Analysis

  • max time kernel
    144s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-11-2024 18:01

General

  • Target

    RP.sfx.exe

  • Size

    10.0MB

  • MD5

    e335f71c0f053c393626691bd60a58a4

  • SHA1

    0cc99df70cca24c5f96edf36672ea297fe71043f

  • SHA256

    af0c48ca1ed3431b936d489bf1e8255a5d4182bd6164946bd6179ae3f212d0b1

  • SHA512

    eaa5b09100e133cd7241258255c02be262d3f6061774f9d32424922aaae8fa04d148f665d7c61c6f7ac1f1a23e87994b7bc6b0ba7fdd2fd0fa2d4575ac460195

  • SSDEEP

    196608:uchhf7FHaM6MkwG2ea8oQoidqpcO49UEahKBXSmLnS0rCqs2vm9EGgy:dvfBdPG2QzoY1OgUEPV7r9s2+9bgy

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1162710207558852689/c241__Tv-C5fSE0jsivUVIhYUTy9AQG_2q-Wedc4i61WcTidBFF8dAoQzbri3Cz5u5KI

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • 44Caliber family
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 25 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies registry class 24 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RP.sfx.exe
    "C:\Users\Admin\AppData\Local\Temp\RP.sfx.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2124
    • C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.EXE
      "C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.EXE"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2452
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7Z
      2⤵
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:316
      • C:\Windows\SysWOW64\rundll32.exe
        "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
        3⤵
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:2392
        • C:\Windows\SysWOW64\rundll32.exe
          "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry class
          • Suspicious use of WriteProcessMemory
          PID:824
          • C:\Windows\SysWOW64\rundll32.exe
            "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
            5⤵
            • System Location Discovery: System Language Discovery
            • Modifies registry class
            • Suspicious use of WriteProcessMemory
            PID:1984
            • C:\Windows\SysWOW64\rundll32.exe
              "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
              6⤵
              • System Location Discovery: System Language Discovery
              • Modifies registry class
              • Suspicious use of WriteProcessMemory
              PID:1944
              • C:\Windows\SysWOW64\rundll32.exe
                "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                7⤵
                • System Location Discovery: System Language Discovery
                • Modifies registry class
                • Suspicious use of WriteProcessMemory
                PID:2780
                • C:\Windows\SysWOW64\rundll32.exe
                  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                  8⤵
                  • System Location Discovery: System Language Discovery
                  • Modifies registry class
                  • Suspicious use of WriteProcessMemory
                  PID:2800
                  • C:\Windows\SysWOW64\rundll32.exe
                    "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                    9⤵
                    • System Location Discovery: System Language Discovery
                    • Modifies registry class
                    • Suspicious use of WriteProcessMemory
                    PID:2996
                    • C:\Windows\SysWOW64\rundll32.exe
                      "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                      10⤵
                      • System Location Discovery: System Language Discovery
                      • Modifies registry class
                      PID:2960
                      • C:\Windows\SysWOW64\rundll32.exe
                        "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                        11⤵
                        • System Location Discovery: System Language Discovery
                        • Modifies registry class
                        PID:904
                        • C:\Windows\SysWOW64\rundll32.exe
                          "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                          12⤵
                          • System Location Discovery: System Language Discovery
                          • Modifies registry class
                          PID:1792
                          • C:\Windows\SysWOW64\rundll32.exe
                            "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                            13⤵
                            • System Location Discovery: System Language Discovery
                            • Modifies registry class
                            PID:2816
                            • C:\Windows\SysWOW64\rundll32.exe
                              "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                              14⤵
                              • System Location Discovery: System Language Discovery
                              • Modifies registry class
                              PID:772
                              • C:\Windows\SysWOW64\rundll32.exe
                                "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                15⤵
                                • System Location Discovery: System Language Discovery
                                • Modifies registry class
                                PID:1336
                                • C:\Windows\SysWOW64\rundll32.exe
                                  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                  16⤵
                                  • System Location Discovery: System Language Discovery
                                  • Modifies registry class
                                  PID:1740
                                  • C:\Windows\SysWOW64\rundll32.exe
                                    "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                    17⤵
                                    • System Location Discovery: System Language Discovery
                                    • Modifies registry class
                                    PID:1092
                                    • C:\Windows\SysWOW64\rundll32.exe
                                      "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                      18⤵
                                      • System Location Discovery: System Language Discovery
                                      • Modifies registry class
                                      PID:2412
                                      • C:\Windows\SysWOW64\rundll32.exe
                                        "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                        19⤵
                                        • System Location Discovery: System Language Discovery
                                        • Modifies registry class
                                        PID:2228
                                        • C:\Windows\SysWOW64\rundll32.exe
                                          "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                          20⤵
                                          • System Location Discovery: System Language Discovery
                                          • Modifies registry class
                                          PID:1612
                                          • C:\Windows\SysWOW64\rundll32.exe
                                            "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                            21⤵
                                            • System Location Discovery: System Language Discovery
                                            • Modifies registry class
                                            PID:2408
                                            • C:\Windows\SysWOW64\rundll32.exe
                                              "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                              22⤵
                                              • System Location Discovery: System Language Discovery
                                              • Modifies registry class
                                              PID:2016
                                              • C:\Windows\SysWOW64\rundll32.exe
                                                "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                                23⤵
                                                • System Location Discovery: System Language Discovery
                                                • Modifies registry class
                                                PID:2640
                                                • C:\Windows\SysWOW64\rundll32.exe
                                                  "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                                  24⤵
                                                  • System Location Discovery: System Language Discovery
                                                  • Modifies registry class
                                                  PID:2812
                                                  • C:\Windows\SysWOW64\rundll32.exe
                                                    "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.7z
                                                    25⤵
                                                    • System Location Discovery: System Language Discovery
                                                    • Modifies registry class
                                                    PID:2524

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\44\Process.txt

    Filesize

    398B

    MD5

    8a5e758441cb6c3cb56b446b431baede

    SHA1

    2a88d9049d756c19a1d8afb0baebf18380913a86

    SHA256

    99f69f841090c190d4b291cf23622e97fe4eade49a764bce6ca3e16acae640b7

    SHA512

    ede9d66ae5a1f0f5a312f52dd0ce212a016d07730fe45c000b971abacd8d6c8e0bb1dbc77688062385ac1b7e0c548c1661d167f286c7a6f1a14a3f99f893fb69

  • C:\Users\Admin\AppData\Local\Temp\RESOURCEPACK\RP.exe

    Filesize

    251KB

    MD5

    513286e3e241f1c93556f45db4f8dc23

    SHA1

    32c83261b6ac5663e91664764aab429e6cd424d1

    SHA256

    a46070cb169ed0754c0fb624ad29f59fbc66fb75df9d2b3daefda76bc0d0d893

    SHA512

    890a2d7a72cf9975ebd716ad3c6f05f595afd1218106054c3c33ff1b9d41baf52c0013b8f65d975d372151b3303311f6554cb412fbcbbb0cf01dc8e81109f693

  • memory/2452-20-0x0000000000E70000-0x0000000000EB6000-memory.dmp

    Filesize

    280KB