vjw0rm | bb5b9634aeabce06f65c0a91cabdc75f4db2197c8ced0f36cbf69f67afe2c169

Analysis

max time kernel
146s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240319-en
resource tags

arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
submitted
04/04/2024, 07:50

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General

Target
b2c51765548969781036522266ccfdda_JaffaCakes118.js
Size 20KB
Sample240404-jpkh8sac39
SHA256 bb5b9634aeabce06f65c0a91cabdc75f4db2197c8ced0f36cbf69f67afe2c169
MD5 b2c51765548969781036522266ccfdda
SHA1 981e625aeaec03dc095ab754e2e7667d63e76a4e
SHA512 4a930725a96bf66da8cd09f5449a56ee2ed79d3bdead040fafe70bfb26f2468af5d3e2298467c1a5ed5fc633497fc2a2967982ff2f8b8a0130f961dfecf2e1ec
SSDEEP 384:Jm3uw3bAXbwnA/UdyZUvuQifxaYPtbe/tr20KCgPM3l44C4er0UQFQhfd1:klrALD/LZ3QipxPBe9D1gua4j2P
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 3 IoCs

flow	pid	Process
9	1108	wscript.exe
11	1108	wscript.exe
13	1108	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-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RCgxKRPluq.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RCgxKRPluq.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-1-5-21-817259280-2658881748-983986378-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SEJOKAOI5S = "\"C:\\Users\\Admin\\AppData\\Roaming\\RCgxKRPluq.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 1108 wrote to memory of 4496	1108	wscript.exe	94
PID 1108 wrote to memory of 4496	1108	wscript.exe	94

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\b2c51765548969781036522266ccfdda_JaffaCakes118.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1108
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\RCgxKRPluq.js"
  2⤵
  - Drops startup file
  - Adds Run key to start application
  PID:4496

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4060 --field-trial-handle=2320,i,3025503729105798828,9325691672526736153,262144 --variations-seed-version /prefetch:8
1⤵
PID:4360

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

RCgxKRPluq.js

Path C:\Users\Admin\AppData\Roaming\RCgxKRPluq.js
Size 8KB
SHA256 eaf198b45687701dbcf79058268f935768c56d2dfb5b872d38bcd55914797359
MD5 7c826f91bfb64d09816ea0e339b2c5a6
SHA1 053bb10eda213fb3b87afc656f231b3a27951b17
SHA512 36c8620340fca84cd40ac139d0861b0702571363dd8cb27a56a80c3645f3bc0d7a27cc82ba8bb287ed76b6930795cb6693b48bb6d871953eea6359fbffd46a78
SSDEEP 192:Jm3vmw31li1EkzKIiqjK1pSEx0KI6P9RUwUZUg6Zx16Jhfd1:Jm3uw3bi8Bfpk6P9RL+36Qhfd1
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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Downloads