vjw0rm | f24f9cffe9e9673cd1dd71a3b2b3f904a7a44bc4d4cc085362450f51e9623a5c

Analysis

max time kernel
148s
max time network
157s
platform
windows7_x64
resource
win7-en-20211208
submitted
08-02-2022 00:39

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General

Target

Voucher_4093.js
Size

9KB
MD5

5232adca452765d2f6f4d552afdc6230
SHA1

f6e0fe80b48f1a5022a864552be66acf42e91091
SHA256

87ac3e5dc3d4a3bf8aba37d4c994d2574187cb21118182d7b25ac167ec421d33
SHA512

bc8c478e5a86733d0101a6a87bf7b1acb870f31dc0df0ef5909a069aa3833b4d6fd124b146b4658686e2a0b932071ea55120147e2736c2a85729a7ac5ee18034

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 5 IoCs

Processes:

wscript.exe

flow pid process

5 268 wscript.exe
6 268 wscript.exe
7 268 wscript.exe
9 268 wscript.exe
10 268 wscript.exe

flow	pid	process
5	268	wscript.exe
6	268	wscript.exe
7	268	wscript.exe
9	268	wscript.exe
10	268	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\Voucher_4093.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Voucher_4093.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-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3846991908-3261386348-1409841751-1000\Software\Microsoft\Windows\CurrentVersion\Run\N0Z2YR4R55 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Voucher_4093.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

892 schtasks.exe

pid	process
892	schtasks.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

wscript.exe

description	pid	process	target process
PID 268 wrote to memory of 892	268	wscript.exe	schtasks.exe
PID 268 wrote to memory of 892	268	wscript.exe	schtasks.exe
PID 268 wrote to memory of 892	268	wscript.exe	schtasks.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Voucher_4093.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:268

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\Voucher_4093.js
2⤵
- Creates scheduled task(s)
PID:892

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/268-54-0x000007FEFB591000-0x000007FEFB593000-memory.dmp

Filesize
8KB

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