vjw0rm | c82380d45b2e255e7121f6a76b2e9daf3e03836b8f3121f29aab932377fc8dc5

General

Target
RZKpmwZyCc_movar.js
Size 68KB
Sample221202-vx7jhsgg46
SHA256 c82380d45b2e255e7121f6a76b2e9daf3e03836b8f3121f29aab932377fc8dc5
MD5 387b3482bc2829229722380c02a7a6f0
SHA1 81869d1b70775e564e583fb955ae8179b183122f
SHA512 5810c27e2b677c0864198cd03a06100324e85c53f6324429a8a680a935e064dfc141920303a60c732ad3f2bab8e48b11261a5c963e9e362dac19414aa83b299b
SSDEEP 1536:enVk9hSrHAb6G+GCEnwH+acT16uXNWrI5UjelXjk:enq9qHE9+CBT16tB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

vjw0rm wshrat persistence trojan worm

Malware Config

Extracted

Family

wshrat

C2

http://45.139.105.174:7670

Signatures

Vjw0rm
Vjw0rm is a remote access trojan written in JavaScript.
trojan worm vjw0rm
WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

Blocklisted process makes network request 11 IoCs

flow	pid	Process
54	4440	wscript.exe
56	2844	wscript.exe
57	4820	wscript.exe
77	4440	wscript.exe
81	4820	wscript.exe
82	2844	wscript.exe
88	4440	wscript.exe
92	2844	wscript.exe
93	4820	wscript.exe
101	4440	wscript.exe
105	4440	wscript.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	wscript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 5 IoCs

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

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RZKpmwZyCc_movar = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\RZKpmwZyCc_movar.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RZKpmwZyCc_movar = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\RZKpmwZyCc_movar.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RZKpmwZyCc_movar = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\RZKpmwZyCc_movar.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RZKpmwZyCc_movar = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\RZKpmwZyCc_movar.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe

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

System Information Discovery
T1082

Script User-Agent 3 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	77	WSHRAT\|36C15E1A\|WIJBFSKT\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 2/12/2022\|JavaScript
HTTP User-Agent header	101	WSHRAT\|36C15E1A\|WIJBFSKT\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 2/12/2022\|JavaScript
HTTP User-Agent header	105	WSHRAT\|36C15E1A\|WIJBFSKT\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 2/12/2022\|JavaScript

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4272 wrote to memory of 4820	4272	wscript.exe	85
PID 4272 wrote to memory of 4820	4272	wscript.exe	85
PID 4272 wrote to memory of 4440	4272	wscript.exe	86
PID 4272 wrote to memory of 4440	4272	wscript.exe	86
PID 4440 wrote to memory of 2844	4440	wscript.exe	87
PID 4440 wrote to memory of 2844	4440	wscript.exe	87

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\RZKpmwZyCc_movar.js
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4272
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\pTycLbjPNg.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  PID:4820
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\RZKpmwZyCc_movar.js"
  2⤵
  - Blocklisted process makes network request
  - Checks computer location settings
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:4440
- - C:\Windows\System32\wscript.exe
    "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\pTycLbjPNg.js"
    3⤵
    - Blocklisted process makes network request
    - Drops startup file
    PID:2844

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

RZKpmwZyCc_movar.js

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RZKpmwZyCc_movar.js
Size 68KB
SHA256 c82380d45b2e255e7121f6a76b2e9daf3e03836b8f3121f29aab932377fc8dc5
MD5 387b3482bc2829229722380c02a7a6f0
SHA1 81869d1b70775e564e583fb955ae8179b183122f
SHA512 5810c27e2b677c0864198cd03a06100324e85c53f6324429a8a680a935e064dfc141920303a60c732ad3f2bab8e48b11261a5c963e9e362dac19414aa83b299b
SSDEEP 1536:enVk9hSrHAb6G+GCEnwH+acT16uXNWrI5UjelXjk:enq9qHE9+CBT16tB
MD5 SHA1 SHA512 SSDEEP

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RZKpmwZyCc_movar.js

Path C:\Users\Admin\AppData\Roaming\RZKpmwZyCc_movar.js
Size 68KB
SHA256 c82380d45b2e255e7121f6a76b2e9daf3e03836b8f3121f29aab932377fc8dc5
MD5 387b3482bc2829229722380c02a7a6f0
SHA1 81869d1b70775e564e583fb955ae8179b183122f
SHA512 5810c27e2b677c0864198cd03a06100324e85c53f6324429a8a680a935e064dfc141920303a60c732ad3f2bab8e48b11261a5c963e9e362dac19414aa83b299b
SSDEEP 1536:enVk9hSrHAb6G+GCEnwH+acT16uXNWrI5UjelXjk:enq9qHE9+CBT16tB
MD5 SHA1 SHA512 SSDEEP

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pTycLbjPNg.js

Path C:\Users\Admin\AppData\Roaming\pTycLbjPNg.js
Size 16KB
SHA256 1931b5e0f1160d985036b8fd753dd93206db0f03eb6b15c6d1e04b437066e9d9
MD5 109194f9f824f9cbcbc8cbaf85502175
SHA1 faf63812152fc2c5b1858c1f6acc41ef81475dc5
SHA512 63362d6e68cf44008ea8535265dd0b5fbbd2bf58c5d501be100f4d5c23549e3165c611f0d26b89e13ba4578b7bd1964fbb931ec769af453b1935e1e4a73b8e93
SSDEEP 384:02/W3iWiUu2Y29uGg4HlvmlJSgfpPrq3SynjqD+191hQ:0t3iWiURY29uGVVgfQjqD+1916
MD5 SHA1 SHA512 SSDEEP

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pTycLbjPNg.js

Path C:\Users\Admin\AppData\Roaming\pTycLbjPNg.js
Size 16KB
SHA256 1931b5e0f1160d985036b8fd753dd93206db0f03eb6b15c6d1e04b437066e9d9
MD5 109194f9f824f9cbcbc8cbaf85502175
SHA1 faf63812152fc2c5b1858c1f6acc41ef81475dc5
SHA512 63362d6e68cf44008ea8535265dd0b5fbbd2bf58c5d501be100f4d5c23549e3165c611f0d26b89e13ba4578b7bd1964fbb931ec769af453b1935e1e4a73b8e93
SSDEEP 384:02/W3iWiUu2Y29uGg4HlvmlJSgfpPrq3SynjqD+191hQ:0t3iWiURY29uGVVgfQjqD+1916
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads