Analysis

  • max time kernel
    152s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    28-11-2022 17:57

General

  • Target

    357fd1a00c2f8dd56bdcff21a3eeb2d37f38b7c1e3dab18dc80d7962569ec97f.exe

  • Size

    1.2MB

  • MD5

    9ea94e6de35b9dcfacfea2139289617c

  • SHA1

    4fa4c36845256a206a61b59b8106aa3f0d7a6b7a

  • SHA256

    357fd1a00c2f8dd56bdcff21a3eeb2d37f38b7c1e3dab18dc80d7962569ec97f

  • SHA512

    c32ecdae46a9114a6e9dd6f02c092b04f44aca42d19a085cf157d1d1666041aa7c027f1df42b6e35ca1328efefd6951d607447619e89a993153ef0c35170488f

  • SSDEEP

    24576:Iumi5xwefClMfhmcStJcyEGKKZEhNqBEV3C9RG4X6or:d1fVfcNc0KPhNwEd8RG4XBr

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

krieten.zapto.org:56702

127.0.0.1:56702

Mutex

72085997-76b8-4d60-82e2-47139dff7845

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2014-12-11T16:22:47.385658436Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTE2Ij8+DQo8VGFzayB2ZXJzaW9uPSIxLjIiIHhtbG5zPSJodHRwOi8vc2NoZW1hcy5taWNyb3NvZnQuY29tL3dpbmRvd3MvMjAwNC8wMi9taXQvdGFzayI+DQogIDxSZWdpc3RyYXRpb25JbmZvIC8+DQogIDxUcmlnZ2VycyAvPg0KICA8UHJpbmNpcGFscz4NCiAgICA8UHJpbmNpcGFsIGlkPSJBdXRob3IiPg0KICAgICAgPExvZ29uVHlwZT5JbnRlcmFjdGl2ZVRva2VuPC9Mb2dvblR5cGU+DQogICAgICA8UnVuTGV2ZWw+SGlnaGVzdEF2YWlsYWJsZTwvUnVuTGV2ZWw+DQogICAgPC9QcmluY2lwYWw+DQogIDwvUHJpbmNpcGFscz4NCiAgPFNldHRpbmdzPg0KICAgIDxNdWx0aXBsZUluc3RhbmNlc1BvbGljeT5QYXJhbGxlbDwvTXVsdGlwbGVJbnN0YW5jZXNQb2xpY3k+DQogICAgPERpc2FsbG93U3RhcnRJZk9uQmF0dGVyaWVzPmZhbHNlPC9EaXNhbGxvd1N0YXJ0SWZPbkJhdHRlcmllcz4NCiAgICA8U3RvcElmR29pbmdPbkJhdHRlcmllcz5mYWxzZTwvU3RvcElmR29pbmdPbkJhdHRlcmllcz4NCiAgICA8QWxsb3dIYXJkVGVybWluYXRlPnRydWU8L0FsbG93SGFyZFRlcm1pbmF0ZT4NCiAgICA8U3RhcnRXaGVuQXZhaWxhYmxlPmZhbHNlPC9TdGFydFdoZW5BdmFpbGFibGU+DQogICAgPFJ1bk9ubHlJZk5ldHdvcmtBdmFpbGFibGU+ZmFsc2U8L1J1bk9ubHlJZk5ldHdvcmtBdmFpbGFibGU+DQogICAgPElkbGVTZXR0aW5ncz4NCiAgICAgIDxTdG9wT25JZGxlRW5kPmZhbHNlPC9TdG9wT25JZGxlRW5kPg0KICAgICAgPFJlc3RhcnRPbklkbGU+ZmFsc2U8L1Jlc3RhcnRPbklkbGU+DQogICAgPC9JZGxlU2V0dGluZ3M+DQogICAgPEFsbG93U3RhcnRPbkRlbWFuZD50cnVlPC9BbGxvd1N0YXJ0T25EZW1hbmQ+DQogICAgPEVuYWJsZWQ+dHJ1ZTwvRW5hYmxlZD4NCiAgICA8SGlkZGVuPmZhbHNlPC9IaWRkZW4+DQogICAgPFJ1bk9ubHlJZklkbGU+ZmFsc2U8L1J1bk9ubHlJZklkbGU+DQogICAgPFdha2VUb1J1bj5mYWxzZTwvV2FrZVRvUnVuPg0KICAgIDxFeGVjdXRpb25UaW1lTGltaXQ+UFQwUzwvRXhlY3V0aW9uVGltZUxpbWl0Pg0KICAgIDxQcmlvcml0eT40PC9Qcmlvcml0eT4NCiAgPC9TZXR0aW5ncz4NCiAgPEFjdGlvbnMgQ29udGV4dD0iQXV0aG9yIj4NCiAgICA8RXhlYz4NCiAgICAgIDxDb21tYW5kPiIjRVhFQ1VUQUJMRVBBVEgiPC9Db21tYW5kPg0KICAgICAgPEFyZ3VtZW50cz4kKEFyZzApPC9Bcmd1bWVudHM+DQogICAgPC9FeGVjPg0KICA8L0FjdGlvbnM+DQo8L1Rhc2s+

