Analysis
- max time kernel
150s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
23/12/2022, 04:27
General
- Target TNT Original Document PDF.exe
- Size 1015KB
- Sample221223-e2417afh25
- SHA256 a84ffc6423f9efc057fcffadbf537056debc6b79d3d81a7dc4b16bd61a87b6ba
Malware Config
Extracted
-
remcos
-
RemoteHost
-
51.75.209.245:2404
-
audio_folder
MicRecords
-
audio_record_time
5
-
connect_delay
0
-
connect_interval
1
-
copy_file
remcos.exe
-
copy_folder
Remcos
-
delete_file
false
-
hide_file
false
-
hide_keylog_file
false
-
install_flag
false
-
keylog_crypt
false
-
keylog_file
logs.dat
-
keylog_flag
false
-
keylog_folder
remcos
-
mouse_option
false
-
mutex
Rmc-CMFPLR
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
-
screenshot_path
%AppData%
-
screenshot_time
10
-
startup_value
Remcos
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 13 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 24 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\TNT Original Document PDF.exe"C:\Users\Admin\AppData\Local\Temp\TNT Original Document PDF.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- 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\TNT Original Document PDF.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\OyZygBSHhZBG.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OyZygBSHhZBG" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3CEA.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\TNT Original Document PDF.exe"C:\Users\Admin\AppData\Local\Temp\TNT Original Document PDF.exe"2⤵
-
-
C:\Users\Admin\AppData\Local\Temp\TNT Original Document PDF.exe"C:\Users\Admin\AppData\Local\Temp\TNT Original Document PDF.exe"2⤵
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
powershell.exe.log
StartupProfileData-NonInteractive
tmp3CEA.tmp
memory/1792-151-0x0000000000400000-0x000000000047F000-memory.dmp
memory/1792-150-0x0000000000400000-0x000000000047F000-memory.dmp
memory/1792-148-0x0000000000400000-0x000000000047F000-memory.dmp
memory/1792-149-0x0000000000400000-0x000000000047F000-memory.dmp
memory/1792-166-0x0000000000400000-0x000000000047F000-memory.dmp
memory/1948-144-0x0000000005300000-0x0000000005366000-memory.dmp
memory/1948-153-0x00000000061A0000-0x00000000061D2000-memory.dmp
memory/1948-163-0x00000000071E0000-0x00000000071E8000-memory.dmp
memory/1948-161-0x00000000070F0000-0x00000000070FE000-memory.dmp
memory/1948-157-0x0000000007510000-0x0000000007B8A000-memory.dmp
memory/1948-155-0x0000000075680000-0x00000000756CC000-memory.dmp
memory/2248-132-0x00000000009E0000-0x0000000000AE4000-memory.dmp
memory/2248-136-0x0000000008060000-0x00000000080FC000-memory.dmp
memory/2248-135-0x0000000005650000-0x000000000565A000-memory.dmp
memory/2248-134-0x00000000054A0000-0x0000000005532000-memory.dmp
memory/2248-133-0x0000000005A50000-0x0000000005FF4000-memory.dmp
memory/3444-145-0x0000000005600000-0x0000000005666000-memory.dmp
memory/3444-156-0x00000000069E0000-0x00000000069FE000-memory.dmp
memory/3444-154-0x0000000075680000-0x00000000756CC000-memory.dmp
memory/3444-158-0x00000000077B0000-0x00000000077CA000-memory.dmp
memory/3444-159-0x0000000007820000-0x000000000782A000-memory.dmp
memory/3444-160-0x0000000007A30000-0x0000000007AC6000-memory.dmp
memory/3444-142-0x00000000053F0000-0x0000000005412000-memory.dmp
memory/3444-162-0x0000000007AF0000-0x0000000007B0A000-memory.dmp
memory/3444-152-0x00000000064B0000-0x00000000064CE000-memory.dmp
memory/3444-141-0x0000000005810000-0x0000000005E38000-memory.dmp
memory/3444-140-0x0000000002BA0000-0x0000000002BD6000-memory.dmp