Analysis

  • max time kernel
    1566s
  • max time network
    1567s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    27/01/2024, 06:59

General

  • Target
    $R0/Uninstall Lunar Client.exe
  • Size 404KB
  • Sample240127-hr77msfdc2
  • SHA256 9f621a0c31cc8143f4fe6fef3fd5a50db4066f91422c64dd0df1b0f713929382
  • MD5 SHA1 SHA512 SSDEEP
Score
4/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall Lunar Client.exe
    "C:\Users\Admin\AppData\Local\Temp\$R0\Uninstall Lunar Client.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:3020
    • C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe
      "C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe" _?=C:\Users\Admin\AppData\Local\Temp\$R0\
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1664
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c tasklist /FI "USERNAME eq %USERNAME%" /FI "IMAGENAME eq Lunar Client.exe" | %SYSTEMROOT%\System32\find.exe "Lunar Client.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2568
        • C:\Windows\SysWOW64\tasklist.exe
          tasklist /FI "USERNAME eq Admin" /FI "IMAGENAME eq Lunar Client.exe"
          4⤵
          • Enumerates processes with tasklist
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2636
        • C:\Windows\SysWOW64\find.exe
          C:\Windows\System32\find.exe "Lunar Client.exe"
          4⤵
            PID:2660
        • C:\Program Files\Internet Explorer\iexplore.exe
          "C:\Program Files\Internet Explorer\iexplore.exe" https://lunarclient.com/uninstaller/?installId=unknown
          3⤵
          • Modifies Internet Explorer settings
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2464
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2464 CREDAT:275457 /prefetch:2
            4⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:2964

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          3C428B1A3E5F57D887EC4B864FAC5DCC

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\3C428B1A3E5F57D887EC4B864FAC5DCC
          • Size 914B
          • SHA256 cb3ccbb76031e5e0138f8dd39a23f9de47ffc35e43c1144cea27d46a5ab1cb5f
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
          • Size 65KB
          • SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
          • MD5 SHA1 SHA512 SSDEEP

          F0ACCF77CDCBFF39F6191887F6D2D357

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357
          • Size 1KB
          • SHA256 df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e
          • MD5 SHA1 SHA512

          3C428B1A3E5F57D887EC4B864FAC5DCC

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\3C428B1A3E5F57D887EC4B864FAC5DCC
          • Size 252B
          • SHA256 693dbfac3876a331712aa69e4655e796d5c57c14be24bd6a52e58da89c412725
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 41b154cf49881a8c8b0f16d0aa1cfff8e83c5e3cf40819f84b922bb05a6e946d
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 39ad777423d43f9f47dfa230006e811c8511d559d4804933b110290bd31b42bd
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 4e32d22b025e0ca248d00a6cd8eeb749f512a07268ecf02bcd2d58cc997f4a45
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 bb5bb9a2365a2e1cce4dabf12b1471cb0fafac5be7ba5bb50732316e0bc085ea
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 ac3133ae72235132ee7813d5d9b02c0453194b1214d66c90422c4aa808419617
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 cf4746528318d20053d50d674ba56e77d50bf3416bbad9c445a19d47e8da5c84
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 102304e7a0090056f1381b11a3207d7933fe43c2e56817a43a20e9e76618673a
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 86e6b27faa79c8c43928ea1f6c2e436d8423f94c9dbeb6bdded7f2d75bc0f698
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 18c85bced268f59bb55241e83ce3e430199811c6bd7144a0ecf1ef735cae173d
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 8738bb5064045ddf88b6b438f57258446800922226094e45c4f537f36b6b971f
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 a8d0065d940feacc2818583654874d071f54ede847b3c22379cd0b2b3015a5de
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 a1bcfeb31c75c1867b88222b4a5fdb3540293d2d42ef05bddf0cc788980c75f3
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 02483bd943d8cda47a7418d5c10fbed72b19268152b7d3bf353c3d9d88273bf9
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 11cb5e682eba9ac61ab541f511e28cbca2cb6c1d43512618b2aba5f0978128e5
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 0d381b88821bef9fddf30025770e69227137488b9357fac9b87f0e70c9c70a3b
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 375c373e3131587ff8f2eebc9e12fbe6b5b1d92cd10b127548651bc462c551b1
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 ef771074a12486ff8783e1e14394ac9a248679f981f08f319bd44fff0381da29
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 b7c6de3d056fa6550464f4b87f63bcd8440af03a1f979a208d43e9f3fa78f5ec
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 43c1c92fab3fbad8d13967af0a313905cb0f309f8120aac4806d30672a04cf5b
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 22cda726bb1e3aea940420b15088ebd7fcd73117151f7022433c80f246e1abf0
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 e3fa19fa4cdb87e36b9c4a4ee03623902b773b922016581ab0cf8701232682b9
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 fbf129f7cc2ae05025a2fc21cbf48c7c1560f2585c5b1e8063855dd0e81198a6
          • MD5 SHA1 SHA512

          94308059B57B3142E455B38A6EB92015

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
          • Size 344B
          • SHA256 86124f97fcfe7d1981a8d46bc69e10931c82683d9add8e405e4a0ede59b7ec0b
          • MD5 SHA1 SHA512

          F0ACCF77CDCBFF39F6191887F6D2D357

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357
          • Size 242B
          • SHA256 773f04efdf7783750e20cbfe926a93df8564e3925d3eba80e0a33ac1a53779b1
          • MD5 SHA1 SHA512

          search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico

          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico
          • Size 4KB
          • SHA256 5b2c34b3c4e8dd898b664dba6c3786e2ff9869eff55d673aa48361f11325ed07
          • MD5 SHA1 SHA512 SSDEEP

          Tar2EC3.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\Tar2EC3.tmp
          • Size 171KB
          • SHA256 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f
          • MD5 SHA1 SHA512 SSDEEP

          StdUtils.dll

          • Path \Users\Admin\AppData\Local\Temp\nsdD5A.tmp\StdUtils.dll
          • Size 100KB
          • SHA256 b72e9013a6204e9f01076dc38dabbf30870d44dfc66962adbf73619d4331601e
          • MD5 SHA1 SHA512 SSDEEP

          System.dll

          • Path \Users\Admin\AppData\Local\Temp\nsdD5A.tmp\System.dll
          • Size 12KB
          • SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
          • MD5 SHA1 SHA512 SSDEEP

          WinShell.dll

          • Path \Users\Admin\AppData\Local\Temp\nsdD5A.tmp\WinShell.dll
          • Size 3KB
          • SHA256 9be85b986ea66a6997dde658abe82b3147ed2a1a3dcb784bb5176f41d22815a6
          • MD5 SHA1 SHA512

          nsExec.dll

          • Path \Users\Admin\AppData\Local\Temp\nsdD5A.tmp\nsExec.dll
          • Size 6KB
          • SHA256 5d9ceb1ce5f35aea5f9e5a0c0edeeec04dfefe0c77890c80c70e98209b58b962
          • MD5 SHA1 SHA512 SSDEEP

          Un_A.exe

          • Path \Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe
          • Size 404KB
          • SHA256 9f621a0c31cc8143f4fe6fef3fd5a50db4066f91422c64dd0df1b0f713929382
          • MD5 SHA1 SHA512 SSDEEP