Analysis

  • max time kernel
    158s
  • max time network
    170s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    11/02/2022, 23:36

General

  • Target

    e0949a201bce683fd955b895d6a80f2021fe83d5c7ba44ab0f0d16086683ced1.exe

  • Size

    3.6MB

  • MD5

    405596da338a003671a2cce91b018dd3

  • SHA1

    a44249e76d2b4eebc93e3d7f15c50b0fdad49fb1

  • SHA256

    e0949a201bce683fd955b895d6a80f2021fe83d5c7ba44ab0f0d16086683ced1

  • SHA512

    24fe1ff764fa9483cc6fa4595b397dd95cb549920713ee0a91a980bd58c40282a103518c950691650921bcfaff29ab17213524f16f871f4c45ee96cff6e2e687

Malware Config

Extracted

Family

cryptbot

C2

sezwex34.top

morswd03.top

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

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

  • Drops file in Program Files directory 6 IoCs
  • Drops file in Windows directory 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e0949a201bce683fd955b895d6a80f2021fe83d5c7ba44ab0f0d16086683ced1.exe
    "C:\Users\Admin\AppData\Local\Temp\e0949a201bce683fd955b895d6a80f2021fe83d5c7ba44ab0f0d16086683ced1.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:1880
    • C:\Program Files (x86)\repent1\Setup.exe
      "C:\Program Files (x86)\repent1\Setup.exe"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      PID:1256
    • C:\Program Files (x86)\repent1\KMSpico.exe
      "C:\Program Files (x86)\repent1\KMSpico.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4376
      • C:\Users\Admin\AppData\Local\Temp\is-5L8S7.tmp\KMSpico.tmp
        "C:\Users\Admin\AppData\Local\Temp\is-5L8S7.tmp\KMSpico.tmp" /SL5="$6002C,2952592,69120,C:\Program Files (x86)\repent1\KMSpico.exe"
        3⤵
        • Executes dropped EXE
        PID:2700
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    PID:2364
  • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
    C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    PID:4940

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/1256-141-0x0000000000400000-0x0000000000564000-memory.dmp

          Filesize

          1.4MB

        • memory/1256-144-0x00000000004C6000-0x00000000004C8000-memory.dmp

          Filesize

          8KB

        • memory/1256-145-0x0000000000640000-0x0000000000641000-memory.dmp

          Filesize

          4KB

        • memory/1256-146-0x0000000000760000-0x00000000007A8000-memory.dmp

          Filesize

          288KB

        • memory/2364-139-0x00000232DD920000-0x00000232DD930000-memory.dmp

          Filesize

          64KB

        • memory/2364-140-0x00000232DFFE0000-0x00000232DFFE4000-memory.dmp

          Filesize

          16KB

        • memory/2364-138-0x00000232DD360000-0x00000232DD370000-memory.dmp

          Filesize

          64KB

        • memory/2700-143-0x0000000000750000-0x0000000000751000-memory.dmp

          Filesize

          4KB

        • memory/4376-134-0x0000000000400000-0x0000000000417000-memory.dmp

          Filesize

          92KB

        • memory/4376-142-0x0000000000401000-0x000000000040B000-memory.dmp

          Filesize

          40KB