Analysis

  • max time kernel
    43s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29-01-2023 12:32

General

  • Target

    9f861af0865c11876260b8f5dc98f79e692d97cf481768d88f808da83b9eaee3.exe

  • Size

    861KB

  • MD5

    9905a37faf38c17aead5bab3856a10f6

  • SHA1

    04366e15e42148dca66e53bc96ef9fd7a8f18e44

  • SHA256

    9f861af0865c11876260b8f5dc98f79e692d97cf481768d88f808da83b9eaee3

  • SHA512

    71cf500ef94368ef9c364edf3d9b760676138c17e01db91b9c8f63326a8e34ab47b3b2af8f2d846263bb8f218d06fc42604eceebb0baf721662b1b3c3de35e3c

  • SSDEEP

    24576:dA78/eSlW1c98PkHJQ0hYt3fpQGRP3nNAA8MJw:dlPWL+7hYdxQOnaN

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Possible privilege escalation attempt 3 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Loads dropped DLL 4 IoCs
  • Modifies file permissions 1 TTPs 3 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads local data of messenger clients 2 TTPs

    Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

  • Reads user/profile data of web browsers 2 TTPs

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

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

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 41 IoCs
  • Suspicious use of WriteProcessMemory 52 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9f861af0865c11876260b8f5dc98f79e692d97cf481768d88f808da83b9eaee3.exe
    "C:\Users\Admin\AppData\Local\Temp\9f861af0865c11876260b8f5dc98f79e692d97cf481768d88f808da83b9eaee3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Modifies Internet Explorer settings
    • Suspicious use of WriteProcessMemory
    PID:2044
    • C:\Users\Admin\AppData\Local\Temp\9f861af0865c11876260b8f5dc98f79e692d97cf481768d88f808da83b9eaee3.exe
      C:\Users\Admin\AppData\Local\Temp\9f861af0865c11876260b8f5dc98f79e692d97cf481768d88f808da83b9eaee3.exe
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1000
      • C:\Users\Admin\AppData\Roaming\nkdv16c.exe
        "C:\Users\Admin\AppData\Roaming\nkdv16c.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1568
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Local\Temp\BD4.tmp\nkdv16c.cmd""
          4⤵
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:580
          • C:\Windows\SysWOW64\reg.exe
            C:\Windows\System32\reg.exe add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v SFCDisable /t REG_DWORD /d 1 /f
            5⤵
              PID:892
            • C:\Windows\SysWOW64\reg.exe
              C:\Windows\System32\reg.exe add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v SfcDisabled /t REG_DWORD /d 1 /f
              5⤵
                PID:1964
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c wmic Group Where SID="S-1-5-32-544" Get Name /Value
                5⤵
                • Suspicious use of WriteProcessMemory
                PID:1020
                • C:\Windows\SysWOW64\Wbem\WMIC.exe
                  wmic Group Where SID="S-1-5-32-544" Get Name /Value
                  6⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1792
              • C:\Windows\SysWOW64\icacls.exe
                icacls C:\Windows\System32\fltLib.dll /save C:\Windows\System32\fltLib.acl /T
                5⤵
                • Possible privilege escalation attempt
                • Modifies file permissions
                • Drops file in System32 directory
                PID:796
              • C:\Windows\SysWOW64\takeown.exe
                takeown /f C:\Windows\System32\fltLib.dll
                5⤵
                • Possible privilege escalation attempt
                • Modifies file permissions
                • Suspicious use of AdjustPrivilegeToken
                PID:1900
              • C:\Windows\SysWOW64\icacls.exe
                icacls C:\Windows\System32\fltLib.dll /grant Administrators:F
                5⤵
                • Possible privilege escalation attempt
                • Modifies file permissions
                PID:1416
              • C:\Users\Admin\AppData\Local\Temp\nkdcv16.exe
                nkdcv16.exe
                5⤵
                • Executes dropped EXE
                PID:1260

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Defense Evasion

      File Permissions Modification

      1
      T1222

      Modify Registry

      1
      T1112

      Credential Access

      Credentials in Files

      3
      T1081

      Discovery

      System Information Discovery

      1
      T1082

      Collection

      Data from Local System

      3
      T1005

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\BD4.tmp\nkdv16c.cmd
        Filesize

        2KB

        MD5

        a18077e8ca8217c7ac84ac9cadcafb7e

        SHA1

        1d212d0c6bd6da0c8da8869419711e197a7125f7

        SHA256

        c7f92ce8222b40a1b9c934809ddcb467354cabbe0fcba3af6a155a808683e2b5

        SHA512

        352ac2b3c6a6768566296e5fb4186b0e55345717f5422ac2ae656a85f0a4e29ac98d8e63a81a064775cac8bc349f96ccf34b06bddc405fd02e51412d8f7264e6

      • C:\Users\Admin\AppData\Local\Temp\nkdcv16.exe
        Filesize

        823KB

        MD5

        2c182a7c31678076fc7ace093b2d842b

        SHA1

        21146f56c76193cdc790f40e63432e9a440d1f7b

        SHA256

        88f7d722eb65f7aa4b5ec18672eee3042d4db23f574b0057141599ba4205fbfd

        SHA512

        470503ce01696ca90273647366a7d90b17a14b6bbbd0ec6a32e1061e89252b9e7a53c3ec03bbcbf7d9f7cf182997085383719188d68e842f6ad5760bb00f5caf

      • C:\Users\Admin\AppData\Local\Temp\nkdcv16.exe
        Filesize

        823KB

        MD5

        2c182a7c31678076fc7ace093b2d842b

        SHA1

        21146f56c76193cdc790f40e63432e9a440d1f7b

        SHA256

        88f7d722eb65f7aa4b5ec18672eee3042d4db23f574b0057141599ba4205fbfd

        SHA512

        470503ce01696ca90273647366a7d90b17a14b6bbbd0ec6a32e1061e89252b9e7a53c3ec03bbcbf7d9f7cf182997085383719188d68e842f6ad5760bb00f5caf

      • C:\Users\Admin\AppData\Roaming\nkdv16c.exe
        Filesize

        529KB

        MD5

        d9977aa232ade22471469a6487b30f99

        SHA1

        f1c5529d749a6e48c7d13395c92a6eb1c0c9a518

        SHA256

        2394f0d3bec63a501f9bbcb618ac2981b22d49911fa7a3fdba0766d95dd15e62

        SHA512

        a430fed6f5434550b36a596d175efbfcc83e52ca4d678781c44d73f1ed2bdaad8e5712cd2c09b790f9eb10b4562afff3ea8f41aebf4d2fddb104df24eacf6995

      • \Users\Admin\AppData\Local\Temp\BD4.tmp\b2e.dll
        Filesize

        31KB

        MD5

        7b860f28be19d4aef761fb991134a556

        SHA1

        0658a7456d0234dcca598b6ee599fe134d0ecd61

        SHA256

        57a2586d73188a694944c7da60c78380f82fac46452ed1a31c818ceb93e660bc

        SHA512

        a0685a25cbc3fff74aa4ad538ade5282242980f07fe1171e01644e0fa98e1ec6adc87b943290983f6fb5070d26fc15d697ae31a1f570e83e504ae1e4508aefa5

      • \Users\Admin\AppData\Local\Temp\nkdcv16.exe
        Filesize

        823KB

        MD5

        2c182a7c31678076fc7ace093b2d842b

        SHA1

        21146f56c76193cdc790f40e63432e9a440d1f7b

        SHA256

        88f7d722eb65f7aa4b5ec18672eee3042d4db23f574b0057141599ba4205fbfd

        SHA512

        470503ce01696ca90273647366a7d90b17a14b6bbbd0ec6a32e1061e89252b9e7a53c3ec03bbcbf7d9f7cf182997085383719188d68e842f6ad5760bb00f5caf

      • \Users\Admin\AppData\Roaming\nkdv16c.exe
        Filesize

        529KB

        MD5

        d9977aa232ade22471469a6487b30f99

        SHA1

        f1c5529d749a6e48c7d13395c92a6eb1c0c9a518

        SHA256

        2394f0d3bec63a501f9bbcb618ac2981b22d49911fa7a3fdba0766d95dd15e62

        SHA512

        a430fed6f5434550b36a596d175efbfcc83e52ca4d678781c44d73f1ed2bdaad8e5712cd2c09b790f9eb10b4562afff3ea8f41aebf4d2fddb104df24eacf6995

      • \Users\Admin\AppData\Roaming\nkdv16c.exe
        Filesize

        529KB

        MD5

        d9977aa232ade22471469a6487b30f99

        SHA1

        f1c5529d749a6e48c7d13395c92a6eb1c0c9a518

        SHA256

        2394f0d3bec63a501f9bbcb618ac2981b22d49911fa7a3fdba0766d95dd15e62

        SHA512

        a430fed6f5434550b36a596d175efbfcc83e52ca4d678781c44d73f1ed2bdaad8e5712cd2c09b790f9eb10b4562afff3ea8f41aebf4d2fddb104df24eacf6995

      • memory/580-77-0x0000000000000000-mapping.dmp
      • memory/796-84-0x0000000000000000-mapping.dmp
      • memory/892-79-0x0000000000000000-mapping.dmp
      • memory/1000-74-0x0000000000400000-0x00000000004DE000-memory.dmp
        Filesize

        888KB

      • memory/1000-61-0x0000000000400000-0x00000000004DE000-memory.dmp
        Filesize

        888KB

      • memory/1000-66-0x0000000075201000-0x0000000075203000-memory.dmp
        Filesize

        8KB

      • memory/1000-54-0x0000000000400000-0x00000000004DE000-memory.dmp
        Filesize

        888KB

      • memory/1000-75-0x0000000002730000-0x0000000002813000-memory.dmp
        Filesize

        908KB

      • memory/1000-55-0x0000000000400000-0x00000000004DE000-memory.dmp
        Filesize

        888KB

      • memory/1000-67-0x0000000000400000-0x00000000004DE000-memory.dmp
        Filesize

        888KB

      • memory/1000-63-0x0000000000400000-0x00000000004DE000-memory.dmp
        Filesize

        888KB

      • memory/1000-64-0x0000000000441175-mapping.dmp
      • memory/1000-80-0x0000000000400000-0x00000000004DE000-memory.dmp
        Filesize

        888KB

      • memory/1000-57-0x0000000000400000-0x00000000004DE000-memory.dmp
        Filesize

        888KB

      • memory/1000-59-0x0000000000400000-0x00000000004DE000-memory.dmp
        Filesize

        888KB

      • memory/1020-82-0x0000000000000000-mapping.dmp
      • memory/1260-89-0x0000000000000000-mapping.dmp
      • memory/1416-86-0x0000000000000000-mapping.dmp
      • memory/1568-70-0x0000000000000000-mapping.dmp
      • memory/1568-76-0x0000000000400000-0x00000000004E3000-memory.dmp
        Filesize

        908KB

      • memory/1792-83-0x0000000000000000-mapping.dmp
      • memory/1900-85-0x0000000000000000-mapping.dmp
      • memory/1964-81-0x0000000000000000-mapping.dmp