vjw0rm | 75a4a64ef3c78207491c676f86de09caa751bc19335dd3555def8f0e521815cc

General

Target

HANYANG MOLD CO., LTD.js
Size

296KB
MD5

6a26da054c21e0e64be2ef60df1edd9e
SHA1

e3b256a4996a60773aeca14d808bb52a02adf5bc
SHA256

75a4a64ef3c78207491c676f86de09caa751bc19335dd3555def8f0e521815cc
SHA512

c2774595561f8777ca844dad71102a91baec7015482177a3d6ad99e3a679011e0e93d6d47105a3281f05bb97fdad4176d10ff02dd6f2cf7a6f262ef94f378631
SSDEEP

3072:pUBw3Cqaa0Q9p/US9ZYfKbmi6Y/+eFgJwkKtb463KMCc9K/MmMF8MIy10C/WJ3bP:pUBw3Cqaa0Q9DG53sU

Score

10^/10

vjw0rm wshrat persistence trojan worm

Malware Config

Extracted

Family

wshrat

C2

http://45.139.105.174:1604

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 23 IoCs

flow	pid	Process
5	2608	wscript.exe
6	660	wscript.exe
7	2608	wscript.exe
16	2608	wscript.exe
17	2608	wscript.exe
19	2608	wscript.exe
22	2608	wscript.exe
24	660	wscript.exe
26	2608	wscript.exe
27	2608	wscript.exe
32	2608	wscript.exe
33	2608	wscript.exe
44	660	wscript.exe
49	2608	wscript.exe
54	2608	wscript.exe
61	2608	wscript.exe
62	660	wscript.exe
69	2608	wscript.exe
70	2608	wscript.exe
80	660	wscript.exe
83	2608	wscript.exe
93	660	wscript.exe
94	2608	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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HANYANG MOLD CO., LTD.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HANYANG MOLD CO., LTD.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\LfnoFIfWXq.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\LfnoFIfWXq.js	wscript.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HANYANG MOLD CO = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\HANYANG MOLD CO., LTD.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HANYANG MOLD CO = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\HANYANG MOLD CO., LTD.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

Script User-Agent 13 IoCs

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

description	flow	ioc
HTTP User-Agent header	5	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	17	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	22	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	26	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	27	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	54	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	69	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	7	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	16	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	19	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	32	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	49	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript
HTTP User-Agent header	61	WSHRAT\|18024990\|TMKNGOMU\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 14/12/2022\|JavaScript

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 2608 wrote to memory of 660	2608	wscript.exe	80
PID 2608 wrote to memory of 660	2608	wscript.exe	80

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\HANYANG MOLD CO., LTD.js"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2608
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\LfnoFIfWXq.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  PID:660

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

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

Filesize
98KB

MD5
8b6987b3f0ecfbc24ae3d7d5a0f56f2f

SHA1
63afe4b0e46085bfd4ce5d9cc2db5ac81a88ee54

SHA256
3c3facfcead8c918eaeb3ff4e5c4b7d67c3d7d66de19dd88f642716505ed5dfd

SHA512
552c998e37e4edddb6281dfb3d6905a0b2900ca26d4b0fc407b615385f5fd86668cb8618e31719cc47f2fcaf5b7722106fb2fdf76077ab8cc74a4d9b2ca45907

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