Analysis

  • max time kernel
    162s
  • max time network
    158s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    29-06-2022 07:54

General

  • Target

    justificante de la transferencia.jar

  • Size

    633KB

  • MD5

    fbbe867f061bcb408da65984170ba74e

  • SHA1

    b590a6713dea76b60b5e4fd485e2b3359db656b5

  • SHA256

    95c7d2c1ca46c6e1ac08ad933faa802f8d71eaacaa78e8df96a2f487b3030d78

  • SHA512

    a4bc77de1b68ee3375e83a40a2a501355a82ca51d12beaf86a608953883770fdf0d023688b70665d7649289094d0851ce1b5898c00939c51858d7f91e71dede8

Malware Config

Extracted

Family

vjw0rm

C2

http://paypalintelsassistant.duia.ro:8153

Signatures

  • AdWind

    A Java-based RAT family operated as malware-as-a-service.

  • Vjw0rm

    Vjw0rm is a remote access trojan written in JavaScript.

  • Blocklisted process makes network request 14 IoCs
  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Windows\system32\java.exe
    java -jar "C:\Users\Admin\AppData\Local\Temp\justificante de la transferencia.jar"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1960
    • C:\Windows\system32\wscript.exe
      wscript C:\Users\Admin\nekbnikfmf.js
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:964
      • C:\Windows\System32\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\EzNnZwZCES.js"
        3⤵
        • Blocklisted process makes network request
        • Drops startup file
        • Adds Run key to start application
        PID:588
      • C:\Program Files\Java\jre7\bin\javaw.exe
        "C:\Program Files\Java\jre7\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\misfotr.txt"
        3⤵
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:332
        • C:\Program Files\Java\jre7\bin\java.exe
          "C:\Program Files\Java\jre7\bin\java.exe" -jar C:\Users\Admin\AppData\Local\Temp\_0.8265727181294524425271145760539092.class
          4⤵
          • Drops file in System32 directory
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1780
          • C:\Windows\system32\cmd.exe
            cmd.exe /C cscript.exe C:\Users\Admin\AppData\Local\Temp\Retrive4555004877700412263.vbs
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:1016
            • C:\Windows\system32\cscript.exe
              cscript.exe C:\Users\Admin\AppData\Local\Temp\Retrive4555004877700412263.vbs
              6⤵
                PID:580
            • C:\Windows\system32\cmd.exe
              cmd.exe /C cscript.exe C:\Users\Admin\AppData\Local\Temp\Retrive8234137651776324086.vbs
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:1688
              • C:\Windows\system32\cscript.exe
                cscript.exe C:\Users\Admin\AppData\Local\Temp\Retrive8234137651776324086.vbs
                6⤵
                  PID:1768
              • C:\Windows\system32\xcopy.exe
                xcopy "C:\Program Files\Java\jre7" "C:\Users\Admin\AppData\Roaming\Oracle\" /e
                5⤵
                  PID:1872
                • C:\Windows\system32\cmd.exe
                  cmd.exe
                  5⤵
                    PID:1348
                • C:\Windows\system32\cmd.exe
                  cmd.exe /C cscript.exe C:\Users\Admin\AppData\Local\Temp\Retrive3385172011414537236.vbs
                  4⤵
                  • Suspicious use of WriteProcessMemory
                  PID:1600
                  • C:\Windows\system32\cscript.exe
                    cscript.exe C:\Users\Admin\AppData\Local\Temp\Retrive3385172011414537236.vbs
                    5⤵
                      PID:1008
                  • C:\Windows\system32\cmd.exe
                    cmd.exe /C cscript.exe C:\Users\Admin\AppData\Local\Temp\Retrive5080827793365894929.vbs
                    4⤵
                      PID:972
                      • C:\Windows\system32\cscript.exe
                        cscript.exe C:\Users\Admin\AppData\Local\Temp\Retrive5080827793365894929.vbs
                        5⤵
                          PID:1144
                      • C:\Windows\system32\xcopy.exe
                        xcopy "C:\Program Files\Java\jre7" "C:\Users\Admin\AppData\Roaming\Oracle\" /e
                        4⤵
                          PID:2004

