Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29-12-2020 07:47

General

  • Target

    2f6bac544fe67b6190c962a78b0fc82a.exe

  • Size

    137KB

  • MD5

    2f6bac544fe67b6190c962a78b0fc82a

  • SHA1

    05c582deb76f170c3d4e3d749e7bcd931ea61bbd

  • SHA256

    5f0ed96dd82e54969f74392ab82759116ee18a2232f44b3cf9754b216d83e2a2

  • SHA512

    ef6ddcc78da2ac6c89631a3e9249a415a17d567359c23b209b073d297c371918b36df8dc3a9eaaefd23dbe65d90afb639b5ea48187c46511c4e58996363ab5b9

Malware Config

Extracted

Family

smokeloader

Version

2020

C2

http://vtdilet.com/upload/

http://netvxi.com/upload/

http://tinnys.monster/upload/

rc4.i32
rc4.i32

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Raccoon

    Simple but powerful infostealer which was very active in 2019.

  • RedLine

    RedLine Stealer is a malware family written in C#, first appearing in early 2020.

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • AgentTesla Payload 2 IoCs
  • Executes dropped EXE 3 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 8 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • JavaScript code in executable 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • 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
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2628 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 15 IoCs
  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2f6bac544fe67b6190c962a78b0fc82a.exe
    "C:\Users\Admin\AppData\Local\Temp\2f6bac544fe67b6190c962a78b0fc82a.exe"
    1⤵
    • Loads dropped DLL
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    PID:3980
  • C:\Users\Admin\AppData\Local\Temp\8C67.exe
    C:\Users\Admin\AppData\Local\Temp\8C67.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:1608
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C reg add "HKEY_CURRENT_USER\Software\NetHelper" /v path /t REG_SZ /d C:\ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:744
      • C:\Windows\SysWOW64\reg.exe
        reg add "HKEY_CURRENT_USER\Software\NetHelper" /v path /t REG_SZ /d C:\ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo /f
        3⤵
          PID:3252
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C timeout /t 60 && SCHTASKS /Create /SC MINUTE /MO 1 /TN "Service for windows Network Helper updates" /TR C:\ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo\$Önethelper.exe /F
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3372
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 60
          3⤵
          • Delays execution with timeout.exe
          PID:2136
        • C:\Windows\SysWOW64\schtasks.exe
          SCHTASKS /Create /SC MINUTE /MO 1 /TN "Service for windows Network Helper updates" /TR C:\ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo\$Önethelper.exe /F
          3⤵
          • Creates scheduled task(s)
          PID:3836
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C reg add "HKEY_CURRENT_USER\Software\NetHelper" /v library /t REG_SZ /d C:\ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo\nethelper.dll /f && EXIT 0
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4004
        • C:\Windows\SysWOW64\reg.exe
          reg add "HKEY_CURRENT_USER\Software\NetHelper" /v library /t REG_SZ /d C:\ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo\nethelper.dll /f
          3⤵
            PID:2468
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /C rundll32.exe C:\ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo\nethelper.dll, UserModeExport
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3928
          • C:\Windows\SysWOW64\rundll32.exe
            rundll32.exe C:\ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo\nethelper.dll, UserModeExport
            3⤵
            • Loads dropped DLL
            PID:2784
      • C:\Users\Admin\AppData\Local\Temp\EE7D.exe
        C:\Users\Admin\AppData\Local\Temp\EE7D.exe
        1⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:3784
        • C:\Windows\SysWOW64\cmd.exe
          cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\EE7D.exe"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1572
          • C:\Windows\SysWOW64\timeout.exe
            timeout /T 10 /NOBREAK
            3⤵
            • Delays execution with timeout.exe
            PID:3808
      • C:\Users\Admin\AppData\Local\Temp\45E5.exe
        C:\Users\Admin\AppData\Local\Temp\45E5.exe
        1⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3156
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C ping 127.0.0.1 -n 3 > nul & del ""
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3844
          • C:\Windows\SysWOW64\PING.EXE
            ping 127.0.0.1 -n 3
            3⤵
            • Runs ping.exe
            PID:2768

