Analysis

  • max time kernel
    150s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    13-03-2023 10:56

General

  • Target

    3654fad9d471a913d6a4e4669c4cf6d0d93c35218d35793db325079a9f2bcb31.exe

  • Size

    795KB

  • MD5

    81c1a4c3135df84530588d812b9c860b

  • SHA1

    d98e1eade1b6d333716cf47015e22208e04d4cd3

  • SHA256

    3654fad9d471a913d6a4e4669c4cf6d0d93c35218d35793db325079a9f2bcb31

  • SHA512

    92958f6899b357bf5014e7a547ef9e50af76607bd8bd9d737eb94c20283bff91a60cbbea8869820ebab816770f3762caa843235757e5d724f69978b005b070a1

  • SSDEEP

    24576:AjULrWjEXNmzNqyRYpU/sdMgQf/HhmYs4ykvWiH:AqrFXNmz8yKpUCRmBs4y8Z

Malware Config

Extracted

Family

cryptbot

C2

http://lahxam72.top/gate.php

Attributes
  • payload_url

    http://ahowyg10.top/phylum.dat

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 19 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\3654fad9d471a913d6a4e4669c4cf6d0d93c35218d35793db325079a9f2bcb31.exe
    "C:\Users\Admin\AppData\Local\Temp\3654fad9d471a913d6a4e4669c4cf6d0d93c35218d35793db325079a9f2bcb31.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:836
    • C:\Users\Admin\AppData\Local\Temp\3654fad9d471a913d6a4e4669c4cf6d0d93c35218d35793db325079a9f2bcb31.exe
      "C:\Users\Admin\AppData\Local\Temp\3654fad9d471a913d6a4e4669c4cf6d0d93c35218d35793db325079a9f2bcb31.exe"
      2⤵
      • Maps connected drives based on registry
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1176
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c C:\Users\Admin\AppData\Roaming\BA7596EB0CD0909A\phylum.exe
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1064
        • C:\Users\Admin\AppData\Roaming\BA7596EB0CD0909A\phylum.exe
          C:\Users\Admin\AppData\Roaming\BA7596EB0CD0909A\phylum.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:1776
          • 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:1772
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout -t 5 && del "C:\Users\Admin\AppData\Local\Temp\3654fad9d471a913d6a4e4669c4cf6d0d93c35218d35793db325079a9f2bcb31.exe"
        3⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:676
        • C:\Windows\SysWOW64\timeout.exe
          timeout -t 5
          4⤵
          • Delays execution with timeout.exe
          PID:976

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

5
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

2
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\1491.tmp
    Filesize

    32B

    MD5

    be980f09a839e6ed95c511824ed5ca31

    SHA1

    4fa4d1f170a173f494e6032b1e423fc5be608416

    SHA256

    7bf0cb21745162f09e70776ac472fbd1e6a99a842d1d686f73a89be8d95a6928

    SHA512

    d2dd7d923e857fcc28c7ddfddc59b0a750d6f26bc194d5776a6e56d540c508bb878e701e4ce2fd6c9bb709866232b76c5254f13582d5a652aac5663b780c96f2

  • C:\Users\Admin\AppData\Local\Temp\1550.tmp
    Filesize

    71KB

    MD5

    e5e81f0ae5ba9a2ac3db0a17d3c9f810

    SHA1

    c2d6bdf002325094ff399b1e4c36df575b48ee4f

    SHA256

    a9826445bacefee0847379551b63949c11cd58e505129c12743da87be48254f3

    SHA512

    cb77e1b933cc5c8a2ff8e0e8281f1d6d45b9d3bacbd0adef33515445fb00030cdb2cefc0b7fa22d2b2085b1751ee603027f82656c8b1c289cc71a2bdea630cce

  • C:\Users\Admin\AppData\Roaming\BA7596EB0CD0909A\phylum.exe
    Filesize

    2.9MB

    MD5

    0797bb0f2105bbeb1cc981bbec7227be

    SHA1

    0f7f15029af5eadb623a3f40c45e6cb90ded075c

    SHA256

    41963df127da7a39def9cfed213cbbbeb22cb1a93ff137dba394c6ad4d19fad3

    SHA512

    88c85e8772d1a13380c9b7b7c3d16499fd003d8293c79428e9f0cb2d7a97e9a78a90979a67782415caadeb3888d414a39111a90a18a298b37047e86b5dcb24cf

