Analysis

  • user interaction
    yes
  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    16/04/2026, 06:54

General

  • Target
    KakaoTalk_S8542up.exe
  • Size 112.6MB
  • Sample260416-hppbraht7p
  • SHA256 62faa0e58b390e11501226bbee984d95bf329c906c31f5f436b9e72005770922
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 17 IoCs
  • Drops file in System32 directory 1 IoCs
  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

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

  • Modifies data under HKEY_USERS 46 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\KakaoTalk_S8542up.exe
    "C:\Users\Admin\AppData\Local\Temp\KakaoTalk_S8542up.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4572
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /C tasklist | findstr /I /C:"360tray.exe" /C:"HipsTray.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4180
      • C:\Windows\SysWOW64\tasklist.exe
        tasklist
        3⤵
        • Enumerates processes with tasklist
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:4068
      • C:\Windows\SysWOW64\findstr.exe
        findstr /I /C:"360tray.exe" /C:"HipsTray.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:1784
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /C start "" /B cmd.exe /C "powershell Add-MpPreference -ExclusionPath C:\,D:\,F:\"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:420
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /C "powershell Add-MpPreference -ExclusionPath C:\,D:\,F:\"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5020
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell Add-MpPreference -ExclusionPath C:\,D:\,F:\
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3652
    • C:\Users\Admin\AppData\Roaming\comain_ev2f79\ev2f79.exe
      "C:\Users\Admin\AppData\Roaming\comain_ev2f79\ev2f79.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      PID:2504
    • C:\Users\Admin\AppData\Roaming\comain_ev2c34\ev2c34.exe
      "C:\Users\Admin\AppData\Roaming\comain_ev2c34\ev2c34.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:4936
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Drops file in System32 directory
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of AdjustPrivilegeToken
    PID:5488
  • C:\Windows\System32\UserAccountBroker.exe
    C:\Windows\System32\UserAccountBroker.exe
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    PID:896
  • C:\Windows\System32\edpnotify.exe
    C:\Windows\System32\edpnotify.exe
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    PID:5588

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        __PSScriptPolicyTest_rvrumwhg.qhf.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rvrumwhg.qhf.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH

        DcryptDll.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsb14EB.tmp\DcryptDll.dll
        • Size 20KB
        • SHA256 0acb047f854771e2d5f5e7a3a2c8e261c86223988b2b6b00036fe64df994b537
        • MD5 SHA1 SHA512 SSDEEP TLSH

        InstallOptions.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsb14EB.tmp\InstallOptions.dll
        • Size 15KB
        • SHA256 1f8e8f336df6773d6b63bd5a7efbfc889d08888fec55da402eaf93cb950aa283
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsb14EB.tmp\System.dll
        • Size 12KB
        • SHA256 acf90ab6f4edc687e94aaf604d05e16e6cfb5e35873783b50c66f307a35c6506
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ioSpecial.ini

        • Path C:\Users\Admin\AppData\Local\Temp\nsb14EB.tmp\ioSpecial.ini
        • Size 1KB
        • SHA256 4a98757efe5a4bf5d3e6bc9869e43e77173f0021c4404ccd9385f2e7a642e5dc
        • MD5 SHA1 SHA512 TLSH

        ioSpecial.ini

        • Path C:\Users\Admin\AppData\Local\Temp\nsb14EB.tmp\ioSpecial.ini
        • Size 1KB
        • SHA256 488b58025be05ea38b24a36669284423c64d1412cb96b7ede7031de10b78d9a3
        • MD5 SHA1 SHA512 TLSH

        nsExec.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsb14EB.tmp\nsExec.dll
        • Size 7KB
        • SHA256 c1b7c3ef8b77a5bb335dc9ec9c3546b249014dde43aa2a9ed719b4d5933741df
        • MD5 SHA1 SHA512 SSDEEP TLSH

        uk_tmp.txt

        • Path C:\Users\Admin\AppData\Local\Temp\uk_tmp.txt
        • Size 1B
        • SHA256 2d711642b726b04401627ca9fbac32f5c8530fb1903cc4db02258717921a4881
        • MD5 SHA1 SHA512