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Execution

      Scheduled Task

      1
      T1053

      Persistence

      Scheduled Task

      1
      T1053

      Privilege Escalation

      Scheduled Task

      1
      T1053

      Credential Access

      Credentials in Files

      2
      T1081

      Discovery

      Query Registry

      2
      T1012

      Peripheral Device Discovery

      1
      T1120

      System Information Discovery

      1
      T1082

      Remote System Discovery

      1
      T1018

      Collection

      Data from Local System

      2
      T1005

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo\nethelper.dll
        MD5

        e835f27f6b6a2b0af42873ce2cc6cc07

        SHA1

        6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

        SHA256

        84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

        SHA512

        c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

      • C:\Users\Admin\AppData\Local\Temp\45E5.exe
        MD5

        fb99f6eb31eb045696538b7bb36c9d01

        SHA1

        39a87a966748142012debae43457b641a9888b30

        SHA256

        ec2019f784a07f43b27c4a0f6161c6bac08023ae2d71e5c0bdf4ba44c7dd8b94

        SHA512

        30496fcac7edf3a7e9c87ed1614459bb6a1490cdcdcbd7b85881a00f289cc9480a55e39b6f31a4fa88d805d9c899255e14dffd98f210bbc90268a40b3d8e6d54

      • C:\Users\Admin\AppData\Local\Temp\45E5.exe
        MD5

        fb99f6eb31eb045696538b7bb36c9d01

        SHA1

        39a87a966748142012debae43457b641a9888b30

        SHA256

        ec2019f784a07f43b27c4a0f6161c6bac08023ae2d71e5c0bdf4ba44c7dd8b94

        SHA512

        30496fcac7edf3a7e9c87ed1614459bb6a1490cdcdcbd7b85881a00f289cc9480a55e39b6f31a4fa88d805d9c899255e14dffd98f210bbc90268a40b3d8e6d54

      • C:\Users\Admin\AppData\Local\Temp\8C67.exe
        MD5

        57a9c6d1f80eec2792d26d5903a9228b

        SHA1

        15455de7cb21d125651d9cf88b23af2953bfa96f

        SHA256

        b33cc87f7974c98429bcf0396527bb81c97bb11eb143257e9e1196d685949120

        SHA512

        0f1b1e42bba286c6b5d08571c97d770c287eff5249acef52809640a0e55a67711331e5adaaa6dae89ea16e817f29fd59da2bf0ff66864f53279cb834f112a280

      • C:\Users\Admin\AppData\Local\Temp\8C67.exe
        MD5

        57a9c6d1f80eec2792d26d5903a9228b

        SHA1

        15455de7cb21d125651d9cf88b23af2953bfa96f

        SHA256

        b33cc87f7974c98429bcf0396527bb81c97bb11eb143257e9e1196d685949120

        SHA512

        0f1b1e42bba286c6b5d08571c97d770c287eff5249acef52809640a0e55a67711331e5adaaa6dae89ea16e817f29fd59da2bf0ff66864f53279cb834f112a280

      • C:\Users\Admin\AppData\Local\Temp\EE7D.exe
        MD5

        3c362d50ee8dda5655d201c1892e6ac2

        SHA1

        c61e83407acab961d7094b5f20c89501d4d94651

        SHA256

        ce8f6248e942286fa329f634581603ceea496cd968df33c7241745b41faac6ae

        SHA512

        274372ddf532c76fd23b2122d9ac108525289da3153d03dbb23373ca4b350eaa2f7e7241948e79e39ad146afc529a87048b702765e39a04691253c6bd5c360ae

      • C:\Users\Admin\AppData\Local\Temp\EE7D.exe
        MD5

        3c362d50ee8dda5655d201c1892e6ac2

        SHA1

        c61e83407acab961d7094b5f20c89501d4d94651

        SHA256

        ce8f6248e942286fa329f634581603ceea496cd968df33c7241745b41faac6ae

        SHA512

        274372ddf532c76fd23b2122d9ac108525289da3153d03dbb23373ca4b350eaa2f7e7241948e79e39ad146afc529a87048b702765e39a04691253c6bd5c360ae

      • \ProgramData\NetHelper\Cache\SDxFTUgvArWFfIzqVMbo\nethelper.dll
        MD5

        e835f27f6b6a2b0af42873ce2cc6cc07

        SHA1

        6f0d337dff455f08f29f20a75dd5f2de2d9ae19a

        SHA256

        84762c5267b583916431e0a1170809b4f366d54fd0d48aea4f07256f10984f84

        SHA512

        c6d079fc59aed72ec45008d48130210a450dc50722ebb3d577ffd7c47f2633a5e11fbea95773a26384bf8ca20da46013731530fbb5c13598b96012cf910ab984

      • \Users\Admin\AppData\LocalLow\pF2qC1gG7yH8hI1o\freebl3.dll
        MD5

        60acd24430204ad2dc7f148b8cfe9bdc

        SHA1

        989f377b9117d7cb21cbe92a4117f88f9c7693d9

        SHA256

        9876c53134dbbec4dcca67581f53638eba3fea3a15491aa3cf2526b71032da97

        SHA512

        626c36e9567f57fa8ec9c36d96cbadede9c6f6734a7305ecfb9f798952bbacdfa33a1b6c4999ba5b78897dc2ec6f91870f7ec25b2ceacbaee4be942fe881db01

      • \Users\Admin\AppData\LocalLow\pF2qC1gG7yH8hI1o\freebl3.dll
        MD5

        60acd24430204ad2dc7f148b8cfe9bdc

        SHA1

        989f377b9117d7cb21cbe92a4117f88f9c7693d9

        SHA256

        9876c53134dbbec4dcca67581f53638eba3fea3a15491aa3cf2526b71032da97

        SHA512

        626c36e9567f57fa8ec9c36d96cbadede9c6f6734a7305ecfb9f798952bbacdfa33a1b6c4999ba5b78897dc2ec6f91870f7ec25b2ceacbaee4be942fe881db01

      • \Users\Admin\AppData\LocalLow\pF2qC1gG7yH8hI1o\mozglue.dll
        MD5

        eae9273f8cdcf9321c6c37c244773139

        SHA1

        8378e2a2f3635574c106eea8419b5eb00b8489b0

        SHA256

        a0c6630d4012ae0311ff40f4f06911bcf1a23f7a4762ce219b8dffa012d188cc

        SHA512

        06e43e484a89cea9ba9b9519828d38e7c64b040f44cdaeb321cbda574e7551b11fea139ce3538f387a0a39a3d8c4cba7f4cf03e4a3c98db85f8121c2212a9097

      • \Users\Admin\AppData\LocalLow\pF2qC1gG7yH8hI1o\nss3.dll
        MD5

        02cc7b8ee30056d5912de54f1bdfc219

        SHA1

        a6923da95705fb81e368ae48f93d28522ef552fb

        SHA256

        1989526553fd1e1e49b0fea8036822ca062d3d39c4cab4a37846173d0f1753d5

        SHA512

        0d5dfcf4fb19b27246fa799e339d67cd1b494427783f379267fb2d10d615ffb734711bab2c515062c078f990a44a36f2d15859b1dacd4143dcc35b5c0cee0ef5

      • \Users\Admin\AppData\LocalLow\pF2qC1gG7yH8hI1o\softokn3.dll
        MD5

        4e8df049f3459fa94ab6ad387f3561ac

        SHA1

        06ed392bc29ad9d5fc05ee254c2625fd65925114

        SHA256

        25a4dae37120426ab060ebb39b7030b3e7c1093cc34b0877f223b6843b651871

        SHA512

        3dd4a86f83465989b2b30c240a7307edd1b92d5c1d5c57d47eff287dc9daa7bace157017908d82e00be90f08ff5badb68019ffc9d881440229dcea5038f61cd6

      • \Users\Admin\AppData\LocalLow\sqlite3.dll
        MD5

        f964811b68f9f1487c2b41e1aef576ce

        SHA1

        b423959793f14b1416bc3b7051bed58a1034025f

        SHA256

        83bc57dcf282264f2b00c21ce0339eac20fcb7401f7c5472c0cd0c014844e5f7

        SHA512

        565b1a7291c6fcb63205907fcd9e72fc2e11ca945afc4468c378edba882e2f314c2ac21a7263880ff7d4b84c2a1678024c1ac9971ac1c1de2bfa4248ec0f98c4

      • \Users\Admin\AppData\Local\Temp\CC4F.tmp
        MD5

        50741b3f2d7debf5d2bed63d88404029

        SHA1

        56210388a627b926162b36967045be06ffb1aad3

        SHA256

        f2f8732ae464738372ff274b7e481366cecdd2337210d4a3cbcd089c958a730c

        SHA512

        fac6bfe35b1ee08b3d42d330516a260d9cdb4a90bbb0491411a583029b92a59d20af3552372ea8fb3f59442b3945bf524ef284127f397ae7179467080be8e9b3

