vjw0rm | 6b12cfb0d109c8944d64556320bb63e2b0a287b8583c16cc4eb3b32f86fe31c8

General

Target

PO.js
Size

5KB
MD5

2847ee58cb7ef2bc9d410ad73a15961f
SHA1

701a342c49ec6d2c802847157e6a68154168bbf8
SHA256

6b12cfb0d109c8944d64556320bb63e2b0a287b8583c16cc4eb3b32f86fe31c8
SHA512

3245868c4700d28843fc98e6e15eefc269da745b334bc3678f1710d1a7520305bfd5dc2c2cc87ebdd6e114f850eebcb69b55d3f2297d560b5d55621203ee78e6
SSDEEP

96:u9GyFqVgE4DBLSjsg2B7pikxVHFQba/40zpzw4wu+huzLsFZZRKC8CEsrYcshAiR:VuEgBOwZFiO+a/40zNw4wFSLYZRHEsrs

Score

10^/10

vjw0rm wshrat persistence trojan worm

Malware Config

Extracted

Family

vjw0rm

C2

http://212.193.30.230:6505

Extracted

Family

wshrat

C2

http://212.193.30.230:3605

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

WSHRAT payload 1 IoCs

resource	yara_rule
behavioral1/files/0x000a00000000b52e-56.dat	family_wshrat

Blocklisted process makes network request 7 IoCs

flow	pid	Process
3	2012	wscript.exe
7	432	WScript.exe
8	432	WScript.exe
9	432	WScript.exe
10	432	WScript.exe
12	432	WScript.exe
13	432	WScript.exe

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PO.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\K3VRVF5TEJ.js	WScript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\K3VRVF5TEJ.js	WScript.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\2JZFR52JWJ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\PO.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\K3VRVF5TEJ = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\K3VRVF5TEJ.js\""	WScript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\K3VRVF5TEJ = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\K3VRVF5TEJ.js\""	WScript.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
6	ip-api.com

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 4 IoCs

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

description	flow	ioc
HTTP User-Agent header	12	WSHRAT\|5C41F0CB\|ZERMMMDR\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 1/11/2022\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	8	WSHRAT\|5C41F0CB\|ZERMMMDR\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 1/11/2022\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	9	WSHRAT\|5C41F0CB\|ZERMMMDR\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 1/11/2022\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	10	WSHRAT\|5C41F0CB\|ZERMMMDR\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 1/11/2022\|JavaScript-v3.4\|NL:Netherlands

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 432	2012	wscript.exe	31
PID 2012 wrote to memory of 432	2012	wscript.exe	31
PID 2012 wrote to memory of 432	2012	wscript.exe	31

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\PO.js
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\K3VRVF5TEJ.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:432

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\K3VRVF5TEJ.js

Filesize
187KB

MD5
f50524dfc4c60f0f399bb5c4a1572d18

SHA1
7ed8be558150cf1b979150c7ca6bf9278a96ff9d

SHA256
10c880bf2129d24a52c3442cbd030787058cc4621197838ca7a4987be39c0fa7

SHA512
7775792c92c180edb0d73455eb761c465fd90137345d61add9f8febbfe13903580b02589775849f422ffffe01076a53be4cdf01eaebc222ab1df6f3a5206fb14

Download Submit
memory/2012-54-0x000007FEFB741000-0x000007FEFB743000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads