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Analysis

  • max time kernel
    140s
  • max time network
    28s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    17/03/2023, 12:21

General

  • Target

    9c27c3c506f2c018c73d1ad20623e5d2.exe

  • Size

    791KB

  • MD5

    9c27c3c506f2c018c73d1ad20623e5d2

  • SHA1

    236c8990a2133fe0a3ca2fa0498999a85893a7b5

  • SHA256

    40d1db94dc15e8042332d08a56ab9694cd27d86a124941fffd12ec4ee8dfe527

  • SHA512

    911984acfe90d4d4842e84a22c50b20bb35d6caa66bd7485faa727b678cb520a11bba70585a47263cc88a95ecff115135cabf91b649e03dc4610bc818628b3e0

  • SSDEEP

    24576:qLsifA9O1vvbWxmS1oiSFLKAypX/Q+UcH:qLsifu0W0iSFL3AQ7k

Malware Config

Extracted

Family

cryptbot

C2

http://ernwld52.top/gate.php

Signatures

  • CryptBot

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

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Themida packer 20 IoCs

    Detects Themida, an advanced Windows software protection system.

  • 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.

  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 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 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9c27c3c506f2c018c73d1ad20623e5d2.exe
    "C:\Users\Admin\AppData\Local\Temp\9c27c3c506f2c018c73d1ad20623e5d2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1604
    • C:\Users\Admin\AppData\Local\Temp\9c27c3c506f2c018c73d1ad20623e5d2.exe
      "C:\Users\Admin\AppData\Local\Temp\9c27c3c506f2c018c73d1ad20623e5d2.exe"
      2⤵
      • Maps connected drives based on registry
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1952
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c C:\Users\Admin\AppData\Roaming\C7623F2CCCDD67C6\prebid.exe
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1036
        • C:\Users\Admin\AppData\Roaming\C7623F2CCCDD67C6\prebid.exe
          C:\Users\Admin\AppData\Roaming\C7623F2CCCDD67C6\prebid.exe
          4⤵
          • Identifies VirtualBox via ACPI registry values (likely anti-VM)
          • Checks BIOS information in registry
          • Executes dropped EXE
          • Loads dropped DLL
          • Checks whether UAC is enabled
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1152
          • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe
            "C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe"
            5⤵
            • Identifies VirtualBox via ACPI registry values (likely anti-VM)
            • Checks BIOS information in registry
            • Executes dropped EXE
            • Checks whether UAC is enabled
            • Suspicious use of NtSetInformationThreadHideFromDebugger
            • Suspicious behavior: AddClipboardFormatListener
            • Suspicious behavior: EnumeratesProcesses
            PID:1500
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout -t 5 && del "C:\Users\Admin\AppData\Local\Temp\9c27c3c506f2c018c73d1ad20623e5d2.exe"
        3⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:1244
        • C:\Windows\SysWOW64\timeout.exe
          timeout -t 5
          4⤵
          • Delays execution with timeout.exe
          PID:1596

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\1665.tmp

    Filesize

    32B

    MD5

    48255136fc205998b4ebbe6f72b5cdd0

    SHA1

    c6f2c7fdd75a999a61ddfb5b4923d6a0dad917b1

    SHA256

    00523df8a35803806212867d9f6ab89d17a1bfdd3aef5fbb1dc10fcd6faa114c

    SHA512

    c74a7e214f93d124aed393e00f720ac91ca46328f4edf710b26235145b676003261943e4779acbc52ef14667a78636968c04c1065ac5cc70ba9f54d6ab0226de

  • C:\Users\Admin\AppData\Local\Temp\1714.tmp

    Filesize

    71KB

    MD5

    6082dd13ad8102d17f9db9cd07600e97

    SHA1

    39becc88cea914d843b3c5521038907f2f2f4e71

    SHA256

    40a3f938c8c1eb929771c444d5f8887c42c7cde6281690e2071a2593ba92e48a

    SHA512

    b7d5c716b6339b3138492c8b0cf4c9540a8d8224f9d5e72e34ceab442bdfa9c855473bbed68a489851f019461e1b1f9d86baf067be556c67b948c930899d3c1e

  • C:\Users\Admin\AppData\Roaming\C7623F2CCCDD67C6\prebid.exe

    Filesize

    2.8MB

    MD5

    a2ee23e1c6ca048c635bde8d197631a8

    SHA1

    9983cbd777a090b4ef2518fd40862f1925a419e9

    SHA256

    dba21175cccfd95b053c628b5162f3bf2af5fc9b0aaa0d2b384a6636a1921a67

    SHA512

    d42909e0aeb14bff6cd25867d927fdcb0d1fa88228a0d5059fa5ebca9db0cba6bc4f49f7ef99b33f2378cc5f007fbf91ba8853f5758540e918486559ed4d9ce6

  • C:\Users\Admin\AppData\Roaming\C7623F2CCCDD67C6\prebid.exe

    Filesize

    2.8MB

    MD5

    a2ee23e1c6ca048c635bde8d197631a8

    SHA1

    9983cbd777a090b4ef2518fd40862f1925a419e9

    SHA256

    dba21175cccfd95b053c628b5162f3bf2af5fc9b0aaa0d2b384a6636a1921a67

    SHA512

    d42909e0aeb14bff6cd25867d927fdcb0d1fa88228a0d5059fa5ebca9db0cba6bc4f49f7ef99b33f2378cc5f007fbf91ba8853f5758540e918486559ed4d9ce6

  • C:\Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe

    Filesize

    2.8MB

    MD5

    a2ee23e1c6ca048c635bde8d197631a8

    SHA1

    9983cbd777a090b4ef2518fd40862f1925a419e9

    SHA256

    dba21175cccfd95b053c628b5162f3bf2af5fc9b0aaa0d2b384a6636a1921a67

    SHA512

    d42909e0aeb14bff6cd25867d927fdcb0d1fa88228a0d5059fa5ebca9db0cba6bc4f49f7ef99b33f2378cc5f007fbf91ba8853f5758540e918486559ed4d9ce6

  • \Users\Admin\AppData\Roaming\C7623F2CCCDD67C6\prebid.exe

    Filesize

    2.8MB

    MD5

    a2ee23e1c6ca048c635bde8d197631a8

    SHA1

    9983cbd777a090b4ef2518fd40862f1925a419e9

    SHA256

    dba21175cccfd95b053c628b5162f3bf2af5fc9b0aaa0d2b384a6636a1921a67

    SHA512

    d42909e0aeb14bff6cd25867d927fdcb0d1fa88228a0d5059fa5ebca9db0cba6bc4f49f7ef99b33f2378cc5f007fbf91ba8853f5758540e918486559ed4d9ce6

  • \Users\Admin\AppData\Roaming\NCH Software\DrawPad\DpEditor.exe

    Filesize

    2.8MB

    MD5

    a2ee23e1c6ca048c635bde8d197631a8

    SHA1

    9983cbd777a090b4ef2518fd40862f1925a419e9

    SHA256

    dba21175cccfd95b053c628b5162f3bf2af5fc9b0aaa0d2b384a6636a1921a67

    SHA512

    d42909e0aeb14bff6cd25867d927fdcb0d1fa88228a0d5059fa5ebca9db0cba6bc4f49f7ef99b33f2378cc5f007fbf91ba8853f5758540e918486559ed4d9ce6

  • memory/1036-149-0x0000000001FF0000-0x000000000272C000-memory.dmp

    Filesize

    7.2MB

  • memory/1152-145-0x0000000000A00000-0x000000000113C000-memory.dmp

    Filesize

    7.2MB

  • memory/1152-156-0x0000000000A00000-0x000000000113C000-memory.dmp

    Filesize

    7.2MB

  • memory/1152-151-0x0000000000A00000-0x000000000113C000-memory.dmp

    Filesize

    7.2MB

  • memory/1152-150-0x0000000000A00000-0x000000000113C000-memory.dmp

    Filesize

    7.2MB

  • memory/1152-148-0x0000000000A00000-0x000000000113C000-memory.dmp

    Filesize

    7.2MB

  • memory/1152-147-0x0000000000A00000-0x000000000113C000-memory.dmp

    Filesize

    7.2MB

  • memory/1152-146-0x0000000000A00000-0x000000000113C000-memory.dmp

    Filesize

    7.2MB

  • memory/1500-159-0x0000000000230000-0x000000000096C000-memory.dmp

    Filesize

    7.2MB

  • memory/1500-158-0x0000000000230000-0x000000000096C000-memory.dmp

    Filesize

    7.2MB

  • memory/1500-165-0x0000000000230000-0x000000000096C000-memory.dmp

    Filesize

    7.2MB

  • memory/1500-164-0x0000000000230000-0x000000000096C000-memory.dmp

    Filesize

    7.2MB

  • memory/1500-163-0x0000000000230000-0x000000000096C000-memory.dmp

    Filesize

    7.2MB

  • memory/1500-162-0x0000000000230000-0x000000000096C000-memory.dmp

    Filesize

    7.2MB

  • memory/1500-161-0x0000000000230000-0x000000000096C000-memory.dmp

    Filesize

    7.2MB

  • memory/1500-160-0x0000000000230000-0x000000000096C000-memory.dmp

    Filesize

    7.2MB

  • memory/1952-54-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-56-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-62-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-55-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-64-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1952-65-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-60-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-59-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-140-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-58-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB

  • memory/1952-57-0x0000000000400000-0x00000000004CB000-memory.dmp

    Filesize

    812KB