Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10-en-20211014
  • submitted
    19-10-2021 14:27

General

  • Target

    d2eaaa542a2968b2a9ebe288166779e8.exe

  • Size

    63KB

  • MD5

    d2eaaa542a2968b2a9ebe288166779e8

  • SHA1

    37bcd26dcd35f9dd16bd8aff7cad425f3898309c

  • SHA256

    f605ba8fe94eb367829b61cd05eb5b07f4702b55f2a0faf51589cb46dd6f89a9

  • SHA512

    059a1aed6e654fb4465e11f7a0687ac4e6ec0bc17f4ca2726f1bf4f069c1c757b3577d0dd3e5f5b31cfd9e7c0750ffd2880da31053f5ad8f258227029df3e89a

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

cloudhost.myfirewall.org:5654

Mutex

9845a945-f2ff-4e93-b909-aece664ddb48

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    cloudhost.myfirewall.org

  • backup_dns_server

    cloudhost.myfirewall.org

  • buffer_size

    65535

  • build_time

    2021-06-20T04:14:27.248073436Z

  • 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

    5654

  • default_group

    J

  • 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

    9845a945-f2ff-4e93-b909-aece664ddb48

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    cloudhost.myfirewall.org

  • primary_dns_server

    cloudhost.myfirewall.org

  • 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.

  • 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
  • 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 5 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d2eaaa542a2968b2a9ebe288166779e8.exe
    "C:\Users\Admin\AppData\Local\Temp\d2eaaa542a2968b2a9ebe288166779e8.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2268
    • C:\Users\Admin\AppData\Local\Temp\d2eaaa542a2968b2a9ebe288166779e8.exe
      C:\Users\Admin\AppData\Local\Temp\d2eaaa542a2968b2a9ebe288166779e8.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:1052
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SMTP Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp3890.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:2072
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SMTP Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp39CA.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:3580

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

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\d2eaaa542a2968b2a9ebe288166779e8.exe.log
    MD5

    808e884c00533a9eb0e13e64960d9c3a

    SHA1

    279d05181fc6179a12df1a669ff5d8b64c1380ae

    SHA256

    2f6a0aab99b1c228a6642f44f8992646ce84c5a2b3b9941b6cf1f2badf67bdd6

    SHA512

    9489bdb2ffdfeef3c52edcfe9b34c6688eba53eb86075e0564df1cd474723c86b5b5aedc12df1ff5fc12cf97bd1e3cf9701ff61dc4ce90155d70e9ccfd0fc299

  • C:\Users\Admin\AppData\Local\Temp\tmp3890.tmp
    MD5

    dbfc5e273d2e8c0a1e89317aebe012b5

    SHA1

    6bf4879b8982db970087c0f38d71384e10fd6f4f

    SHA256

    9c4cf0fc2fc4a8daeb4fe1943f065e21bee8ee49181c7f08cc7c209a79f649a8

    SHA512

    0220f0cda054e4b6c86b6318c00b561cbb61457ace62854c14af52a495f7391b597f437458001cf5ea349963e50f59e26a71b5476b6e7da51dab214e93f64eec

  • C:\Users\Admin\AppData\Local\Temp\tmp39CA.tmp
    MD5

    b3b017f9df206021717a11f11d895402

    SHA1

    e4ea12823af6550ee634536eec1eb14490580a3b

    SHA256

    654dfce2c28024364e679e1b958f3fb81fc6d29685d534d905d1c83a84351024

    SHA512

    95666cb81aa1fd1ade04a32f63381ce8bff274d7d300c0b59cbb10a294c4d1eebaa3000365a2000b38793de030044995cf23e623c5e3648d9b00501f97ff9343

  • memory/1052-126-0x00000000050D0000-0x00000000050D1000-memory.dmp
    Filesize

    4KB

  • memory/1052-128-0x0000000004FF0000-0x0000000004FF1000-memory.dmp
    Filesize

    4KB

  • memory/1052-121-0x000000000041E792-mapping.dmp
  • memory/1052-136-0x0000000005350000-0x0000000005353000-memory.dmp
    Filesize

    12KB

  • memory/1052-125-0x0000000005530000-0x0000000005531000-memory.dmp
    Filesize

    4KB

  • memory/1052-135-0x00000000050B0000-0x00000000050C9000-memory.dmp
    Filesize

    100KB

  • memory/1052-127-0x0000000005170000-0x0000000005171000-memory.dmp
    Filesize

    4KB

  • memory/1052-120-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/1052-134-0x0000000005080000-0x0000000005085000-memory.dmp
    Filesize

    20KB

  • memory/1052-130-0x0000000005030000-0x000000000552E000-memory.dmp
    Filesize

    5.0MB

  • memory/2072-129-0x0000000000000000-mapping.dmp
  • memory/2268-118-0x0000000005960000-0x00000000059BB000-memory.dmp
    Filesize

    364KB

  • memory/2268-117-0x0000000004DD0000-0x0000000004DD1000-memory.dmp
    Filesize

    4KB

  • memory/2268-115-0x0000000000340000-0x0000000000341000-memory.dmp
    Filesize

    4KB

  • memory/2268-119-0x0000000005B40000-0x0000000005B73000-memory.dmp
    Filesize

    204KB

  • memory/3580-132-0x0000000000000000-mapping.dmp