Malware Analysis Report

2024-12-07 03:29

Sample ID 241113-aw7snsxjgj
Target Fallo_Fiscal_Procesado_N°_49298490.tbz2
SHA256 25cde0a920664811bb924b2b96f14624fc74405edab173082202092c60eeedcc
Tags
asyncrat actualizado-12 discovery persistence 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

25cde0a920664811bb924b2b96f14624fc74405edab173082202092c60eeedcc

Threat Level: Known bad

The file Fallo_Fiscal_Procesado_N°_49298490.tbz2 was found to be: Known bad.

Malicious Activity Summary

asyncrat actualizado-12 discovery persistence rat

AsyncRat

Asyncrat family

Adds Run key to start application

Suspicious use of SetThreadContext

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 00:34

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-13 00:34

Reported

2024-11-13 00:35

Platform

win7-20240903-en

Max time kernel

16s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe"

Signatures

AsyncRat

rat asyncrat

Asyncrat family

asyncrat

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\IsaccEditorDesigner = "C:\\Users\\Admin\\Music\\IsaccDesignUpdater\\IsaccVideo.exe" C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2292 set thread context of 1900 N/A C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe

"C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 Mystudio201.casacam.net udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp

Files

memory/2292-1-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/2292-0-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/2292-2-0x000000000050D000-0x0000000000525000-memory.dmp

memory/2292-3-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/2292-6-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/2292-5-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/2292-7-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/1900-10-0x0000000000080000-0x0000000000092000-memory.dmp

memory/2292-11-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/2292-12-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/1900-16-0x0000000000080000-0x0000000000092000-memory.dmp

memory/1900-14-0x0000000000080000-0x0000000000092000-memory.dmp

memory/1900-9-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

memory/1900-8-0x0000000000080000-0x0000000000092000-memory.dmp

memory/1900-17-0x0000000074ACE000-0x0000000074ACF000-memory.dmp

memory/1900-18-0x0000000074AC0000-0x00000000751AE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-13 00:34

Reported

2024-11-13 00:45

Platform

win10v2004-20241007-en

Max time kernel

590s

Max time network

598s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe"

Signatures

AsyncRat

rat asyncrat

Asyncrat family

asyncrat

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\IsaccEditorDesigner = "C:\\Users\\Admin\\Music\\IsaccDesignUpdater\\IsaccVideo.exe" C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4440 set thread context of 2888 N/A C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe

"C:\Users\Admin\AppData\Local\Temp\Fallo_Fiscal_Procesado_N°_49298490..exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 Mystudio201.casacam.net udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 73.190.18.2.in-addr.arpa udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
US 8.8.8.8:53 Mystudio201.casacam.net udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
US 8.8.8.8:53 1.173.189.20.in-addr.arpa udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
US 8.8.8.8:53 Mystudio201.casacam.net udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
US 8.8.8.8:53 Mystudio201.casacam.net udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
US 8.8.8.8:53 Mystudio201.casacam.net udp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp
CO 186.169.53.104:8853 Mystudio201.casacam.net tcp

Files

memory/4440-0-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/4440-1-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/2888-8-0x0000000000B60000-0x0000000000B72000-memory.dmp

memory/4440-7-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/4440-6-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/4440-5-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/4440-9-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/4440-11-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/4440-4-0x0000000000400000-0x00000000007F5000-memory.dmp

memory/4440-2-0x000000000050D000-0x0000000000525000-memory.dmp

memory/2888-12-0x0000000074A9E000-0x0000000074A9F000-memory.dmp

memory/2888-13-0x0000000074A90000-0x0000000075240000-memory.dmp

memory/2888-15-0x0000000074A90000-0x0000000075240000-memory.dmp