  • C:\Users\Admin\AppData\Roaming\BA7596EB0CD0909A\phylum.exe
    Filesize

    2.9MB

    MD5

    0797bb0f2105bbeb1cc981bbec7227be

    SHA1

    0f7f15029af5eadb623a3f40c45e6cb90ded075c

    SHA256

    41963df127da7a39def9cfed213cbbbeb22cb1a93ff137dba394c6ad4d19fad3

    SHA512

    88c85e8772d1a13380c9b7b7c3d16499fd003d8293c79428e9f0cb2d7a97e9a78a90979a67782415caadeb3888d414a39111a90a18a298b37047e86b5dcb24cf

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

    2.9MB

    MD5

    0797bb0f2105bbeb1cc981bbec7227be

    SHA1

    0f7f15029af5eadb623a3f40c45e6cb90ded075c

    SHA256

    41963df127da7a39def9cfed213cbbbeb22cb1a93ff137dba394c6ad4d19fad3

    SHA512

    88c85e8772d1a13380c9b7b7c3d16499fd003d8293c79428e9f0cb2d7a97e9a78a90979a67782415caadeb3888d414a39111a90a18a298b37047e86b5dcb24cf

  • \Users\Admin\AppData\Roaming\BA7596EB0CD0909A\phylum.exe
    Filesize

    2.9MB

    MD5

    0797bb0f2105bbeb1cc981bbec7227be

    SHA1

    0f7f15029af5eadb623a3f40c45e6cb90ded075c

    SHA256

    41963df127da7a39def9cfed213cbbbeb22cb1a93ff137dba394c6ad4d19fad3

    SHA512

    88c85e8772d1a13380c9b7b7c3d16499fd003d8293c79428e9f0cb2d7a97e9a78a90979a67782415caadeb3888d414a39111a90a18a298b37047e86b5dcb24cf

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

    2.9MB

    MD5

    0797bb0f2105bbeb1cc981bbec7227be

    SHA1

    0f7f15029af5eadb623a3f40c45e6cb90ded075c

    SHA256

    41963df127da7a39def9cfed213cbbbeb22cb1a93ff137dba394c6ad4d19fad3

    SHA512

    88c85e8772d1a13380c9b7b7c3d16499fd003d8293c79428e9f0cb2d7a97e9a78a90979a67782415caadeb3888d414a39111a90a18a298b37047e86b5dcb24cf

  • memory/1064-142-0x0000000001FC0000-0x0000000002711000-memory.dmp
    Filesize

    7.3MB

  • memory/1176-64-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-56-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-62-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-97-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/1176-137-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-60-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-59-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-58-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-54-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-57-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1176-55-0x0000000000400000-0x00000000004CC000-memory.dmp
    Filesize

    816KB

  • memory/1772-155-0x0000000000F60000-0x00000000016B1000-memory.dmp
    Filesize

    7.3MB

  • memory/1772-156-0x0000000000F60000-0x00000000016B1000-memory.dmp
    Filesize

    7.3MB

  • memory/1772-163-0x0000000000F60000-0x00000000016B1000-memory.dmp
    Filesize

    7.3MB

  • memory/1772-162-0x0000000000F60000-0x00000000016B1000-memory.dmp
    Filesize

    7.3MB

  • memory/1772-160-0x0000000000F60000-0x00000000016B1000-memory.dmp
    Filesize

    7.3MB

  • memory/1772-159-0x0000000000F60000-0x00000000016B1000-memory.dmp
    Filesize

    7.3MB

  • memory/1772-158-0x0000000000F60000-0x00000000016B1000-memory.dmp
    Filesize

    7.3MB

  • memory/1772-157-0x0000000000F60000-0x00000000016B1000-memory.dmp
    Filesize

    7.3MB

  • memory/1776-152-0x00000000003D0000-0x0000000000B21000-memory.dmp
    Filesize

    7.3MB

  • memory/1776-143-0x00000000003D0000-0x0000000000B21000-memory.dmp
    Filesize

    7.3MB

  • memory/1776-154-0x0000000002B10000-0x0000000003261000-memory.dmp
    Filesize

    7.3MB

  • memory/1776-144-0x00000000003D0000-0x0000000000B21000-memory.dmp
    Filesize

    7.3MB

  • memory/1776-146-0x00000000003D0000-0x0000000000B21000-memory.dmp
    Filesize

    7.3MB

  • memory/1776-161-0x0000000002B10000-0x0000000003261000-memory.dmp
    Filesize

    7.3MB

  • memory/1776-145-0x00000000003D0000-0x0000000000B21000-memory.dmp
    Filesize

    7.3MB

  • memory/1776-147-0x00000000003D0000-0x0000000000B21000-memory.dmp
    Filesize

    7.3MB