Analysis

  • max time kernel
    152s
  • max time network
    166s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    30/04/2023, 23:27

General

  • Target

    2fc17c5966753c0b6fa31e15399fe8c7adf3f33785dfed3e9a7fae5c9040eaee.exe

  • Size

    313.3MB

  • MD5

    3f4533e8364f96b90d7fcb413fc8b57c

  • SHA1

    cca3ec3606de5b4973e47ca10ad36742fb3e18ab

  • SHA256

    2fc17c5966753c0b6fa31e15399fe8c7adf3f33785dfed3e9a7fae5c9040eaee

  • SHA512

    2027d0d09c928420d8cb54af252cef18c2582c4c0602cf7b49322d82c175d4a8a9687e179b907dfb787028f6e00272f458b768c319510e3b963a41ee1f4ef4db

  • SSDEEP

    98304:+cyNUURBkRBt1lHzdYnhdowc9cDbuHn5cFO:/ymURCzlHzdLK65D

Malware Config

Extracted

Family

lumma

C2

82.118.23.50

Signatures

  • Lumma Stealer

    An infostealer written in C++ first seen in August 2022.

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2fc17c5966753c0b6fa31e15399fe8c7adf3f33785dfed3e9a7fae5c9040eaee.exe
    "C:\Users\Admin\AppData\Local\Temp\2fc17c5966753c0b6fa31e15399fe8c7adf3f33785dfed3e9a7fae5c9040eaee.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1304
    • C:\Windows\SysWOW64\cmd.exe
      /C schtasks /tn \Diagnostic\jtuhoad /create /tr """"C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.exe""" """C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.txt"""" /st 00:03 /f /sc once /du 9900:20 /ri 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2036
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /tn \Diagnostic\jtuhoad /create /tr """"C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.exe""" """C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.txt"""" /st 00:03 /f /sc once /du 9900:20 /ri 1
        3⤵
        • Creates scheduled task(s)
        PID:2044
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --no-first-run --no-default-browser-check --noerrdialogs --disable-crash-reporter --disable-backgrounding-occluded-windows --disable-background-timer-throttling --disable-extensions-http-throttling --disable-renderer-backgrounding --disable-audio-output --silent-launch --restore-last-session --elevated --profile-directory="Default"
    1⤵
    • Enumerates system info in registry
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef6f39758,0x7fef6f39768,0x7fef6f39778
      2⤵
        PID:468
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --noerrdialogs --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1148 --field-trial-handle=1200,i,2505128492053102109,7765766327678647039,131072 /prefetch:2
        2⤵
          PID:984
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --disable-audio-output --noerrdialogs --mojo-platform-channel-handle=1500 --field-trial-handle=1200,i,2505128492053102109,7765766327678647039,131072 /prefetch:8
          2⤵
            PID:1648
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --disable-audio-output --noerrdialogs --mojo-platform-channel-handle=1624 --field-trial-handle=1200,i,2505128492053102109,7765766327678647039,131072 /prefetch:8
            2⤵
              PID:848
          • C:\Windows\system32\taskeng.exe
            taskeng.exe {794FC0C1-2245-4333-878D-8EF1C0497ED1} S-1-5-21-2647223082-2067913677-935928954-1000:BPOQNXYB\Admin:Interactive:[1]
            1⤵
              PID:1160
              • C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.exe
                C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.exe "C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.txt"
                2⤵
                • Executes dropped EXE
                PID:1364

            Network

                  MITRE ATT&CK Enterprise v6

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                  Downloads

                  • C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.exe

                    Filesize

                    872KB

                    MD5

                    c56b5f0201a3b3de53e561fe76912bfd

                    SHA1

                    2a4062e10a5de813f5688221dbeb3f3ff33eb417

                    SHA256

                    237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

                    SHA512

                    195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

                  • C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.exe

                    Filesize

                    872KB

                    MD5

                    c56b5f0201a3b3de53e561fe76912bfd

                    SHA1

                    2a4062e10a5de813f5688221dbeb3f3ff33eb417

                    SHA256

                    237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

                    SHA512

                    195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

                  • C:\Users\Admin\AppData\Roaming\eujotsm\srvtst.txt

                    Filesize

                    132KB

                    MD5

                    86c8d08a436374893e2280e05aec2f26

                    SHA1

                    4c1adde16dea43f2d2d8c3990df3f7737fcc4d81

                    SHA256

                    28beb98431319514c767d415d79bed7f2e1c71a0af8e425133a5185cf66a90f5

                    SHA512

                    fd97e017fd1f2ec15bdeb2a04a9a39df8a2fd8b4a79c6cb3748f535cf5d4e540a343e7bd20b59bbdb958461078d420f81ab76238f865b82732992e6ccab19d96

                  • memory/1304-56-0x0000000000020000-0x0000000000022000-memory.dmp

                    Filesize

                    8KB

                  • memory/1304-57-0x0000000000430000-0x000000000048A000-memory.dmp

                    Filesize

                    360KB

                  • memory/1304-58-0x0000000000200000-0x0000000000269000-memory.dmp

                    Filesize

                    420KB

                  • memory/1304-66-0x0000000000200000-0x0000000000269000-memory.dmp

                    Filesize

                    420KB