      • memory/744-11-0x0000000000000000-mapping.dmp
      • memory/1572-32-0x0000000000000000-mapping.dmp
      • memory/1608-9-0x0000000005026000-0x0000000005027000-memory.dmp
        Filesize

        4KB

      • memory/1608-6-0x0000000000000000-mapping.dmp
      • memory/1608-10-0x0000000005420000-0x0000000005421000-memory.dmp
        Filesize

        4KB

      • memory/2136-14-0x0000000000000000-mapping.dmp
      • memory/2468-17-0x0000000000000000-mapping.dmp
      • memory/2768-58-0x0000000000000000-mapping.dmp
      • memory/2784-18-0x0000000000000000-mapping.dmp
      • memory/3020-5-0x0000000000A40000-0x0000000000A56000-memory.dmp
        Filesize

        88KB

      • memory/3156-44-0x0000000009A00000-0x0000000009A01000-memory.dmp
        Filesize

        4KB

      • memory/3156-38-0x0000000005290000-0x0000000005291000-memory.dmp
        Filesize

        4KB

      • memory/3156-56-0x000000000CBD0000-0x000000000CBD1000-memory.dmp
        Filesize

        4KB

      • memory/3156-55-0x000000000CB80000-0x000000000CB81000-memory.dmp
        Filesize

        4KB

      • memory/3156-54-0x000000000BA90000-0x000000000BA91000-memory.dmp
        Filesize

        4KB

      • memory/3156-53-0x000000000B720000-0x000000000B721000-memory.dmp
        Filesize

        4KB

      • memory/3156-52-0x000000000B690000-0x000000000B691000-memory.dmp
        Filesize

        4KB

      • memory/3156-34-0x0000000000000000-mapping.dmp
      • memory/3156-48-0x000000000A0F0000-0x000000000A0F1000-memory.dmp
        Filesize

        4KB

      • memory/3156-51-0x000000000B5D0000-0x000000000B5D1000-memory.dmp
        Filesize

        4KB

      • memory/3156-37-0x0000000005036000-0x0000000005037000-memory.dmp
        Filesize

        4KB

      • memory/3156-49-0x000000000ADE0000-0x000000000ADE1000-memory.dmp
        Filesize

        4KB

      • memory/3156-39-0x0000000006D90000-0x0000000006D91000-memory.dmp
        Filesize

        4KB

      • memory/3156-40-0x00000000721A0000-0x000000007288E000-memory.dmp
        Filesize

        6.9MB

      • memory/3156-41-0x0000000006D00000-0x0000000006D23000-memory.dmp
        Filesize

        140KB

      • memory/3156-42-0x0000000009500000-0x0000000009501000-memory.dmp
        Filesize

        4KB

      • memory/3156-43-0x0000000006EA0000-0x0000000006EC2000-memory.dmp
        Filesize

        136KB

      • memory/3156-50-0x000000000AFB0000-0x000000000AFB1000-memory.dmp
        Filesize

        4KB

      • memory/3156-45-0x00000000093C0000-0x00000000093C1000-memory.dmp
        Filesize

        4KB

      • memory/3156-46-0x0000000009400000-0x0000000009401000-memory.dmp
        Filesize

        4KB

      • memory/3156-47-0x0000000009450000-0x0000000009451000-memory.dmp
        Filesize

        4KB

      • memory/3252-13-0x0000000000000000-mapping.dmp
      • memory/3372-12-0x0000000000000000-mapping.dmp
      • memory/3784-25-0x0000000005320000-0x0000000005321000-memory.dmp
        Filesize

        4KB

      • memory/3784-21-0x0000000000000000-mapping.dmp
      • memory/3784-24-0x0000000005036000-0x0000000005037000-memory.dmp
        Filesize

        4KB

      • memory/3808-33-0x0000000000000000-mapping.dmp
      • memory/3836-59-0x0000000000000000-mapping.dmp
      • memory/3844-57-0x0000000000000000-mapping.dmp
      • memory/3928-16-0x0000000000000000-mapping.dmp
      • memory/3980-2-0x0000000004DB6000-0x0000000004DB7000-memory.dmp
        Filesize

        4KB

      • memory/3980-3-0x00000000053B0000-0x00000000053B1000-memory.dmp
        Filesize

        4KB

      • memory/4004-15-0x0000000000000000-mapping.dmp