Analysis

  • max time kernel
    88s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/01/2024, 20:32

General

  • Target

    tmp.exe

  • Size

    210KB

  • MD5

    f598543eb3fca36826b95c8934c18440

  • SHA1

    d01513a81db37519eaae0faa8e54ee194d73103c

  • SHA256

    1b0f0f68bba4c25b14187378bebf8db9dce85ec634e7375b53a287ad2dc12ea2

  • SHA512

    dd971a469879b3c2b7c8b8f2edeca47ef9a0f6f12e788f3a3958f924b7f7442372ec8392e057489f32f12d35c456a8888e677d1995c0f1f68fd1272ed97dfe5a

  • SSDEEP

    6144:gLV6Bta6dtJmakIM5c/C++adghMiGFajp8:gLV6Btpmk7/Csdghbsn

Malware Config

Signatures

  • NanoCore

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 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.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • 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:3056
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp41FA.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2792
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "SMTP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4259.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1360

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp41FA.tmp

    Filesize

    1KB

    MD5

    3f4dcafa44c36f23e4db2b2315fd09da

    SHA1

    8c83089d6f6c887a77af9b42ca09969f3b2f83f6

    SHA256

    b8475eb97200b8a15eaf07e0a2cddc5c95e5bc3e7a98685364c9796480de57dc

    SHA512

    e0624dd6cf0d5e014e96a323d2f7ebe13b683af71bd6ddafa3005cdc2f3c764cfca509262d442fc844b4b390d241ccf3eb36d30043d3d6f6e955a2ee9f792678

  • C:\Users\Admin\AppData\Local\Temp\tmp4259.tmp

    Filesize

    1KB

    MD5

    0339b45ef206f4becc88be0d65e24b9e

    SHA1

    6503a1851f4ccd8c80a31f96bd7ae40d962c9fad

    SHA256

    3d568a47a8944a47f4aed6982755ac7ff7dda469cc1c81c213ecaa5d89de1f83

    SHA512

    c98f4513db34d50510dd986e0d812545c442bd5bef26932032b165759627fab4e00c95fe907ab3416a8a1042bfa77aa516c479f1ff7d1ec2f21ae66df8f72551

  • memory/3056-0-0x0000000074DD0000-0x0000000075381000-memory.dmp

    Filesize

    5.7MB

  • memory/3056-1-0x0000000074DD0000-0x0000000075381000-memory.dmp

    Filesize

    5.7MB

  • memory/3056-2-0x00000000015D0000-0x00000000015E0000-memory.dmp

    Filesize

    64KB

  • memory/3056-10-0x00000000015D0000-0x00000000015E0000-memory.dmp

    Filesize

    64KB

  • memory/3056-19-0x0000000074DD0000-0x0000000075381000-memory.dmp

    Filesize

    5.7MB

  • memory/3056-20-0x0000000074DD0000-0x0000000075381000-memory.dmp

    Filesize

    5.7MB

  • memory/3056-21-0x00000000015D0000-0x00000000015E0000-memory.dmp

    Filesize

    64KB

  • memory/3056-22-0x00000000015D0000-0x00000000015E0000-memory.dmp

    Filesize

    64KB