Analysis
- max time kernel
140s - max time network
47s - platform
windows7_x64 - resource
win7-20220901-en - resource tags
- submitted
07/10/2022, 07:31
General
- Target SecuriteInfo.com.Win32.CrypterX-gen.14393.22730.exe
- Size 1.2MB
- Sample221007-jcdj6abhb3
- SHA256 b893cb34f5bdccee94379aed6977ed09b939716cb1e982fb9a88a6ca1e4c1029
Malware Config
Extracted
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remcos
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XP
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xpremcuz300622.ddns.net:3542
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audio_folder
MicRecords
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audio_record_time
5
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connect_delay
0
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connect_interval
1
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copy_file
oos.exe
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delete_file
false
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hide_file
true
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hide_keylog_file
false
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install_flag
true
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install_path
%AppData%
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
remcos
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mouse_option
false
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mutex
Remcos-MMP2I7
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screenshot_crypt
false
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screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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startup_value
kkl
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 1 IoCs
- Adds Run key to start application 2 TTPs 4 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 33 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.14393.22730.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.14393.22730.exe"1⤵
- 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\SecuriteInfo.com.Win32.CrypterX-gen.14393.22730.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.14393.22730.exe"{path}"2⤵
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C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.14393.22730.exe"{path}"2⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\oos.exeC:\Users\Admin\AppData\Roaming\oos.exe5⤵
- 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
install.vbs
oos.exe
oos.exe
oos.exe
memory/1108-60-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-75-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-77-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-62-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-64-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-65-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-66-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-67-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-69-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-71-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1108-59-0x0000000000400000-0x000000000047E000-memory.dmp
memory/1752-54-0x0000000000030000-0x0000000000174000-memory.dmp
memory/1752-58-0x0000000008670000-0x00000000086EE000-memory.dmp
memory/1752-57-0x00000000085B0000-0x0000000008670000-memory.dmp
memory/1752-56-0x0000000000470000-0x0000000000490000-memory.dmp
memory/1752-55-0x0000000075111000-0x0000000075113000-memory.dmp
memory/1892-85-0x0000000000D80000-0x0000000000EC4000-memory.dmp