Malware Analysis Report

2024-10-23 21:08

Sample ID 201109-g9ag1ejbxe
Target opo.exe
SHA256 4a2c1f3c1df5c34f1c99c8f7cc8b18fae2c71189e6e383face3ff7fa31224f52
Tags
snakebot snakebot agenttesla coreentity evasion keylogger rezer0 spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

4a2c1f3c1df5c34f1c99c8f7cc8b18fae2c71189e6e383face3ff7fa31224f52

Threat Level: Known bad

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

Malicious Activity Summary

snakebot snakebot agenttesla coreentity evasion keylogger rezer0 spyware stealer trojan

Snakebot family

CoreEntity .NET Packer

AgentTesla

Contains SnakeBOT related strings

rezer0

AgentTesla Payload

Drops file in Drivers directory

Disables Task Manager via registry modification

Suspicious use of SetThreadContext

Program crash

Modifies registry key

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2020-11-09 19:37

Signatures

Snakebot family

snakebot

Contains SnakeBOT related strings

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

Analysis: behavioral1

Detonation Overview

Submitted

2020-11-09 19:37

Reported

2020-11-09 22:07

Platform

win7v20201028

Max time kernel

69s

Max time network

17s

Command Line

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

Signatures

AgentTesla

keylogger trojan stealer spyware agenttesla

CoreEntity .NET Packer

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

AgentTesla Payload

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

rezer0

rezer0
Description Indicator Process Target
N/A N/A N/A N/A

Disables Task Manager via registry modification

evasion

Drops file in Drivers directory

Description Indicator Process Target
File opened for modification C:\Windows\system32\drivers\etc\hosts C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1764 set thread context of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Modifies registry key

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\REG.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\opo.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\opo.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1764 wrote to memory of 1268 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1268 wrote to memory of 1704 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\REG.exe
PID 1268 wrote to memory of 1704 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\REG.exe
PID 1268 wrote to memory of 1704 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\REG.exe
PID 1268 wrote to memory of 1704 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\REG.exe
PID 1268 wrote to memory of 948 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\netsh.exe
PID 1268 wrote to memory of 948 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\netsh.exe
PID 1268 wrote to memory of 948 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\netsh.exe
PID 1268 wrote to memory of 948 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\netsh.exe

Processes

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

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

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

"{path}"

C:\Windows\SysWOW64\REG.exe

REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f

C:\Windows\SysWOW64\netsh.exe

"netsh" wlan show profile

Network

N/A

Files

memory/1764-0-0x0000000074DD0000-0x00000000754BE000-memory.dmp

memory/1764-1-0x0000000000BA0000-0x0000000000BA1000-memory.dmp

memory/1992-3-0x000007FEF7F80000-0x000007FEF81FA000-memory.dmp

memory/1764-4-0x0000000000900000-0x0000000000903000-memory.dmp

memory/1764-5-0x00000000042C0000-0x0000000004313000-memory.dmp

memory/1268-6-0x0000000000400000-0x0000000000452000-memory.dmp

memory/1268-7-0x000000000044CEEE-mapping.dmp

memory/1268-8-0x0000000000400000-0x0000000000452000-memory.dmp

memory/1268-9-0x0000000000400000-0x0000000000452000-memory.dmp

memory/1268-10-0x0000000074DD0000-0x00000000754BE000-memory.dmp

memory/1704-13-0x0000000000000000-mapping.dmp

memory/948-14-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2020-11-09 19:37

Reported

2020-11-09 22:07

Platform

win10v20201028

Max time kernel

147s

Max time network

150s

Command Line

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

Signatures

AgentTesla

keylogger trojan stealer spyware agenttesla

CoreEntity .NET Packer

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

AgentTesla Payload

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
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

rezer0

rezer0
Description Indicator Process Target
N/A N/A N/A N/A

Disables Task Manager via registry modification

evasion

Drops file in Drivers directory

Description Indicator Process Target
File opened for modification C:\Windows\system32\drivers\etc\hosts C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 728 set thread context of 1952 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Modifies registry key

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\REG.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\opo.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\opo.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\opo.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 728 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 728 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 728 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 728 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 728 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 728 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 728 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 728 wrote to memory of 1952 N/A C:\Users\Admin\AppData\Local\Temp\opo.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1952 wrote to memory of 4020 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\REG.exe
PID 1952 wrote to memory of 4020 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\REG.exe
PID 1952 wrote to memory of 4020 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\REG.exe

Processes

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

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

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

"{path}"

C:\Windows\SysWOW64\REG.exe

REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1952 -s 1460

Network

Country Destination Domain Proto
N/A 8.8.8.8:53 www.google.com.br udp
N/A 172.217.19.195:443 www.google.com.br tcp
N/A 13.107.4.52:80 www.msftconnecttest.com tcp

Files

memory/728-0-0x0000000073EE0000-0x00000000745CE000-memory.dmp

memory/728-1-0x0000000000770000-0x0000000000771000-memory.dmp

memory/728-3-0x0000000007A00000-0x0000000007A01000-memory.dmp

memory/728-4-0x00000000075A0000-0x00000000075A1000-memory.dmp

memory/728-5-0x0000000007500000-0x0000000007501000-memory.dmp

memory/728-14-0x0000000002A10000-0x0000000002A13000-memory.dmp

memory/728-15-0x000000000ABE0000-0x000000000AC33000-memory.dmp

memory/728-16-0x000000000ACE0000-0x000000000ACE1000-memory.dmp

memory/1952-17-0x0000000000400000-0x0000000000452000-memory.dmp

memory/1952-18-0x000000000044CEEE-mapping.dmp

memory/1952-19-0x0000000073EE0000-0x00000000745CE000-memory.dmp

memory/1952-24-0x0000000005030000-0x0000000005031000-memory.dmp

memory/1952-25-0x0000000005C50000-0x0000000005C51000-memory.dmp

memory/4020-26-0x0000000000000000-mapping.dmp

memory/2272-27-0x0000000004AC0000-0x0000000004AC1000-memory.dmp

memory/1952-28-0x000000000044CEEE-mapping.dmp

memory/1952-29-0x000000000044CEEE-mapping.dmp

memory/1952-30-0x000000000044CEEE-mapping.dmp

memory/1952-31-0x000000000044CEEE-mapping.dmp

memory/1952-33-0x000000000044CEEE-mapping.dmp

memory/1952-34-0x000000000044CEEE-mapping.dmp

memory/1952-35-0x000000000044CEEE-mapping.dmp

memory/1952-37-0x000000000044CEEE-mapping.dmp

memory/1952-38-0x000000000044CEEE-mapping.dmp

memory/1952-36-0x000000000044CEEE-mapping.dmp

memory/1952-32-0x000000000044CEEE-mapping.dmp

memory/2272-39-0x00000000052F0000-0x00000000052F1000-memory.dmp