Analysis

  • max time kernel
    35s
  • max time network
    156s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    22-07-2021 08:02

General

  • Target

    b0876b8da9dcb8a3b22d2cbf2b6a4711.exe

  • Size

    552KB

  • MD5

    b0876b8da9dcb8a3b22d2cbf2b6a4711

  • SHA1

    80e619da78e64bf6845f284c50bfacf17c55a274

  • SHA256

    d6215a4b16d74db6dafc28a78f15885de77570347acfbac416f18b223ba08e26

  • SHA512

    3b52e3aba69434d0b13e26b359f28493c303593bfdb254d86d3f91f7bfde8f318bb11ffb3a9ee26547ee389ef181eb61e863e2060f2a950f6ebf0af94d26a146

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

asweee.jumpingcrab.com:8234

tryweaswweee.ydns.eu:8234

Mutex

0bb207a5-6f92-4ff1-abb5-35e0dc25fe5d

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    tryweaswweee.ydns.eu

  • backup_dns_server

    tryweaswweee.ydns.eu

  • buffer_size

    65535

  • build_time

    2021-05-02T14:48:34.703881636Z

  • 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

    8234

  • default_group

    AUGUST

  • 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

    0bb207a5-6f92-4ff1-abb5-35e0dc25fe5d

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    asweee.jumpingcrab.com

  • primary_dns_server

    asweee.jumpingcrab.com

  • 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.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b0876b8da9dcb8a3b22d2cbf2b6a4711.exe
    "C:\Users\Admin\AppData\Local\Temp\b0876b8da9dcb8a3b22d2cbf2b6a4711.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:632
    • C:\Users\Admin\AppData\Local\Temp\b0876b8da9dcb8a3b22d2cbf2b6a4711.exe
      C:\Users\Admin\AppData\Local\Temp\b0876b8da9dcb8a3b22d2cbf2b6a4711.exe
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2596
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "UPNP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp27FB.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:348

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\b0876b8da9dcb8a3b22d2cbf2b6a4711.exe.log
    MD5

    9e7845217df4a635ec4341c3d52ed685

    SHA1

    d65cb39d37392975b038ce503a585adadb805da5

    SHA256

    d60e596ed3d5c13dc9f1660e6d870d99487e1383891437645c4562a9ecaa8c9b

    SHA512

    307c3b4d4f2655bdeb177e7b9c981ca27513618903f02c120caa755c9da5a8dd03ebab660b56108a680720a97c1e9596692490aede18cc4bd77b9fc3d8e68aa1

  • C:\Users\Admin\AppData\Local\Temp\tmp27FB.tmp
    MD5

    4e5f6cfdbfd4c5f38cbbc0166c0c5904

    SHA1

    dccd07be924c706810eb0dedf89d8464dfe8e15d

    SHA256

    ae8e86367fbfaadef8a7c43b61630da8bbacad62aeea561a8bc966cd4bbc377a

    SHA512

    8261d46a3348c5bceabb49ece838801205df9436ec59774a2fb051b886701bd593fe7b820750f68e7afc2e47ad559ff3ebc7bff425d7d0b6cae5379edd181356

  • memory/348-135-0x0000000000000000-mapping.dmp
  • memory/632-116-0x0000000005800000-0x0000000005801000-memory.dmp
    Filesize

    4KB

  • memory/632-117-0x0000000005300000-0x0000000005301000-memory.dmp
    Filesize

    4KB

  • memory/632-118-0x0000000005290000-0x0000000005291000-memory.dmp
    Filesize

    4KB

  • memory/632-119-0x0000000005300000-0x00000000057FE000-memory.dmp
    Filesize

    5.0MB

  • memory/632-120-0x0000000007590000-0x00000000075EF000-memory.dmp
    Filesize

    380KB

  • memory/632-125-0x0000000007900000-0x0000000007962000-memory.dmp
    Filesize

    392KB

  • memory/632-114-0x0000000000920000-0x0000000000921000-memory.dmp
    Filesize

    4KB

  • memory/2596-138-0x00000000052D0000-0x00000000052E9000-memory.dmp
    Filesize

    100KB

  • memory/2596-143-0x0000000006930000-0x0000000006936000-memory.dmp
    Filesize

    24KB

  • memory/2596-127-0x000000000041E792-mapping.dmp
  • memory/2596-137-0x00000000052C0000-0x00000000052C5000-memory.dmp
    Filesize

    20KB

  • memory/2596-126-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/2596-139-0x0000000006180000-0x0000000006183000-memory.dmp
    Filesize

    12KB

  • memory/2596-140-0x0000000004FA0000-0x0000000005032000-memory.dmp
    Filesize

    584KB

  • memory/2596-141-0x0000000006190000-0x000000000619D000-memory.dmp
    Filesize

    52KB

  • memory/2596-142-0x00000000068F0000-0x0000000006905000-memory.dmp
    Filesize

    84KB

  • memory/2596-133-0x00000000050F0000-0x00000000050F1000-memory.dmp
    Filesize

    4KB

  • memory/2596-144-0x0000000006940000-0x000000000694C000-memory.dmp
    Filesize

    48KB

  • memory/2596-145-0x0000000006950000-0x0000000006957000-memory.dmp
    Filesize

    28KB

  • memory/2596-146-0x0000000006960000-0x0000000006966000-memory.dmp
    Filesize

    24KB

  • memory/2596-147-0x0000000006970000-0x000000000697D000-memory.dmp
    Filesize

    52KB

  • memory/2596-148-0x0000000006980000-0x0000000006989000-memory.dmp
    Filesize

    36KB

  • memory/2596-149-0x0000000006990000-0x000000000699F000-memory.dmp
    Filesize

    60KB

  • memory/2596-150-0x00000000069B0000-0x00000000069BA000-memory.dmp
    Filesize

    40KB

  • memory/2596-151-0x00000000069C0000-0x00000000069E9000-memory.dmp
    Filesize

    164KB

  • memory/2596-152-0x0000000006A00000-0x0000000006A0F000-memory.dmp
    Filesize

    60KB

  • memory/2596-153-0x0000000006BE0000-0x0000000006BE1000-memory.dmp
    Filesize

    4KB