Malware Analysis Report

2025-01-02 12:10

Sample ID 240419-ske8dsfd96
Target e0c75272441cfaa0d0544851bf63905460cd1c799c510242538bb36e988a55aa.zip
SHA256 f965cd05f33977ad6ae1df5832766edf0846d4adc976aa0dfe89e7ff80e9b828
Tags
asyncrat default rat
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

f965cd05f33977ad6ae1df5832766edf0846d4adc976aa0dfe89e7ff80e9b828

Threat Level: Known bad

The file e0c75272441cfaa0d0544851bf63905460cd1c799c510242538bb36e988a55aa.zip was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Suspicious use of SetThreadContext

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-19 15:10

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-19 15:10

Reported

2024-04-19 15:13

Platform

win7-20240215-en

Max time kernel

121s

Max time network

122s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\e0c75272441cfaa0d0544851bf63905460cd1c799c510242538bb36e988a55aa.ps1

Signatures

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\e0c75272441cfaa0d0544851bf63905460cd1c799c510242538bb36e988a55aa.ps1

Network

N/A

Files

memory/2080-5-0x0000000002220000-0x0000000002228000-memory.dmp

memory/2080-4-0x000000001B620000-0x000000001B902000-memory.dmp

memory/2080-6-0x000007FEF5CB0000-0x000007FEF664D000-memory.dmp

memory/2080-7-0x0000000002DC0000-0x0000000002E40000-memory.dmp

memory/2080-8-0x000007FEF5CB0000-0x000007FEF664D000-memory.dmp

memory/2080-10-0x0000000002DC0000-0x0000000002E40000-memory.dmp

memory/2080-9-0x0000000002DC0000-0x0000000002E40000-memory.dmp

memory/2080-11-0x0000000002DC0000-0x0000000002E40000-memory.dmp

memory/2080-12-0x000007FEF5CB0000-0x000007FEF664D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-19 15:10

Reported

2024-04-19 15:13

Platform

win10v2004-20240412-en

Max time kernel

149s

Max time network

149s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\e0c75272441cfaa0d0544851bf63905460cd1c799c510242538bb36e988a55aa.ps1

Signatures

AsyncRat

rat asyncrat

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3804 set thread context of 4396 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3804 wrote to memory of 5096 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 5096 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 5096 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 3908 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 3908 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 3908 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 4396 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 4396 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 4396 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 4396 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 4396 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 4396 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 4396 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 4396 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
PID 3804 wrote to memory of 2320 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\schtasks.exe
PID 3804 wrote to memory of 2320 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\system32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\e0c75272441cfaa0d0544851bf63905460cd1c799c510242538bb36e988a55aa.ps1

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

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"

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

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"

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

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"

C:\Windows\system32\schtasks.exe

"C:\Windows\system32\schtasks.exe" /delete /tn det /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 146.177.190.20.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 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 67.32.209.4.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 132.250.30.184.in-addr.arpa udp
FR 185.81.157.135:7777 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
FR 185.81.157.135:7777 tcp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
FR 185.81.157.135:7777 tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
FR 185.81.157.135:7777 tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 98.56.20.217.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 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
FR 185.81.157.135:7777 tcp
FR 185.81.157.135:7777 tcp

Files

memory/3804-6-0x0000022BA3B60000-0x0000022BA3B82000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cjslajw0.jse.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3804-10-0x00007FFB274C0000-0x00007FFB27F81000-memory.dmp

memory/3804-11-0x0000022BA3B50000-0x0000022BA3B60000-memory.dmp

memory/3804-12-0x0000022BA3B50000-0x0000022BA3B60000-memory.dmp

memory/3804-13-0x0000022BA3B30000-0x0000022BA3B4A000-memory.dmp

memory/4396-14-0x0000000000400000-0x0000000000416000-memory.dmp

memory/3804-15-0x0000022BA3B50000-0x0000022BA3B60000-memory.dmp

memory/3804-18-0x00007FFB274C0000-0x00007FFB27F81000-memory.dmp

memory/4396-19-0x00000000746D0000-0x0000000074E80000-memory.dmp

memory/4396-20-0x0000000002EE0000-0x0000000002EF0000-memory.dmp

memory/4396-21-0x0000000005C40000-0x00000000061E4000-memory.dmp

memory/4396-22-0x0000000005880000-0x0000000005912000-memory.dmp

memory/4396-23-0x0000000005A10000-0x0000000005A1A000-memory.dmp

memory/4396-24-0x00000000746D0000-0x0000000074E80000-memory.dmp

memory/4396-25-0x0000000002EE0000-0x0000000002EF0000-memory.dmp