Analysis

  • max time kernel
    147s
  • max time network
    195s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    26-06-2021 18:29

General

  • Target

    kronos.exe

  • Size

    429KB

  • MD5

    de9ab737905e09b69b28dc0999d08894

  • SHA1

    9278a2cf97b5bd635d9950cab38afc3f82558506

  • SHA256

    ffc1cfe4cfa36477ead629bd1a2c6ffb266502c3261b85de431137da411320a8

  • SHA512

    698c4d119dd35fe3dc62e824d175374f9eb41925df7931b78cd33b96137b7d99f76f19889f4ca716bc3719b77d089b1772001028410473fb09d64462c08c680e

Malware Config

Signatures

  • 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 4 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 43 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: MapViewOfSection 28 IoCs
  • Suspicious use of AdjustPrivilegeToken 40 IoCs
  • Suspicious use of FindShellTrayWindow 5 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:1264
      • C:\Users\Admin\AppData\Local\Temp\kronos.exe
        "C:\Users\Admin\AppData\Local\Temp\kronos.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1668
        • C:\Users\Admin\AppData\Local\Temp\kronos.exe
          "C:\Users\Admin\AppData\Local\Temp\kronos.exe"
          3⤵
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of WriteProcessMemory
          PID:1680
          • C:\Windows\SysWOW64\svchost.exe
            "C:\Windows\system32\svchost.exe"
            4⤵
            • Adds Run key to start application
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:684
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --disable-http2
        2⤵
        • Enumerates system info in registry
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of WriteProcessMemory
        PID:1944
        • 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=89.0.4389.114 --initial-client-data=0x108,0x10c,0x110,0xdc,0x114,0x7fef6394f50,0x7fef6394f60,0x7fef6394f70
          3⤵
            PID:1080
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1136 /prefetch:2
            3⤵
              PID:1696
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --service-sandbox-type=network --disable-http2 --mojo-platform-channel-handle=1264 /prefetch:8
              3⤵
                PID:332
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --service-sandbox-type=utility --disable-http2 --mojo-platform-channel-handle=1576 /prefetch:8
                3⤵
                  PID:1468
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2040 /prefetch:1
                  3⤵
                    PID:712
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2052 /prefetch:1
                    3⤵
                      PID:596
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --extension-process --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2424 /prefetch:1
                      3⤵
                        PID:2064
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --extension-process --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=9 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2584 /prefetch:1
                        3⤵
                          PID:2108
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --extension-process --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2540 /prefetch:1
                          3⤵
                            PID:2092
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --extension-process --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2600 /prefetch:1
                            3⤵
                              PID:2236
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --service-sandbox-type=utility --disable-http2 --mojo-platform-channel-handle=3508 /prefetch:8
                              3⤵
                                PID:2636
                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --use-gl=swiftshader-webgl --mojo-platform-channel-handle=1152 /prefetch:2
                                3⤵
                                  PID:2816
                                • C:\Program Files\Google\Chrome\Application\chrome.exe
                                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=1124,10101104992218713556,7661174643477278575,131072 --lang=en-US --service-sandbox-type=utility --disable-http2 --mojo-platform-channel-handle=3036 /prefetch:8
                                  3⤵
                                    PID:2972
                              • C:\Windows\system32\DllHost.exe
                                C:\Windows\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}
                                1⤵
                                  PID:1924
                                • C:\Windows\system32\DllHost.exe
                                  C:\Windows\system32\DllHost.exe /Processid:{AB8902B4-09CA-4BB6-B78D-A8F59079A8D5}
                                  1⤵
                                    PID:2304

                                  Network

                                  MITRE ATT&CK Enterprise v6

                                  Replay Monitor

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                                  Downloads

                                  • memory/260-73-0x0000000000190000-0x0000000000195000-memory.dmp

                                    Filesize

                                    20KB

                                  • memory/332-128-0x000007FEFC940000-0x000007FEFC947000-memory.dmp

                                    Filesize

                                    28KB

                                  • memory/332-125-0x00000000000F0000-0x000000000010C000-memory.dmp

                                    Filesize

                                    112KB

                                  • memory/684-72-0x0000000000150000-0x0000000000155000-memory.dmp

                                    Filesize

                                    20KB

                                  • memory/684-96-0x0000000000BE0000-0x0000000000DA4000-memory.dmp

                                    Filesize

                                    1.8MB

                                  • memory/684-71-0x0000000000FD0000-0x0000000000FD8000-memory.dmp

                                    Filesize

                                    32KB

                                  • memory/1080-102-0x00000000008F0000-0x000000000090C000-memory.dmp

                                    Filesize

                                    112KB

                                  • memory/1468-108-0x0000000077520000-0x0000000077521000-memory.dmp

                                    Filesize

                                    4KB

                                  • memory/1668-65-0x0000000000A86000-0x0000000000A87000-memory.dmp

                                    Filesize

                                    4KB

                                  • memory/1668-59-0x00000000753B1000-0x00000000753B3000-memory.dmp

                                    Filesize

                                    8KB

                                  • memory/1668-60-0x0000000000A70000-0x0000000000A71000-memory.dmp

                                    Filesize

                                    4KB

                                  • memory/1668-64-0x0000000000A75000-0x0000000000A86000-memory.dmp

                                    Filesize

                                    68KB

                                  • memory/1680-70-0x0000000000A50000-0x0000000000A51000-memory.dmp

                                    Filesize

                                    4KB

                                  • memory/1680-61-0x0000000000400000-0x0000000000450000-memory.dmp

                                    Filesize

                                    320KB

                                  • memory/1680-66-0x0000000000400000-0x0000000000450000-memory.dmp

                                    Filesize

                                    320KB

                                  • memory/1924-98-0x0000000000150000-0x0000000000155000-memory.dmp

                                    Filesize

                                    20KB

                                  • memory/1944-99-0x0000000000060000-0x000000000007C000-memory.dmp

                                    Filesize

                                    112KB

                                  • memory/1944-126-0x00000000030F0000-0x00000000030F1000-memory.dmp

                                    Filesize

                                    4KB

                                  • memory/1944-138-0x000007FEFC940000-0x000007FEFC947000-memory.dmp

                                    Filesize

                                    28KB

                                  • memory/2304-140-0x000007FF6CBA0000-0x000007FF6CBAA000-memory.dmp

                                    Filesize

                                    40KB

                                  • memory/2304-139-0x000007FEF3C00000-0x000007FEF3D43000-memory.dmp

                                    Filesize

                                    1.3MB

                                  • memory/2304-133-0x000007FEFBBF1000-0x000007FEFBBF3000-memory.dmp

                                    Filesize

                                    8KB

                                  • memory/2304-137-0x0000000000050000-0x0000000000055000-memory.dmp

                                    Filesize

                                    20KB