Malware Analysis Report

2024-10-19 09:24

Sample ID 230901-yqdjmshg26
Target Purchase_Order.pdf.js
SHA256 48bc766326068e078cf258dea70d49dcce265e4e6dbf18f1a0ce28d310f6a89a
Tags
wshrat persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

48bc766326068e078cf258dea70d49dcce265e4e6dbf18f1a0ce28d310f6a89a

Threat Level: Known bad

The file Purchase_Order.pdf.js was found to be: Known bad.

Malicious Activity Summary

wshrat persistence trojan

WSHRAT

Blocklisted process makes network request

Checks computer location settings

Drops startup file

Adds Run key to start application

Enumerates physical storage devices

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-01 19:59

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-01 19:59

Reported

2023-09-01 20:01

Platform

win7-20230831-en

Max time kernel

118s

Max time network

122s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\Purchase_Order.pdf.js

Signatures

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\system32\wscript.exe N/A
N/A N/A C:\Windows\system32\wscript.exe N/A
N/A N/A C:\Windows\system32\wscript.exe N/A
N/A N/A C:\Windows\system32\wscript.exe N/A

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\Purchase_Order.pdf.js

Network

Country Destination Domain Proto
US 8.8.8.8:53 grapemundo.com udp
IN 103.50.163.157:443 grapemundo.com tcp
IN 103.50.163.157:443 grapemundo.com tcp
IN 103.50.163.157:443 grapemundo.com tcp
IN 103.50.163.157:443 grapemundo.com tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-09-01 19:59

Reported

2023-09-01 20:01

Platform

win10v2004-20230831-en

Max time kernel

150s

Max time network

153s

Command Line

wscript.exe C:\Users\Admin\AppData\Local\Temp\Purchase_Order.pdf.js

Signatures

WSHRAT

trojan wshrat

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2848203831-2014322062-3611574811-1000\Control Panel\International\Geo\Nation C:\Windows\system32\wscript.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JGWJBL.vbs C:\Windows\System32\WScript.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JGWJBL.vbs C:\Windows\System32\WScript.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2848203831-2014322062-3611574811-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\JGWJBL = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\JGWJBL.vbs\"" C:\Windows\System32\WScript.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\JGWJBL = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\JGWJBL.vbs\"" C:\Windows\System32\WScript.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2848203831-2014322062-3611574811-1000_Classes\Local Settings C:\Windows\system32\wscript.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1816 wrote to memory of 4764 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\WScript.exe
PID 1816 wrote to memory of 4764 N/A C:\Windows\system32\wscript.exe C:\Windows\System32\WScript.exe

Processes

C:\Windows\system32\wscript.exe

wscript.exe C:\Users\Admin\AppData\Local\Temp\Purchase_Order.pdf.js

C:\Windows\System32\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\JGWJBL.vbs"

Network

Country Destination Domain Proto
US 8.8.8.8:53 grapemundo.com udp
IN 103.50.163.157:443 grapemundo.com tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 157.163.50.103.in-addr.arpa udp
US 8.8.8.8:53 142.33.222.23.in-addr.arpa udp
US 8.8.8.8:53 69.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 chongmei33.publicvm.com udp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 8.8.8.8:53 88.147.111.172.in-addr.arpa udp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 254.21.238.8.in-addr.arpa udp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 8.8.8.8:53 7.173.189.20.in-addr.arpa udp
US 172.111.147.88:7045 chongmei33.publicvm.com tcp
US 172.111.147.88:7045 tcp

Files

C:\Users\Admin\AppData\Local\Temp\JGWJBL.vbs

MD5 788d9b6fd542ea9680d7fd61e3424aec
SHA1 eb4929d2f663fa2bdf3ce6265c85036f4aa88e41
SHA256 7384901adc43848e36b00b3a5bd4a1c9743533d81e4fc33f8bcdec0e8e9a0077
SHA512 81ff571735f6c09ec06fa09e8174ce8bc6907eb0f786296f53d6147a0998014a5c2336700d7d01abada1000ba2dfeeeabae2b626cdcee0851d1c5433f6f5a94d

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\JGWJBL.vbs

MD5 788d9b6fd542ea9680d7fd61e3424aec
SHA1 eb4929d2f663fa2bdf3ce6265c85036f4aa88e41
SHA256 7384901adc43848e36b00b3a5bd4a1c9743533d81e4fc33f8bcdec0e8e9a0077
SHA512 81ff571735f6c09ec06fa09e8174ce8bc6907eb0f786296f53d6147a0998014a5c2336700d7d01abada1000ba2dfeeeabae2b626cdcee0851d1c5433f6f5a94d