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 15 IoCs

flow	pid	Process
4	2360	wscript.exe
6	2360	wscript.exe
8	2360	wscript.exe
9	2360	wscript.exe
11	2360	wscript.exe
12	2360	wscript.exe
13	2360	wscript.exe
15	2360	wscript.exe
16	2360	wscript.exe
17	2360	wscript.exe
19	2360	wscript.exe
20	2360	wscript.exe
21	2360	wscript.exe
23	2360	wscript.exe
24	2360	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
3	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 14 IoCs

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

description	flow	ioc
HTTP User-Agent header	9	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	11	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	15	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	16	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	23	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	24	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	6	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	8	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	17	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	19	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	21	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	12	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	13	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands
HTTP User-Agent header	20	WSHRAT\|383B10AE\|RBHOAWCN\|Admin\|Microsoft Windows 7 Ultimate \|plus\|nan-av\|false - 23/10/2023\|JavaScript-v3.4\|NL:Netherlands

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2360	2256	wscript.exe	29
PID 2256 wrote to memory of 2360	2256	wscript.exe	29
PID 2256 wrote to memory of 2360	2256	wscript.exe	29

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Tax-Returns-Of-R58-765.js
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:2256
- 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:2360

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

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
1.0MB

MD5
aa4bb1e4cfe615e1890c18959f0f6fe6

SHA1
00fead3c49c16e409139630f011a00f2254adb9e

SHA256
21d1b6a68906c9062a548838de678dc76f763bb8300ae753e352716dcdd9be7b

SHA512
39489bbad7b8bbf59082531800bd78e2fce2475508addc0ddc43b17073500250bebc8491acaaff2e72b0fe364d52bde6ed81a9e338a53c9ff3b78962937040f3

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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