vjw0rm | b6e0c17a224fe0df6f58add122e0420aad76a697c1d7634aa0cfe2f5dc84dc2b

General

Target

windows.exe
Size

541KB
MD5

c159fc653a86ef3eab80e5d06b9cfa2c
SHA1

f95b35bcd8528dafda2b8fd53bed2bab150676e3
SHA256

b6e0c17a224fe0df6f58add122e0420aad76a697c1d7634aa0cfe2f5dc84dc2b
SHA512

78ee8d1c957f21e6023f4c9096f63c9bc697620cfc7584bb937b4cffb792f312c8fd0cb586c0aa4f43ddf8e622042f2c85852f10018e0c5799d6dd02903ab9f2
SSDEEP

12288:lBXSh9d55EWf6bkHXgtQZDsfDfWXWBt9ExkUp8ZbcoahOOufKlgc+ABeaESJAzEM:7QZQz8Du4

Score

10^/10

vjw0rm wshrat persistence trojan worm

Malware Config

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 4 IoCs

resource	yara_rule
behavioral2/files/0x000d000000023228-136.dat	family_wshrat
behavioral2/files/0x0006000000023257-139.dat	family_wshrat
behavioral2/files/0x0006000000023258-141.dat	family_wshrat
behavioral2/files/0x0006000000023258-142.dat	family_wshrat

Blocklisted process makes network request 32 IoCs

flow	pid	Process
38	4236	wscript.exe
41	4236	wscript.exe
42	3300	wscript.exe
43	3300	wscript.exe
46	3300	wscript.exe
47	5032	WScript.exe
49	3300	wscript.exe
51	3300	wscript.exe
52	5032	WScript.exe
63	3300	wscript.exe
64	5032	WScript.exe
65	3300	wscript.exe
77	5032	WScript.exe
78	3300	wscript.exe
82	5032	WScript.exe
83	3300	wscript.exe
85	3300	wscript.exe
86	5032	WScript.exe
87	3300	wscript.exe
88	5032	WScript.exe
94	3300	wscript.exe
95	5032	WScript.exe
96	3300	wscript.exe
97	5032	WScript.exe
98	3300	wscript.exe
99	3300	wscript.exe
100	5032	WScript.exe
101	3300	wscript.exe
102	5032	WScript.exe
103	3300	wscript.exe
104	5032	WScript.exe
105	3300	wscript.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-2177513644-1903222820-241662473-1000\Control Panel\International\Geo\Nation	windows.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\Control Panel\International\Geo\Nation	wscript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 3 IoCs

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

Adds Run key to start application 2 TTPs 10 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lRDdN = "wscript.exe //B \"C:\\Users\\Admin\\lRDdN.vbs\""	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\lRDdN = "wscript.exe //B \"C:\\Users\\Admin\\lRDdN.vbs\""	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\lRDdN = "wscript.exe //B \"C:\\Users\\Admin\\lRDdN.vbs\""	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\BXBCC2V24Z = "\"C:\\Users\\Admin\\AppData\\Roaming\\windows.js\""	WScript.exe
Key created	\REGISTRY\MACHINE\software\WOW6432Node\microsoft\windows\currentversion\run	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lRDdN = "wscript.exe //B \"C:\\Users\\Admin\\lRDdN.vbs\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\WOW6432Node\microsoft\windows\currentversion\run	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2177513644-1903222820-241662473-1000\Software\Microsoft\Windows\CurrentVersion\Run	WScript.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

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
44	ip-api.com

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-1-5-21-2177513644-1903222820-241662473-1000_Classes\Local Settings	wscript.exe

Script User-Agent 4 IoCs

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

description	flow	ioc
HTTP User-Agent header	38	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	41	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	42	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	43	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4032 wrote to memory of 4236	4032	windows.exe	86
PID 4032 wrote to memory of 4236	4032	windows.exe	86
PID 4032 wrote to memory of 4236	4032	windows.exe	86
PID 4236 wrote to memory of 3300	4236	wscript.exe	91
PID 4236 wrote to memory of 3300	4236	wscript.exe	91
PID 4236 wrote to memory of 3300	4236	wscript.exe	91
PID 3300 wrote to memory of 5032	3300	wscript.exe	92
PID 3300 wrote to memory of 5032	3300	wscript.exe	92
PID 3300 wrote to memory of 5032	3300	wscript.exe	92

