Analysis

  • max time kernel
    153s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-03-2024 21:21

General

  • Target

    f85da1d5d82a48fb55553792f5f4e6f533bbab6f48cacaec8ba07a9fa311d4b3.exe

  • Size

    2.0MB

  • MD5

    bde3a7994a3c640861dcce48cf0d187c

  • SHA1

    f5dffd346152b803038d3b4e96ac4eb022a6531a

  • SHA256

    f85da1d5d82a48fb55553792f5f4e6f533bbab6f48cacaec8ba07a9fa311d4b3

  • SHA512

    5e8bf0a4dff99aa09af659585f4ee1ca89f47a1669ebd6c5faf4dd3b4d1947a59f373ef3116a031e9cb790b872d2cd1bf1c6e27db14c08a909586982cb2bb98a

  • SSDEEP

    49152:Lz0WsMfQ5vRfPx4a2ANmmzWL5SqG6szWkfhdMQZLmc0:zsKQ5tx4S7K53NszpgcSZ

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.145

Attributes
  • url_path

    /3cd2b41cbde8fc9c.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 4 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 3 IoCs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor 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.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f85da1d5d82a48fb55553792f5f4e6f533bbab6f48cacaec8ba07a9fa311d4b3.exe
    "C:\Users\Admin\AppData\Local\Temp\f85da1d5d82a48fb55553792f5f4e6f533bbab6f48cacaec8ba07a9fa311d4b3.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1344
    • C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
      C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1688
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\IIEBAFCBKF.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3116
        • C:\Users\Admin\AppData\Local\Temp\IIEBAFCBKF.exe
          "C:\Users\Admin\AppData\Local\Temp\IIEBAFCBKF.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1504
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\IIEBAFCBKF.exe
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1096
            • C:\Windows\SysWOW64\PING.EXE
              ping 2.2.2.2 -n 1 -w 3000
              6⤵
              • Runs ping.exe
              PID:264
    • C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
      C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:500
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3924
        • C:\Windows\SysWOW64\chcp.com
          chcp 1251
          4⤵
            PID:4952
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
            4⤵
            • Creates scheduled task(s)
            PID:1096
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=3448 --field-trial-handle=2304,i,6987730730348465820,3913273227385401271,262144 --variations-seed-version /prefetch:3
      1⤵
        PID:1076
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4080 --field-trial-handle=2304,i,6987730730348465820,3913273227385401271,262144 --variations-seed-version /prefetch:8
        1⤵
          PID:1592

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\Are.docx

          Filesize

          11KB

          MD5

          a33e5b189842c5867f46566bdbf7a095

          SHA1

          e1c06359f6a76da90d19e8fd95e79c832edb3196

          SHA256

          5abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454

          SHA512

          f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b

        • C:\ProgramData\mozglue.dll

          Filesize

          593KB

          MD5

          c8fd9be83bc728cc04beffafc2907fe9

          SHA1

          95ab9f701e0024cedfbd312bcfe4e726744c4f2e

          SHA256

          ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

          SHA512

          fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

        • C:\ProgramData\nss3.dll

          Filesize

          2.0MB

          MD5

          1cc453cdf74f31e4d913ff9c10acdde2

          SHA1

          6e85eae544d6e965f15fa5c39700fa7202f3aafe

          SHA256

          ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

          SHA512

          dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

        • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports

          Filesize

          2B

          MD5

          d751713988987e9331980363e24189ce

          SHA1

          97d170e1550eee4afc0af065b78cda302a97674c

          SHA256

          4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

          SHA512

          b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

        • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries

          Filesize

          40B

          MD5

          20d4b8fa017a12a108c87f540836e250

          SHA1

          1ac617fac131262b6d3ce1f52f5907e31d5f6f00

          SHA256

          6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d

          SHA512

          507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

        • C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe

          Filesize

          1.7MB

          MD5

          eee5ddcffbed16222cac0a1b4e2e466e

          SHA1

          28b40c88b8ea50b0782e2bcbb4cc0f411035f3d5

          SHA256

          2a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54

          SHA512

          8f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc

        • C:\Users\Admin\AppData\Local\Temp\IIEBAFCBKF.exe

          Filesize

          101KB

          MD5

          42b838cf8bdf67400525e128d917f6e0

          SHA1

          a578f6faec738912dba8c41e7abe1502c46d0cae

          SHA256

          0e4ffba62ce9a464aa1b7ff9f1e55ace8f51ff1e15102d856f801a81f8b4607d

          SHA512

          f64b39d885375251ab7db72c57dc5b5095f0c6412169f1035d1f6a25b8415a2a01004d06bfa0267cf683ef7dea7a9f969ad43fde5a4376f1fcb65a57403433c0

