vjw0rm | 0b471b1080ff4600483e4459e88aae2bb54f4ba84416b614d58f72bfa24b35a9

Analysis

max time kernel
141s
max time network
191s
platform
windows7_x64
resource
win7v20210408
submitted
16-06-2021 09:58

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General

Target

Invoice #3381.js
Size

3KB
MD5

abb769d734f8212d96ea432da12cbc15
SHA1

186d2abc93687bfa9036319641b7fa6f3245b798
SHA256

0b471b1080ff4600483e4459e88aae2bb54f4ba84416b614d58f72bfa24b35a9
SHA512

308e2ecadeeea21e46fa2eacfa71dd46323bcd00391d4d92030ae9775d0c8497098bfd14423d0c2e53b85f3420da5f5a069c79dbf23e103f45441bea236f37ff

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 1 IoCs

Processes:

wscript.exe

flow pid process

6 1092 wscript.exe

flow	pid	process
6	1092	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Invoice #3381.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Invoice #3381.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\EX2WNAPNLF = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Invoice #3381.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

1248 schtasks.exe

pid	process
1248	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1092 wrote to memory of 1248	1092	wscript.exe	schtasks.exe
PID 1092 wrote to memory of 1248	1092	wscript.exe	schtasks.exe
PID 1092 wrote to memory of 1248	1092	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\Invoice #3381.js"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1092

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Invoice #3381.js
2⤵
- Creates scheduled task(s)
PID:1248

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

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Downloads

memory/1248-60-0x0000000000000000-mapping.dmp

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