Malware Analysis Report

2024-10-23 19:26

Sample ID 240525-cdys6aaf5z
Target b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe
SHA256 b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687
Tags
asyncrat op rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687

Threat Level: Known bad

The file b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe was found to be: Known bad.

Malicious Activity Summary

asyncrat op rat

AsyncRat

Detects file containing reversed ASEP Autorun registry keys

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-05-25 01:58

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-25 01:58

Reported

2024-05-25 02:00

Platform

win7-20240508-en

Max time kernel

120s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe"

Signatures

AsyncRat

rat asyncrat

Detects file containing reversed ASEP Autorun registry keys

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 956 set thread context of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 956 wrote to memory of 1700 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe

"C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

#system32

Network

Country Destination Domain Proto
GB 20.117.108.240:5612 tcp

Files

memory/956-0-0x0000000073EBE000-0x0000000073EBF000-memory.dmp

memory/956-1-0x0000000000BE0000-0x0000000000BFE000-memory.dmp

memory/1700-9-0x0000000000400000-0x0000000000412000-memory.dmp

memory/1700-13-0x0000000000400000-0x0000000000412000-memory.dmp

memory/1700-11-0x0000000000400000-0x0000000000412000-memory.dmp

memory/1700-7-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/1700-6-0x0000000000400000-0x0000000000412000-memory.dmp

memory/1700-5-0x0000000000400000-0x0000000000412000-memory.dmp

memory/1700-3-0x0000000000400000-0x0000000000412000-memory.dmp

memory/956-4-0x0000000073EB0000-0x000000007459E000-memory.dmp

memory/1700-2-0x0000000000400000-0x0000000000412000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Cab2686.tmp

MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

memory/956-30-0x0000000073EB0000-0x000000007459E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-25 01:58

Reported

2024-05-25 02:00

Platform

win10v2004-20240508-en

Max time kernel

132s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe"

Signatures

AsyncRat

rat asyncrat

Detects file containing reversed ASEP Autorun registry keys

Description Indicator Process Target
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3032 set thread context of 4872 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3032 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 3732 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 3732 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 3732 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 3032 wrote to memory of 4872 N/A C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe

"C:\Users\Admin\AppData\Local\Temp\b010fc8a5324e8c3f72bd5884f5f31cbc02dcb9df573cf5a82405560f4927687.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

#system32

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

#system32

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

#system32

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

#system32

Network

Country Destination Domain Proto
US 8.8.8.8:53 91.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
GB 20.117.108.240:5612 tcp
US 8.8.8.8:53 240.108.117.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 52.111.227.11:443 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp

Files

memory/3032-0-0x00000000750BE000-0x00000000750BF000-memory.dmp

memory/3032-1-0x00000000004C0000-0x00000000004DE000-memory.dmp

memory/3032-2-0x00000000750B0000-0x0000000075860000-memory.dmp

memory/4872-3-0x0000000000400000-0x0000000000412000-memory.dmp

memory/3032-6-0x00000000750B0000-0x0000000075860000-memory.dmp

memory/4872-5-0x00000000750B0000-0x0000000075860000-memory.dmp

memory/4872-7-0x00000000750B0000-0x0000000075860000-memory.dmp

memory/4872-10-0x00000000055A0000-0x000000000563C000-memory.dmp

memory/4872-11-0x0000000005BF0000-0x0000000006194000-memory.dmp

memory/4872-12-0x00000000056B0000-0x0000000005716000-memory.dmp

memory/4872-13-0x00000000750B0000-0x0000000075860000-memory.dmp

memory/4872-14-0x00000000750B0000-0x0000000075860000-memory.dmp