Analysis

  • max time kernel
    147s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20220331-en
  • submitted
    07/04/2022, 14:56

General

  • Target
    crypted_loader_dll_64Donat_5.dll
  • Size 151KB
  • Sample220407-sa1rcaefen
  • SHA256 41ae907a2bb73794bb2cff40b429e62305847a3e1a95f188b596f1cf925c4547
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Family
  • gozi_rm3

Attributes
  • build

    300994

rsa_pubkey.base64

Signatures

  • Gozi RM3

    A heavily modified version of Gozi using RM3 loader.

  • Uses Tor communications 1 TTPs

    Malware can proxy its traffic through Tor for more anonymity.

  • Drops file in System32 directory 3 IoCs
  • Modifies Internet Explorer settings 1 TTPs 47 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 11 IoCs
  • Suspicious use of SetWindowsHookEx 44 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:1268
      • C:\Windows\system32\regsvr32.exe
        regsvr32 /s C:\Users\Admin\AppData\Local\Temp\crypted_loader_dll_64Donat_5.dll
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:696
        • C:\Windows\SysWOW64\regsvr32.exe
          /s C:\Users\Admin\AppData\Local\Temp\crypted_loader_dll_64Donat_5.dll
          3⤵
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:1228
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /c start /min forfiles /c "cmd /k @path -ec aQBlAHgAIAAoAGcAcAAgACcASABLAEMAVQA6AFwAUwBvAGYAdAB3AGEAcgBlAFwAQwB1AHIAcAByAG8AYwBlAHMAcwAnACkALgBUAA== & exit" /p C:\Windows\system32 /s /m po*l.e*e
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1344
        • C:\Windows\system32\forfiles.exe
          forfiles /c "cmd /k @path -ec aQBlAHgAIAAoAGcAcAAgACcASABLAEMAVQA6AFwAUwBvAGYAdAB3AGEAcgBlAFwAQwB1AHIAcAByAG8AYwBlAHMAcwAnACkALgBUAA== & exit" /p C:\Windows\system32 /s /m po*l.e*e
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:756
          • C:\Windows\system32\cmd.exe
            /k "C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" -ec aQBlAHgAIAAoAGcAcAAgACcASABLAEMAVQA6AFwAUwBvAGYAdAB3AGEAcgBlAFwAQwB1AHIAcAByAG8AYwBlAHMAcwAnACkALgBUAA== & exit
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:1304
            • C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
              C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe -ec aQBlAHgAIAAoAGcAcAAgACcASABLAEMAVQA6AFwAUwBvAGYAdAB3AGEAcgBlAFwAQwB1AHIAcAByAG8AYwBlAHMAcwAnACkALgBUAA==
              5⤵
              • Drops file in System32 directory
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious behavior: MapViewOfSection
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:1676
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -E JwBwAGEAcgBhAG0AKAAkAGgAcgBoAGMAZQB3AGQAYQB4AGUAKQA7AFsAUwB5AHMAdABlAG0ALgBDAG8AbgB2AGUAcgB0AF0AOgA6AEYAcgBvAG0AQgBhAHMAZQA2ADQAUwB0AHIAaQBuAGcAKAAkAGgAcgBoAGMAZQB3AGQAYQB4AGUAKQAnAA==
                6⤵
                • Drops file in System32 directory
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1388
              • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -E JwBwAGEAcgBhAG0AKAAkAGQAZgBvAG0AaABlAGwAcwBvAGgAKQA7AFsAUwB5AHMAdABlAG0ALgBUAGUAeAB0AC4ARQBuAGMAbwBkAGkAbgBnAF0AOgA6AEEAUwBDAEkASQAuAEcAZQB0AFMAdAByAGkAbgBnACgAJABkAGYAbwBtAGgAZQBsAHMAbwBoACkAJwA=
                6⤵
                • Drops file in System32 directory
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1584
              • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
                "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\wrqorzcf.cmdline"
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:2084
                • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
                  C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESDD95.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCDD84.tmp"
                  7⤵
                    PID:2104
                • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
                  "C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\lrh239up.cmdline"
                  6⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2132
                  • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
                    C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESDE6F.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCDE6E.tmp"
                    7⤵
                      PID:2152
        • C:\Program Files\Internet Explorer\iexplore.exe
          "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
          1⤵
          • Modifies Internet Explorer settings
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1184
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1184 CREDAT:275457 /prefetch:2
            2⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:816
          • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
            "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1184 CREDAT:799749 /prefetch:2
            2⤵
            • Modifies Internet Explorer settings
            • Suspicious use of SetWindowsHookEx
            PID:1904

