vjw0rm | 5491810d64aecff4eb29aa664014704c1cf3687868629ad9156bed5923d5e358

Analysis

max time kernel
123s
max time network
179s
platform
windows7_x64
resource
win7v20210408
submitted
03-06-2021 17:02

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General

Target

D939065332_Invoice.js
Size

3KB
MD5

d4de5dc8ff47ccb10f1465c056da29b7
SHA1

df833e94a7e8613fbbce2b0bb21a0a0176a72371
SHA256

5491810d64aecff4eb29aa664014704c1cf3687868629ad9156bed5923d5e358
SHA512

8c2a199cbb6f86b694805df1af8dfa5c666d3cfd280af7d7a853f15babee3a33efc417669cd2e15b354649b631a22507c97a9bfbc4c89ea92d3fdc461bf8c318

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

5 332 wscript.exe

flow	pid	process
5	332	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\D939065332_Invoice.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\D939065332_Invoice.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\UKRZWF15HK = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\D939065332_Invoice.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

1244 schtasks.exe

pid	process
1244	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 332 wrote to memory of 1244	332	wscript.exe	schtasks.exe
PID 332 wrote to memory of 1244	332	wscript.exe	schtasks.exe
PID 332 wrote to memory of 1244	332	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\D939065332_Invoice.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:332

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\D939065332_Invoice.js
2⤵
- Creates scheduled task(s)
PID:1244

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/1244-59-0x0000000000000000-mapping.dmp

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