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    56702

  • default_group

    Gruppe8

  • 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

    72085997-76b8-4d60-82e2-47139dff7845

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    krieten.zapto.org

  • 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

    19994

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • NanoCore

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

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 2 IoCs
  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 8 IoCs
  • Suspicious use of WriteProcessMemory 58 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\357fd1a00c2f8dd56bdcff21a3eeb2d37f38b7c1e3dab18dc80d7962569ec97f.exe
    "C:\Users\Admin\AppData\Local\Temp\357fd1a00c2f8dd56bdcff21a3eeb2d37f38b7c1e3dab18dc80d7962569ec97f.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:916
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c C:\Users\Admin\AppData\Local\Temp\FolderName\mata.bat
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1000
      • C:\Windows\SysWOW64\wscript.exe
        wscript.exe "C:\Users\Admin\AppData\Local\Temp\FolderName\invs.vbs" "C:\Users\Admin\AppData\Local\Temp\FolderName\mata2.bat"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2008
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Local\Temp\FolderName\mata2.bat" "
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1492
          • C:\Windows\SysWOW64\reg.exe
            reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Shell /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\FolderName\svhost.exe" /f
            5⤵
            • Modifies WinLogon for persistence
            PID:688
    • C:\Users\Admin\AppData\Local\Temp\svhost.exe
      C:\Users\Admin\AppData\Local\Temp\svhost.exe
      2⤵
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2024
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "NTFS Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmp61B1.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:784
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\FolderName\svhost.bat" "
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:672
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 120
        3⤵
        • Delays execution with timeout.exe
        PID:1832
      • C:\Windows\SysWOW64\tasklist.exe
        tasklist /nh /fi "imagename eq svhost .exe"
        3⤵
        • Enumerates processes with tasklist
        • Suspicious use of AdjustPrivilegeToken
        PID:1656
      • C:\Windows\SysWOW64\find.exe
        find /i "svhost .exe"
        3⤵
          PID:1936
        • C:\Users\Admin\AppData\Local\Temp\FolderName\svhost.exe
          "C:\Users\Admin\AppData\Local\Temp\FolderName\svhost.exe"
          3⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1508
          • C:\Users\Admin\AppData\Local\Temp\svhost.exe
            C:\Users\Admin\AppData\Local\Temp\svhost.exe
            4⤵
            • Executes dropped EXE
            PID:908
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 120
          3⤵
          • Delays execution with timeout.exe
          PID:1992

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Modify Registry

    1
    T1112

    Discovery

    System Information Discovery

    2
    T1082

    Process Discovery

    1
    T1057

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\FolderName\invs.vbs
      Filesize

      78B

      MD5

      c578d9653b22800c3eb6b6a51219bbb8

      SHA1

      a97aa251901bbe179a48dbc7a0c1872e163b1f2d

      SHA256

      20a98a7e6e137bb1b9bd5ef6911a479cb8eac925b80d6db4e70b19f62a40cce2

      SHA512

      3ae6dc8f02d1a78e1235a0782b632972da5a74ab32287cc41aa672d4fa4a9d34bb5fc50eba07b6915f2e61c402927cd5f6feeb7f7602afa2f64e91efb3b7fc4d

    • C:\Users\Admin\AppData\Local\Temp\FolderName\mata.bat
      Filesize

      70B

      MD5

      23f72401196919748c14cb64c1d55c3b

      SHA1

      869e3809cb4391e6f5aee5349a871e40a1e1fb22

      SHA256

      d09c4054568f89c5de2bd9bae9cbcbcb3ef2dda9a9ded0153e29da26dc405d11

      SHA512

      2ab844717c31c4819d8773d7604dfc831e950ae9e38fe311acf8178d46f39fafb54b448ebb6b9cf5d1edd47ed36eae11d649c1be346b0a35d380dd07101c79f1

    • C:\Users\Admin\AppData\Local\Temp\FolderName\mata2.bat
      Filesize

      268B

      MD5

      f25a591c47640fc9f70ecb59b94b30e7

      SHA1

      bc3d792400ac74da18171aa03dd2c41ce034cb56

      SHA256

      9c0e92578feae66ecfb38f45fff7e8fa7f866f83bfadb04718495727c7bc3bb7

      SHA512

      cd8e0aa0856a63cb8e47b94bd4e14efe191e9ab4f63ebdd46b42bbb3bb15d5f4416920af5aced649e5550cb106ce05291c90f7c895a4694e8558e4d81a45449f

