Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/03/2024, 04:12

General

  • Target
    ba7afb5a0e82c0cf7859aed73d6caaf1.exe
  • Size 686KB
  • Sample240308-eshrlaeh98
  • SHA256 0b80534156e48e7cf56ea49b69af09c18b44956d177a6558020fbf94d723e6f6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • yota890.hopto.org:23890

  • 127.0.0.1:23890

Mutex
  • 533a35a8-575b-4ab4-8925-c191b861d6ad

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-03-21T14:41:16.230670836Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    23890

  • default_group

    Yota

  • enable_debug_mode

    true

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.048576e+07

  • mutex

    533a35a8-575b-4ab4-8925-c191b861d6ad

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    yota890.hopto.org

  • primary_dns_server

    yota890.hopto.org

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    50

  • run_on_startup

    false

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Signatures

  • NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe
    "C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:752
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4600
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uNAcxkbcsJT.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:944
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uNAcxkbcsJT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4DD.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3320
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uNAcxkbcsJT.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4408
    • C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe
      "C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe"
      2⤵
        PID:3704
      • C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe
        "C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe"
        2⤵
          PID:2196
        • C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe
          "C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe"
          2⤵
            PID:4484
          • C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe
            "C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe"
            2⤵
              PID:3324
            • C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe
              "C:\Users\Admin\AppData\Local\Temp\ba7afb5a0e82c0cf7859aed73d6caaf1.exe"
              2⤵
              • Adds Run key to start application
              • Checks whether UAC is enabled
              • Drops file in Program Files directory
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:2076
              • C:\Windows\SysWOW64\schtasks.exe
                "schtasks.exe" /create /f /tn "SAAS Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp952.tmp"
                3⤵
                • Creates scheduled task(s)
                PID:4336
              • C:\Windows\SysWOW64\schtasks.exe
                "schtasks.exe" /create /f /tn "SAAS Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpCDD.tmp"
                3⤵
                • Creates scheduled task(s)
                PID:3260

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

                powershell.exe.log

                • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
                • Size 2KB
                • SHA256 92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
                • MD5 SHA1 SHA512

                StartupProfileData-NonInteractive

                • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                • Size 18KB
                • SHA256 417080f3a691a213db071238437ac92aa73c1cca26b9f6e456c5a0b916aba1e9
                • MD5 SHA1 SHA512 SSDEEP

                StartupProfileData-NonInteractive

                • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                • Size 18KB
                • SHA256 e2a878e65acb110128bfe78542420552ad7ff03ce70a4486b5f641e3234665ac
                • MD5 SHA1 SHA512 SSDEEP

                __PSScriptPolicyTest_wzwaabxp.zhx.ps1

                • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wzwaabxp.zhx.ps1
                • Size 60B
                • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                • MD5 SHA1 SHA512

                tmp4DD.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\tmp4DD.tmp
                • Size 1KB
                • SHA256 510e3718783307fcd04e78a53838e232292836760f45858e509648c5e84776e7
                • MD5 SHA1 SHA512

                tmp952.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\tmp952.tmp
                • Size 1KB
                • SHA256 ff54f68c72c4daf5a6edf0dd480460a334818c161798f11cb2a23ea92a1602e2
                • MD5 SHA1 SHA512

                tmpCDD.tmp

                • Path C:\Users\Admin\AppData\Local\Temp\tmpCDD.tmp
                • Size 1KB
                • SHA256 f769b73883f96cefd35c438e8bdbe12c10a87ce11e09e4084474a85f6e4f8a10
                • MD5 SHA1 SHA512

