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Analysis

  • max time kernel
    125s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    26/04/2024, 07:06

General

  • Target

    Celesty.exe

  • Size

    1.7MB

  • MD5

    8966d25141f5e150ff7d02ac502cce46

  • SHA1

    f882485d1ffac1b75b60794824b771e4ce33d7b7

  • SHA256

    8694257c04deed3937833145954c65564627f7d40cd20f8401696933a03b7e3f

  • SHA512

    caedef6e8fdc042d6586816bdc87c36b3d40c22a8e4e331d46296b669ed03f2e295f4b44ed4092f43e8d0dad8cc40766982d6938d1d638fb4e4eecaddd529df3

  • SSDEEP

    49152:6PxCjaDpascfyHTtgWc79pGvFog9hlQ0xM7QYeYnUgy:mCq4sokTtlPFooQzzU/

Malware Config

Extracted

Family

mercurialgrabber

C2

https://discord.com/api/webhooks/935223250571640882/ViB43kUXE9CCFxm2v1jxJfLyHYVNk3Y3-laU94OpWmJjw7id0TwbDJUP1by4-O7zvfZu

Signatures

  • Mercurial Grabber Stealer

    Mercurial Grabber is an open source stealer targeting Chrome, Discord and some game clients as well as generic system information.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 1 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Looks up external IP address via web service 3 IoCs

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 1 IoCs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Modifies registry class 57 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 44 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 10 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Celesty.exe
    "C:\Users\Admin\AppData\Local\Temp\Celesty.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2172
    • C:\Users\Admin\AppData\Roaming\dump\CelestyBuilder.exe
      "C:\Users\Admin\AppData\Roaming\dump\CelestyBuilder.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2500
      • C:\Users\Admin\AppData\Local\Temp\CELESTY BUILDER.EXE
        "C:\Users\Admin\AppData\Local\Temp\CELESTY BUILDER.EXE"
        3⤵
        • Looks for VirtualBox Guest Additions in registry
        • Looks for VMWare Tools registry key
        • Checks BIOS information in registry
        • Executes dropped EXE
        • Maps connected drives based on registry
        • Checks SCSI registry key(s)
        • Checks processor information in registry
        • Enumerates system info in registry
        • Modifies system certificate store
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2628
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 2628 -s 1748
          4⤵
            PID:2740
        • C:\Users\Admin\AppData\Local\Temp\CELESTY.EXE
          "C:\Users\Admin\AppData\Local\Temp\CELESTY.EXE"
          3⤵
          • Executes dropped EXE
          • Modifies registry class
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          • Suspicious use of SetWindowsHookEx
          PID:2416
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2488

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\CELESTY BUILDER.EXE

      Filesize

      41KB

      MD5

      4cc81e53b9037673b9014431e9be0e60

      SHA1

      62c57cbad6be321e65bea71bd87801fcb0bf7af9

      SHA256

      1baf3f560a47aacd9a841939ff127fbade26095dd47867dfec38bc2f1fa4a9ad

      SHA512

      dae96f885d20fe185302f689f844032797209b28d1295444a29fa730d01b520e7994121fe8bd2b55c0d21b395da372a9846d9dec5960edfecd40ac41690d36ff

    • C:\Users\Admin\Downloads\RCXF6FD.tmp

      Filesize

      53KB

      MD5

      098062dde5741b0b42e73060a1b95db0

      SHA1

      803e9fd3f740cfebb06333a7e056e6b6dbdc10d1

      SHA256

      63e2cb9d0bfc79659e24fb3b119b249691dc79c5da7c42f7e79a9dcdd8ccd611

      SHA512

      69a18ec7f7fc8e49c2ef9f0ffc62020bd603f6874ecf6cc2c16351aaddad4a3ef37a7575c6f44065aa1cf606d2ad85275a003105cbe4527d9a9b035d6bfd678a

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

      Filesize

      2.7MB

      MD5

      c3009ee63bc661d9ea75eaeb256448ca

      SHA1

      45eb01150756df432e25eed44d976442473356de

      SHA256

      0bb88564a22bfd6d9ad6e4d8efa9077792a7b6094c2a0f865d70c43e11507352

      SHA512

      96f5847fbeef95df1309e97a4bc3d786a5f5c19b87e804f12d88b4473a0b50291c40407a3d95a2d5d78031f03be76da47f1846a73c7802ddae46a38ac4634e67

    • \Users\Admin\AppData\Roaming\dump\CelestyBuilder.exe

      Filesize

      2.8MB

      MD5

      d604d3ac515faf6ad32e8e57c170d389

      SHA1

      02069909d405b33af28da67ad232013307a198b2

      SHA256

      5d3955502a6b63e394eea67aad6c83dfa80d08484d9f11956e77ec5b47c6f8b8

      SHA512

      bb1d77a7430204eef2ecb3cdfb7d2b2b5f80f9f5fefee6cbff2fc69538523177e8010d9dc4b353f4adc4c6bdba2c398ceac90ce43a1302b2cdf5149dd7680817

    • memory/2172-1-0x0000000074610000-0x0000000074BBB000-memory.dmp

      Filesize

      5.7MB

    • memory/2172-2-0x0000000000200000-0x0000000000240000-memory.dmp

      Filesize

      256KB

    • memory/2172-13-0x0000000074610000-0x0000000074BBB000-memory.dmp

      Filesize

      5.7MB

    • memory/2172-0-0x0000000074610000-0x0000000074BBB000-memory.dmp

      Filesize

      5.7MB

    • memory/2416-67-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-35-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-68-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-29-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-63-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-31-0x0000000000230000-0x0000000000231000-memory.dmp

      Filesize

      4KB

    • memory/2416-32-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-33-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

      Filesize

      4KB

    • memory/2416-34-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-69-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-36-0x0000000003FE0000-0x0000000003FE2000-memory.dmp

      Filesize

      8KB

    • memory/2416-37-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

      Filesize

      4KB

    • memory/2416-70-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-54-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-58-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-59-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2416-25-0x0000000000230000-0x0000000000231000-memory.dmp

      Filesize

      4KB

    • memory/2416-64-0x0000000000400000-0x00000000006DC000-memory.dmp

      Filesize

      2.9MB

    • memory/2488-61-0x0000000140000000-0x00000001405E8000-memory.dmp

      Filesize

      5.9MB

    • memory/2488-62-0x0000000140000000-0x00000001405E8000-memory.dmp

      Filesize

      5.9MB

    • memory/2488-65-0x0000000140000000-0x00000001405E8000-memory.dmp

      Filesize

      5.9MB

    • memory/2488-66-0x0000000140000000-0x00000001405E8000-memory.dmp

      Filesize

      5.9MB

    • memory/2628-30-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

      Filesize

      9.9MB

    • memory/2628-28-0x000000001ABB0000-0x000000001AC30000-memory.dmp

      Filesize

      512KB

    • memory/2628-27-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

      Filesize

      9.9MB

    • memory/2628-26-0x0000000000D10000-0x0000000000D20000-memory.dmp

      Filesize

      64KB