Analysis
- max time kernel
148s - max time network
148s - platform
windows7_x64 - resource
win7-20240215-en - resource tags
- submitted
01/03/2024, 05:18
General
- Target 9f2830a19edaacf690e6626e58b201d747a5a510777e5e92acf42a4efd28ddb6.exe
- Size 577KB
- Sample240301-fzpddsdf32
- SHA256 9f2830a19edaacf690e6626e58b201d747a5a510777e5e92acf42a4efd28ddb6
Malware Config
Extracted
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remcos
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RemoteHost
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103.77.243.215:2404
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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
false
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install_flag
false
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
-
keylog_folder
remcos
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mouse_option
false
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mutex
Rmc-SHZ02U
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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
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 13 IoCs
- Detects executables built or packed with MPress PE compressor 19 IoCs
- Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 3 IoCs
- Detects executables referencing many email and collaboration clients. Observed in information stealers 3 IoCs
- NirSoft MailPassView 3 IoCs
Password recovery tool for various email clients
- NirSoft WebBrowserPassView 3 IoCs
Password recovery tool for various web browsers
- Nirsoft 8 IoCs
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 6 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
- Drops file in System32 directory 1 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 4 IoCs
- Drops file in Windows directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- NSIS installer 2 IoCs
- Suspicious behavior: EnumeratesProcesses 10 IoCs
- Suspicious behavior: MapViewOfSection 4 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 26 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\9f2830a19edaacf690e6626e58b201d747a5a510777e5e92acf42a4efd28ddb6.exe"C:\Users\Admin\AppData\Local\Temp\9f2830a19edaacf690e6626e58b201d747a5a510777e5e92acf42a4efd28ddb6.exe"1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -windowstyle hidden $Unaffranchised=Get-Content 'C:\Users\Admin\AppData\Local\decahedrodra\sphacelus\Snniker\Seychelliske\brandbar\Choktilstandens.Max';$Syrings=$Unaffranchised.SubString(56820,3);.$Syrings($Unaffranchised)2⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c "set /A 1^^0"3⤵
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C:\Users\Admin\AppData\Local\Temp\Sistani.exe"C:\Users\Admin\AppData\Local\Temp\Sistani.exe"3⤵
- Loads dropped DLL
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Sistani.exeC:\Users\Admin\AppData\Local\Temp\Sistani.exe /stext "C:\Users\Admin\AppData\Local\Temp\vnbswnklwmbzikbf"4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
-
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C:\Users\Admin\AppData\Local\Temp\Sistani.exeC:\Users\Admin\AppData\Local\Temp\Sistani.exe /stext "C:\Users\Admin\AppData\Local\Temp\xpocxgumkutetqxjqyxx"4⤵
- Executes dropped EXE
- Accesses Microsoft Outlook accounts
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C:\Users\Admin\AppData\Local\Temp\Sistani.exeC:\Users\Admin\AppData\Local\Temp\Sistani.exe /stext "C:\Users\Admin\AppData\Local\Temp\hktvyyfgyclivelvzjjqptj"4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
logs.dat
vnbswnklwmbzikbf
Future.Flo
Choktilstandens.Max
Sistani.exe
nsExec.dll
memory/856-65-0x0000000000400000-0x0000000000457000-memory.dmp
memory/856-85-0x0000000000400000-0x0000000000457000-memory.dmp
memory/856-70-0x0000000000400000-0x0000000000457000-memory.dmp
memory/856-61-0x0000000000400000-0x0000000000457000-memory.dmp
memory/856-51-0x0000000000400000-0x0000000000457000-memory.dmp
memory/2280-75-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2280-63-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2280-52-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2280-57-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2280-47-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2304-66-0x0000000000400000-0x0000000000424000-memory.dmp
memory/2304-68-0x0000000000400000-0x0000000000424000-memory.dmp
memory/2304-62-0x0000000000400000-0x0000000000424000-memory.dmp
memory/2304-58-0x0000000000400000-0x0000000000424000-memory.dmp
memory/2536-32-0x00000000021E0000-0x0000000002220000-memory.dmp
memory/2536-24-0x00000000067B0000-0x000000000C585000-memory.dmp
memory/2536-15-0x0000000074030000-0x00000000745DB000-memory.dmp
memory/2536-16-0x0000000074030000-0x00000000745DB000-memory.dmp
memory/2536-17-0x00000000021E0000-0x0000000002220000-memory.dmp
memory/2536-18-0x00000000021E0000-0x0000000002220000-memory.dmp
memory/2536-21-0x00000000021E0000-0x0000000002220000-memory.dmp
memory/2536-23-0x00000000055E0000-0x00000000055E4000-memory.dmp
memory/2536-30-0x0000000077930000-0x0000000077A06000-memory.dmp
memory/2536-29-0x0000000074030000-0x00000000745DB000-memory.dmp
memory/2536-25-0x0000000077740000-0x00000000778E9000-memory.dmp
memory/2884-82-0x0000000022CC0000-0x0000000022CD9000-memory.dmp
memory/2884-38-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-53-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-34-0x0000000077966000-0x0000000077967000-memory.dmp
memory/2884-35-0x0000000077930000-0x0000000077A06000-memory.dmp
memory/2884-79-0x0000000022CC0000-0x0000000022CD9000-memory.dmp
memory/2884-42-0x0000000077930000-0x0000000077A06000-memory.dmp
memory/2884-83-0x0000000022CC0000-0x0000000022CD9000-memory.dmp
memory/2884-84-0x0000000022CC0000-0x0000000022CD9000-memory.dmp
memory/2884-36-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-88-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-33-0x0000000077740000-0x00000000778E9000-memory.dmp
memory/2884-91-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-94-0x0000000022CC0000-0x0000000022CD9000-memory.dmp
memory/2884-95-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-98-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-101-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-104-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-107-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-110-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-113-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-116-0x0000000000450000-0x00000000014B2000-memory.dmp
memory/2884-118-0x0000000000450000-0x00000000014B2000-memory.dmp