Analysis

  • max time kernel
    118s
  • max time network
    134s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    16/03/2024, 10:33

General

  • Target

    cdd521dc8307aaa2036dfe46cd13eefa.exe

  • Size

    253KB

  • MD5

    cdd521dc8307aaa2036dfe46cd13eefa

  • SHA1

    150e2aa9b53b1833c93aa2567afd527877758d0c

  • SHA256

    1132d9ccc698bd1fb423d57d3d4969779c9ee9dfde0258d1834a8ad21f6f63f6

  • SHA512

    6a5aaf759a857265408514478b2faa68d65a557449f7341edc463a5cfd9f0835e46cdeb5bb4e2fdfa3f2a79ef78337790cf2d02b0cb2d445501edbbfec20f62c

  • SSDEEP

    3072:hsdDxbCSsGIiDVbDJ7tNnCDDRvLGmrOAOkGt6+duWA/t/SHUebbxCbGgKk12qk/g:UxbCoR5b9stvLGtELbMUTKZ

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.gmail.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    yyqchjdlmihcruoy

Signatures

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: CmdExeWriteProcessMemorySpam 2 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cdd521dc8307aaa2036dfe46cd13eefa.exe
    "C:\Users\Admin\AppData\Local\Temp\cdd521dc8307aaa2036dfe46cd13eefa.exe"
    1⤵
    • Suspicious behavior: RenamesItself
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2364
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" cmd /c bfsvc.exe "true" "true" "true" "true"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3040
      • C:\Users\Admin\AppData\Local\Temp\bfsvc.exe
        bfsvc.exe "true" "true" "true" "true"
        3⤵
        • Executes dropped EXE
        • Modifies system certificate store
        • Suspicious behavior: CmdExeWriteProcessMemorySpam
        • Suspicious use of AdjustPrivilegeToken
        PID:2856
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cdd521dc8307aaa2036dfe46cd13eefa.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cdd521dc8307aaa2036dfe46cd13eefa.exe" C:\Users\Admin\AppData\Local\Temp\cdd521dc8307aaa2036dfe46cd13eefa.exe
      2⤵
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2812
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" cmd /c bfsvc.exe "true" "true" "true" "true"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2780
        • C:\Users\Admin\AppData\Local\Temp\bfsvc.exe
          bfsvc.exe "true" "true" "true" "true"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: CmdExeWriteProcessMemorySpam
          • Suspicious use of AdjustPrivilegeToken
          PID:2752

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    67KB

    MD5

    753df6889fd7410a2e9fe333da83a429

    SHA1

    3c425f16e8267186061dd48ac1c77c122962456e

    SHA256

    b42dc237e44cbc9a43400e7d3f9cbd406dbdefd62bfe87328f8663897d69df78

    SHA512

    9d56f79410ad0cf852c74c3ef9454e7ae86e80bdd6ff67773994b48ccac71142bcf5c90635da6a056e1406e81e64674db9584928e867c55b77b59e2851cf6444

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    00420935d592886c40848971b035335d

    SHA1

    291f1453903de2de6dc8a91ebfaef96ec8b099ed

    SHA256

    b257a91d1a3d6c4c66fb2cb124f1aa125df77826fbb24ea04c8e6c59c0ec6245

    SHA512

    4b3d8919ce2fbc7a5c17adf96c536d419dbdd99d5d6fc4ada2c012bc2f92d02a912e449dbc71152b4ceae680350a540757a3f6657fafdd0ca3d8e8fa99860561

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    95e74622a2ceb3e576baafc74daf42a4

    SHA1

    b79e376a9ee06364f4a400497e2fa924003f887f

    SHA256

    aa928b50b61e2cdfa31f5e704d000616df876fd8d6d9db4ee6eba6dd5069d269

    SHA512

    567aadfd434750ea096f98e8304652a0583994c0a804e85c6c29909e7f4fb10406ad5802db3e82f8b3536a569c0ad77ff57400d1277e138f0e62fd0b077a1227

  • C:\Users\Admin\AppData\Local\Temp\Cab2E05.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar2F82.tmp

    Filesize

    175KB

    MD5

    dd73cead4b93366cf3465c8cd32e2796

    SHA1

    74546226dfe9ceb8184651e920d1dbfb432b314e

    SHA256

    a6752b7851b591550e4625b832a393aabcc428de18d83e8593cd540f7d7cae22

    SHA512

    ce1bdd595065c94fa528badf4a6a8777893807d6789267612755df818ba6ffe55e4df429710aea29526ee4aa8ef20e25f2f05341da53992157d21ae032c0fb63

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

    Filesize

    7KB

    MD5

    7bfcf811a47c0ca77ee2c95333f0476e

    SHA1

    f3580c33ae27018d627ea12ffc41fb925367524f

    SHA256

    f740df4d3a6c0b378116b48c1ed18a36e82938cf7dcaaba58f0ba8101f3e3531

    SHA512

    4386eb26bad23945ac7fe71a226a8f6a5a261f7e704e2389b360ad6f0864460137fbf95bc51abb3e90beb8328d4e854d7b5b0f04383a5460cc6dea5f28529c3b

  • memory/2364-77-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

    Filesize

    9.9MB

  • memory/2364-2-0x000000001B090000-0x000000001B110000-memory.dmp

    Filesize

    512KB

  • memory/2364-1-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

    Filesize

    9.9MB

  • memory/2364-78-0x000000001B090000-0x000000001B110000-memory.dmp

    Filesize

    512KB

  • memory/2364-79-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

    Filesize

    9.9MB

  • memory/2364-0-0x0000000000FA0000-0x0000000000FE4000-memory.dmp

    Filesize

    272KB

  • memory/2752-88-0x0000000000440000-0x0000000000480000-memory.dmp

    Filesize

    256KB

  • memory/2752-108-0x00000000744F0000-0x0000000074BDE000-memory.dmp

    Filesize

    6.9MB

  • memory/2752-86-0x0000000000150000-0x0000000000158000-memory.dmp

    Filesize

    32KB

  • memory/2752-87-0x00000000744F0000-0x0000000074BDE000-memory.dmp

    Filesize

    6.9MB

  • memory/2812-80-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

    Filesize

    9.9MB

  • memory/2812-81-0x000000001B130000-0x000000001B1B0000-memory.dmp

    Filesize

    512KB

  • memory/2812-107-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

    Filesize

    9.9MB

  • memory/2856-76-0x00000000744D0000-0x0000000074BBE000-memory.dmp

    Filesize

    6.9MB

  • memory/2856-9-0x0000000004AD0000-0x0000000004B10000-memory.dmp

    Filesize

    256KB

  • memory/2856-8-0x00000000744D0000-0x0000000074BBE000-memory.dmp

    Filesize

    6.9MB

  • memory/2856-7-0x0000000000C90000-0x0000000000C98000-memory.dmp

    Filesize

    32KB