Analysis

  • max time kernel
    161s
  • max time network
    173s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    10/03/2022, 19:29

General

  • Target
    4e2ddac2be7eda1d5b1cc5def04a6b1bde4348710ccc81822800bb2256981b1d.exe
  • Size 3.5MB
  • Sample220310-x7a96sdfdn
  • SHA256 4e2ddac2be7eda1d5b1cc5def04a6b1bde4348710ccc81822800bb2256981b1d
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • socelars

C2
  • http://www.iyiqian.com/

  • http://www.xxhufdc.top/

  • http://www.uefhkice.xyz/

  • http://www.wygexde.xyz/

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://ppcspb.com/upload/

  • http://mebbing.com/upload/

  • http://twcamel.com/upload/

  • http://howdycash.com/upload/

  • http://lahuertasonora.com/upload/

  • http://kpotiques.com/upload/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Socelars

    Socelars is an infostealer targeting browser cookies and credit card credentials.

  • Socelars Payload 2 IoCs
  • Executes dropped EXE 10 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • VMProtect packed file 3 IoCs

    Detects executables packed with VMProtect commercial packer.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

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

  • Looks up geolocation information via web service

    Uses a legitimate geolocation service to find the infected system's geolocation info.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 51 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4e2ddac2be7eda1d5b1cc5def04a6b1bde4348710ccc81822800bb2256981b1d.exe
    "C:\Users\Admin\AppData\Local\Temp\4e2ddac2be7eda1d5b1cc5def04a6b1bde4348710ccc81822800bb2256981b1d.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2800
    • C:\Users\Admin\AppData\Local\Temp\Install.exe
      "C:\Users\Admin\AppData\Local\Temp\Install.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2764
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /c taskkill /f /im chrome.exe
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2144
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /f /im chrome.exe
          4⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:3168
    • C:\Users\Admin\AppData\Local\Temp\KRSetp.exe
      "C:\Users\Admin\AppData\Local\Temp\KRSetp.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2908
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument https://iplogger.org/1wNij7
      2⤵
      • Enumerates system info in registry
      • Modifies registry class
      • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:1724
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0xf8,0xfc,0x100,0xd4,0x104,0x7ffb6bce46f8,0x7ffb6bce4708,0x7ffb6bce4718
        3⤵
          PID:996
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2300,316404444764655415,14169694631357252980,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2308 /prefetch:2
          3⤵
            PID:1228
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2300,316404444764655415,14169694631357252980,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2360 /prefetch:3
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:3644
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2300,316404444764655415,14169694631357252980,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3244 /prefetch:8
            3⤵
              PID:2072
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2300,316404444764655415,14169694631357252980,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3936 /prefetch:1
              3⤵
                PID:4072
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2300,316404444764655415,14169694631357252980,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3616 /prefetch:1
                3⤵
                  PID:3448
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=2300,316404444764655415,14169694631357252980,131072 --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=5264 /prefetch:8
                  3⤵
                    PID:1016
                • C:\Users\Admin\AppData\Local\Temp\Folder.exe
                  "C:\Users\Admin\AppData\Local\Temp\Folder.exe"
                  2⤵
                  • Executes dropped EXE
                  • Checks computer location settings
                  • Modifies registry class
                  PID:1120
                  • C:\Windows\SysWOW64\rUNdlL32.eXe
                    "C:\Windows\system32\rUNdlL32.eXe" "C:\Users\Admin\AppData\Local\Temp\install.dll",init
                    3⤵
                    • Loads dropped DLL
                    PID:1840
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -u -p 1840 -s 184
                      4⤵
                      • Program crash
                      PID:2880
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -u -p 1840 -s 184
                      4⤵
                      • Program crash
                      PID:3044
                • C:\Users\Admin\AppData\Local\Temp\jg3_3uag.exe
                  "C:\Users\Admin\AppData\Local\Temp\jg3_3uag.exe"
                  2⤵
                  • Executes dropped EXE
                  • Checks whether UAC is enabled
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3732
                • C:\Users\Admin\AppData\Local\Temp\pzyh.exe
                  "C:\Users\Admin\AppData\Local\Temp\pzyh.exe"
                  2⤵
                  • Executes dropped EXE
                  • Adds Run key to start application
                  PID:1560
                  • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                    C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                    3⤵
                    • Executes dropped EXE
                    PID:1428
                  • C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe
                    C:\Users\Admin\AppData\Local\Temp\jfiag3g_gg.exe /scookiestxt C:\Users\Admin\AppData\Local\Temp\fj4ghga23_fsa.txt
                    3⤵
                    • Executes dropped EXE
                    • Suspicious behavior: EnumeratesProcesses
                    PID:2164
                • C:\Users\Admin\AppData\Local\Temp\pub2.exe
                  "C:\Users\Admin\AppData\Local\Temp\pub2.exe"
                  2⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  • Checks SCSI registry key(s)
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious behavior: MapViewOfSection
                  PID:3876
                • C:\Users\Admin\AppData\Local\Temp\IDWCH1.exe
                  "C:\Users\Admin\AppData\Local\Temp\IDWCH1.exe"
                  2⤵
                  • Executes dropped EXE
                  PID:1364
                  • C:\Users\Admin\AppData\Local\Temp\is-JR2FI.tmp\IDWCH1.tmp
                    "C:\Users\Admin\AppData\Local\Temp\is-JR2FI.tmp\IDWCH1.tmp" /SL5="$901E8,179430,95744,C:\Users\Admin\AppData\Local\Temp\IDWCH1.exe"
                    3⤵
                    • Executes dropped EXE
                    • Loads dropped DLL
                    PID:3936
              • C:\Windows\System32\CompPkgSrv.exe
                C:\Windows\System32\CompPkgSrv.exe -Embedding
                1⤵
                  PID:1840
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1840 -ip 1840
                  1⤵
                    PID:3860

