Malware Analysis Report

2024-10-23 21:59

Sample ID 240612-b89cpsybmd
Target 985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe
SHA256 985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a
Tags
agenttesla keylogger spyware stealer 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

985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a

Threat Level: Known bad

The file 985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe was found to be: Known bad.

Malicious Activity Summary

agenttesla keylogger spyware stealer trojan

AgentTesla

Detects executables packed with or use KoiVM

Detect packed .NET executables. Mostly AgentTeslaV4.

Detects executables referencing many email and collaboration clients. Observed in information stealers

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

Detects executables referencing many file transfer clients. Observed in information stealers

Detects executables referencing Windows vault credential objects. Observed in infostealers

Reads data files stored by FTP clients

Reads WinSCP keys stored on the system

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-12 01:50

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-12 01:50

Reported

2024-06-12 01:52

Platform

win7-20231129-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe"

Signatures

AgentTesla

keylogger trojan stealer spyware agenttesla

Detect packed .NET executables. Mostly AgentTeslaV4.

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

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

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

Detects executables packed with or use KoiVM

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

Detects executables referencing Windows vault credential objects. Observed in infostealers

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

Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

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

Detects executables referencing many email and collaboration clients. Observed in information stealers

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

Detects executables referencing many file transfer clients. Observed in information stealers

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

Reads WinSCP keys stored on the system

spyware stealer

Reads data files stored by FTP clients

spyware stealer

Reads user/profile data of local email clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1908 set thread context of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe

Suspicious behavior: EnumeratesProcesses

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

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 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 1900 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
PID 1908 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\system32\WerFault.exe
PID 1908 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\system32\WerFault.exe
PID 1908 wrote to memory of 3020 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\system32\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe

"C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe"

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

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

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 1908 -s 652

Network

Country Destination Domain Proto
US 8.8.8.8:53 mail.b-trust.org udp

Files

memory/1908-0-0x000007FEF5043000-0x000007FEF5044000-memory.dmp

memory/1908-1-0x0000000000120000-0x0000000000376000-memory.dmp

memory/1908-2-0x000007FEF5040000-0x000007FEF5A2C000-memory.dmp

memory/1908-3-0x000000001B300000-0x000000001B396000-memory.dmp

memory/1900-6-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1900-11-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1900-15-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1900-13-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1900-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/1900-5-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1900-4-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1900-8-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1908-16-0x000007FEF5043000-0x000007FEF5044000-memory.dmp

memory/1908-17-0x000007FEF5040000-0x000007FEF5A2C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 01:50

Reported

2024-06-12 01:52

Platform

win10v2004-20240508-en

Max time kernel

52s

Max time network

51s

Command Line

"C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe"

Signatures

AgentTesla

keylogger trojan stealer spyware agenttesla

Detect packed .NET executables. Mostly AgentTeslaV4.

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

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

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

Detects executables packed with or use KoiVM

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

Detects executables referencing Windows vault credential objects. Observed in infostealers

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

Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

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

Detects executables referencing many email and collaboration clients. Observed in information stealers

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

Detects executables referencing many file transfer clients. Observed in information stealers

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

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1552 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1552 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1552 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1552 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1552 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1552 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1552 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 1552 wrote to memory of 800 N/A C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe

Processes

C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe

"C:\Users\Admin\AppData\Local\Temp\985f3a90e2586583a9913bc78484f4b3fb824bb08d9ccac14f229df08928477a.exe"

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 mail.b-trust.org udp

Files

memory/1552-1-0x000002A63D230000-0x000002A63D486000-memory.dmp

memory/1552-0-0x00007FF8EEE23000-0x00007FF8EEE25000-memory.dmp

memory/1552-2-0x000002A63F320000-0x000002A63F3B6000-memory.dmp

memory/1552-3-0x00007FF8EEE20000-0x00007FF8EF8E1000-memory.dmp

memory/800-4-0x0000000000400000-0x0000000000442000-memory.dmp

memory/800-5-0x00000000753FE000-0x00000000753FF000-memory.dmp

memory/800-6-0x0000000005730000-0x0000000005CD4000-memory.dmp

memory/800-7-0x0000000005280000-0x00000000052E6000-memory.dmp

memory/800-8-0x00000000753F0000-0x0000000075BA0000-memory.dmp

memory/1552-9-0x00007FF8EEE20000-0x00007FF8EF8E1000-memory.dmp

memory/800-10-0x0000000006160000-0x00000000061B0000-memory.dmp

memory/800-11-0x0000000006250000-0x00000000062EC000-memory.dmp

memory/800-12-0x00000000064D0000-0x0000000006562000-memory.dmp

memory/800-13-0x0000000006460000-0x000000000646A000-memory.dmp

memory/800-14-0x00000000753FE000-0x00000000753FF000-memory.dmp

memory/800-15-0x00000000753F0000-0x0000000075BA0000-memory.dmp