vjw0rm | 21e0026aeb23c03125337151d862a29372ac17af5663fca1f5ff7beeacf82fc1

Analysis

max time kernel
150s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28/01/2024, 23:59

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General

Target
7e58440b8eb773b24aace538de1c5437.js
Size 67KB
Sample240128-31qzyafack
SHA256 21e0026aeb23c03125337151d862a29372ac17af5663fca1f5ff7beeacf82fc1
MD5 7e58440b8eb773b24aace538de1c5437
SHA1 b824cf54e9e9e1c28ff2ec6b6e3de9048750f5cb
SHA512 a3d50e13255253989be68a25304ad51098fdbbe8873269d6fd148cc7ef641639bea881cfb57837182ee0c5036340cdd572706d0ac5552c6be8404404f79db298
SSDEEP 1536:YQ/nup5Ih191nup5Ih19efc//nup5Ih191nup5Ih19efcq6:7Gf9fbfWGf9fbfE
MD5 SHA1 SHA512 SSDEEP

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 12 IoCs

flow	pid	Process
20	4064	wscript.exe
23	4064	wscript.exe
34	4064	wscript.exe
36	4064	wscript.exe
49	4064	wscript.exe
53	4064	wscript.exe
55	4064	wscript.exe
58	4064	wscript.exe
60	4064	wscript.exe
62	4064	wscript.exe
65	4064	wscript.exe
67	4064	wscript.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 4 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rVRpsUBiCR.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\7e58440b8eb773b24aace538de1c5437.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\7e58440b8eb773b24aace538de1c5437.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rVRpsUBiCR.js	wscript.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\0HKX5ALWLG = "\"C:\\Users\\Admin\\AppData\\Roaming\\rVRpsUBiCR.js\""	wscript.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 2012	4064	wscript.exe	85
PID 4064 wrote to memory of 2012	4064	wscript.exe	85

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\7e58440b8eb773b24aace538de1c5437.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:4064
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\rVRpsUBiCR.js"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  PID:2012

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

rVRpsUBiCR.js

Path C:\Users\Admin\AppData\Roaming\rVRpsUBiCR.js
Size 14KB
SHA256 6641f0211253402fa4b39005e29c7e0b688d3722d05746040f6c35b4c14182eb
MD5 ed533885cb7d43829db0e85dbaabec22
SHA1 c19225ec3612ce86d4f5b8046ae65b3332d40776
SHA512 b6420e3c79ebb31b687f1b3f89ee4a67ea45bc08628aa91cf9ad63cd6c488f198ef6f981ad784cfa6ce3534d937a4a957e02e00d2b09c99301cfba1e90d1996b
SSDEEP 192:H6zrQ049cFyYgK3bHGOJClzVrils7SqOigj9cFyYgK3bHGOJClzVrils7S5RhWlk:H44gcKfcJTMjgcKfcJTAhu6
MD5 SHA1 SHA512 SSDEEP

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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