C:\Users\Admin\AppData\Local\Temp\windows.exe
"C:\Users\Admin\AppData\Local\Temp\windows.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4032
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\System32\wscript.exe" "C:\Users\Admin\AppData\Roaming\lRDdN.vbs"
  2⤵
  - Blocklisted process makes network request
  - Checks computer location settings
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:4236
- - C:\Windows\SysWOW64\wscript.exe
    "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\lRDdN.vbs"
    3⤵
    - Blocklisted process makes network request
    - Checks computer location settings
    - Drops startup file
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:3300
  - - C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\windows.js"
      4⤵
      Blocklisted process makes network request
      Drops startup file
      Adds Run key to start application
      PID:5032

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Web Service

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\QM3UZKSX\json[1].json

Filesize
323B

MD5
0c17abb0ed055fecf0c48bb6e46eb4eb

SHA1
a692730c8ec7353c31b94a888f359edb54aaa4c8

SHA256
f41e99f954e33e7b0e39930ec8620bf29801efc44275c1ee6b5cfa5e1be202c0

SHA512
645a9f2f94461d8a187261b736949df398ece5cfbf1af8653d18d3487ec1269d9f565534c1e249c12f31b3b1a41a8512953b1e991b001fc1360059e3fd494ec3

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lRDdN.vbs

Filesize
185KB

MD5
43fca5129026c9b6b49ce26c27759df2

SHA1
46a4acdd5faae42e04ba753f69e6e777324ae8e9

SHA256
a6772f8687d81d92138a6cfa10ead2b3c409a0884053a1600c640ae65eea517e

SHA512
c465b24ebba4ce399e7e8605b8b93993e92916b653c42c470e9168a8a9573bfc42bb1dc730674e1fc7656453820fc3a19240514c1bd2b8acf32d87ffa09cf228

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\lRDdN.vbs

Filesize
185KB

MD5
43fca5129026c9b6b49ce26c27759df2

SHA1
46a4acdd5faae42e04ba753f69e6e777324ae8e9

SHA256
a6772f8687d81d92138a6cfa10ead2b3c409a0884053a1600c640ae65eea517e

SHA512
c465b24ebba4ce399e7e8605b8b93993e92916b653c42c470e9168a8a9573bfc42bb1dc730674e1fc7656453820fc3a19240514c1bd2b8acf32d87ffa09cf228

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\windows.js

Filesize
3KB

MD5
14d1d9d3dc5e8d0eac04d5b78645a2ea

SHA1
aa14b5a613919e41c4d97fef48ff1a24ff06fd2b

SHA256
92d5609974d3d52dc028185e819111679f0ff052c1e3b951e2eee9b18e361f36

SHA512
e13cc2ca8b4dc4564a2176e4bc06d2a3271a957918cb84589402462ea2fe33782eb92ab1575187ab07ac3e270e8301607bff6b7ccb1dd688666be940716f092c

Download Submit
C:\Users\Admin\AppData\Roaming\lRDdN.vbs

Filesize
185KB

MD5
43fca5129026c9b6b49ce26c27759df2

SHA1
46a4acdd5faae42e04ba753f69e6e777324ae8e9

SHA256
a6772f8687d81d92138a6cfa10ead2b3c409a0884053a1600c640ae65eea517e

SHA512
c465b24ebba4ce399e7e8605b8b93993e92916b653c42c470e9168a8a9573bfc42bb1dc730674e1fc7656453820fc3a19240514c1bd2b8acf32d87ffa09cf228

Download Submit
C:\Users\Admin\lRDdN.vbs

Filesize
185KB

MD5
43fca5129026c9b6b49ce26c27759df2

SHA1
46a4acdd5faae42e04ba753f69e6e777324ae8e9

SHA256
a6772f8687d81d92138a6cfa10ead2b3c409a0884053a1600c640ae65eea517e

SHA512
c465b24ebba4ce399e7e8605b8b93993e92916b653c42c470e9168a8a9573bfc42bb1dc730674e1fc7656453820fc3a19240514c1bd2b8acf32d87ffa09cf228

Download Submit
C:\Users\Admin\windows.js

Filesize
3KB

MD5
14d1d9d3dc5e8d0eac04d5b78645a2ea

SHA1
aa14b5a613919e41c4d97fef48ff1a24ff06fd2b

SHA256
92d5609974d3d52dc028185e819111679f0ff052c1e3b951e2eee9b18e361f36

SHA512
e13cc2ca8b4dc4564a2176e4bc06d2a3271a957918cb84589402462ea2fe33782eb92ab1575187ab07ac3e270e8301607bff6b7ccb1dd688666be940716f092c

Download Submit
memory/4032-133-0x00000000016B0000-0x00000000016C0000-memory.dmp

Filesize
64KB

Download

Analysis

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