Analysis
- max time kernel
149s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
10/08/2026, 14:29
General
- Target d9e876c0ef78f0d6087d0c41c8d47ebe9fc8137055c9d74bbb7c1fd7fb8e1fdf.exe
- Size 793KB
- Sample260810-rtx9wsbk9w
- SHA256 d9e876c0ef78f0d6087d0c41c8d47ebe9fc8137055c9d74bbb7c1fd7fb8e1fdf
Malware Config
Extracted
-
Protocol
smtp
-
Host
mail.atf-transformer.af
-
Port
587
-
Username
-
Password
@tf0794888229
Extracted
-
masslogger
-
exfiltration_mode
#SMTPEnabled
-
expire_time_date
00-00-0000
-
host_password
@tf0794888229
-
host_port
587
-
host_receiver
result box: [email protected]
- host_sender
-
host_server
mail.atf-transformer.af
-
ssl_slate
False
Signatures
- Family: MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
- Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 1 TTPs 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- SmartAssembly .NET packer 1 IoCs
Detects SmartAssembly .NET packer.
- Suspicious use of SetThreadContext 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 6 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 11 IoCs
- Suspicious use of AdjustPrivilegeToken 7 IoCs
- Suspicious use of WriteProcessMemory 13 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\d9e876c0ef78f0d6087d0c41c8d47ebe9fc8137055c9d74bbb7c1fd7fb8e1fdf.exe"C:\Users\Admin\AppData\Local\Temp\d9e876c0ef78f0d6087d0c41c8d47ebe9fc8137055c9d74bbb7c1fd7fb8e1fdf.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\d9e876c0ef78f0d6087d0c41c8d47ebe9fc8137055c9d74bbb7c1fd7fb8e1fdf.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"2⤵
- Accesses Microsoft Outlook profiles
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
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C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -File "C:\Users\Admin\AppData\Local\Temp\gwyjp41srek.ps1"1⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\BRLBuBwIWh.exe"C:\Users\Admin\AppData\Roaming\BRLBuBwIWh.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\BRLBuBwIWh.exe"3⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
-
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Network
MITRE ATT&CK Enterprise v16
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
Loading Replay Monitor...
Downloads
powershell.exe.log
StartupProfileData-NonInteractive
__PSScriptPolicyTest_qi2zx3bu.s51.ps1
gwyjp41srek.ps1
BRLBuBwIWh.exe
memory/3364-41-0x0000021F28A90000-0x0000021F28AB2000-memory.dmp
memory/3524-96-0x0000000007C50000-0x0000000007C64000-memory.dmp
memory/3524-95-0x0000000007C10000-0x0000000007C21000-memory.dmp
memory/3524-94-0x00000000076C0000-0x0000000007763000-memory.dmp
memory/3524-86-0x0000000070CC0000-0x0000000070D0C000-memory.dmp
memory/3524-85-0x0000000006BF0000-0x0000000006C3C000-memory.dmp
memory/3524-76-0x0000000006010000-0x0000000006364000-memory.dmp
memory/3920-72-0x00000000054C0000-0x00000000054D0000-memory.dmp
memory/3920-63-0x00000000063A0000-0x00000000063F0000-memory.dmp
memory/3920-14-0x0000000000400000-0x000000000041E000-memory.dmp
memory/3920-71-0x00000000066C0000-0x0000000006882000-memory.dmp
memory/3920-28-0x00000000054C0000-0x00000000054D0000-memory.dmp
memory/4208-18-0x0000000002960000-0x0000000002970000-memory.dmp
memory/4208-62-0x00000000076F0000-0x0000000007701000-memory.dmp
memory/4208-21-0x0000000005380000-0x00000000053E6000-memory.dmp
memory/4208-20-0x00000000052E0000-0x0000000005302000-memory.dmp
memory/4208-32-0x00000000061B0000-0x00000000061CE000-memory.dmp
memory/4208-33-0x0000000006240000-0x000000000628C000-memory.dmp
memory/4208-27-0x0000000005B70000-0x0000000005BD6000-memory.dmp
memory/4208-19-0x0000000005410000-0x0000000005A38000-memory.dmp
memory/4208-43-0x0000000006780000-0x00000000067B2000-memory.dmp
memory/4208-44-0x0000000070D50000-0x0000000070D9C000-memory.dmp
memory/4208-52-0x0000000006760000-0x000000000677E000-memory.dmp
memory/4208-53-0x00000000073D0000-0x0000000007473000-memory.dmp
memory/4208-16-0x0000000002960000-0x0000000002970000-memory.dmp
memory/4208-58-0x0000000007B20000-0x000000000819A000-memory.dmp
memory/4208-59-0x00000000074D0000-0x00000000074EA000-memory.dmp
memory/4208-60-0x0000000004F00000-0x0000000004F0A000-memory.dmp
memory/4208-61-0x0000000007780000-0x0000000007816000-memory.dmp
memory/4208-29-0x0000000005BE0000-0x0000000005F34000-memory.dmp
memory/4208-15-0x00000000028D0000-0x0000000002906000-memory.dmp
memory/4208-64-0x0000000007720000-0x000000000772E000-memory.dmp
memory/4208-65-0x0000000007730000-0x0000000007744000-memory.dmp
memory/4208-66-0x0000000007820000-0x000000000783A000-memory.dmp
memory/4208-67-0x0000000007770000-0x0000000007778000-memory.dmp
memory/4824-0-0x0000000000110000-0x00000000001DC000-memory.dmp
memory/4824-9-0x00000000067B0000-0x0000000006864000-memory.dmp
memory/4824-8-0x0000000004D00000-0x0000000004D10000-memory.dmp
memory/4824-7-0x00000000057B0000-0x00000000057C0000-memory.dmp
memory/4824-6-0x00000000057C0000-0x000000000585C000-memory.dmp
memory/4824-5-0x0000000004CC0000-0x0000000004CCA000-memory.dmp
memory/4824-4-0x0000000004D00000-0x0000000004D10000-memory.dmp
memory/4824-3-0x0000000004D10000-0x0000000005064000-memory.dmp
memory/4824-2-0x0000000004BC0000-0x0000000004C52000-memory.dmp
memory/4824-1-0x0000000005080000-0x0000000005624000-memory.dmp