Analysis

  • max time kernel
    160s
  • max time network
    166s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    15-02-2022 07:31

General

  • Target

    a32a8a73376011de007c1fff66b6f5535a60df9ab22cbfaafc90784765f11e1b.exe

  • Size

    2.5MB

  • MD5

    a1f11a6043e639a2efc7b229a04be7e5

  • SHA1

    ec81bf43d8bcf36061a60f7ea4bd8b3a2337a251

  • SHA256

    a32a8a73376011de007c1fff66b6f5535a60df9ab22cbfaafc90784765f11e1b

  • SHA512

    fd8e8aecb53cdf74f5587452de8dfaea3438374aca95964d7939f9d9b96412b844044991663ad5e8079453cf11bbadd927e0cf12d366a7c36d2a6df8d4391b91

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Blocklisted process makes network request 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Windows directory 3 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 4 IoCs

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

  • Modifies data under HKEY_USERS 49 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a32a8a73376011de007c1fff66b6f5535a60df9ab22cbfaafc90784765f11e1b.exe
    "C:\Users\Admin\AppData\Local\Temp\a32a8a73376011de007c1fff66b6f5535a60df9ab22cbfaafc90784765f11e1b.exe"
    1⤵
    • Checks BIOS information in registry
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Checks processor information in registry
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3464
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\fpqdvxewwmrr.vbs"
      2⤵
        PID:3456
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\ctgivqxtq.vbs"
        2⤵
        • Blocklisted process makes network request
        PID:2136
    • C:\Windows\system32\MusNotifyIcon.exe
      %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
      1⤵
      • Checks processor information in registry
      PID:2300
    • C:\Windows\System32\svchost.exe
      C:\Windows\System32\svchost.exe -k NetworkService -p
      1⤵
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      PID:3616
    • 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:3312

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    Virtualization/Sandbox Evasion

    1
    T1497

    Discovery

    Query Registry

    4
    T1012

    Virtualization/Sandbox Evasion

    1
    T1497

    System Information Discovery

    5
    T1082

    Command and Control

    Web Service

    1
    T1102

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751
      MD5

      54e9306f95f32e50ccd58af19753d929

      SHA1

      eab9457321f34d4dcf7d4a0ac83edc9131bf7c57

      SHA256

      45f94dceb18a8f738a26da09ce4558995a4fe02b971882e8116fc9b59813bb72

      SHA512

      8711a4d866f21cdf4d4e6131ec4cfaf6821d0d22b90946be8b5a09ab868af0270a89bc326f03b858f0361a83c11a1531b894dfd1945e4812ba429a7558791f4f

    • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751
      MD5

      bc3ca7533f0dc1cc219e83deafaf734e

      SHA1

      45a8cb5813d190a469abd33646c3a987d8787477

      SHA256

      3857a939155ddaf3055cb46850a288513fc7b0066fcbb8f52a37a6304e585683

      SHA512

      beb4b0f2f3f120dee19e5c589c055badc87dc3a4818dc6ad255a8af45d9cc1a105a069819bf4fd224c731e535ba9620c70d14aa3379ce43d00ac87d9ca525ab9

    • C:\Users\Admin\AppData\Local\Temp\ctgivqxtq.vbs
      MD5

      540ee5573bb4a1f459888799424356dd

      SHA1

      4230eb00521ff8cb20a1db058fc0dbd475453802

      SHA256

      35cf93512449bea5a612616a656bd16283b9c27b26759e0eeb1c09dd52c738a2

      SHA512

      a62b4fc3b6f26b0e1e0ffc91323e174fd4c910c974e3bd2b026d9104ca4b4444201e3008c7af2d450ae75befd48d57b0718c43e96344389ef2baf1392197239a

    • C:\Users\Admin\AppData\Local\Temp\fpqdvxewwmrr.vbs
      MD5

      3a48a6ee7e42ec555cb150a34cdf9448

      SHA1

      4c52229d828a23b6afda5180c16420bf5cb927f9

      SHA256

      7458d7bfd2fab44b43b37c659293aa2901c651fcc37e2a7c6baacdbf20347b8c

      SHA512

      12734910752175c06e72999c7d05c5294bbaba9321337d6ad3c1694cc4bb6962288fa638ea385e9321497462137d3a62295281eb962e790bfa34daeba5121f81

    • memory/3464-130-0x0000000077404000-0x0000000077406000-memory.dmp
      Filesize

      8KB

    • memory/3464-131-0x00000000001C0000-0x0000000000841000-memory.dmp
      Filesize

      6.5MB

    • memory/3464-132-0x00000000001C0000-0x0000000000841000-memory.dmp
      Filesize

      6.5MB

    • memory/3464-133-0x00000000001C0000-0x0000000000841000-memory.dmp
      Filesize

      6.5MB