vjw0rm | ccf62720b856ac64a61f9e1266bf401054738fdd309a57d13787f43dd410a608

Analysis

max time kernel
150s
max time network
152s
platform
windows10_x64
resource
win10v20210408
submitted
29-09-2021 15:43

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General

Target

#00971.js
Size

9KB
MD5

fd8a5b4a046af44f3523c7ad813c1359
SHA1

ab2f505db0516fe75dead0010db6f7d30b1f6d84
SHA256

ccf62720b856ac64a61f9e1266bf401054738fdd309a57d13787f43dd410a608
SHA512

31ee8b1152db19d9b960302a480dd032f99982ea49085c717cc996c36f902676f86a64a6a560a1f89e2c9f26d7d4a0e62bba90ebe0c399a65e4be685faced06d

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

2 1400 wscript.exe

flow	pid	process
2	1400	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\#00971.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\#00971.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-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\MGIVKRKXXP = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\#00971.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

1816 schtasks.exe

pid	process
1816	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 1400 wrote to memory of 1816	1400	wscript.exe	schtasks.exe
PID 1400 wrote to memory of 1816	1400	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\#00971.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1400

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\#00971.js
2⤵
- Creates scheduled task(s)
PID:1816

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/1816-114-0x0000000000000000-mapping.dmp

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