Analysis

  • max time kernel
    139s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    07-09-2022 21:47

General

  • Target

    SecuriteInfo.com.Win32.CrypterX-gen.exe

  • Size

    564KB

  • MD5

    d2511f548930bc0a616afb4bf2f5eb59

  • SHA1

    dfd9d5479816b67c213fa35f87280c192d1a20a1

  • SHA256

    d867f1bbf4a3d8e8de9ce9c75d7d1690a9ab15ba919ed0d01f6bc66683e074c4

  • SHA512

    e9922aefdd68bfbb1773ccf75f2412af987e67570d876bfd99aee5fd46c616a430fe8ec9fc1917a797ca3d433d94cc81e87ca5fe8eea38638361b4bbacd6651e

  • SSDEEP

    12288:g8l02b1zzUFFiRUUWgSXGjITqZfs+Bog:blfzzUFAKDlW8Tqf

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

brewsterchristophe.ddns.net:5899

194,147,5,75:5899

Mutex

b8aebc29-8c64-444f-99e6-dc4122e9bbfc

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    194,147,5,75

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-04-29T03:26:40.572298236Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    5899

  • default_group

    Default

  • 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

    b8aebc29-8c64-444f-99e6-dc4122e9bbfc

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    brewsterchristophe.ddns.net

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • 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.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Runs ping.exe 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:896
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 14 > nul && REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "Bin" /t REG_SZ /d "C:\Users\Admin\Desktop\Bin.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:904
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 14
        3⤵
        • Runs ping.exe
        PID:456
      • C:\Windows\SysWOW64\reg.exe
        REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "Bin" /t REG_SZ /d "C:\Users\Admin\Desktop\Bin.exe"
        3⤵
        • Adds Run key to start application
        PID:1812
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 19 > nul && copy "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.exe" "C:\Users\Admin\Desktop\Bin.exe" && ping 127.0.0.1 -n 19 > nul && "C:\Users\Admin\Desktop\Bin.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1188
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 19
        3⤵
        • Runs ping.exe
        PID:1012
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 19
        3⤵
        • Runs ping.exe
        PID:1192
      • C:\Users\Admin\Desktop\Bin.exe
        "C:\Users\Admin\Desktop\Bin.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1556
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          4⤵
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1160
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "UDP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6F57.tmp"
            5⤵
            • Creates scheduled task(s)
            PID:1200
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "UDP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp70AF.tmp"
            5⤵
            • Creates scheduled task(s)
            PID:364

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

1
T1082

Remote System Discovery

1
T1018

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp6F57.tmp
    Filesize

    1KB

    MD5

    48ef7fa9033389ad7929d7a6b9d10298

    SHA1

    9db6cb7325c8bdf66a15f7b5f34703709a45aeb6

    SHA256

    0c1b5f67eeb276d1d4205b138ce32bc6149924e02281a2db8e4623a700e88f15

    SHA512

    ac8bd104ecbacc9bccce9e087f67e5b18072d59367ccd31d4e66132b6baaea520cba5b9b59464483d86abf74826b382c402f12e9a586c99bda8c78a0de33944e

  • C:\Users\Admin\AppData\Local\Temp\tmp70AF.tmp
    Filesize

    1KB

    MD5

    0a24db62cb5b84309c4803346caaa25d

    SHA1

    67660778f61bb44168c33ed3fe56ed86cf9583e8

    SHA256

    38d38647af394a04ee6add9f05c43244f04e64a6b96257f4b241a5038efa82df

    SHA512

    d25d9df063f44595d5e0bf890755bd387655131ff369eeedf3d11ffcc6202ca4455bbb33a8a926dd06839cbd1ddec3d06809b3c66a82c6518aa14beaa469a548

  • C:\Users\Admin\Desktop\Bin.exe
    Filesize

    564KB

    MD5

    d2511f548930bc0a616afb4bf2f5eb59

    SHA1

    dfd9d5479816b67c213fa35f87280c192d1a20a1

    SHA256

    d867f1bbf4a3d8e8de9ce9c75d7d1690a9ab15ba919ed0d01f6bc66683e074c4

    SHA512

    e9922aefdd68bfbb1773ccf75f2412af987e67570d876bfd99aee5fd46c616a430fe8ec9fc1917a797ca3d433d94cc81e87ca5fe8eea38638361b4bbacd6651e