                  Network

                  MITRE ATT&CK Matrix ATT&CK v6

                  Persistence

                  Registry Run Keys / Startup Folder

                  1
                  T1060

                  Defense Evasion

                  Modify Registry

                  1
                  T1112

                  Discovery

                  System Information Discovery

                  1
                  T1082

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • C:\Users\Admin\AppData\Local\Temp\Retrive3385172011414537236.vbs
                    Filesize

                    276B

                    MD5

                    3bdfd33017806b85949b6faa7d4b98e4

                    SHA1

                    f92844fee69ef98db6e68931adfaa9a0a0f8ce66

                    SHA256

                    9da575dd2d5b7c1e9bab8b51a16cde457b3371c6dcdb0537356cf1497fa868f6

                    SHA512

                    ae5e5686ae71edef53e71cd842cb6799e4383b9c238a5c361b81647efa128d2fedf3bf464997771b5b0c47a058fecae7829aeedcd098c80a11008581e5781429

                  • C:\Users\Admin\AppData\Local\Temp\Retrive4555004877700412263.vbs
                    Filesize

                    276B

                    MD5

                    3bdfd33017806b85949b6faa7d4b98e4

                    SHA1

                    f92844fee69ef98db6e68931adfaa9a0a0f8ce66

                    SHA256

                    9da575dd2d5b7c1e9bab8b51a16cde457b3371c6dcdb0537356cf1497fa868f6

                    SHA512

                    ae5e5686ae71edef53e71cd842cb6799e4383b9c238a5c361b81647efa128d2fedf3bf464997771b5b0c47a058fecae7829aeedcd098c80a11008581e5781429

                  • C:\Users\Admin\AppData\Local\Temp\Retrive5080827793365894929.vbs
                    Filesize

                    281B

                    MD5

                    a32c109297ed1ca155598cd295c26611

                    SHA1

                    dc4a1fdbaad15ddd6fe22d3907c6b03727b71510

                    SHA256

                    45bfe34aa3ef932f75101246eb53d032f5e7cf6d1f5b4e495334955a255f32e7

                    SHA512

                    70372552dc86fe02ece9fe3b7721463f80be07a34126b2c75b41e30078cda9e90744c7d644df623f63d4fb985482e345b3351c4d3da873162152c67fc6ecc887

                  • C:\Users\Admin\AppData\Local\Temp\Retrive8234137651776324086.vbs
                    Filesize

                    281B

                    MD5

                    a32c109297ed1ca155598cd295c26611

                    SHA1

                    dc4a1fdbaad15ddd6fe22d3907c6b03727b71510

                    SHA256

                    45bfe34aa3ef932f75101246eb53d032f5e7cf6d1f5b4e495334955a255f32e7

                    SHA512

                    70372552dc86fe02ece9fe3b7721463f80be07a34126b2c75b41e30078cda9e90744c7d644df623f63d4fb985482e345b3351c4d3da873162152c67fc6ecc887

                  • C:\Users\Admin\AppData\Local\Temp\_0.8265727181294524425271145760539092.class
                    Filesize

                    241KB

                    MD5

                    781fb531354d6f291f1ccab48da6d39f

                    SHA1

                    9ce4518ebcb5be6d1f0b5477fa00c26860fe9a68

                    SHA256

                    97d585b6aff62fb4e43e7e6a5f816dcd7a14be11a88b109a9ba9e8cd4c456eb9

                    SHA512

                    3e6630f5feb4a3eb1dac7e9125ce14b1a2a45d7415cf44cea42bc51b2a9aa37169ee4a4c36c888c8f2696e7d6e298e2ad7b2f4c22868aaa5948210eb7db220d8