    • C:\Users\Admin\AppData\Local\Temp\FolderName\svhost.bat
      Filesize

      211B

      MD5

      0b950c12cf616d009460c837fb8c5d65

      SHA1

      7a2eb9948745d2867520df26ff01a73fe54b8a92

      SHA256

      86abb98a9ab67bd521fbb18abe83936a17c349272846d7e4b99dc52abe7c60f9

      SHA512

      01967af77f8a12fa3bc790674381ff8fbfac28bf18914cca6419f497b15c88a3675814e18d5ce5b90b4993d8c2a8d5f372dbb54f7b31a8e4080db39601fde088

    • C:\Users\Admin\AppData\Local\Temp\FolderName\svhost.bat
      Filesize

      211B

      MD5

      0b950c12cf616d009460c837fb8c5d65

      SHA1

      7a2eb9948745d2867520df26ff01a73fe54b8a92

      SHA256

      86abb98a9ab67bd521fbb18abe83936a17c349272846d7e4b99dc52abe7c60f9

      SHA512

      01967af77f8a12fa3bc790674381ff8fbfac28bf18914cca6419f497b15c88a3675814e18d5ce5b90b4993d8c2a8d5f372dbb54f7b31a8e4080db39601fde088

    • C:\Users\Admin\AppData\Local\Temp\FolderName\svhost.exe
      Filesize

      1.2MB

      MD5

      9ea94e6de35b9dcfacfea2139289617c

      SHA1

      4fa4c36845256a206a61b59b8106aa3f0d7a6b7a

      SHA256

      357fd1a00c2f8dd56bdcff21a3eeb2d37f38b7c1e3dab18dc80d7962569ec97f

      SHA512

      c32ecdae46a9114a6e9dd6f02c092b04f44aca42d19a085cf157d1d1666041aa7c027f1df42b6e35ca1328efefd6951d607447619e89a993153ef0c35170488f

    • C:\Users\Admin\AppData\Local\Temp\FolderName\svhost.exe
      Filesize

      1.2MB

      MD5

      9ea94e6de35b9dcfacfea2139289617c

      SHA1

      4fa4c36845256a206a61b59b8106aa3f0d7a6b7a

      SHA256

      357fd1a00c2f8dd56bdcff21a3eeb2d37f38b7c1e3dab18dc80d7962569ec97f

      SHA512

      c32ecdae46a9114a6e9dd6f02c092b04f44aca42d19a085cf157d1d1666041aa7c027f1df42b6e35ca1328efefd6951d607447619e89a993153ef0c35170488f

    • C:\Users\Admin\AppData\Local\Temp\svhost.exe
      Filesize

      52KB

      MD5

      278edbd499374bf73621f8c1f969d894

      SHA1

      a81170af14747781c5f5f51bb1215893136f0bc0

      SHA256

      c6999b9f79932c3b4f1c461a69d9dc8dc301d6a155abc33efe1b6e9e4a038391

      SHA512

      93b0b5c3324bd2df83310f96d34c9176c94d2d676766599c1af33c98ba1efe63187056671f7c6f80c956e5bd0a725f108804021ad93326286bb9c3a96f6550b9

    • C:\Users\Admin\AppData\Local\Temp\svhost.exe
      Filesize

      52KB

      MD5

      278edbd499374bf73621f8c1f969d894

      SHA1

      a81170af14747781c5f5f51bb1215893136f0bc0

      SHA256

      c6999b9f79932c3b4f1c461a69d9dc8dc301d6a155abc33efe1b6e9e4a038391

      SHA512

      93b0b5c3324bd2df83310f96d34c9176c94d2d676766599c1af33c98ba1efe63187056671f7c6f80c956e5bd0a725f108804021ad93326286bb9c3a96f6550b9

    • C:\Users\Admin\AppData\Local\Temp\svhost.exe
      Filesize

      52KB

      MD5

      278edbd499374bf73621f8c1f969d894

      SHA1

      a81170af14747781c5f5f51bb1215893136f0bc0

      SHA256

      c6999b9f79932c3b4f1c461a69d9dc8dc301d6a155abc33efe1b6e9e4a038391

      SHA512

      93b0b5c3324bd2df83310f96d34c9176c94d2d676766599c1af33c98ba1efe63187056671f7c6f80c956e5bd0a725f108804021ad93326286bb9c3a96f6550b9

    • C:\Users\Admin\AppData\Local\Temp\tmp61B1.tmp
      Filesize

      1KB

      MD5

      24de2170a8dce23ab327cf07c00cd17e

      SHA1

      c759a98d8447e9674d0707da64cd97204720c0ae

      SHA256

      fa98fbb5ddd9fcbcdc76196d8dc524602815d90d244eb43f7f983a829b7d3b3d

      SHA512

      83ea8711513efbd1a4045b27fcd916cab7c9b6ab3e519500db114287b8a42103f44142e1c350f1f7a0bb76d291bfc838834d423338a23a30ff2f15066ff87d2b

