Resubmissions

01-10-2024 05:13

241001-fwv2rsscqm 10

01-10-2024 05:10

241001-ft4acswekb 8

Analysis

  • max time kernel
    146s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240910-ja
  • resource tags

    arch:x64arch:x86image:win10v2004-20240910-jalocale:ja-jpos:windows10-2004-x64systemwindows
  • submitted
    01-10-2024 05:13

General

  • Target

    お見積り依頼.exe

  • Size

    625KB

  • MD5

    a0ecf580ff9dfd9e2a7fa0c3d65f7fd6

  • SHA1

    bbe051177c884c85675df9747d86efa1db0f77a4

  • SHA256

    c46f4ce81d7501f1beca7fb5c694a7e2883ba4e29c498772c448232f7473aafe

  • SHA512

    ef030e4ea6807ec2276e32772a517bca9f88a4891e291d3baf4a5c7dae1739604df173198eccb8583344c6f4d918b7df2f6c298f0be8b5bae4c123e7fdad34fa

  • SSDEEP

    12288:oJOkHljdod9R5CHTCIM0Tr/koAyUoQepfHsz:g69R5ObpTr/kAPjO

Malware Config

Signatures

  • Snake Keylogger

    Keylogger and Infostealer first seen in November 2020.

  • Snake Keylogger payload 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 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 3 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 10 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 28 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe
    "C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2732
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1556
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3764
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EZIgSdDLNPemJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1921.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:1920
    • C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe
      "C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe"
      2⤵
        PID:1768
      • C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe
        "C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe"
        2⤵
          PID:2824
        • C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe
          "C:\Users\Admin\AppData\Local\Temp\お見積り依頼.exe"
          2⤵
          • Accesses Microsoft Outlook profiles
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3516
      • C:\Windows\system32\mmc.exe
        "C:\Windows\system32\mmc.exe" "C:\Windows\system32\taskschd.msc" /s
        1⤵
        • Drops file in System32 directory
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:3824
      • C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe
        C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe
        1⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4732
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe"
          2⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:3904
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe"
          2⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:5076
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\EZIgSdDLNPemJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4711.tmp"
          2⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:3236
        • C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe
          "C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe"
          2⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • outlook_office_path
          • outlook_win_path
          PID:2968

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

        Filesize

        2KB

        MD5

        968cb9309758126772781b83adb8a28f

        SHA1

        8da30e71accf186b2ba11da1797cf67f8f78b47c

        SHA256

        92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

        SHA512

        4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        302B

        MD5

        a45a81d65c8a50a12d91449384a1e741

        SHA1

        002b539986acf6accc1141441e4182a309832aa3

        SHA256

        ee0ed116be65dc153b20ffb9fc5d8717d3e22e179f5bcd9bebff19c1b14e8df9

        SHA512

        7c7164f0e3aea2a17d33fa622abb36e0550ff6690426be18fecf5d221deae874661ac56672101a15631309b6ff633135d24790e36c5d6d4164f1ce8fee3768e8

      • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

        Filesize

        18KB

        MD5

        ee46c6d8e2d01de30627fa52a73a5f59

        SHA1

        0e0f08d16fe9f4e57a6aea323e878031400734fc

        SHA256

        e4d002b803299c7c957b4b4982b0c74639142522e863e648e2ca2678e3d4b7e0

        SHA512

        f0cc30ed505ecf93b56083c57d76cd8d1d188d8b077f52d1535b9fd539c68ba2c393092a8c8e5b88b5847819eb944c8576aadad15fe0243de833f7ca3d335573

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qn3z24di.m0t.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • C:\Users\Admin\AppData\Local\Temp\tmp1921.tmp

        Filesize

        1KB

        MD5

        5f9467586b0fa3405d7872414cefbd76

        SHA1

        127c0a82a70ea22e5be096396bc4dc9abeba4eea

        SHA256

        77e0f75100197c95a4c6a23daae622a370cd9414d84ede3a21d594be348d30a7

        SHA512

        7b0a9f54c10443df67f7a7c58d47da486d540d1148ffce20ef14f0840c915e95dfe76d01ee6e733f0b6fa2038489d4335e7b5e43834870d0950e7155e6bd0c69

      • C:\Users\Admin\AppData\Roaming\EZIgSdDLNPemJ.exe

        Filesize

        625KB

        MD5

        a0ecf580ff9dfd9e2a7fa0c3d65f7fd6

        SHA1

        bbe051177c884c85675df9747d86efa1db0f77a4

        SHA256

        c46f4ce81d7501f1beca7fb5c694a7e2883ba4e29c498772c448232f7473aafe

        SHA512

        ef030e4ea6807ec2276e32772a517bca9f88a4891e291d3baf4a5c7dae1739604df173198eccb8583344c6f4d918b7df2f6c298f0be8b5bae4c123e7fdad34fa

      • memory/1556-20-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/1556-24-0x0000000004CC0000-0x0000000004CE2000-memory.dmp

        Filesize

        136KB

      • memory/1556-92-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/1556-86-0x0000000007250000-0x0000000007258000-memory.dmp

        Filesize

        32KB

      • memory/1556-54-0x0000000006E80000-0x0000000006EB2000-memory.dmp

        Filesize

        200KB

      • memory/1556-83-0x0000000007200000-0x000000000720E000-memory.dmp

        Filesize

        56KB

      • memory/1556-16-0x0000000002180000-0x00000000021B6000-memory.dmp

        Filesize

        216KB

      • memory/1556-17-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/1556-18-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/1556-19-0x0000000005000000-0x0000000005628000-memory.dmp

