-0x000007FEFBAA1000-0x000007FEFBAA3000-memory.dmp

Filesize
8KB

Download
memory/1784-61-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads