Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/02/2024, 02:39

General

  • Target

    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe

  • Size

    1.0MB

  • MD5

    e5d2981fd9c531b3cfb780cf781bac91

  • SHA1

    aaf7084c369138eb5588051eda8aec9aa3c4ac26

  • SHA256

    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b

  • SHA512

    ec10e5de423564c17caac9e3c8a4ab2d1ed51882c9cfe145374d69e9f18382d7bd23d370f0389fb56c3b77073da11351978e803dc53c7135e618bbf0507be539

  • SSDEEP

    24576:Aazz87bccsW43UyDBU7RCFYK9i3iOpOnC+yqiQDi/DtS:AOz8732BdUCYK9i3X6CPqinDo

Malware Config

Extracted

Family

remcos

Botnet

P2-bin

C2

84.38.132.126:61445

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-ANE1CN

  • 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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 29 IoCs
  • Detects executables built or packed with MPress PE compressor 15 IoCs
  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 4 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 17 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
    "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2580
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3632
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\bZurkfs.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1208
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bZurkfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp882B.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2632
    • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
      "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
        PID:1564
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4376
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\eacoospxjzjn"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3688
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\uypvnaedv"
          3⤵
          • Suspicious use of UnmapMainImage
          PID:5020
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 5020 -s 12
            4⤵
            • Program crash
            PID:2052
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\uypvnaedv"
          3⤵
            PID:4588
          • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
            C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\rekdu"
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:752
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
          2⤵
            PID:1300
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 5020 -ip 5020
          1⤵
            PID:2508

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                • C:\ProgramData\remcos\logs.dat

                  Filesize

                  144B

                  MD5

                  c129b349f5234326f21d2891726db768

                  SHA1

                  6db003c5456f8e31ff97a9797a4d87f0c7ef1cdb

                  SHA256

                  21f2c5a3e5d68a51dd924933b93fe920f38c45d3e61d99849c5e27cad7e79938

                  SHA512

                  a6715a8984d2a4a89db7cae85668187490bf2ec22d507899422f3698892f3cb68f1b50605a6439d460e375f2d8c5f11c9285d31a46cfd5058c23954b7062b19a

                • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

                  Filesize

                  2KB

                  MD5

                  968cb9309758126772781b83adb8a28f

                  SHA1

                  8da30e71accf186b2ba11da1797cf67f8f78b47c

                  SHA256

                  92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

                  SHA512

                  4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

                  Filesize

                  18KB

                  MD5

                  9672fe04ec1c4aa4c47ab6a27904a496

                  SHA1

                  aabb7c33b5d48b098a879ff923282b9632296597

                  SHA256

                  a6a83fedc7d85a8b0b95b00f525285d642152fc2a5493dddf87dd606ac0b8b01

                  SHA512

                  73dcfe86a568f7ec5ba877bdb64d490884a159a0dd7551b7f4cdc47dde20fc27ac9652d4205a15a6026f91372bf5b3cef1429ac3bf29a838e521ee3ed72b7a12

                • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nhih0ahd.h1f.ps1

                  Filesize

                  60B

                  MD5

                  d17fe0a3f47be24a6453e9ef58c94641

                  SHA1

                  6ab83620379fc69f80c0242105ddffd7d98d5d9d

                  SHA256

                  96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

                  SHA512

                  5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

                  Filesize

                  4KB

                  MD5

                  02fe15a59a3018b7e51ef0169125b443

                  SHA1

                  31b425cff08ffd21e9430d26561fbbfa884a63e4

                  SHA256

                  aa2115eee916dd6c1f25bcf9ff5741258f1353b1f3357828f699ed80b642ed0b

                  SHA512

                  727ea4a9f3115678cf73566dc2180582dd581e9536ce3cb50558392d5c20e6feaf4ce9f0301ff090ff8fc7882c3a26e3daa6aea84b107136dc4a579ba5740d4e

                • C:\Users\Admin\AppData\Local\Temp\tmp882B.tmp

                  Filesize

                  1KB

                  MD5

                  ccd64d33b66fdd70372db8c516916a03

                  SHA1

                  a9850b29c1e36efc4394c7054ce3537bcb25c118

                  SHA256

                  ea0dd899d1a56c83eaeb56aa15d6fa78897f853bf38c0eec1e5e6fcb7b076132

                  SHA512

                  4007d6d2b7fb37b4477afd2a2a3338ac979b8e7c2011853410a89feb356026653395af544852c2b5499c34b5af03d2162f269d9685391805083cc409253e6f11

                • memory/752-115-0x0000000000400000-0x0000000000478000-memory.dmp

                  Filesize

                  480KB

                • memory/752-118-0x0000000000400000-0x0000000000478000-memory.dmp

                  Filesize

                  480KB

                • memory/752-122-0x0000000000400000-0x0000000000478000-memory.dmp

                  Filesize

                  480KB

                • memory/752-131-0x0000000000400000-0x0000000000478000-memory.dmp

                  Filesize

                  480KB

                • memory/1208-86-0x0000000004DF0000-0x0000000004E00000-memory.dmp

                  Filesize

                  64KB

                • memory/1208-57-0x00000000060F0000-0x000000000610E000-memory.dmp

                  Filesize

                  120KB

                • memory/1208-61-0x00000000713E0000-0x000000007142C000-memory.dmp

                  Filesize

                  304KB

                • memory/1208-90-0x0000000007690000-0x0000000007726000-memory.dmp

                  Filesize

                  600KB

                • memory/1208-88-0x0000000007200000-0x000000000721A000-memory.dmp

                  Filesize

                  104KB

                • memory/1208-95-0x0000000007730000-0x0000000007738000-memory.dmp

                  Filesize

                  32KB

                • memory/1208-21-0x0000000005A60000-0x0000000005AC6000-memory.dmp

                  Filesize

                  408KB

                • memory/1208-24-0x0000000004DF0000-0x0000000004E00000-memory.dmp

                  Filesize

                  64KB

                • memory/1208-23-0x0000000005AD0000-0x0000000005B36000-memory.dmp

                  Filesize

                  408KB

                • memory/1208-91-0x0000000007610000-0x0000000007621000-memory.dmp

                  Filesize

                  68KB

                • memory/1208-58-0x0000000006180000-0x00000000061CC000-memory.dmp

                  Filesize

                  304KB

                • memory/1208-60-0x0000000007070000-0x00000000070A2000-memory.dmp

                  Filesize

                  200KB

                • memory/1208-25-0x0000000004DF0000-0x0000000004E00000-memory.dmp

                  Filesize

                  64KB

                • memory/1208-20-0x0000000074DF0000-0x00000000755A0000-memory.dmp

                  Filesize

                  7.7MB

                • memory/1208-102-0x0000000074DF0000-0x00000000755A0000-memory.dmp

                  Filesize

                  7.7MB

                • memory/1208-59-0x000000007FA50000-0x000000007FA60000-memory.dmp

                  Filesize

                  64KB

                • memory/1208-73-0x0000000006690000-0x00000000066AE000-memory.dmp

                  Filesize

                  120KB

                • memory/2580-8-0x000000000AC10000-0x000000000AC1A000-memory.dmp

                  Filesize

                  40KB

                • memory/2580-50-0x0000000074DF0000-0x00000000755A0000-memory.dmp

                  Filesize

                  7.7MB

                • memory/2580-10-0x000000000AD10000-0x000000000ADD6000-memory.dmp

                  Filesize

                  792KB

                • memory/2580-9-0x000000000AC20000-0x000000000AC2E000-memory.dmp

                  Filesize

                  56KB

                • memory/2580-0-0x0000000000E40000-0x0000000000F4A000-memory.dmp

                  Filesize

                  1.0MB

                • memory/2580-7-0x00000000082C0000-0x00000000082D4000-memory.dmp

                  Filesize

                  80KB

                • memory/2580-6-0x000000000A8D0000-0x000000000A96C000-memory.dmp

                  Filesize

                  624KB

                • memory/2580-5-0x0000000003320000-0x000000000332A000-memory.dmp

                  Filesize

                  40KB

                • memory/2580-4-0x0000000007FA0000-0x0000000007FB0000-memory.dmp

                  Filesize

                  64KB

                • memory/2580-3-0x0000000007E20000-0x0000000007EB2000-memory.dmp

                  Filesize

                  584KB

                • memory/2580-2-0x00000000082F0000-0x0000000008894000-memory.dmp

                  Filesize

                  5.6MB

                • memory/2580-1-0x0000000074DF0000-0x00000000755A0000-memory.dmp

                  Filesize

                  7.7MB

                • memory/3632-87-0x00000000077B0000-0x0000000007E2A000-memory.dmp

                  Filesize

                  6.5MB

                • memory/3632-89-0x00000000071E0000-0x00000000071EA000-memory.dmp

                  Filesize

                  40KB

                • memory/3632-63-0x000000007F190000-0x000000007F1A0000-memory.dmp

                  Filesize

                  64KB

                • memory/3632-84-0x0000000006DF0000-0x0000000006E93000-memory.dmp

                  Filesize

                  652KB

                • memory/3632-83-0x0000000000C30000-0x0000000000C40000-memory.dmp

                  Filesize

                  64KB

                • memory/3632-85-0x0000000000C30000-0x0000000000C40000-memory.dmp

                  Filesize

                  64KB

                • memory/3632-15-0x0000000004890000-0x00000000048C6000-memory.dmp

                  Filesize

                  216KB

                • memory/3632-17-0x0000000004F00000-0x0000000005528000-memory.dmp

                  Filesize

                  6.2MB

                • memory/3632-16-0x0000000074DF0000-0x00000000755A0000-memory.dmp

                  Filesize

                  7.7MB

                • memory/3632-19-0x0000000004E70000-0x0000000004E92000-memory.dmp

                  Filesize

                  136KB

                • memory/3632-18-0x0000000000C30000-0x0000000000C40000-memory.dmp

                  Filesize

                  64KB

                • memory/3632-62-0x00000000713E0000-0x000000007142C000-memory.dmp

                  Filesize

                  304KB

                • memory/3632-92-0x00000000073A0000-0x00000000073AE000-memory.dmp

                  Filesize

                  56KB

                • memory/3632-93-0x00000000073B0000-0x00000000073C4000-memory.dmp

                  Filesize

                  80KB

                • memory/3632-94-0x00000000074B0000-0x00000000074CA000-memory.dmp

                  Filesize

                  104KB

                • memory/3632-45-0x0000000005870000-0x0000000005BC4000-memory.dmp

                  Filesize

                  3.3MB

                • memory/3632-26-0x0000000000C30000-0x0000000000C40000-memory.dmp

                  Filesize

                  64KB

                • memory/3632-101-0x0000000074DF0000-0x00000000755A0000-memory.dmp

                  Filesize

                  7.7MB

                • memory/3688-123-0x0000000000400000-0x0000000000424000-memory.dmp

                  Filesize

                  144KB

                • memory/3688-124-0x0000000000400000-0x0000000000424000-memory.dmp

                  Filesize

                  144KB

                • memory/3688-119-0x0000000000400000-0x0000000000424000-memory.dmp

                  Filesize

                  144KB

                • memory/3688-129-0x0000000000400000-0x0000000000424000-memory.dmp

                  Filesize

                  144KB

                • memory/3688-125-0x0000000000400000-0x0000000000424000-memory.dmp

                  Filesize

                  144KB

                • memory/4376-114-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-135-0x0000000010000000-0x0000000010019000-memory.dmp

                  Filesize

                  100KB

                • memory/4376-108-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-110-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-111-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-113-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-107-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-112-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-105-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-174-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-103-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-104-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-46-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-47-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-49-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-51-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-52-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-55-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-54-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-173-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-139-0x0000000010000000-0x0000000010019000-memory.dmp

                  Filesize

                  100KB

                • memory/4376-138-0x0000000010000000-0x0000000010019000-memory.dmp

                  Filesize

                  100KB

                • memory/4376-142-0x0000000010000000-0x0000000010019000-memory.dmp

                  Filesize

                  100KB

                • memory/4376-140-0x0000000010000000-0x0000000010019000-memory.dmp

                  Filesize

                  100KB

                • memory/4376-141-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-106-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-144-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-56-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-149-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-150-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-157-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-158-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-165-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/4376-166-0x0000000000400000-0x0000000000482000-memory.dmp

                  Filesize

                  520KB

                • memory/5020-116-0x0000000000400000-0x0000000000457000-memory.dmp

                  Filesize

                  348KB