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              103621DE9CD5414CC2538780B4B75751

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751
              • Size 717B
              • SHA256 45f94dceb18a8f738a26da09ce4558995a4fe02b971882e8116fc9b59813bb72
              • MD5 SHA1 SHA512

              103621DE9CD5414CC2538780B4B75751

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751
              • Size 192B
              • SHA256 0e298d43926a127dd7a0b3446bed214d7136f8f8acd2643d2737009b179ea8df
              • MD5 SHA1 SHA512

              94308059B57B3142E455B38A6EB92015

              • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
              • Size 344B
              • SHA256 133d11ed1bfc657aeadb44abc4b1df5bc11abe30a92c9c9c0dcb4bef08c048be
              • MD5 SHA1 SHA512

              imagestore.dat

              • Path C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\9a0npr3\imagestore.dat
              • Size 4KB
              • SHA256 e06886726cf0749085f8604ad6b497daaf546f76bbb5128a719a5191c6780d3b
              • MD5 SHA1 SHA512 SSDEEP

              favicon[1].ico

              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\XKL01CLS\favicon[1].ico
              • Size 318B
              • SHA256 66332859bd8e3441a019e073a318b62a47014ba244121301034b510dc7532271
              • MD5 SHA1 SHA512

              RESDD95.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\RESDD95.tmp
              • Size 1KB
              • SHA256 a7c0f91cb5fc873f1975f1d4e5f690ddca4685d93e790ebdd9e0f2993887f936
              • MD5 SHA1 SHA512

              RESDE6F.tmp

              • Path C:\Users\Admin\AppData\Local\Temp\RESDE6F.tmp
              • Size 1KB
              • SHA256 36fb77778ef8cba4e5c5a314294e3f4d72b13c8d9bb446f8e80ad0315d4a8bf4
              • MD5 SHA1 SHA512

              lrh239up.dll

              • Path C:\Users\Admin\AppData\Local\Temp\lrh239up.dll
              • Size 3KB
              • SHA256 fbc7a914136b162ce0686e9f148cb785e8faff93e00067acd8fd0cd1f7bc80b9
              • MD5 SHA1 SHA512

              lrh239up.pdb

              • Path C:\Users\Admin\AppData\Local\Temp\lrh239up.pdb
              • Size 7KB
              • SHA256 3020972c365ef50bb03f49a6080e7d3f590f34f5f7a2dbd6026fc6a587bb5a32
              • MD5 SHA1 SHA512 SSDEEP

              wrqorzcf.dll

              • Path C:\Users\Admin\AppData\Local\Temp\wrqorzcf.dll
              • Size 3KB
              • SHA256 e32172d4b690f625a133ecdc9e99526e5588d95c44d7e9b55cd7af25a7dc1bc4
              • MD5 SHA1 SHA512

              wrqorzcf.pdb

              • Path C:\Users\Admin\AppData\Local\Temp\wrqorzcf.pdb
              • Size 7KB
              • SHA256 820ae6e9ec4f264e413e9791d4bea77579a033d800001be1ccf7d3a68d935c4b
              • MD5 SHA1 SHA512 SSDEEP

              590aee7bdd69b59b.customDestinations-ms

              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
              • Size 7KB
              • SHA256 5a10e8c12d3279842accfa6a4d938a132b374b6b6ef533ca645d07942585d0d1
              • MD5 SHA1 SHA512 SSDEEP