    • \Users\Admin\AppData\Local\Temp\FolderName\svhost.exe
      Filesize

      1.2MB

      MD5

      9ea94e6de35b9dcfacfea2139289617c

      SHA1

      4fa4c36845256a206a61b59b8106aa3f0d7a6b7a

      SHA256

      357fd1a00c2f8dd56bdcff21a3eeb2d37f38b7c1e3dab18dc80d7962569ec97f

      SHA512

      c32ecdae46a9114a6e9dd6f02c092b04f44aca42d19a085cf157d1d1666041aa7c027f1df42b6e35ca1328efefd6951d607447619e89a993153ef0c35170488f

    • \Users\Admin\AppData\Local\Temp\FolderName\svhost.exe
      Filesize

      1.2MB

      MD5

      9ea94e6de35b9dcfacfea2139289617c

      SHA1

      4fa4c36845256a206a61b59b8106aa3f0d7a6b7a

      SHA256

      357fd1a00c2f8dd56bdcff21a3eeb2d37f38b7c1e3dab18dc80d7962569ec97f

      SHA512

      c32ecdae46a9114a6e9dd6f02c092b04f44aca42d19a085cf157d1d1666041aa7c027f1df42b6e35ca1328efefd6951d607447619e89a993153ef0c35170488f

    • \Users\Admin\AppData\Local\Temp\svhost.exe
      Filesize

      52KB

      MD5

      278edbd499374bf73621f8c1f969d894

      SHA1

      a81170af14747781c5f5f51bb1215893136f0bc0

      SHA256

      c6999b9f79932c3b4f1c461a69d9dc8dc301d6a155abc33efe1b6e9e4a038391

      SHA512

      93b0b5c3324bd2df83310f96d34c9176c94d2d676766599c1af33c98ba1efe63187056671f7c6f80c956e5bd0a725f108804021ad93326286bb9c3a96f6550b9

    • \Users\Admin\AppData\Local\Temp\svhost.exe
      Filesize

      52KB

      MD5

      278edbd499374bf73621f8c1f969d894

      SHA1

      a81170af14747781c5f5f51bb1215893136f0bc0

      SHA256

      c6999b9f79932c3b4f1c461a69d9dc8dc301d6a155abc33efe1b6e9e4a038391

      SHA512

      93b0b5c3324bd2df83310f96d34c9176c94d2d676766599c1af33c98ba1efe63187056671f7c6f80c956e5bd0a725f108804021ad93326286bb9c3a96f6550b9

    • memory/672-83-0x0000000000000000-mapping.dmp
    • memory/688-79-0x0000000000000000-mapping.dmp
    • memory/784-80-0x0000000000000000-mapping.dmp
    • memory/908-105-0x000000000041E792-mapping.dmp
    • memory/908-112-0x0000000074EE0000-0x000000007548B000-memory.dmp
      Filesize

      5.7MB

    • memory/916-55-0x0000000074EE0000-0x000000007548B000-memory.dmp
      Filesize

      5.7MB

    • memory/916-86-0x0000000074EE0000-0x000000007548B000-memory.dmp
      Filesize

      5.7MB

    • memory/916-54-0x0000000076871000-0x0000000076873000-memory.dmp
      Filesize

      8KB

    • memory/1000-56-0x0000000000000000-mapping.dmp
    • memory/1492-78-0x0000000000000000-mapping.dmp
    • memory/1508-113-0x0000000074EE0000-0x000000007548B000-memory.dmp
      Filesize

      5.7MB

    • memory/1508-93-0x0000000000000000-mapping.dmp
    • memory/1508-96-0x0000000074EE0000-0x000000007548B000-memory.dmp
      Filesize

      5.7MB

    • memory/1656-89-0x0000000000000000-mapping.dmp
    • memory/1832-87-0x0000000000000000-mapping.dmp
    • memory/1936-90-0x0000000000000000-mapping.dmp
    • memory/1992-115-0x0000000000000000-mapping.dmp
    • memory/2008-58-0x0000000000000000-mapping.dmp
    • memory/2024-88-0x0000000074EE0000-0x000000007548B000-memory.dmp
      Filesize

      5.7MB

    • memory/2024-82-0x0000000074EE0000-0x000000007548B000-memory.dmp
      Filesize

      5.7MB

    • memory/2024-74-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/2024-72-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/2024-69-0x000000000041E792-mapping.dmp
    • memory/2024-68-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/2024-65-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/2024-64-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/2024-62-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB

    • memory/2024-60-0x0000000000400000-0x000000000047E000-memory.dmp
      Filesize

      504KB