Malware Analysis Report

2024-11-30 04:13

Sample ID 240408-bj8d4scc2t
Target 28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe
SHA256 28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800
Tags
agenttesla keylogger persistence 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

28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800

Threat Level: Known bad

The file 28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe was found to be: Known bad.

Malicious Activity Summary

agenttesla keylogger persistence spyware stealer trojan

AgentTesla

Detects executables packed with or use KoiVM

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

Detect packed .NET executables. Mostly AgentTeslaV4.

Detects executables referencing Windows vault credential objects. Observed in infostealers

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

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 file transfer clients. Observed in information stealers

Adds Run key to start application

Looks up external IP address via web service

Suspicious use of SetThreadContext

Unsigned PE

Program crash

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-08 01:11

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-08 01:11

Reported

2024-04-08 01:14

Platform

win7-20231129-en

Max time kernel

117s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.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
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
N/A N/A N/A N/A
N/A N/A N/A N/A

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

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
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
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
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
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
N/A N/A N/A N/A
N/A N/A N/A N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\Run\ZUHFqcY = "C:\\Users\\Admin\\AppData\\Roaming\\ZUHFqcY\\ZUHFqcY.exe" C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1044 set thread context of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1044 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 1044 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 1044 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 1044 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 1044 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 1044 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 1044 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 1044 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 1044 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 1044 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\system32\WerFault.exe
PID 1044 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\system32\WerFault.exe
PID 1044 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\system32\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe

"C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe"

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

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

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 1044 -s 656

Network

Country Destination Domain Proto
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp

Files

memory/1044-0-0x0000000000AA0000-0x0000000000AAA000-memory.dmp

memory/1044-1-0x000007FEF5B50000-0x000007FEF653C000-memory.dmp

memory/1044-2-0x000000001A6F0000-0x000000001A770000-memory.dmp

memory/1044-3-0x0000000000770000-0x0000000000806000-memory.dmp

memory/1948-4-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1948-6-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1948-8-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1948-10-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1948-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/1948-13-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1948-17-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1948-15-0x0000000000400000-0x0000000000442000-memory.dmp

memory/1948-18-0x0000000074990000-0x000000007507E000-memory.dmp

memory/1948-19-0x0000000004950000-0x0000000004990000-memory.dmp

memory/1044-21-0x000007FEF5B50000-0x000007FEF653C000-memory.dmp

memory/1044-22-0x000000001A6F0000-0x000000001A770000-memory.dmp

memory/1948-23-0x0000000074990000-0x000000007507E000-memory.dmp

memory/1948-24-0x0000000004950000-0x0000000004990000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-08 01:11

Reported

2024-04-08 01:14

Platform

win10v2004-20240226-en

Max time kernel

91s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.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 binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-275798769-4264537674-1142822080-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ZUHFqcY = "C:\\Users\\Admin\\AppData\\Roaming\\ZUHFqcY\\ZUHFqcY.exe" C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe N/A
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 2240 wrote to memory of 3240 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2240 wrote to memory of 3240 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2240 wrote to memory of 3240 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2240 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 2240 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 2240 wrote to memory of 3044 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
PID 2240 wrote to memory of 5000 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5000 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5000 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5000 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5000 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5000 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5000 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5000 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5048 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5048 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
PID 2240 wrote to memory of 5048 N/A C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe

Processes

C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe

"C:\Users\Admin\AppData\Local\Temp\28f97b4c8d62f489f741bede6f460561091d16444a5511fde96ff97d79224800.exe"

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

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

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

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

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

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

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 5000 -ip 5000

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 5000 -s 1092

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 130.118.77.104.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

memory/2240-0-0x00000293D9120000-0x00000293D912A000-memory.dmp

memory/2240-1-0x00000293F3550000-0x00000293F35C6000-memory.dmp

memory/2240-2-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp

memory/2240-3-0x00000293F3700000-0x00000293F3710000-memory.dmp

memory/2240-4-0x00000293DADE0000-0x00000293DADFE000-memory.dmp

memory/2240-5-0x00000293F35D0000-0x00000293F3666000-memory.dmp

memory/5000-6-0x0000000000400000-0x0000000000442000-memory.dmp

memory/5000-7-0x0000000075080000-0x0000000075830000-memory.dmp

memory/5000-8-0x00000000056F0000-0x0000000005C94000-memory.dmp

memory/2240-9-0x00007FFD6A3A0000-0x00007FFD6AE61000-memory.dmp

memory/5000-10-0x0000000005020000-0x0000000005030000-memory.dmp

memory/5000-11-0x0000000005240000-0x00000000052A6000-memory.dmp

memory/5000-13-0x0000000075080000-0x0000000075830000-memory.dmp