        • C:\Users\Admin\AppData\Local\Temp\nstD6B.tmp\INetC.dll

          Filesize

          21KB

          MD5

          2b342079303895c50af8040a91f30f71

          SHA1

          b11335e1cb8356d9c337cb89fe81d669a69de17e

          SHA256

          2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

          SHA512

          550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

        • C:\Users\Admin\AppData\Local\Temp\syncUpd.exe

          Filesize

          200KB

          MD5

          c722591f624fb69970f246b8c81d830f

          SHA1

          85516decea5d6987bebe39cbadf36053beaf4bb0

          SHA256

          13cd1152a19fdac6581cac2bd822f34bd3026ea1783ff231e299b6d28c046a6a

          SHA512

          822584c5c8a0813af4d845e80919776c71a43464ab719d1c303ebaae6a8ed47763183566bedc9be2e8c44de8ee6fd62d1e12be471e5d5c73ae4b1dcdaa34a908

        • C:\Users\Admin\AppData\Roaming\Temp\Task.bat

          Filesize

          128B

          MD5

          11bb3db51f701d4e42d3287f71a6a43e

          SHA1

          63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

          SHA256

          6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

          SHA512

          907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

        • memory/500-23-0x0000000000400000-0x0000000000930000-memory.dmp

          Filesize

          5.2MB

        • memory/500-28-0x0000000000F40000-0x0000000000F41000-memory.dmp

          Filesize

          4KB

        • memory/500-117-0x0000000000F40000-0x0000000000F41000-memory.dmp

          Filesize

          4KB

        • memory/500-81-0x0000000000400000-0x0000000000930000-memory.dmp

          Filesize

          5.2MB

        • memory/1344-27-0x0000000000400000-0x000000000043D000-memory.dmp

          Filesize

          244KB

        • memory/1504-138-0x00000000732D0000-0x0000000073A80000-memory.dmp

          Filesize

          7.7MB

        • memory/1504-146-0x0000000004E30000-0x0000000004E40000-memory.dmp

          Filesize

          64KB

        • memory/1504-144-0x00000000732D0000-0x0000000073A80000-memory.dmp

          Filesize

          7.7MB

        • memory/1504-141-0x0000000004E30000-0x0000000004E40000-memory.dmp

          Filesize

          64KB

        • memory/1504-139-0x0000000000230000-0x000000000024E000-memory.dmp

          Filesize

          120KB

        • memory/1688-29-0x0000000061E00000-0x0000000061EF3000-memory.dmp

          Filesize

          972KB

        • memory/1688-25-0x00000000007B0000-0x00000000007D7000-memory.dmp

          Filesize

          156KB

        • memory/1688-134-0x0000000000400000-0x000000000063B000-memory.dmp

          Filesize

          2.2MB

        • memory/1688-24-0x00000000008E0000-0x00000000009E0000-memory.dmp

          Filesize

          1024KB

        • memory/1688-26-0x0000000000400000-0x000000000063B000-memory.dmp

          Filesize

          2.2MB

        • memory/1688-116-0x0000000000400000-0x000000000063B000-memory.dmp

          Filesize

          2.2MB

        • memory/1688-88-0x0000000000400000-0x000000000063B000-memory.dmp

          Filesize

          2.2MB

        • memory/1688-58-0x0000000000400000-0x000000000063B000-memory.dmp

          Filesize

          2.2MB

        • memory/1688-94-0x00000000008E0000-0x00000000009E0000-memory.dmp

          Filesize

          1024KB