vjw0rm | 73b2e38a3dcf49abe626541ba88c22d45b00fef21c6536f083b24c611739e397

Analysis

max time kernel
140s
max time network
143s
platform
windows7_x64
resource
win7-en-20210920
submitted
21-10-2021 18:19

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General

Target

B00S_Invoice_Copy.js
Size

10KB
MD5

2f82007c9b5d792e69074e710221b1f6
SHA1

89f48914102c6cff10013150d8f79c31b3b7315b
SHA256

73b2e38a3dcf49abe626541ba88c22d45b00fef21c6536f083b24c611739e397
SHA512

53dff7fda8e270743ec91cff1876dce4490c2e4b33977abe58a9a987a214f77107e03f0f6582da2b82e20556ba0535cad8b503bca6ab8944c0ebff2ecd8a5d45

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://mchristopherr83.duckdns.org:7922

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 1612 wscript.exe

flow	pid	process
5	1612	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\B00S_Invoice_Copy.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\B00S_Invoice_Copy.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
Set value (str)	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run\JX0T7EQ31M = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\B00S_Invoice_Copy.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run	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

696 schtasks.exe

pid	process
696	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1612 wrote to memory of 696	1612	wscript.exe	schtasks.exe
PID 1612 wrote to memory of 696	1612	wscript.exe	schtasks.exe
PID 1612 wrote to memory of 696	1612	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\B00S_Invoice_Copy.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1612

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\B00S_Invoice_Copy.js
2⤵
- Creates scheduled task(s)
PID:696

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/696-54-0x0000000000000000-mapping.dmp

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