Analysis
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max time kernel
149s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
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submitted
21-05-2024 18:30
General
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Target
COSCO-BL-DOCREF0019938839492.exe
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Size
933KB
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MD5
e8341c132b421d6f4458a85f83c022b5
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SHA1
843ea31ff92c4a04aee01734fc8accce11d6677a
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SHA256
e7ac92245b62ac27b3a14658cfb1c72f39ef91055a79cdc9c41e4574f6bd5a46
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SHA512
abfadf2e1ce64a6c15abdc36682f744b45d4731a92a92f0f7e2cec4117cd30862f6d870b68bd3e7786ab088a73ae795b2dc29e6599eae42f551366500eefaeb6
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SSDEEP
24576:gWF0HP0YLI9UWaxsthnwxUulx6oOgYum75zLoRHTbhK:gHP0YUu9stYDlogrWfoRzbhK
Malware Config
Extracted
remcos
WK
embargogo237.duckdns.org:10521
embargogo2378.duckdns.org:10522
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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
remcos.exe
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copy_folder
Remcos
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delete_file
false
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hide_file
false
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hide_keylog_file
true
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install_flag
false
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keylog_crypt
true
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
iexplorer
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keylog_path
%AppData%
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mouse_option
false
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mutex
zmt-C10PFT
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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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take_screenshot_option
false
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take_screenshot_time
5
Signatures
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Remcos
Remcos is a closed-source remote control and surveillance software.
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UAC bypass 3 TTPs 1 IoCs
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Windows security bypass 2 TTPs 2 IoCs
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Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
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Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Looks for VMWare Tools registry key 2 TTPs 1 IoCs
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Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Windows security modification 2 TTPs 3 IoCs
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Checks whether UAC is enabled 1 TTPs 2 IoCs
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Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
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Suspicious use of SetThreadContext 1 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 2 IoCs
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Suspicious use of AdjustPrivilegeToken 1 IoCs
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Suspicious use of SetWindowsHookEx 1 IoCs
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Suspicious use of WriteProcessMemory 27 IoCs
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System policy modification 1 TTPs 1 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\COSCO-BL-DOCREF0019938839492.exe"C:\Users\Admin\AppData\Local\Temp\COSCO-BL-DOCREF0019938839492.exe"1⤵
- UAC bypass
- Windows security bypass
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks computer location settings
- Windows security modification
- Checks whether UAC is enabled
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\COSCO-BL-DOCREF0019938839492.exe" -Force2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\notepad.exe"C:\Windows\System32\notepad.exe"2⤵
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C:\Program Files (x86)\Internet Explorer\iexplore.exe"C:\Program Files (x86)\Internet Explorer\iexplore.exe"2⤵
- Suspicious use of SetWindowsHookEx
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C:\Program Files (x86)\Internet Explorer\iexplore.exe"C:\Program Files (x86)\Internet Explorer\iexplore.exe"2⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
3Disable or Modify Tools
3Modify Registry
4Virtualization/Sandbox Evasion
2Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xptsg1cc.d1d.ps1Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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C:\Users\Admin\AppData\Roaming\iexplorer\logs.datFilesize
144B
MD5a302aa6a75058801f5216ff850cffa3a
SHA1750624ff9dc4621680af29295462611b1e8536ad
SHA2562ebcb2f4985d30794c3d8fec8c604ddb1cdb7aece6200528828b8c29886eaab0
SHA512b85c81f2f320361e994bf14ca1c526fc46f535fd8983322e701b191a6aa875055a63ebf67f74b325437b0d2e45b31293c09c8afc231785d63dad8f2431598c63
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memory/1480-0-0x000001FB0AC80000-0x000001FB0AC9E000-memory.dmpFilesize
120KB
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memory/1480-1-0x00007FFF5E983000-0x00007FFF5E985000-memory.dmpFilesize
8KB
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memory/1480-2-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmpFilesize
10.8MB
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memory/1480-3-0x000001FB0C9E0000-0x000001FB0CAB2000-memory.dmpFilesize
840KB
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memory/1480-22-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmpFilesize
10.8MB
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memory/3696-17-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
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memory/5100-16-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmpFilesize
10.8MB
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memory/5100-15-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmpFilesize
10.8MB
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memory/5100-18-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmpFilesize
10.8MB
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memory/5100-21-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmpFilesize
10.8MB
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memory/5100-4-0x0000024275F00000-0x0000024275F22000-memory.dmpFilesize
136KB
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memory/5100-11-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmpFilesize
10.8MB