Analysis

  • max time kernel
    80s
  • max time network
    137s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    01-05-2022 23:37

General

  • Target

    1b48c20c649d7e5876bcbe632bc45c75718a9ca75f0161c1da4d223fe06a6b84.exe

  • Size

    1.9MB

  • MD5

    c6057d2b61be59e1495e001637fadb3d

  • SHA1

    e35d65f9dab12340a14512a6174371a547386e41

  • SHA256

    1b48c20c649d7e5876bcbe632bc45c75718a9ca75f0161c1da4d223fe06a6b84

  • SHA512

    6d38b061600ecf9c529a816bdf00396d3d33ea670443ae956cb5b6bbe9f98efeb5f7ba1142d8b83a7e26c4454aba57e57967aa64b9d6cded381a113bddbcff43

Malware Config

Signatures

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger Main Payload 3 IoCs
  • Executes dropped EXE 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 6 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 35 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1b48c20c649d7e5876bcbe632bc45c75718a9ca75f0161c1da4d223fe06a6b84.exe
    "C:\Users\Admin\AppData\Local\Temp\1b48c20c649d7e5876bcbe632bc45c75718a9ca75f0161c1da4d223fe06a6b84.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1868
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn win64.exe /tr '"C:\Users\Admin\AppData\Roaming\Massive\win64.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:560
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn win64.exe /tr '"C:\Users\Admin\AppData\Roaming\Massive\win64.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1628
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp9BF2.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1616
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1608
      • C:\Users\Admin\AppData\Roaming\Massive\win64.exe
        "C:\Users\Admin\AppData\Roaming\Massive\win64.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • outlook_office_path
        • outlook_win_path
        PID:816
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "powershell" Start-Process -FilePath 'C:\Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe'
          4⤵
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1672
          • C:\Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe
            "C:\Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe"
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            PID:972
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 972 -s 264
              6⤵
              • Program crash
              PID:1844

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • C:\Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • C:\Users\Admin\AppData\Local\Temp\tmp9BF2.tmp.bat

    Filesize

    157B

    MD5

    409a1fdeefed103a3160c81e9ff65189

    SHA1

    25ebb75d1e675704f603e8d2be38061cfe9f2cc2

    SHA256

    2374b4bbcd893f067d7c6212d59e8245bcef7cb9ba44a965e20dcc9eca556bb2

    SHA512

    7d229f3ea03cb75128a732b1b5586a10307b4993f99e2fd182ee238f96c9eba7841cd2db7044d073d9f2e325ccdbdac3c9556910af12409041ae8acd6ae73fbe

  • C:\Users\Admin\AppData\Roaming\Massive\win64.exe

    Filesize

    1.9MB

    MD5

    c6057d2b61be59e1495e001637fadb3d

    SHA1

    e35d65f9dab12340a14512a6174371a547386e41

    SHA256

    1b48c20c649d7e5876bcbe632bc45c75718a9ca75f0161c1da4d223fe06a6b84

    SHA512

    6d38b061600ecf9c529a816bdf00396d3d33ea670443ae956cb5b6bbe9f98efeb5f7ba1142d8b83a7e26c4454aba57e57967aa64b9d6cded381a113bddbcff43

  • C:\Users\Admin\AppData\Roaming\Massive\win64.exe

    Filesize

    1.9MB

    MD5

    c6057d2b61be59e1495e001637fadb3d

    SHA1

    e35d65f9dab12340a14512a6174371a547386e41

    SHA256

    1b48c20c649d7e5876bcbe632bc45c75718a9ca75f0161c1da4d223fe06a6b84

    SHA512

    6d38b061600ecf9c529a816bdf00396d3d33ea670443ae956cb5b6bbe9f98efeb5f7ba1142d8b83a7e26c4454aba57e57967aa64b9d6cded381a113bddbcff43

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Local\Temp\Kucnax_winupdate.exe

    Filesize

    191KB

    MD5

    e74bfa2dabe8eaeb45fcba277e5a34c7

    SHA1

    6c96a334026517dbf4f055c7f0827d9d00aba289

    SHA256

    19255f182cbb7e9293b3a1604085085b93f3c5f56a4aeaf10dc33293d56fd62d

    SHA512

    1a6da7113dda490d133b43de92ab44f625407ae5861417a57b8d8f88eb0c938c172f6f1bc9212925cd4e61c7e38658fa771f63ebb7be940e1c8747c42a6e51f8

  • \Users\Admin\AppData\Roaming\Massive\win64.exe

    Filesize

    1.9MB

    MD5

    c6057d2b61be59e1495e001637fadb3d

    SHA1

    e35d65f9dab12340a14512a6174371a547386e41

    SHA256

    1b48c20c649d7e5876bcbe632bc45c75718a9ca75f0161c1da4d223fe06a6b84

    SHA512

    6d38b061600ecf9c529a816bdf00396d3d33ea670443ae956cb5b6bbe9f98efeb5f7ba1142d8b83a7e26c4454aba57e57967aa64b9d6cded381a113bddbcff43

  • \Users\Admin\AppData\Roaming\Massive\win64.exe

    Filesize

    1.9MB

    MD5

    c6057d2b61be59e1495e001637fadb3d

    SHA1

    e35d65f9dab12340a14512a6174371a547386e41

    SHA256

    1b48c20c649d7e5876bcbe632bc45c75718a9ca75f0161c1da4d223fe06a6b84

    SHA512

    6d38b061600ecf9c529a816bdf00396d3d33ea670443ae956cb5b6bbe9f98efeb5f7ba1142d8b83a7e26c4454aba57e57967aa64b9d6cded381a113bddbcff43

  • memory/816-74-0x0000000002C20000-0x0000000002D90000-memory.dmp

    Filesize

    1.4MB

  • memory/816-77-0x0000000005429000-0x000000000543A000-memory.dmp

    Filesize

    68KB

  • memory/816-73-0x00000000770B0000-0x0000000077230000-memory.dmp

    Filesize

    1.5MB

  • memory/972-97-0x00000000001A0000-0x00000000001A5000-memory.dmp

    Filesize

    20KB

  • memory/972-96-0x00000000770B0000-0x0000000077230000-memory.dmp

    Filesize

    1.5MB

  • memory/1672-78-0x000000006EDB0000-0x000000006F35B000-memory.dmp

    Filesize

    5.7MB

  • memory/1868-54-0x0000000000020000-0x0000000000030000-memory.dmp

    Filesize

    64KB

  • memory/1868-60-0x0000000005679000-0x000000000568A000-memory.dmp

    Filesize

    68KB

  • memory/1868-59-0x0000000005C10000-0x0000000005D6E000-memory.dmp

    Filesize

    1.4MB

  • memory/1868-58-0x0000000000EC0000-0x0000000001030000-memory.dmp

    Filesize

    1.4MB

  • memory/1868-57-0x00000000770B0000-0x0000000077230000-memory.dmp

    Filesize

    1.5MB

  • memory/1868-55-0x0000000075541000-0x0000000075543000-memory.dmp

    Filesize

    8KB