vjw0rm | 344b8c7c7c4467f18c9b43447efafad8ac795c25b006465aeb1bd6097b50abb7

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
17-05-2023 09:31

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General

Target

Confirmation Slip.PDF.js
Size

3.4MB
MD5

f8ddd3aaf61755a6c98ec2c29972175c
SHA1

1ddd1757ef6be65c231dc383369b84773544a6da
SHA256

344b8c7c7c4467f18c9b43447efafad8ac795c25b006465aeb1bd6097b50abb7
SHA512

a6ebf3d3ffa5c749f2ea2dc5eb90a7a355b8dcc1cf5b7b48cfdbc291b8f5f6df560ffcd59a6242583e64d0795ba034ad7aea2b68039b98b9b50259305e13e1c9
SSDEEP

24576:zw3cOiE9u9QbpAW0MP074JExjtKTs7JRkWgGgbR4L3lN2bpxjkn1vrFWuYLasHfy:E0j

Score

10^/10

vjw0rm wshrat persistence trojan worm

Malware Config

Extracted

Family

wshrat

http://84.21.172.33:8895

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 38 IoCs

flow	pid	Process
6	1312	wscript.exe
7	1696	wscript.exe
8	1696	wscript.exe
10	1312	wscript.exe
12	1696	wscript.exe
14	1312	wscript.exe
16	1696	wscript.exe
19	1312	wscript.exe
20	1696	wscript.exe
23	1696	wscript.exe
25	1312	wscript.exe
26	1696	wscript.exe
28	1696	wscript.exe
30	1312	wscript.exe
33	1696	wscript.exe
35	1312	wscript.exe
36	1696	wscript.exe
38	1696	wscript.exe
40	1312	wscript.exe
42	1696	wscript.exe
44	1312	wscript.exe
47	1696	wscript.exe
48	1312	wscript.exe
49	1696	wscript.exe
51	1696	wscript.exe
54	1312	wscript.exe
56	1696	wscript.exe
57	1312	wscript.exe
58	1696	wscript.exe
62	1696	wscript.exe
64	1312	wscript.exe
65	1696	wscript.exe
67	1312	wscript.exe
68	1696	wscript.exe
70	1696	wscript.exe
73	1312	wscript.exe
75	1696	wscript.exe
77	1312	wscript.exe

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Confirmation Slip.PDF.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Confirmation Slip.PDF.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JbhvVxjFLu.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JbhvVxjFLu.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
Set value (str)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows\CurrentVersion\Run\Confirmation Slip = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Confirmation Slip.PDF.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Confirmation Slip = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\Confirmation Slip.PDF.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\software\microsoft\windows\currentversion\run	wscript.exe

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

System Information Discovery
T1082

Script User-Agent 22 IoCs

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

description	flow	ioc
HTTP User-Agent header	12	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	49	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	51	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	58	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	62	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	68	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	38	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	75	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	7	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	8	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	16	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	20	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	23	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	26	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	36	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	56	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	65	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	28	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	33	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	42	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	47	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript
HTTP User-Agent header	70	WSHRAT\|9CA37D4D\|YBHADZIG\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 17/5/2023\|JavaScript

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 1312	1696	wscript.exe	27
PID 1696 wrote to memory of 1312	1696	wscript.exe	27
PID 1696 wrote to memory of 1312	1696	wscript.exe	27

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\Confirmation Slip.PDF.js"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\JbhvVxjFLu.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  PID:1312

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
346KB

MD5
094b69598513ca6dad4609a1a622c665

SHA1
44fbd36b3c2eec31e3424d7ec5d93d50721e7d13

SHA256
f50dc6f0205c3d62f02ef2df694a1bb468b110efc83b38236747d1b40c3cbc33

SHA512
558b6ae3466c0ca2eee60665acb41f3ab9deacd7898cfd2404ed726f47990d188ba3eec429cba91aeed9d87a4b37d17be78801009ecb42d4c8dadd2f017fed67

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

Filesize
3.4MB

MD5
f8ddd3aaf61755a6c98ec2c29972175c

SHA1
1ddd1757ef6be65c231dc383369b84773544a6da

SHA256
344b8c7c7c4467f18c9b43447efafad8ac795c25b006465aeb1bd6097b50abb7

SHA512
a6ebf3d3ffa5c749f2ea2dc5eb90a7a355b8dcc1cf5b7b48cfdbc291b8f5f6df560ffcd59a6242583e64d0795ba034ad7aea2b68039b98b9b50259305e13e1c9

Download Submit