vjw0rm | 31a22a19a1ef086c201b20f728673fce60815484e2b1be8bacaa878e74a796e1

Analysis

max time kernel
137s
max time network
179s
platform
windows7_x64
resource
win7v20210408
submitted
19-06-2021 09:05

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General

Target

Invoice001.js
Size

9KB
MD5

7ea6e792dbaaaf67e864f7aee557745d
SHA1

d321bc0bb336dec5e2d7ca27e52717a9eaabb59b
SHA256

31a22a19a1ef086c201b20f728673fce60815484e2b1be8bacaa878e74a796e1
SHA512

84bb06242aad130ea33eb146acca226a28c286834c8e798241a91c9ca2943a3601bec128cdcfc1ab2de415e860d8c244361ccae55002d8a5ab238df802d5224b

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

5 1120 wscript.exe

flow	pid	process
5	1120	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\Invoice001.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Invoice001.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\VK4NKWEXF7 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Invoice001.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

1644 schtasks.exe

pid	process
1644	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1120 wrote to memory of 1644	1120	wscript.exe	schtasks.exe
PID 1120 wrote to memory of 1644	1120	wscript.exe	schtasks.exe
PID 1120 wrote to memory of 1644	1120	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Invoice001.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1120

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Invoice001.js
2⤵
- Creates scheduled task(s)
PID:1644

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/1644-60-0x0000000000000000-mapping.dmp

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