Analysis
- max time kernel
94s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
03/10/2024, 19:06
General
- Target 2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe
- Size 815KB
- Sample241003-xsheyavfnc
- SHA256 2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1
Malware Config
Extracted
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djvu
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http://habrafa.com/test2/get.php
-
extension
.cdtt
-
offline_id
Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1
- payload_url
-
ransomnote
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Signatures
- Detected Djvu ransomware 9 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Floxif, Floodfix
Floxif aka FloodFix is a file-changing trojan and backdoor written in C++.
- Detects Floxif payload 1 IoCs
- Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
- ACProtect 1.3x - 1.4x DLL software 1 IoCs
Detects file using ACProtect software.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 8 IoCs
- Modifies file permissions 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 2 IoCs
- UPX packed file 9 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Drops file in Program Files directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 26 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe"C:\Users\Admin\AppData\Local\Temp\2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe"C:\Users\Admin\AppData\Local\Temp\2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe"2⤵
- Checks computer location settings
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\0ef412f8-68b9-48e5-b174-fadbb459c441" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
-
-
C:\Users\Admin\AppData\Local\Temp\2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe"C:\Users\Admin\AppData\Local\Temp\2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe"C:\Users\Admin\AppData\Local\Temp\2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1072 -s 5765⤵
- Loads dropped DLL
- Program crash
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-
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1072 -ip 10721⤵
- Loads dropped DLL
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1AppInit DLLs
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1AppInit DLLs
1Replay Monitor
Loading Replay Monitor...
Downloads
symsrv.dll
2001912979da79bad5fece70437c11778cc37315acd9fa22f71732260f8412e1N.exe
memory/1072-58-0x0000000010000000-0x0000000010030000-memory.dmp
memory/1072-47-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1072-52-0x0000000010000000-0x0000000010030000-memory.dmp
memory/1072-45-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1072-44-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1240-40-0x0000000000740000-0x0000000000770000-memory.dmp
memory/1240-39-0x0000000000740000-0x0000000000770000-memory.dmp
memory/1240-50-0x0000000010000000-0x0000000010030000-memory.dmp
memory/1240-51-0x0000000000400000-0x00000000004BD000-memory.dmp
memory/1240-42-0x0000000000400000-0x00000000004BD000-memory.dmp
memory/1240-38-0x0000000010000000-0x0000000010030000-memory.dmp
memory/1540-8-0x0000000002BA0000-0x0000000002CBB000-memory.dmp
memory/1540-15-0x0000000010000000-0x0000000010030000-memory.dmp
memory/1540-7-0x0000000002490000-0x000000000252E000-memory.dmp
memory/1540-4-0x0000000010000000-0x0000000010030000-memory.dmp
memory/3792-11-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3792-36-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3792-37-0x0000000010000000-0x0000000010030000-memory.dmp
memory/3792-10-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3792-9-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3792-16-0x0000000010000000-0x0000000010030000-memory.dmp
memory/3792-17-0x0000000000400000-0x0000000000537000-memory.dmp