Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    05-09-2022 16:27

General

  • Target

    SecuriteInfo.com.W32.MSIL_Kryptik.DSR.gen.Eldorado.17895.exe

  • Size

    1.5MB

  • MD5

    3f2e73870793bf2c359618739bd46d7d

  • SHA1

    2b484126a9f2239de3485bb517b6c12a144c1a1f

  • SHA256

    1bc9fc8588f7db4618c9a65e672f3ee0e1bc15f4265b727b75c5a22f1d7b54d5

  • SHA512

    db98cfba58b208c5556d527c7082e573f2557395901c6a6a284ce848f7a2037aee2eda04d1940d1f79b7f24bf4d32e5ea7c45982eb8a10e5d9d7e556346dce25

  • SSDEEP

    49152:CBl7s9Cp4wu/OlghWTt2Ruus3lVrguSzlreQ:sl7s9CpRuWlghKt4/sPg1pSQ

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

godisgood1.hopto.org:7712

185.225.73.164:7712

Mutex

bcd7727e-ef56-4958-8ed9-949f5c5ea8f6

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    185.225.73.164

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-05-24T09:37:49.129028236Z

  • 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

    7712

  • 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

    bcd7727e-ef56-4958-8ed9-949f5c5ea8f6

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    godisgood1.hopto.org

  • 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
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 3 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.W32.MSIL_Kryptik.DSR.gen.Eldorado.17895.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.MSIL_Kryptik.DSR.gen.Eldorado.17895.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1500
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 11 > nul && REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "bil" /t REG_SZ /d "C:\Users\Admin\AppData\Local\bil.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1712
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 11
        3⤵
        • Runs ping.exe
        PID:1968
      • C:\Windows\SysWOW64\reg.exe
        REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "bil" /t REG_SZ /d "C:\Users\Admin\AppData\Local\bil.exe"
        3⤵
        • Adds Run key to start application
        PID:760
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 23 > nul && copy "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.MSIL_Kryptik.DSR.gen.Eldorado.17895.exe" "C:\Users\Admin\AppData\Local\bil.exe" && ping 127.0.0.1 -n 23 > nul && "C:\Users\Admin\AppData\Local\bil.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:524
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 23
        3⤵
        • Runs ping.exe
        PID:1692
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 23
        3⤵
        • Runs ping.exe
        PID:1740
      • C:\Users\Admin\AppData\Local\bil.exe
        "C:\Users\Admin\AppData\Local\bil.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1092
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
          4⤵
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1392
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "SCSI Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp3064.tmp"
            5⤵
            • Creates scheduled task(s)
            PID:776
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "SCSI Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp315F.tmp"
            5⤵
            • Creates scheduled task(s)
            PID:1544

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

Remote System Discovery

1
T1018

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp3064.tmp
    Filesize

    1KB

    MD5

    576bbaf398045c3843d452ec83208236

    SHA1

    8ed5b2500ae7a40cbfa6e9018a1d1f1e70cb1374

    SHA256

    33c0c2d72fa383e5988ce640febc5ac6a2bd71d4ae660b99e52234952e17467b

    SHA512

    e7cc0ea0b351c6a8618e14f03c00e88ef83e2f169e0b4d66513f580f0a9352fbfe429e57186362b69407150d566bbdadca2f7b574fc748cc140b3249be67f96a

  • C:\Users\Admin\AppData\Local\Temp\tmp315F.tmp
    Filesize

    1KB

    MD5

    4e71faa3a77029484cfaba423d96618f

    SHA1

    9c837d050bb43d69dc608af809c292e13bca4718

    SHA256

    c470f45efd2e7c4c5b88534a18965a78dce0f8e154d3e45a9d5569ad0e334bdb

    SHA512

    6d014de41352f2b0b494d94cd58188791e81d4e53578d0722110b6827793b735e19c614877f25c61b26233dea1b5f1998ba1240bdc8fa04c87b7e64a4ca15fe0

  • C:\Users\Admin\AppData\Local\bil.exe
    Filesize

    1.5MB

    MD5

    3f2e73870793bf2c359618739bd46d7d

    SHA1

    2b484126a9f2239de3485bb517b6c12a144c1a1f

    SHA256

    1bc9fc8588f7db4618c9a65e672f3ee0e1bc15f4265b727b75c5a22f1d7b54d5

    SHA512

    db98cfba58b208c5556d527c7082e573f2557395901c6a6a284ce848f7a2037aee2eda04d1940d1f79b7f24bf4d32e5ea7c45982eb8a10e5d9d7e556346dce25