        ap.asin

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2c34\ap.asin
        • Size 260B
        • SHA256 249dd9d42b17ff71c6dfc60ca06cb8598f9adf307febaaa8c6859e650f224738
        • MD5 SHA1 SHA512 TLSH

        bnymir.ou

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2c34\bnymir.ou
        • Size 403KB
        • SHA256 311f644a8cc871e9fde0dbf9126189f11cf14534d8aadd824954595b56dbe5d8
        • MD5 SHA1 SHA512 SSDEEP TLSH

        bteuns.pt

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2c34\bteuns.pt
        • Size 533KB
        • SHA256 c56bba6fd6236e30d9b5bb7ffea33079a143819fe1f08db346ff7b96acc9cf00
        • MD5 SHA1 SHA512 SSDEEP TLSH

        cmrsk.ce

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2c34\cmrsk.ce
        • Size 166KB
        • SHA256 32c1efcf15430df8e87207bde1916c807378edf6bd9552f02aeb6d50ac56f752
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ev2c34.exe

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2c34\ev2c34.exe
        • Size 873KB
        • SHA256 8f371e32e3ce82f5be4bcf586d24fd1aa305dccfe2eb64cc8989b1aef5f981a6
        • MD5 SHA1 SHA512 SSDEEP TLSH

        fhkan.oi

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2c34\fhkan.oi
        • Size 180KB
        • SHA256 4846e03250931965df77d4fb897fb3d100d451b72a7910a2840630195cfe1246
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dxyvnb.ti

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2f79\dxyvnb.ti
        • Size 56KB
        • SHA256 2ede6fc732c291281f5e51563a4239e38bc9cc57c42719836d51690edf46c525
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ev2f79.exe

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2f79\ev2f79.exe
        • Size 873KB
        • SHA256 d35e2ff510040094c58a409b5f671c7214a59b5822a9c6cf814a50309e36609c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ntrin.er

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2f79\ntrin.er
        • Size 168KB
        • SHA256 0250643af857245804b1836a240104cd8122c995d1e63f45c6ab6cb4d1065532
        • MD5 SHA1 SHA512 SSDEEP TLSH

        otrm.oi

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2f79\otrm.oi
        • Size 141KB
        • SHA256 75100bebbc67795bdcec4e17ef4401fe00a14cbcff6857cbad251d1e103e6568
        • MD5 SHA1 SHA512 SSDEEP TLSH

        yinma.vc

        • Path C:\Users\Admin\AppData\Roaming\comain_ev2f79\yinma.vc
        • Size 478KB
        • SHA256 cc734def371a00e17d744833b7a61f030051d0149712fba9d63bb7400271b12a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/896-344-0x000001C11DF00000-0x000001C11DFD0000-memory.dmp