        Filesize

        6.2MB

      • memory/1556-81-0x0000000007290000-0x0000000007326000-memory.dmp

        Filesize

        600KB

      • memory/1556-80-0x00000000071A0000-0x00000000071F0000-memory.dmp

        Filesize

        320KB

      • memory/1556-76-0x0000000006EC0000-0x0000000006F63000-memory.dmp

        Filesize

        652KB

      • memory/1556-26-0x0000000004DD0000-0x0000000004E36000-memory.dmp

        Filesize

        408KB

      • memory/1556-30-0x0000000005630000-0x0000000005984000-memory.dmp

        Filesize

        3.3MB

      • memory/1556-65-0x0000000006E40000-0x0000000006E5E000-memory.dmp

        Filesize

        120KB

      • memory/1556-55-0x0000000071840000-0x000000007188C000-memory.dmp

        Filesize

        304KB

      • memory/1556-53-0x0000000006230000-0x000000000627C000-memory.dmp

        Filesize

        304KB

      • memory/1556-52-0x0000000004FC0000-0x0000000004FDE000-memory.dmp

        Filesize

        120KB

      • memory/1556-25-0x0000000004D60000-0x0000000004DC6000-memory.dmp

        Filesize

        408KB

      • memory/2732-10-0x00000000030F0000-0x000000000315A000-memory.dmp

        Filesize

        424KB

      • memory/2732-6-0x0000000008430000-0x000000000853E000-memory.dmp

        Filesize

        1.1MB

      • memory/2732-50-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/2732-1-0x0000000000C50000-0x0000000000CF2000-memory.dmp

        Filesize

        648KB

      • memory/2732-2-0x0000000005BA0000-0x0000000006144000-memory.dmp

        Filesize

        5.6MB

      • memory/2732-0-0x000000007535E000-0x000000007535F000-memory.dmp

        Filesize

        4KB

      • memory/2732-9-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/2732-11-0x000000000CBA0000-0x000000000CC3C000-memory.dmp

        Filesize

        624KB

      • memory/2732-4-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/2732-7-0x00000000083A0000-0x00000000083BE000-memory.dmp

        Filesize

        120KB

      • memory/2732-5-0x00000000057A0000-0x00000000057AA000-memory.dmp

        Filesize

        40KB

      • memory/2732-8-0x000000007535E000-0x000000007535F000-memory.dmp

        Filesize

        4KB

      • memory/2732-3-0x00000000056E0000-0x0000000005772000-memory.dmp

        Filesize

        584KB

      • memory/3516-94-0x00000000054C0000-0x00000000054D4000-memory.dmp

        Filesize

        80KB

      • memory/3516-95-0x0000000006710000-0x00000000068D2000-memory.dmp

        Filesize

        1.8MB

      • memory/3516-28-0x0000000000400000-0x0000000000426000-memory.dmp

        Filesize

        152KB

      • memory/3764-23-0x0000000004C50000-0x0000000004CE2000-memory.dmp

        Filesize

        584KB

      • memory/3764-27-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/3764-84-0x0000000007340000-0x0000000007354000-memory.dmp

        Filesize

        80KB

      • memory/3764-21-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/3764-85-0x00000000073A0000-0x00000000073BA000-memory.dmp

        Filesize

        104KB

      • memory/3764-79-0x00000000071A0000-0x00000000071AA000-memory.dmp

        Filesize

        40KB

      • memory/3764-78-0x0000000007120000-0x000000000713A000-memory.dmp

        Filesize

        104KB

      • memory/3764-93-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/3764-77-0x0000000007770000-0x0000000007DEA000-memory.dmp

        Filesize

        6.5MB

      • memory/3764-51-0x0000000004F80000-0x0000000004F90000-memory.dmp

        Filesize

        64KB

      • memory/3764-29-0x0000000075350000-0x0000000075B00000-memory.dmp

        Filesize

        7.7MB

      • memory/3764-82-0x00000000072B0000-0x00000000072C1000-memory.dmp

        Filesize

        68KB

      • memory/3764-66-0x0000000071840000-0x000000007188C000-memory.dmp

        Filesize

        304KB

      • memory/3824-96-0x000000001D150000-0x000000001D25E000-memory.dmp

        Filesize

        1.1MB

      • memory/3824-99-0x000000001D310000-0x000000001D332000-memory.dmp

        Filesize

        136KB

      • memory/3824-98-0x000000001D770000-0x000000001D916000-memory.dmp

        Filesize

        1.6MB

      • memory/3824-97-0x0000000004E60000-0x0000000004E6E000-memory.dmp

        Filesize

        56KB

      • memory/3904-113-0x00000000056B0000-0x0000000005A04000-memory.dmp

        Filesize

        3.3MB

      • memory/3904-129-0x00000000715A0000-0x00000000715EC000-memory.dmp

        Filesize

        304KB

      • memory/5076-127-0x0000000005D30000-0x0000000005D7C000-memory.dmp

        Filesize

        304KB

      • memory/5076-128-0x00000000715A0000-0x00000000715EC000-memory.dmp

        Filesize

        304KB

      • memory/5076-139-0x0000000006F00000-0x0000000006FA3000-memory.dmp

        Filesize

        652KB

      • memory/5076-150-0x0000000007230000-0x0000000007244000-memory.dmp

        Filesize

        80KB

      • memory/5076-149-0x0000000007200000-0x0000000007211000-memory.dmp

        Filesize

        68KB