wshrat | 39f7abd459bda03744d7d1dfb7dd15b2204014d75f20d86a13789648d6f44b1d

General

Target

Rechnung2498.js
Size

179KB
MD5

093aa4289d9d8d8315ab0ea9b306f0a0
SHA1

0316c6e558148a10d0acf63bc84f53ca315b1acf
SHA256

39f7abd459bda03744d7d1dfb7dd15b2204014d75f20d86a13789648d6f44b1d
SHA512

ddea7839a14759a27d17578850fb473f720bf911cb9d6e56c3e55a963eca51a85ae1706d2f8bca31b216fa7ef2457135dd1a198008203e6635cb73fd3df985f8

Score

10^/10

wshrat persistence trojan

Malware Config

Signatures

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

WSHRAT Payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Rechnung2498.js	family_wshrat
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Rechnung2498.js	family_wshrat

Blocklisted process makes network request 7 IoCs

Processes:

wscript.exe

flow pid process

6 3904 wscript.exe
7 3904 wscript.exe
14 3904 wscript.exe
15 3904 wscript.exe
16 3904 wscript.exe
17 3904 wscript.exe
18 3904 wscript.exe

flow	pid	process
6	3904	wscript.exe
7	3904	wscript.exe
14	3904	wscript.exe
15	3904	wscript.exe
16	3904	wscript.exe
17	3904	wscript.exe
18	3904	wscript.exe

Drops startup file 2 IoCs

Processes:

wscript.exewscript.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Rechnung2498.js	wscript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Rechnung2498.js	wscript.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exewscript.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rechnung2498 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Rechnung2498.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rechnung2498 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Rechnung2498.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rechnung2498 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Rechnung2498.js\""	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rechnung2498 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\Rechnung2498.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\software\microsoft\windows\currentversion\run	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.

Processes:

flow ioc

5 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
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

wscript.exe

description pid process target process

PID 896 wrote to memory of 3904 896 wscript.exe wscript.exe
PID 896 wrote to memory of 3904 896 wscript.exe wscript.exe

flow	ioc
5	ip-api.com

description	pid	process	target process
PID 896 wrote to memory of 3904	896	wscript.exe	wscript.exe
PID 896 wrote to memory of 3904	896	wscript.exe	wscript.exe

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Rechnung2498.js
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:896
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\Rechnung2498.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  PID:3904

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Rechnung2498.js

MD5
093aa4289d9d8d8315ab0ea9b306f0a0

SHA1
0316c6e558148a10d0acf63bc84f53ca315b1acf

SHA256
39f7abd459bda03744d7d1dfb7dd15b2204014d75f20d86a13789648d6f44b1d

SHA512
ddea7839a14759a27d17578850fb473f720bf911cb9d6e56c3e55a963eca51a85ae1706d2f8bca31b216fa7ef2457135dd1a198008203e6635cb73fd3df985f8

Download Submit
C:\Users\Admin\AppData\Roaming\Rechnung2498.js

MD5
093aa4289d9d8d8315ab0ea9b306f0a0

SHA1
0316c6e558148a10d0acf63bc84f53ca315b1acf

SHA256
39f7abd459bda03744d7d1dfb7dd15b2204014d75f20d86a13789648d6f44b1d

SHA512
ddea7839a14759a27d17578850fb473f720bf911cb9d6e56c3e55a963eca51a85ae1706d2f8bca31b216fa7ef2457135dd1a198008203e6635cb73fd3df985f8

Download Submit
memory/3904-2-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads