Analysis

  • max time kernel
    116s
  • max time network
    120s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-01-2025 15:35

General

  • Target

    b37f313c1168b3e79e800d26a9165d7286d7df35be6f8b46bf59ff38206ea2baN.exe

  • Size

    218KB

  • MD5

    ff504e1bf3cadc8f2d986c0b8f80a830

  • SHA1

    40dfef354419c99fc509b90e3bbaf402a013b700

  • SHA256

    b37f313c1168b3e79e800d26a9165d7286d7df35be6f8b46bf59ff38206ea2ba

  • SHA512

    84a0d59de5513f03d5e5c7e8355de57b3d77531681c6aed8ae3b8a9377dfd1136e314ff043b77f6014fdf144198945db6503ab13b02e5506dd1847c9aab7a0d9

  • SSDEEP

    3072:xvm4SZsQrNzPrl6rjGMjp39d4u8iqddCxMIJOb2o5DsBPjim6hwM2H6:11SyAJp6rjn1gOObn4b6h9h

Malware Config

Extracted

Family

simda

Attributes
  • dga

    gatyfus.com

    lyvyxor.com

    vojyqem.com

    qetyfuv.com

    puvyxil.com

    gahyqah.com

    lyryfyd.com

    vocyzit.com

    qegyqaq.com

    purydyv.com

    gacyzuz.com

    lygymoj.com

    vowydef.com

    qexylup.com

    pufymoq.com

    gaqydeb.com

    lyxylux.com

    vofymik.com

    qeqysag.com

    puzylyp.com

    gadyniw.com

    lymysan.com

    volykyc.com

    qedynul.com

    pumypog.com

    galykes.com

    lysynur.com

    vonypom.com

    qekykev.com

    pupybul.com

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Simda family
  • simda

    Simda is an infostealer written in C++.

  • Executes dropped EXE 1 IoCs
  • Modifies WinLogon 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b37f313c1168b3e79e800d26a9165d7286d7df35be6f8b46bf59ff38206ea2baN.exe
    "C:\Users\Admin\AppData\Local\Temp\b37f313c1168b3e79e800d26a9165d7286d7df35be6f8b46bf59ff38206ea2baN.exe"
    1⤵
    • Modifies WinLogon
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: RenamesItself
    • Suspicious use of WriteProcessMemory
    PID:2716
    • C:\Windows\apppatch\svchost.exe
      "C:\Windows\apppatch\svchost.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Modifies WinLogon
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:2312

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\H6N4U6J0\login[1].htm

    Filesize

    168B

    MD5

    d57e3a550060f85d44a175139ea23021

    SHA1

    2c5cb3428a322c9709a34d04dd86fe7628f8f0a6

    SHA256

    43edf068d34276e8ade4113d4d7207de19fc98a2ae1c07298e593edae2a8774c

    SHA512

    0364fe6a010fce7a3f4a6344c84468c64b20fd131f3160fc649db78f1075ba52d8a1c4496e50dbe27c357e01ee52e94cdcda8f7927cba28d5f2f45b9da690063

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\H6N4U6J0\login[4].htm

    Filesize

    162B

    MD5

    4f8e702cc244ec5d4de32740c0ecbd97

    SHA1

    3adb1f02d5b6054de0046e367c1d687b6cdf7aff

    SHA256

    9e17cb15dd75bbbd5dbb984eda674863c3b10ab72613cf8a39a00c3e11a8492a

    SHA512

    21047fea5269fee75a2a187aa09316519e35068cb2f2f76cfaf371e5224445e9d5c98497bd76fb9608d2b73e9dac1a3f5bfadfdc4623c479d53ecf93d81d3c9f

  • C:\Users\Admin\AppData\Local\Temp\17ED.tmp

    Filesize

    12KB

    MD5

    caa300673c11a7627a7b6346e1a93b61

    SHA1

    7ecaf36f1e150c478b6cfc3446ec7f0c662c071a

    SHA256

    42ae110a0ecd0d83c4f12314d42a585354b501856dc3c7b483123fcbc317f2aa

    SHA512

    f11f1182d2fdc14b2c64e2221091e318f76c9a41824977c1a93bf2077300bba919ca4a01c80340c4c20d239ac6dbadf091f544891f0ec72df62a6cc11231faa6

  • C:\Users\Admin\AppData\Local\Temp\39D8.tmp

    Filesize

    2KB

    MD5

    017a221b726768db585fa4b648be433e

    SHA1

    3804bc9b6bd1079c409d3ac6daafb46e0ae3ac1d

    SHA256

    74bc1f610a0025fd7ecf539074ef38c4822047fa7ada427a3a26f730a66ae9ee

    SHA512

    2148a0a90ad7b31cc21291e9332cdd3d4e3de7b422ed29b556e3d1ec8ed9198c8a0198aa81e3de5f37b293f5632765f0d9609dd675d59e07406ebf29e7d693eb