              590aee7bdd69b59b.customDestinations-ms

              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
              • Size 7KB
              • SHA256 5a10e8c12d3279842accfa6a4d938a132b374b6b6ef533ca645d07942585d0d1
              • MD5 SHA1 SHA512 SSDEEP

              CSCDD84.tmp

              • Path \??\c:\Users\Admin\AppData\Local\Temp\CSCDD84.tmp
              • Size 652B
              • SHA256 5b4937b0d214c7978ed6a9248b0a7c2a8ef59e1359d20b8e347be9b8c3fe0741
              • MD5 SHA1 SHA512

              CSCDE6E.tmp

              • Path \??\c:\Users\Admin\AppData\Local\Temp\CSCDE6E.tmp
              • Size 652B
              • SHA256 4e4ae5cb521386ccd9b827b5d84205fb7bae86bc46bd3684f585a985f0b8f7bc
              • MD5 SHA1 SHA512

              lrh239up.0.cs

              • Path \??\c:\Users\Admin\AppData\Local\Temp\lrh239up.0.cs
              • Size 416B
              • SHA256 2598df56dcfc916eb9ae7b571c67d2feb92740843e36caccf9df705c03145265
              • MD5 SHA1 SHA512

              lrh239up.cmdline

              • Path \??\c:\Users\Admin\AppData\Local\Temp\lrh239up.cmdline
              • Size 309B
              • SHA256 cd42d47c83f5a475544dfb4cdecc00c375a858f8ef31edf839d2f4d18103f820
              • MD5 SHA1 SHA512

              wrqorzcf.0.cs

              • Path \??\c:\Users\Admin\AppData\Local\Temp\wrqorzcf.0.cs
              • Size 417B
              • SHA256 7fca4a3b3889149b375ce11cd1614298a244c05e3dd5fa343be56986aaa675c5
              • MD5 SHA1 SHA512

              wrqorzcf.cmdline

              • Path \??\c:\Users\Admin\AppData\Local\Temp\wrqorzcf.cmdline
              • Size 309B
              • SHA256 f24325fdb1a1d1a03c066ef21a951c49c2f90240825f8efc07206b6017adb0f2
              • MD5 SHA1 SHA512

              memory/696-54-0x000007FEFC4E1000-0x000007FEFC4E3000-memory.dmp

              memory/1228-115-0x0000000000480000-0x000000000049A000-memory.dmp

              memory/1228-68-0x0000000000480000-0x0000000000482000-memory.dmp

              memory/1228-62-0x00000000001E0000-0x00000000001F0000-memory.dmp

              memory/1228-57-0x0000000010000000-0x000000001000F000-memory.dmp

              memory/1228-56-0x0000000076E21000-0x0000000076E23000-memory.dmp

              memory/1388-89-0x00000000024BB000-0x00000000024DA000-memory.dmp

              memory/1388-86-0x000007FEF3F70000-0x000007FEF4ACD000-memory.dmp

              memory/1388-87-0x000000001B760000-0x000000001BA5F000-memory.dmp

              memory/1388-88-0x00000000024B4000-0x00000000024B7000-memory.dmp

              memory/1584-93-0x000007FEF3F70000-0x000007FEF4ACD000-memory.dmp

              memory/1584-95-0x0000000002762000-0x0000000002764000-memory.dmp

              memory/1584-94-0x0000000002760000-0x0000000002762000-memory.dmp

              memory/1584-96-0x0000000002764000-0x0000000002767000-memory.dmp

              memory/1584-97-0x000000000276B000-0x000000000278A000-memory.dmp

              memory/1676-80-0x00000000025A2000-0x00000000025A4000-memory.dmp

              memory/1676-81-0x00000000025A4000-0x00000000025A7000-memory.dmp

              memory/1676-82-0x00000000025AB000-0x00000000025CA000-memory.dmp

              memory/1676-79-0x00000000025A0000-0x00000000025A2000-memory.dmp

              memory/1676-78-0x000007FEF3F70000-0x000007FEF4ACD000-memory.dmp

              memory/1676-114-0x000000001B660000-0x000000001B673000-memory.dmp