                  • C:\Users\Admin\AppData\Roaming\EzNnZwZCES.js
                    Filesize

                    15KB

                    MD5

                    1584eda3eb8888cd3b660006f8bb9ee3

                    SHA1

                    8010111a0cefff3eabf04573df573c209ddec12e

                    SHA256

                    3e0ac4509b29caa5c3aaf489ca41fafdb4388a59c3e0d3f64211fe013f6d7f79

                    SHA512

                    ec06fbc6c58077d373b4f4c72f407742f680a9790584c246f84fab3b373b39269762aa5c72c09c6391e794c89e8312f3e18e68462f923194865b5444c38e9fcc

                  • C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-1083475884-596052423-1669053738-1000\83aa4cc77f591dfc2374580bbd95f6ba_206ac020-9434-4197-af4e-48c8ff9cae6c
                    Filesize

                    45B

                    MD5

                    c8366ae350e7019aefc9d1e6e6a498c6

                    SHA1

                    5731d8a3e6568a5f2dfbbc87e3db9637df280b61

                    SHA256

                    11e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238

                    SHA512

                    33c980d5a638bfc791de291ebf4b6d263b384247ab27f261a54025108f2f85374b579a026e545f81395736dd40fa4696f2163ca17640dd47f1c42bc9971b18cd

                  • C:\Users\Admin\AppData\Roaming\misfotr.txt
                    Filesize

                    479KB

                    MD5

                    0af2ffb0e3a810f556a0eef909a5ecc7

                    SHA1

                    641fe60bfa8569a0a13dc9279ea1cafb5cb912ad

                    SHA256

                    9d05feba177ac6b9433f0a28bf9e6ba9828f1621f625f7ca80009a1cf5b5374b

                    SHA512

                    883f01a0d0c2ed6ada0dd3d2b4548d01b54f6cf4fcfd6a39f9a61511147fefc4ea8ad4392873fd54e4d7c1c04adc01c94bf99447ddfcde925340ae4ea409b1c9

                  • C:\Users\Admin\nekbnikfmf.js
                    Filesize

                    932KB

                    MD5

                    d4eeb2910754c6361a251c9741c8a2dc

                    SHA1

                    4add534ede28add3d70ec8fa7432ef9524ec3280

                    SHA256

                    cd76f0a5d341008b11d06eb3bc6ba912b246eba4d825b408963da1348ab2e9ff

                    SHA512

                    ca35542b199874dfb88b6d50c6bc6a0760994e1fd7cfb02bef724a3048c1e0b85055b416c8e157608b08bbd58ea8644012e11d41bd6ccd774b61cc38a27c48ce

                  • memory/332-84-0x00000000024C0000-0x00000000054C0000-memory.dmp
                    Filesize

                    48.0MB

                  • memory/332-70-0x0000000000000000-mapping.dmp
                  • memory/332-115-0x00000000024C0000-0x00000000054C0000-memory.dmp
                    Filesize

                    48.0MB

                  • memory/580-103-0x0000000000000000-mapping.dmp
                  • memory/588-69-0x0000000000000000-mapping.dmp
                  • memory/964-65-0x0000000000000000-mapping.dmp
                  • memory/972-108-0x0000000000000000-mapping.dmp
                  • memory/1008-104-0x0000000000000000-mapping.dmp
                  • memory/1016-102-0x0000000000000000-mapping.dmp
                  • memory/1348-114-0x0000000000000000-mapping.dmp
                  • memory/1600-101-0x0000000000000000-mapping.dmp
                  • memory/1688-107-0x0000000000000000-mapping.dmp
                  • memory/1768-109-0x0000000000000000-mapping.dmp
                  • memory/1780-97-0x0000000002350000-0x0000000005350000-memory.dmp
                    Filesize

                    48.0MB

                  • memory/1780-85-0x0000000000000000-mapping.dmp
                  • memory/1780-116-0x0000000002350000-0x0000000005350000-memory.dmp
                    Filesize

                    48.0MB

                  • memory/1872-112-0x0000000000000000-mapping.dmp
                  • memory/1960-54-0x000007FEFB871000-0x000007FEFB873000-memory.dmp
                    Filesize

                    8KB

                  • memory/1960-64-0x00000000021E0000-0x00000000051E0000-memory.dmp
                    Filesize

                    48.0MB

                  • memory/2004-113-0x0000000000000000-mapping.dmp