  • C:\Users\Admin\AppData\Local\bil.exe
    Filesize

    1.5MB

    MD5

    3f2e73870793bf2c359618739bd46d7d

    SHA1

    2b484126a9f2239de3485bb517b6c12a144c1a1f

    SHA256

    1bc9fc8588f7db4618c9a65e672f3ee0e1bc15f4265b727b75c5a22f1d7b54d5

    SHA512

    db98cfba58b208c5556d527c7082e573f2557395901c6a6a284ce848f7a2037aee2eda04d1940d1f79b7f24bf4d32e5ea7c45982eb8a10e5d9d7e556346dce25

  • \Users\Admin\AppData\Local\bil.exe
    Filesize

    1.5MB

    MD5

    3f2e73870793bf2c359618739bd46d7d

    SHA1

    2b484126a9f2239de3485bb517b6c12a144c1a1f

    SHA256

    1bc9fc8588f7db4618c9a65e672f3ee0e1bc15f4265b727b75c5a22f1d7b54d5

    SHA512

    db98cfba58b208c5556d527c7082e573f2557395901c6a6a284ce848f7a2037aee2eda04d1940d1f79b7f24bf4d32e5ea7c45982eb8a10e5d9d7e556346dce25

  • memory/524-60-0x0000000000000000-mapping.dmp
  • memory/760-62-0x0000000000000000-mapping.dmp
  • memory/776-86-0x0000000000000000-mapping.dmp
  • memory/1092-70-0x00000000004D0000-0x0000000000504000-memory.dmp
    Filesize

    208KB

  • memory/1092-68-0x0000000000FE0000-0x000000000116E000-memory.dmp
    Filesize

    1.6MB

  • memory/1092-71-0x0000000000880000-0x000000000089A000-memory.dmp
    Filesize

    104KB

  • memory/1092-65-0x0000000000000000-mapping.dmp
  • memory/1092-72-0x0000000000A80000-0x0000000000A86000-memory.dmp
    Filesize

    24KB

  • memory/1392-79-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1392-95-0x0000000000AE0000-0x0000000000AEE000-memory.dmp
    Filesize

    56KB

  • memory/1392-105-0x0000000004E35000-0x0000000004E46000-memory.dmp
    Filesize

    68KB

  • memory/1392-101-0x0000000000E30000-0x0000000000E44000-memory.dmp
    Filesize

    80KB

  • memory/1392-102-0x0000000000E40000-0x0000000000E4E000-memory.dmp
    Filesize

    56KB

  • memory/1392-74-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1392-76-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1392-77-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1392-73-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1392-104-0x0000000000ED0000-0x0000000000EE4000-memory.dmp
    Filesize

    80KB

  • memory/1392-80-0x000000000041E792-mapping.dmp
  • memory/1392-82-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1392-84-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1392-103-0x0000000000EA0000-0x0000000000ECE000-memory.dmp
    Filesize

    184KB

  • memory/1392-99-0x0000000000D10000-0x0000000000D24000-memory.dmp
    Filesize

    80KB

  • memory/1392-100-0x0000000000D20000-0x0000000000D30000-memory.dmp
    Filesize

    64KB

  • memory/1392-97-0x0000000000BF0000-0x0000000000BFC000-memory.dmp
    Filesize

    48KB

  • memory/1392-90-0x0000000000460000-0x000000000046A000-memory.dmp
    Filesize

    40KB

  • memory/1392-91-0x0000000000540000-0x000000000055E000-memory.dmp
    Filesize

    120KB

  • memory/1392-92-0x00000000004F0000-0x00000000004FA000-memory.dmp
    Filesize

    40KB

  • memory/1392-94-0x0000000000AB0000-0x0000000000ACA000-memory.dmp
    Filesize

    104KB

  • memory/1392-93-0x0000000000AA0000-0x0000000000AB2000-memory.dmp
    Filesize

    72KB

  • memory/1392-96-0x0000000000B00000-0x0000000000B12000-memory.dmp
    Filesize

    72KB

  • memory/1392-98-0x0000000000C00000-0x0000000000C0E000-memory.dmp
    Filesize

    56KB

  • memory/1500-55-0x0000000075B41000-0x0000000075B43000-memory.dmp
    Filesize

    8KB

  • memory/1500-56-0x0000000000350000-0x0000000000384000-memory.dmp
    Filesize

    208KB

  • memory/1500-57-0x0000000000A60000-0x0000000000A78000-memory.dmp
    Filesize

    96KB

  • memory/1500-54-0x0000000000A80000-0x0000000000C0E000-memory.dmp
    Filesize

    1.6MB

  • memory/1544-88-0x0000000000000000-mapping.dmp
  • memory/1692-61-0x0000000000000000-mapping.dmp
  • memory/1712-58-0x0000000000000000-mapping.dmp
  • memory/1740-63-0x0000000000000000-mapping.dmp
  • memory/1968-59-0x0000000000000000-mapping.dmp