vjw0rm | d625b68606f5221ef6893109ebd3682ddef07dbdb120688fc1626305aeb1ff6a

Analysis

max time kernel
115s
max time network
122s
platform
windows10_x64
resource
win10-en-20211104
submitted
05/11/2021, 15:24

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General

Target
_UE00S80.JS
Size 13KB
Sample211105-sthd4scbc2
SHA256 8af76d1916ebc77d52162659733ff74656dfa8955fc0d60e92dc1fb9a86c29fa
MD5 8683ce7e2e7126ac6e0fc21e85a2ab19
SHA1 cdc1b5d86f240947f305ce8b3b63034250cb730c
SHA512 5233f2f55356d00a776f2e067a0d5912ad99fc3016a7ff8cec4cf35ed3f3242251ed0d39dcc2d14928f32f22a0a00935049675a9e15488d9e8c627bd7b799530
MD5 SHA1 SHA512

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://194.156.90.26:8012

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm

Blocklisted process makes network request 1 IoCs

flow	pid	Process
10	3128	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\_UE00S80.JS	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\_UE00S80.JS	WScript.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Windows\CurrentVersion\Run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Windows\CurrentVersion\Run\MO5SWUOPWO = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\_UE00S80.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

pid	Process
1284	schtasks.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3128 wrote to memory of 1284	3128	WScript.exe	69
PID 3128 wrote to memory of 1284	3128	WScript.exe	69

C:\Windows\System32\WScript.exe
C:\Windows\System32\WScript.exe "C:\Users\Admin\AppData\Local\Temp\_UE00S80.JS"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3128
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Local\Temp\_UE00S80.JS
  2⤵
  - Creates scheduled task(s)
  PID:1284

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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