  • C:\Users\Admin\AppData\Local\Temp\39EA.tmp

    Filesize

    61KB

    MD5

    3cfbabca726bfd09355e40e4bdf77174

    SHA1

    d47997b51518e366a4e4dd4a03ece070210dd705

    SHA256

    2f8225295cdf694ed9fd1a15e11c1f6fc911c2cbf4d7bd71b0420a6c7b2b051d

    SHA512

    dce4383abab913f2a7c68647bb9cbcef04c4d7fa31797b3d6888f1fcf03eeabfeb8730c4c8e5b614cbb555d21d27c54cb84d55f2e586fd44f3f7c6e2a60c6d84

  • C:\Users\Admin\AppData\Local\Temp\53FB.tmp

    Filesize

    593B

    MD5

    3b03d93d3487806337b5c6443ce7a62d

    SHA1

    93a7a790bb6348606cbdaf5daeaaf4ea8cf731d0

    SHA256

    7392749832c70fcfc2d440d7afc2f880000dd564930d95d634eb1199fa15de30

    SHA512

    770977beaeedafc5c98d0c32edc8c6c850f05e9f363bc9997fa73991646b02e5d40ceed0017b06caeab0db86423844bc4b0a9f0df2d8239230e423a7bfbd4a88

  • C:\Users\Admin\AppData\Local\Temp\53FB.tmp

    Filesize

    593B

    MD5

    926512864979bc27cf187f1de3f57aff

    SHA1

    acdeb9d6187932613c7fa08eaf28f0cd8116f4b5

    SHA256

    b3e893a653ec06c05ee90f2f6e98cc052a92f6616d7cca8c416420e178dcc73f

    SHA512

    f6f9fd3ca9305bec879cfcd38e64111a18e65e30d25c49e9f2cd546cbab9b2dcd03eca81952f6b77c0eaab20192ef7bef0d8d434f6f371811929e75f8620633b

  • C:\Users\Admin\AppData\Local\Temp\615C.tmp

    Filesize

    61KB

    MD5

    6603c110e2bd4909739a069d4fa1d2ab

    SHA1

    6f695019ce0dbcb30682112b2671a1e8671ead36

    SHA256

    9bdd7216307dde86b5e672d5f1db9c47728e2211d0c7fb6ff8cd2c196e312ba5

    SHA512

    681dafeba08e87c68270ed42453f5a2465705436fb76923050821a1f5d6f5fd08def09289d1e36629680ae716b57a8cf5a41db251e47b1787e299e958bee2ac6

  • C:\Windows\apppatch\svchost.exe

    Filesize

    218KB

    MD5

    5b47a2a5a6d4506d4fe22eeec171f028

    SHA1

    36ad7302dbd85a1cf4a2c207a0305a551eb65552

    SHA256

    6aa6eb603c4a8bfedc3df0728a6394ff2f4aebbc625a810a5fd29060f4fd4d2c

    SHA512

    ee773b163f743e85f10a618bd81008365ab0314daf635635d7dd556c6399e19e8bd10094b85f99382e7baeb71b236571adfb455b7dd5afe02404b576a3564b46

  • memory/2312-50-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-43-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-77-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-79-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-78-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-76-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-75-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-74-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-73-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-72-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-71-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-70-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-69-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-67-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-66-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-65-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-64-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-63-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-62-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-61-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-60-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-59-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-58-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-57-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-55-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-54-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-53-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-52-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-51-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-18-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-49-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-47-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-46-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-45-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-44-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-68-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-42-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-40-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-39-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-38-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-37-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-36-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-35-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-34-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-33-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-32-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-31-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-30-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-26-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-28-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-27-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-25-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-24-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-56-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-48-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-41-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-29-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-23-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-20-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-22-0x0000000002D00000-0x0000000002DB6000-memory.dmp

    Filesize

    728KB

  • memory/2312-12-0x0000000000400000-0x00000000005AE000-memory.dmp

    Filesize

    1.7MB

  • memory/2312-15-0x0000000000400000-0x00000000005AE000-memory.dmp

    Filesize

    1.7MB

  • memory/2312-17-0x0000000000400000-0x00000000005AE000-memory.dmp

    Filesize

    1.7MB

  • memory/2312-16-0x00000000028C0000-0x0000000002968000-memory.dmp

    Filesize

    672KB

  • memory/2716-0-0x0000000000840000-0x0000000000891000-memory.dmp

    Filesize

    324KB

  • memory/2716-1-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/2716-14-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/2716-13-0x0000000000840000-0x0000000000891000-memory.dmp

    Filesize

    324KB

  • memory/2716-11-0x0000000000400000-0x00000000005AE000-memory.dmp

    Filesize

    1.7MB