wshrat | 21d1b6a68906c9062a548838de678dc76f763bb8300ae753e352716dcdd9be7b

General

Target

Tax-Returns-Of-R58-765.js
Size

1.0MB
MD5

aa4bb1e4cfe615e1890c18959f0f6fe6
SHA1

00fead3c49c16e409139630f011a00f2254adb9e
SHA256

21d1b6a68906c9062a548838de678dc76f763bb8300ae753e352716dcdd9be7b
SHA512

39489bbad7b8bbf59082531800bd78e2fce2475508addc0ddc43b17073500250bebc8491acaaff2e72b0fe364d52bde6ed81a9e338a53c9ff3b78962937040f3
SSDEEP

1536:MQ65yrQXApr8K8Y898K8Y8y3CAnuCLkxN013iog2jUS0XS0PH6Z86iLvXg0AnhPd:MQqEY1jbMYBX9h34FC/

Score

10^/10

wshrat trojan

Malware Config

Extracted

Family

wshrat

C2

http://harold.ns01.info:3609

Signatures

WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

Blocklisted process makes network request 14 IoCs

flow	pid	Process
2	224	wscript.exe
4	224	wscript.exe
17	224	wscript.exe
18	224	wscript.exe
33	224	wscript.exe
34	224	wscript.exe
35	224	wscript.exe
41	224	wscript.exe
42	224	wscript.exe
46	224	wscript.exe
49	224	wscript.exe
50	224	wscript.exe
51	224	wscript.exe
55	224	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-1-5-21-356073083-3299209671-3108880702-1000\Control Panel\International\Geo\Nation	wscript.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Tax-Returns-Of-R58-765.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Tax-Returns-Of-R58-765.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
1	ip-api.com

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

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	34	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	35	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	41	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	49	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	42	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	4	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	33	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	17	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	18	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	46	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	50	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	51	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	55	WSHRAT\|C20800CC\|TPTLJPNX\|Admin\|Microsoft Windows 10 Pro\|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3636 wrote to memory of 224	3636	wscript.exe	84
PID 3636 wrote to memory of 224	3636	wscript.exe	84

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Tax-Returns-Of-R58-765.js
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:3636
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\Tax-Returns-Of-R58-765.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  PID:224

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Tax-Returns-Of-R58-765.js

Filesize
64KB

MD5
22e147d51eb9a62a23ca8d094c3a567f

SHA1
f72c886afe3b883a7ce6d566d8c4a5a4a0548338

SHA256
fa81aa65809501b3e6a73be9ebf2312a3f68372c1f6e75d8fc9436432380919f

SHA512
1257760aa1d0b634d05e696a8f281215e42b7f508e8acf25119262e3606b70a73f2e6248918613e83a883c0c013bc6cef8212a914daca7a5227a2b410d2a76cf

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Tax-Returns-Of-R58-765.js

Filesize
1.0MB

MD5
aa4bb1e4cfe615e1890c18959f0f6fe6

SHA1
00fead3c49c16e409139630f011a00f2254adb9e

SHA256
21d1b6a68906c9062a548838de678dc76f763bb8300ae753e352716dcdd9be7b

SHA512
39489bbad7b8bbf59082531800bd78e2fce2475508addc0ddc43b17073500250bebc8491acaaff2e72b0fe364d52bde6ed81a9e338a53c9ff3b78962937040f3

Download Submit
C:\Users\Admin\Tax-Returns-Of-R58-765.js

Filesize
1.0MB

MD5
aa4bb1e4cfe615e1890c18959f0f6fe6

SHA1
00fead3c49c16e409139630f011a00f2254adb9e

SHA256
21d1b6a68906c9062a548838de678dc76f763bb8300ae753e352716dcdd9be7b

SHA512
39489bbad7b8bbf59082531800bd78e2fce2475508addc0ddc43b17073500250bebc8491acaaff2e72b0fe364d52bde6ed81a9e338a53c9ff3b78962937040f3

Download Submit

Analysis

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