Analysis

  • max time kernel
    129s
  • max time network
    132s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    16-05-2024 08:00

General

  • Target

    9a852750d155a30729eb21b36edad15f585aef49ef9877575f44e71b7137b4f9.exe

  • Size

    366KB

  • MD5

    262becfd40cd92429a55b4d109ed64e2

  • SHA1

    e5d031cf99aae1625814154b0608551faf726514

  • SHA256

    9a852750d155a30729eb21b36edad15f585aef49ef9877575f44e71b7137b4f9

  • SHA512

    03de152a70f0de411b3ba18a062aba31df5ef996263104849b88ebccc67c15f31be345ea57baa4b8121bb306d3916f8e8a0c06c4d4df4c0d4e656e02988ac13a

  • SSDEEP

    6144:LT7vKU2KcMeiL0DDzlAy63Ha8ZrGhVVHS8ggReNEOJCongzciV3zW7bfhcP:7vKMheiL0nzlIHa1y5FaoRijOjhcP

Malware Config

Extracted

Family

stealc

Botnet

default100

C2

http://185.172.128.150

Attributes
  • url_path

    /c698e1bc8a2f5e6d.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 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.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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).

  • Program crash 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 7 IoCs
  • Suspicious use of SendNotifyMessage 7 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a852750d155a30729eb21b36edad15f585aef49ef9877575f44e71b7137b4f9.exe
    "C:\Users\Admin\AppData\Local\Temp\9a852750d155a30729eb21b36edad15f585aef49ef9877575f44e71b7137b4f9.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2360
    • C:\Users\Admin\AppData\Local\Temp\u1tk.0.exe
      "C:\Users\Admin\AppData\Local\Temp\u1tk.0.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4464
    • C:\Users\Admin\AppData\Local\Temp\u1tk.1.exe
      "C:\Users\Admin\AppData\Local\Temp\u1tk.1.exe"
      2⤵
      • Executes dropped EXE
      • Checks SCSI registry key(s)
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:836
      • C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
        "C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe" /eieci=11A12794-499E-4FA0-A281-A9A9AA8B2685 /eipi=5488CB36-BE62-4606-B07B-2EE938868BD1
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4620
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2360 -s 1608
      2⤵
      • Program crash
      PID:2748
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 2360 -ip 2360
    1⤵
      PID:408

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    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\Temp\u1tk.0.exe

      Filesize

      239KB

      MD5

      431c601846123a7b4aa67d75e31a3dfd

      SHA1

      0704a6551c01b3b5744e7b743b33ffa5be2b4ced

      SHA256

      0a9eab89753e07a01b1c5e0197acefea9cc05e5f7829823f811e7aa1d7b817b7

      SHA512

      87a0f6eb99baf620b25216ba491f4891154224ad44ecbbe209c5189585d4cc8abea25ef7b34d78608f074c00ce76374fe49252d76b693521363aced52e4cda27

    • C:\Users\Admin\AppData\Local\Temp\u1tk.1.exe

      Filesize

      4.6MB

      MD5

      397926927bca55be4a77839b1c44de6e

      SHA1

      e10f3434ef3021c399dbba047832f02b3c898dbd

      SHA256

      4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

      SHA512

      cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

    • memory/836-140-0x0000000000400000-0x00000000008AD000-memory.dmp

      Filesize

      4.7MB

    • memory/836-128-0x0000000000400000-0x00000000008AD000-memory.dmp

      Filesize

      4.7MB

    • memory/2360-72-0x00000000024D0000-0x000000000253C000-memory.dmp

      Filesize

      432KB

    • memory/2360-1-0x0000000000910000-0x0000000000A10000-memory.dmp

      Filesize

      1024KB

    • memory/2360-73-0x0000000000400000-0x000000000046F000-memory.dmp

      Filesize

      444KB

    • memory/2360-71-0x0000000000400000-0x00000000007B2000-memory.dmp

      Filesize

      3.7MB

    • memory/2360-3-0x0000000000400000-0x000000000046F000-memory.dmp

      Filesize

      444KB

    • memory/2360-2-0x00000000024D0000-0x000000000253C000-memory.dmp

      Filesize

      432KB

    • memory/4464-15-0x0000000061E00000-0x0000000061EF3000-memory.dmp

      Filesize

      972KB

    • memory/4464-14-0x0000000000400000-0x0000000000793000-memory.dmp

      Filesize

      3.6MB

    • memory/4464-13-0x0000000000400000-0x0000000000793000-memory.dmp

      Filesize

      3.6MB

    • memory/4464-112-0x0000000000400000-0x0000000000793000-memory.dmp

      Filesize

      3.6MB

    • memory/4620-144-0x0000021F19C70000-0x0000021F19C7C000-memory.dmp

      Filesize

      48KB

    • memory/4620-152-0x0000021F19C40000-0x0000021F19C4A000-memory.dmp

      Filesize

      40KB

    • memory/4620-143-0x0000021F19BF0000-0x0000021F19C00000-memory.dmp

      Filesize

      64KB

    • memory/4620-141-0x0000021F14730000-0x0000021F17F64000-memory.dmp

      Filesize

      56.2MB

    • memory/4620-145-0x0000021F19C60000-0x0000021F19C74000-memory.dmp

      Filesize

      80KB

    • memory/4620-146-0x0000021F19C90000-0x0000021F19CB4000-memory.dmp

      Filesize

      144KB

    • memory/4620-148-0x0000021F32990000-0x0000021F329BA000-memory.dmp

      Filesize

      168KB

    • memory/4620-147-0x0000021F19CD0000-0x0000021F19CDA000-memory.dmp

      Filesize

      40KB

    • memory/4620-149-0x0000021F329C0000-0x0000021F32A72000-memory.dmp

      Filesize

      712KB

    • memory/4620-150-0x0000021F32AC0000-0x0000021F32B10000-memory.dmp

      Filesize

      320KB

    • memory/4620-151-0x0000021F32B10000-0x0000021F32B32000-memory.dmp

      Filesize

      136KB

    • memory/4620-142-0x0000021F326E0000-0x0000021F327EA000-memory.dmp

      Filesize

      1.0MB

    • memory/4620-156-0x0000021F32B40000-0x0000021F32E40000-memory.dmp

      Filesize

      3.0MB

    • memory/4620-158-0x0000021F36810000-0x0000021F36818000-memory.dmp

      Filesize

      32KB

    • memory/4620-159-0x0000021F36F10000-0x0000021F36F48000-memory.dmp

      Filesize

      224KB

    • memory/4620-160-0x0000021F36EE0000-0x0000021F36EEE000-memory.dmp

      Filesize

      56KB

    • memory/4620-161-0x0000021F36F00000-0x0000021F36F08000-memory.dmp

      Filesize

      32KB

    • memory/4620-162-0x0000021F37830000-0x0000021F3783A000-memory.dmp

      Filesize

      40KB

    • memory/4620-163-0x0000021F37850000-0x0000021F378B2000-memory.dmp

      Filesize

      392KB

    • memory/4620-164-0x0000021F378B0000-0x0000021F378D2000-memory.dmp

      Filesize

      136KB

    • memory/4620-165-0x0000021F37E00000-0x0000021F38328000-memory.dmp

      Filesize

      5.2MB

    • memory/4620-168-0x0000021F375B0000-0x0000021F375BC000-memory.dmp

      Filesize

      48KB

    • memory/4620-169-0x0000021F37690000-0x0000021F37706000-memory.dmp

      Filesize

      472KB

    • memory/4620-170-0x0000021F375F0000-0x0000021F3760E000-memory.dmp

      Filesize

      120KB