                  Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

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                        Downloads

                        memory/1364-166-0x0000000000400000-0x000000000041E000-memory.dmp

                        memory/1364-158-0x0000000000400000-0x000000000041E000-memory.dmp

                        memory/2072-161-0x00007FFB78330000-0x00007FFB78331000-memory.dmp

                        memory/2404-185-0x0000000002940000-0x0000000002956000-memory.dmp

                        memory/2908-137-0x00007FFB58930000-0x00007FFB593F1000-memory.dmp

                        memory/2908-138-0x000000001CE30000-0x000000001CE32000-memory.dmp

                        memory/2908-136-0x0000000000C60000-0x0000000000CA0000-memory.dmp

                        memory/3732-177-0x0000000000400000-0x00000000005E2000-memory.dmp

                        memory/3732-224-0x0000000000B30000-0x0000000000B38000-memory.dmp

                        memory/3732-228-0x0000000000660000-0x0000000000668000-memory.dmp

                        memory/3732-227-0x0000000000660000-0x0000000000668000-memory.dmp

                        memory/3732-204-0x0000000003610000-0x0000000003620000-memory.dmp

                        memory/3732-210-0x00000000037B0000-0x00000000037C0000-memory.dmp

                        memory/3732-226-0x0000000000B50000-0x0000000000B58000-memory.dmp

                        memory/3732-225-0x0000000000B30000-0x0000000000B38000-memory.dmp

                        memory/3732-222-0x0000000000640000-0x0000000000648000-memory.dmp

                        memory/3732-223-0x0000000000660000-0x0000000000668000-memory.dmp

                        memory/3876-168-0x0000000000E60000-0x0000000000E69000-memory.dmp

                        memory/3876-155-0x0000000000E9D000-0x0000000000EA6000-memory.dmp

                        memory/3876-176-0x0000000000400000-0x0000000000C05000-memory.dmp

                        memory/3876-167-0x0000000000E9D000-0x0000000000EA6000-memory.dmp

                        memory/3936-180-0x0000000000760000-0x0000000000761000-memory.dmp