  • C:\Users\Admin\Desktop\Bin.exe
    Filesize

    564KB

    MD5

    d2511f548930bc0a616afb4bf2f5eb59

    SHA1

    dfd9d5479816b67c213fa35f87280c192d1a20a1

    SHA256

    d867f1bbf4a3d8e8de9ce9c75d7d1690a9ab15ba919ed0d01f6bc66683e074c4

    SHA512

    e9922aefdd68bfbb1773ccf75f2412af987e67570d876bfd99aee5fd46c616a430fe8ec9fc1917a797ca3d433d94cc81e87ca5fe8eea38638361b4bbacd6651e

  • memory/364-86-0x0000000000000000-mapping.dmp
  • memory/456-59-0x0000000000000000-mapping.dmp
  • memory/896-55-0x0000000075041000-0x0000000075043000-memory.dmp
    Filesize

    8KB

  • memory/896-56-0x0000000001DC0000-0x0000000001DF4000-memory.dmp
    Filesize

    208KB

  • memory/896-57-0x0000000001F00000-0x0000000001F18000-memory.dmp
    Filesize

    96KB

  • memory/896-54-0x0000000000070000-0x0000000000102000-memory.dmp
    Filesize

    584KB

  • memory/904-58-0x0000000000000000-mapping.dmp
  • memory/1012-61-0x0000000000000000-mapping.dmp
  • memory/1160-93-0x0000000000510000-0x000000000051E000-memory.dmp
    Filesize

    56KB

  • memory/1160-94-0x0000000000610000-0x0000000000622000-memory.dmp
    Filesize

    72KB

  • memory/1160-103-0x0000000000495000-0x00000000004A6000-memory.dmp
    Filesize

    68KB

  • memory/1160-102-0x00000000008B0000-0x00000000008C4000-memory.dmp
    Filesize

    80KB

  • memory/1160-71-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1160-72-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1160-74-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1160-75-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1160-77-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1160-78-0x000000000041E792-mapping.dmp
  • memory/1160-80-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1160-82-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1160-101-0x0000000000940000-0x000000000096E000-memory.dmp
    Filesize

    184KB

  • memory/1160-100-0x0000000000890000-0x000000000089E000-memory.dmp
    Filesize

    56KB

  • memory/1160-99-0x0000000000840000-0x0000000000854000-memory.dmp
    Filesize

    80KB

  • memory/1160-98-0x0000000000830000-0x0000000000840000-memory.dmp
    Filesize

    64KB

  • memory/1160-88-0x0000000000290000-0x000000000029A000-memory.dmp
    Filesize

    40KB

  • memory/1160-89-0x00000000002A0000-0x00000000002BE000-memory.dmp
    Filesize

    120KB

  • memory/1160-90-0x00000000002C0000-0x00000000002CA000-memory.dmp
    Filesize

    40KB

  • memory/1160-91-0x00000000003F0000-0x0000000000402000-memory.dmp
    Filesize

    72KB

  • memory/1160-92-0x00000000005A0000-0x00000000005BA000-memory.dmp
    Filesize

    104KB

  • memory/1160-97-0x0000000000820000-0x0000000000834000-memory.dmp
    Filesize

    80KB

  • memory/1160-96-0x0000000000670000-0x000000000067E000-memory.dmp
    Filesize

    56KB

  • memory/1160-95-0x0000000000660000-0x000000000066C000-memory.dmp
    Filesize

    48KB

  • memory/1188-60-0x0000000000000000-mapping.dmp
  • memory/1192-63-0x0000000000000000-mapping.dmp
  • memory/1200-84-0x0000000000000000-mapping.dmp
  • memory/1556-67-0x0000000000FF0000-0x0000000001082000-memory.dmp
    Filesize

    584KB

  • memory/1556-64-0x0000000000000000-mapping.dmp
  • memory/1556-70-0x0000000000DA0000-0x0000000000DA6000-memory.dmp
    Filesize

    24KB

  • memory/1556-69-0x0000000004490000-0x00000000044AA000-memory.dmp
    Filesize

    104KB

  • memory/1812-62-0x0000000000000000-mapping.dmp