vjw0rm | d5fd83a507b0f9384bc408819389cd9e23c89b55a0edb6857673fba8113e2159

Analysis

max time kernel
147s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
22/12/2023, 02:44

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General

Target
553975254beafdaab9f69011980b9569.js
Size 231KB
Sample231222-c78v8aahf7
SHA256 d5fd83a507b0f9384bc408819389cd9e23c89b55a0edb6857673fba8113e2159
MD5 553975254beafdaab9f69011980b9569
SHA1 b549e749a1991bf12145a20c1f968c07a1645822
SHA512 ffebe27b3a746439698958852c8e1714813c54744fecad790877583347d54413b3adc60347dbb084a6ea52c9d3902333e688cc0b8e556eb8c545d08543f48112
SSDEEP 3072:4htCq5YabaADWqyDjzccgMaH2kyBq050bCHi0WDv5DpkVibFM3p+iF8NzK9L57qB:Y9SLBgUNlJZWFGVvpBAzK9L57GeWB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

vjw0rm discovery persistence trojan worm

Malware Config

Signatures

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

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-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

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

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2660	icacls.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-1-5-21-1815711207-1844170477-3539718864-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SEJOKAOI5S = "\"C:\\Users\\Admin\\AppData\\Roaming\\dCXvAMFTAC.js\""	WScript.exe

Drops file in Program Files directory 12 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Java\jre-1.8\bin\symbols\dll\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\symbols\dll\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\dll\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\symbols\dll\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\dll\jvm.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\server\dll\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\dll\ntdll.pdb	javaw.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\symbols\dll\ntdll.pdb	javaw.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000_Classes\Local Settings	wscript.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4020 wrote to memory of 4964	4020	wscript.exe	88
PID 4020 wrote to memory of 4964	4020	wscript.exe	88
PID 4020 wrote to memory of 4856	4020	wscript.exe	89
PID 4020 wrote to memory of 4856	4020	wscript.exe	89
PID 4856 wrote to memory of 2660	4856	javaw.exe	92
PID 4856 wrote to memory of 2660	4856	javaw.exe	92

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\553975254beafdaab9f69011980b9569.js
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4020
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\dCXvAMFTAC.js"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  PID:4964
- C:\Program Files\Java\jre-1.8\bin\javaw.exe
  "C:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\alcesbu.txt"
  2⤵
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4856
- - C:\Windows\system32\icacls.exe
    C:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M
    3⤵
    - Modifies file permissions
    PID:2660

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

File and Directory Permissions Modification

T1222

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

3903daac9bc4a3b7.timestamp

Path C:\ProgramData\Oracle\Java\.oracle_jre_usage\3903daac9bc4a3b7.timestamp
Size 46B
SHA256 f9bf2df8ab0590749803a12ae9c71302f57aed2bcfbf49190261289f3b012231
MD5 e44006ddd15a5c854699054c6982589a
SHA1 34143fea801e5e1ffaeb7db5127055a9f9f5409f
SHA512 398da9ca4e18f7b2bba751ce146fc56556caa3ca325255881b8a5cceff585cf58a1ca69c0350e6b4e4615edec95edf67e497d3607afc5e81281d17a7478942d7
MD5 SHA1 SHA512

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alcesbu.txt

Path C:\Users\Admin\AppData\Roaming\alcesbu.txt
Size 107KB
SHA256 15ddd12f95653df0799fc8420b8d5d73361d3fd9a97237da094f4440ba108580
MD5 d1abdb24c44f1ec93c4800f3128cf01f
SHA1 765a23589063a01d8c3e0b4e5615ac5d0ac475a6
SHA512 659310fb4e2750cbb87ead008ffda551c6ce3296690c8747231b21ce8543961cecfbefb2c1cb9ba41f6fe87c60cd4f312549b1eab6039337514e2c18b529887f
SSDEEP 1536:stZBF4WjC06rvua83Qp8pG8MfYXm6pWtrKQ9hh1PfCldMBErQdUUe4Ttjhoy93X:sFF5jC0SvN83Qp1Alp1yXbjjhoy9H
MD5 SHA1 SHA512 SSDEEP

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dCXvAMFTAC.js

Path C:\Users\Admin\AppData\Roaming\dCXvAMFTAC.js
Size 10KB
SHA256 59c024a2c7a05e9ec38e3658822a498de263e72535fa602bc16e05d77dc3cec0
MD5 bc151eedb995b062c850ec907d92c2e0
SHA1 2500517c7912737a59f3946fabbb506c6f294682
SHA512 a6dece2d1f59469a0f1a474ac310a98a511571600158179151a9b0bdb583081b99f46c72e9644250a7864879d7bb67cd9843154a2fa3b7654a5c44420eccee49
SSDEEP 192:gkMig/R6zj6okLvcrJIhm2943s3kaRXB4HqcQpspQJg0w:gijOAJm9eMkAJcQpspQJgB
MD5 SHA1 SHA512 SSDEEP

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memory/4856-12-0x000002A880000000-0x000002A881000000-memory.dmp

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memory/4856-19-0x000002A8FA630000-0x000002A8FA631000-memory.dmp

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memory/4856-26-0x000002A880000000-0x000002A881000000-memory.dmp

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memory/4856-27-0x000002A880280000-0x000002A880290000-memory.dmp

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memory/4856-28-0x000002A880290000-0x000002A8802A0000-memory.dmp

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memory/4856-29-0x000002A880000000-0x000002A881000000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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