vjw0rm | a858b2b8b4be7cb23e0a7d37a0c08489a6820cb1be5523a7a466014eb994391f

Analysis

max time kernel
150s
max time network
187s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
31-03-2023 16:01

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General

Target

$RECYCLE.BIN/$RCMX6RL.js
Size

30KB
MD5

5755b6a40493ddbef7a340f21189a16c
SHA1

88a3c0693ec96eb4cbdbd1bdeece2519cdadb5b5
SHA256

476eed72d60eff3ae7cec8fe621e38cd12131c567501f0e7b7688b8618800bc2
SHA512

107c48d26e7e64acc987bf49871780e7ac29c577c495a5d804f45cd5a1ef14b80917d5e55b3e9b41ba769e5fa77d1aada9bc80d1dc33c88e0717e4389c53746f
SSDEEP

768:HUYnBbm0aifjNfwp1nXFCfIaf9fgyQ7buighAZK:9zamq1n1Cwaf9gbuIZK

Score

10^/10

vjw0rm persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

http://demon666.duckdns.org:9011

Signatures

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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
9	1148	wscript.exe

Drops startup file 3 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\OyfYmewQFR.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$RCMX6RL.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\OyfYmewQFR.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-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run\WQ38R62NDG = "\"C:\\Users\\Admin\\AppData\\Roaming\\$RCMX6RL.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

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1148 wrote to memory of 1304	1148	wscript.exe	28
PID 1148 wrote to memory of 1304	1148	wscript.exe	28
PID 1148 wrote to memory of 1304	1148	wscript.exe	28

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\$RECYCLE.BIN\$RCMX6RL.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1148
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\OyfYmewQFR.js"
  2⤵
  - Drops startup file
  PID:1304

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\OyfYmewQFR.js

Filesize
10KB

MD5
c34487a0360e4c414e536f15289cc26b

SHA1
16e4ee131c22aa2a4e37a518ed9bc9da4c01b238

SHA256
2de9986d593e85a018c4b83a4e42fc93af26b55190277a2232dca2fa43214ff0

SHA512
0697f603cd78e4d0c78f5ba18f428ab4d189f9dfff7cef22b04b8ab5a9509d99dcbce7d3bb339744ccb61c3b5d25139e7b5448cbe5d1ee4f62de90e87cf3ccd5

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