Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    26-01-2021 14:20

General

  • Target

    DHL-#AWB130501923096PDF.exe

  • Size

    712KB

  • MD5

    13e8443bf19ea588b2c7a77251746fe8

  • SHA1

    62ae36fa6f7d5a21e026a8bbebed94bac81384e6

  • SHA256

    1372611a62207431985055ea8ecb4121b3dfb199e615102c06cc38e5aabdd65d

  • SHA512

    0dbcf414e821c737084e2d3cc378f5e8de1920ab2d41340d5c474316a051001f71cb47f0733cb588923d885455137c2b36993caecb160333bc23e539b9db6de9

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

185.162.88.26:20911

fenixalec.ddns.net:20911

Mutex

4c844ad7-de78-4c04-815b-d468ebb89811

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    fenixalec.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-10-25T21:31:56.793896536Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    20911

  • default_group

    2021 GREATEST

  • 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

    4c844ad7-de78-4c04-815b-d468ebb89811

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    185.162.88.26

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    true

  • 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 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DHL-#AWB130501923096PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\DHL-#AWB130501923096PDF.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:792
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "sweddf" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\vggfghbh.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1712
      • C:\Windows\SysWOW64\reg.exe
        REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "sweddf" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\vggfghbh.exe"
        3⤵
        • Adds Run key to start application
        PID:1012
    • C:\Users\Admin\AppData\Roaming\vggfghbh.exe
      "C:\Users\Admin\AppData\Roaming\vggfghbh.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:436
      • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
        "C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
        3⤵
        • Executes dropped EXE
        • Checks whether UAC is enabled
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:632

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe

    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe

    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • C:\Users\Admin\AppData\Roaming\vggfghbh.exe

    MD5

    13e8443bf19ea588b2c7a77251746fe8

    SHA1

    62ae36fa6f7d5a21e026a8bbebed94bac81384e6

    SHA256

    1372611a62207431985055ea8ecb4121b3dfb199e615102c06cc38e5aabdd65d

    SHA512

    0dbcf414e821c737084e2d3cc378f5e8de1920ab2d41340d5c474316a051001f71cb47f0733cb588923d885455137c2b36993caecb160333bc23e539b9db6de9

  • C:\Users\Admin\AppData\Roaming\vggfghbh.exe

    MD5

    13e8443bf19ea588b2c7a77251746fe8

    SHA1

    62ae36fa6f7d5a21e026a8bbebed94bac81384e6

    SHA256

    1372611a62207431985055ea8ecb4121b3dfb199e615102c06cc38e5aabdd65d

    SHA512

    0dbcf414e821c737084e2d3cc378f5e8de1920ab2d41340d5c474316a051001f71cb47f0733cb588923d885455137c2b36993caecb160333bc23e539b9db6de9

  • \Users\Admin\AppData\Local\Temp\InstallUtil.exe

    MD5

    91c9ae9c9a17a9db5e08b120e668c74c

    SHA1

    50770954c1ceb0bb6f1d5d3f2de2a0a065773723

    SHA256

    e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

    SHA512

    ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

  • \Users\Admin\AppData\Roaming\vggfghbh.exe

    MD5

    13e8443bf19ea588b2c7a77251746fe8

    SHA1

    62ae36fa6f7d5a21e026a8bbebed94bac81384e6

    SHA256

    1372611a62207431985055ea8ecb4121b3dfb199e615102c06cc38e5aabdd65d

    SHA512

    0dbcf414e821c737084e2d3cc378f5e8de1920ab2d41340d5c474316a051001f71cb47f0733cb588923d885455137c2b36993caecb160333bc23e539b9db6de9

  • memory/436-19-0x0000000004930000-0x0000000004931000-memory.dmp

    Filesize

    4KB

  • memory/436-16-0x00000000747A0000-0x0000000074E8E000-memory.dmp

    Filesize

    6.9MB

  • memory/436-24-0x0000000000B60000-0x0000000000B61000-memory.dmp

    Filesize

    4KB

  • memory/436-13-0x0000000000000000-mapping.dmp

  • memory/436-23-0x0000000000B30000-0x0000000000B3B000-memory.dmp

    Filesize

    44KB

  • memory/436-17-0x0000000000B80000-0x0000000000B81000-memory.dmp

    Filesize

    4KB

  • memory/632-30-0x00000000747A0000-0x0000000074E8E000-memory.dmp

    Filesize

    6.9MB

  • memory/632-28-0x000000000041E792-mapping.dmp

  • memory/632-36-0x0000000000450000-0x0000000000451000-memory.dmp

    Filesize

    4KB

  • memory/632-35-0x00000000007B0000-0x00000000007B3000-memory.dmp

    Filesize

    12KB

  • memory/632-34-0x0000000000790000-0x00000000007A9000-memory.dmp

    Filesize

    100KB

  • memory/632-33-0x00000000004F0000-0x00000000004F5000-memory.dmp

    Filesize

    20KB

  • memory/632-31-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/632-27-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/792-11-0x0000000004CE1000-0x0000000004CE2000-memory.dmp

    Filesize

    4KB

  • memory/792-3-0x0000000000290000-0x0000000000291000-memory.dmp

    Filesize

    4KB

  • memory/792-8-0x00000000005A0000-0x00000000005A1000-memory.dmp

    Filesize

    4KB

  • memory/792-5-0x0000000004CE0000-0x0000000004CE1000-memory.dmp

    Filesize

    4KB

  • memory/792-7-0x0000000000570000-0x000000000058E000-memory.dmp

    Filesize

    120KB

  • memory/792-2-0x00000000747A0000-0x0000000074E8E000-memory.dmp

    Filesize

    6.9MB

  • memory/1012-10-0x0000000000000000-mapping.dmp

  • memory/1712-9-0x0000000000000000-mapping.dmp