Analysis
- max time kernel
147s - max time network
123s - platform
windows10_x64 - resource
win10v20201028 - submitted
07/01/2021, 08:18
General
- Target QWP-0716.xls.scr
- Size 787KB
- Sample210107-elmgettk92
- SHA256 bd4bbfaa22dc3cb00b5cbc8b64868b80ca02609fce5ddd910b289a9a06f1ed53
Malware Config
Signatures
- Modifies WinLogon for persistence 2 TTPs 1 IoCs
- Executes dropped EXE 2 IoCs
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: EnumeratesProcesses 20 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\QWP-0716.xls.scr"C:\Users\Admin\AppData\Local\Temp\QWP-0716.xls.scr" /S1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\pdf.exe,"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exeREG ADD "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v "Shell" /t REG_SZ /d "explorer.exe,C:\Users\Admin\pdf.exe,"3⤵
- Modifies WinLogon for persistence
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C:\Users\Admin\pdf.exe"C:\Users\Admin\pdf.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/2260-22-0x0000000004A50000-0x0000000004A51000-memory.dmp
memory/2260-21-0x0000000008350000-0x000000000835B000-memory.dmp
memory/2260-14-0x0000000073970000-0x000000007405E000-memory.dmp
memory/2432-8-0x0000000008380000-0x0000000008381000-memory.dmp
memory/2432-2-0x0000000073970000-0x000000007405E000-memory.dmp
memory/2432-7-0x0000000007F30000-0x0000000007F31000-memory.dmp
memory/2432-6-0x0000000005940000-0x000000000595E000-memory.dmp
memory/2432-5-0x00000000059A0000-0x00000000059A1000-memory.dmp
memory/2432-3-0x0000000000FC0000-0x0000000000FC1000-memory.dmp
memory/3900-23-0x0000000000400000-0x0000000000468000-memory.dmp
memory/3900-27-0x0000000073970000-0x000000007405E000-memory.dmp
memory/3900-30-0x0000000005550000-0x0000000005551000-memory.dmp
memory/3900-32-0x0000000006190000-0x0000000006191000-memory.dmp
memory/3900-34-0x0000000006110000-0x0000000006111000-memory.dmp