                memory/752-3-0x0000000074730000-0x0000000074CE1000-memory.dmp

                memory/752-0-0x0000000074730000-0x0000000074CE1000-memory.dmp

                memory/752-4-0x0000000000F50000-0x0000000000F60000-memory.dmp

                memory/752-18-0x0000000074730000-0x0000000074CE1000-memory.dmp

                memory/752-2-0x0000000000F50000-0x0000000000F60000-memory.dmp

                memory/752-1-0x0000000074730000-0x0000000074CE1000-memory.dmp

                memory/944-113-0x0000000007410000-0x0000000007418000-memory.dmp

                memory/944-11-0x0000000004870000-0x00000000048A6000-memory.dmp

                memory/944-94-0x0000000072060000-0x00000000720AC000-memory.dmp

                memory/944-107-0x0000000007160000-0x000000000716A000-memory.dmp

                memory/944-110-0x0000000007320000-0x000000000732E000-memory.dmp

                memory/944-26-0x0000000004E00000-0x0000000004E22000-memory.dmp

                memory/944-112-0x0000000007430000-0x000000000744A000-memory.dmp

                memory/944-19-0x0000000004860000-0x0000000004870000-memory.dmp

                memory/944-119-0x00000000713B0000-0x0000000071B60000-memory.dmp

                memory/944-10-0x00000000713B0000-0x0000000071B60000-memory.dmp

                memory/944-14-0x0000000004EE0000-0x0000000005508000-memory.dmp

                memory/944-95-0x000000007F8C0000-0x000000007F8D0000-memory.dmp

                memory/2076-127-0x00000000017F0000-0x0000000001800000-memory.dmp

                memory/2076-12-0x0000000000400000-0x0000000000438000-memory.dmp

                memory/2076-126-0x0000000074730000-0x0000000074CE1000-memory.dmp

                memory/2076-28-0x0000000074730000-0x0000000074CE1000-memory.dmp

                memory/2076-125-0x00000000017F0000-0x0000000001800000-memory.dmp

                memory/2076-66-0x00000000017F0000-0x0000000001800000-memory.dmp

                memory/2076-124-0x0000000074730000-0x0000000074CE1000-memory.dmp

                memory/2076-21-0x0000000074730000-0x0000000074CE1000-memory.dmp

                memory/2076-20-0x00000000017F0000-0x0000000001800000-memory.dmp

                memory/4408-65-0x0000000005CC0000-0x0000000005D0C000-memory.dmp

                memory/4408-109-0x0000000007190000-0x00000000071A1000-memory.dmp

                memory/4408-25-0x00000000713B0000-0x0000000071B60000-memory.dmp

                memory/4408-30-0x0000000004860000-0x0000000004870000-memory.dmp

                memory/4408-31-0x0000000004860000-0x0000000004870000-memory.dmp

                memory/4408-120-0x00000000713B0000-0x0000000071B60000-memory.dmp

                memory/4408-71-0x0000000072060000-0x00000000720AC000-memory.dmp

                memory/4408-73-0x000000007F2A0000-0x000000007F2B0000-memory.dmp

                memory/4408-64-0x0000000005C90000-0x0000000005CAE000-memory.dmp

                memory/4408-106-0x0000000006F90000-0x0000000006FAA000-memory.dmp

                memory/4408-68-0x0000000004860000-0x0000000004870000-memory.dmp

                memory/4408-108-0x0000000007210000-0x00000000072A6000-memory.dmp

                memory/4600-72-0x0000000072060000-0x00000000720AC000-memory.dmp

                memory/4600-69-0x0000000006BB0000-0x0000000006BE2000-memory.dmp

                memory/4600-111-0x0000000007B20000-0x0000000007B34000-memory.dmp

                memory/4600-105-0x0000000007F20000-0x000000000859A000-memory.dmp

                memory/4600-38-0x0000000005FB0000-0x0000000006304000-memory.dmp

                memory/4600-27-0x0000000005ED0000-0x0000000005F36000-memory.dmp

                memory/4600-29-0x0000000005F40000-0x0000000005FA6000-memory.dmp

                memory/4600-67-0x0000000002C40000-0x0000000002C50000-memory.dmp

                memory/4600-70-0x000000007F7C0000-0x000000007F7D0000-memory.dmp

                memory/4600-93-0x00000000077B0000-0x0000000007853000-memory.dmp

                memory/4600-123-0x00000000713B0000-0x0000000071B60000-memory.dmp

                memory/4600-83-0x0000000006B90000-0x0000000006BAE000-memory.dmp

                memory/4600-16-0x0000000002C40000-0x0000000002C50000-memory.dmp

                memory/4600-17-0x0000000002C40000-0x0000000002C50000-memory.dmp

                memory/4600-13-0x00000000713B0000-0x0000000071B60000-memory.dmp