        memory/896-341-0x000001C11DF00000-0x000001C11DFD0000-memory.dmp

        memory/896-339-0x000001C11DF00000-0x000001C11DFD0000-memory.dmp

        memory/896-338-0x000001C11DF00000-0x000001C11DFD0000-memory.dmp

        memory/896-306-0x0000000180000000-0x000000018006B000-memory.dmp

        memory/896-343-0x000001C11DF00000-0x000001C11DFD0000-memory.dmp

        memory/896-342-0x000001C11DF00000-0x000001C11DFD0000-memory.dmp

        memory/896-340-0x000001C11DF00000-0x000001C11DFD0000-memory.dmp

        memory/2504-152-0x0000000010000000-0x0000000010027000-memory.dmp

        memory/2504-160-0x0000000010000000-0x0000000010027000-memory.dmp

        memory/2504-184-0x0000000010000000-0x0000000010027000-memory.dmp

        memory/2504-161-0x0000000010000000-0x0000000010027000-memory.dmp

        memory/2504-188-0x0000000002170000-0x00000000021CF000-memory.dmp

        memory/2504-158-0x0000000010000000-0x0000000010027000-memory.dmp

        memory/2504-159-0x0000000010000000-0x0000000010027000-memory.dmp

        memory/3652-216-0x0000000007500000-0x000000000751A000-memory.dmp

        memory/3652-225-0x0000000007740000-0x0000000007754000-memory.dmp

        memory/3652-207-0x00000000071C0000-0x0000000007263000-memory.dmp

        memory/3652-208-0x0000000007B40000-0x00000000081BA000-memory.dmp

        memory/3652-206-0x00000000067E0000-0x00000000067FE000-memory.dmp

        memory/3652-162-0x0000000006210000-0x000000000625C000-memory.dmp

        memory/3652-147-0x0000000005D40000-0x0000000006094000-memory.dmp

        memory/3652-219-0x0000000007560000-0x000000000756A000-memory.dmp

        memory/3652-103-0x0000000002980000-0x0000000002990000-memory.dmp

        memory/3652-221-0x0000000007790000-0x0000000007826000-memory.dmp

        memory/3652-222-0x0000000007700000-0x0000000007711000-memory.dmp

        memory/3652-108-0x00000000028A0000-0x00000000028D6000-memory.dmp

        memory/3652-224-0x0000000007730000-0x000000000773E000-memory.dmp

        memory/3652-154-0x00000000061D0000-0x00000000061EE000-memory.dmp

        memory/3652-226-0x0000000007850000-0x000000000786A000-memory.dmp

        memory/3652-227-0x0000000007780000-0x0000000007788000-memory.dmp

        memory/3652-230-0x00000000027E0000-0x000000000283F000-memory.dmp

        memory/3652-231-0x00000000051D0000-0x00000000051DE000-memory.dmp

        memory/3652-197-0x0000000006790000-0x00000000067C2000-memory.dmp

        memory/3652-112-0x0000000002980000-0x0000000002990000-memory.dmp

        memory/3652-126-0x00000000053C0000-0x00000000059E8000-memory.dmp

        memory/3652-198-0x000000006FB90000-0x000000006FBDC000-memory.dmp

        memory/3652-137-0x0000000005200000-0x0000000005222000-memory.dmp

        memory/3652-138-0x0000000005AF0000-0x0000000005B56000-memory.dmp

        memory/3652-139-0x0000000005BD0000-0x0000000005C36000-memory.dmp

        memory/4068-89-0x0000000002FA0000-0x0000000002FFF000-memory.dmp

        memory/4572-179-0x00000000006F0000-0x000000000074F000-memory.dmp

        memory/4572-79-0x00000000006F0000-0x000000000074F000-memory.dmp

        memory/4936-292-0x0000000010000000-0x0000000010031000-memory.dmp

        memory/4936-284-0x0000000010000000-0x0000000010031000-memory.dmp

        memory/4936-293-0x0000000010000000-0x0000000010031000-memory.dmp

        memory/4936-291-0x0000000010000000-0x0000000010031000-memory.dmp

        memory/4936-290-0x0000000010000000-0x0000000010031000-memory.dmp

        memory/4936-337-0x0000000010000000-0x0000000010031000-memory.dmp

        memory/5488-196-0x0000024CC6EB0000-0x0000024CC6ED2000-memory.dmp

        memory/5488-186-0x0000024CC6910000-0x0000024CC691C000-memory.dmp

        memory/5488-166-0x0000000180000000-0x000000018007D000-memory.dmp

        memory/5488-319-0x0000024CC6960000-0x0000024CC6968000-memory.dmp

        memory/5488-223-0x0000024CDFB50000-0x0000024CDFB6C000-memory.dmp

        memory/5488-220-0x0000024CC6EE0000-0x0000024CC6EEA000-memory.dmp

        memory/5488-218-0x0000024CDF710000-0x0000024CDF7C5000-memory.dmp

        memory/5488-217-0x0000024CC6F50000-0x0000024CC6F6C000-memory.dmp

        memory/5588-323-0x0000000180000000-0x000000018008C000-memory.dmp