Analysis

  • max time kernel
    154s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/04/2024, 01:24

General

  • Target
    aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe
  • Size 789KB
  • Sample240416-bshj2sff41
  • SHA256 aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detect Neshta payload 5 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Detects executables packed with SmartAssembly 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe
    "C:\Users\Admin\AppData\Local\Temp\aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1616
    • 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\aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3348
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\iZwbTl.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:848
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\iZwbTl" /XML "C:\Users\Admin\AppData\Local\Temp\tmp942D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4248
    • C:\Users\Admin\AppData\Local\Temp\aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe
      "C:\Users\Admin\AppData\Local\Temp\aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe"
      2⤵
        PID:1660
      • C:\Users\Admin\AppData\Local\Temp\aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe
        "C:\Users\Admin\AppData\Local\Temp\aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe"
        2⤵
        • Checks computer location settings
        • Modifies system executable filetype association
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • Modifies registry class
        PID:3796
    • 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=4120 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
      1⤵
        PID:4008

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            powershell.exe.log

            • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
            • Size 2KB
            • SHA256 92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
            • MD5 SHA1 SHA512

            aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe

            • Path C:\Users\Admin\AppData\Local\Temp\3582-490\aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109.exe
            • Size 749KB
            • SHA256 de1a598505c47afc57ccd600c4c14ba710d1ab38ee12d696dfe8e30de7f3a1cf
            • MD5 SHA1 SHA512 SSDEEP

            __PSScriptPolicyTest_ckjr25uq.m1i.ps1

            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ckjr25uq.m1i.ps1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512

            tmp942D.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\tmp942D.tmp
            • Size 1KB
            • SHA256 497fd5eba57c1e8f8d510127bf9285e9f696948f7c7181afa04ea9eb64a9c63a
            • MD5 SHA1 SHA512

            iZwbTl.exe

            • Path C:\Users\Admin\AppData\Roaming\iZwbTl.exe
            • Size 789KB
            • SHA256 aec8415d0972e902d53d348ebc7beaf6c575f9ec6e12791173ab1d84e90a1109
            • MD5 SHA1 SHA512 SSDEEP

            OFFICE~1.EXE

            • Path C:\odt\OFFICE~1.EXE
            • Size 5.1MB
            • SHA256 ffad1db689d19a1823f619aceda3eb5b5e9c5123105dd1eeacefc1e8d6066597
            • MD5 SHA1 SHA512 SSDEEP

            memory/848-94-0x0000000006FF0000-0x0000000006FFA000-memory.dmp

            memory/848-62-0x00000000057C0000-0x0000000005B14000-memory.dmp

            memory/848-69-0x0000000006230000-0x0000000006262000-memory.dmp

            memory/848-68-0x000000007FC40000-0x000000007FC50000-memory.dmp

            memory/848-67-0x0000000004780000-0x0000000004790000-memory.dmp

            memory/848-91-0x0000000006ED0000-0x0000000006F73000-memory.dmp

            memory/848-93-0x0000000006F80000-0x0000000006F9A000-memory.dmp

            memory/848-101-0x0000000074AB0000-0x0000000075260000-memory.dmp

            memory/848-109-0x0000000074AB0000-0x0000000075260000-memory.dmp

            memory/848-80-0x0000000071A20000-0x0000000071A6C000-memory.dmp

            memory/848-20-0x0000000074AB0000-0x0000000075260000-memory.dmp

            memory/848-21-0x0000000004780000-0x0000000004790000-memory.dmp

            memory/848-22-0x0000000004DC0000-0x00000000053E8000-memory.dmp

            memory/848-63-0x0000000005CD0000-0x0000000005CEE000-memory.dmp

            memory/848-104-0x0000000005B30000-0x0000000005B38000-memory.dmp

            memory/848-103-0x0000000005B40000-0x0000000005B5A000-memory.dmp

            memory/848-64-0x0000000005D20000-0x0000000005D6C000-memory.dmp

            memory/848-98-0x00000000071B0000-0x00000000071BE000-memory.dmp

            memory/848-36-0x0000000004C60000-0x0000000004C82000-memory.dmp

            memory/1616-2-0x0000000005B50000-0x00000000060F4000-memory.dmp

            memory/1616-9-0x0000000007EF0000-0x0000000007EFC000-memory.dmp

            memory/1616-6-0x0000000005B20000-0x0000000005B32000-memory.dmp

            memory/1616-0-0x0000000074AB0000-0x0000000075260000-memory.dmp

            memory/1616-4-0x0000000005410000-0x0000000005420000-memory.dmp

            memory/1616-3-0x0000000005440000-0x00000000054D2000-memory.dmp

            memory/1616-1-0x0000000000960000-0x0000000000A2C000-memory.dmp

            memory/1616-5-0x0000000005420000-0x000000000542A000-memory.dmp

            memory/1616-37-0x0000000074AB0000-0x0000000075260000-memory.dmp

            memory/1616-12-0x000000000A740000-0x000000000A7DC000-memory.dmp

            memory/1616-11-0x0000000007FC0000-0x000000000804C000-memory.dmp

            memory/1616-10-0x0000000005410000-0x0000000005420000-memory.dmp

            memory/1616-7-0x0000000074AB0000-0x0000000075260000-memory.dmp

            memory/1616-8-0x0000000005B40000-0x0000000005B48000-memory.dmp

            memory/3348-95-0x0000000007E40000-0x0000000007ED6000-memory.dmp

            memory/3348-99-0x0000000007DF0000-0x0000000007DFE000-memory.dmp

            memory/3348-70-0x0000000071A20000-0x0000000071A6C000-memory.dmp

            memory/3348-66-0x0000000001760000-0x0000000001770000-memory.dmp

            memory/3348-92-0x0000000008250000-0x00000000088CA000-memory.dmp

            memory/3348-15-0x0000000074AB0000-0x0000000075260000-memory.dmp

            memory/3348-42-0x00000000062D0000-0x0000000006336000-memory.dmp

            memory/3348-41-0x00000000061F0000-0x0000000006256000-memory.dmp

            memory/3348-96-0x0000000007DC0000-0x0000000007DD1000-memory.dmp

            memory/3348-97-0x0000000001760000-0x0000000001770000-memory.dmp

            memory/3348-65-0x0000000074AB0000-0x0000000075260000-memory.dmp

            memory/3348-81-0x0000000006E40000-0x0000000006E5E000-memory.dmp

            memory/3348-100-0x0000000001760000-0x0000000001770000-memory.dmp

            memory/3348-108-0x0000000074AB0000-0x0000000075260000-memory.dmp

            memory/3348-102-0x0000000006260000-0x0000000006274000-memory.dmp

            memory/3348-16-0x0000000001760000-0x0000000001770000-memory.dmp

            memory/3348-17-0x0000000002F00000-0x0000000002F36000-memory.dmp

            memory/3796-24-0x0000000000400000-0x000000000041B000-memory.dmp

            memory/3796-25-0x0000000000400000-0x000000000041B000-memory.dmp

            memory/3796-27-0x0000000000400000-0x000000000041B000-memory.dmp

            memory/3796-110-0x0000000000400000-0x000000000041B000-memory.dmp

            memory/3796-29-0x0000000000400000-0x000000000041B000-memory.dmp