Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-01-2023 21:23

General

  • Target

    GxMBK.exe

  • Size

    1.6MB

  • MD5

    049b7a8f84d8c8e7932bfc6e97362c30

  • SHA1

    f3d85b5214062a92ecacd0a65e02593e44ab188a

  • SHA256

    2716cfd0d3479d42e903bd0c835b91fd5918a02fb63bdc1b52f73921bf4b307a

  • SHA512

    eb0c58f723a9c6a2d3d29b10f89538845cfbdaa2d4579de4238a0753050154dacc7832cc20f858b757fd6a2e491b5f775262f670309b7691437910c59a106924

  • SSDEEP

    24576:bYO8wJFOtz7uuqEP+1MoIpgpgi2esTTPfQHSvMYdihbjct3sP8ZS3pdWMhLaw:koqAI4sTTP4smZ58wl

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:7000

Mutex

TU53fgvTBLouBDSy

Attributes
  • install_file

    USB.exe

aes.plain

Signatures

  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Detected potential entity reuse from brand microsoft.
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files 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 registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\GxMBK.exe
    "C:\Users\Admin\AppData\Local\Temp\GxMBK.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4492
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2176
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument http://go.microsoft.com/fwlink/?prd=11324&pver=4.5&sbp=AppLaunch2&plcid=0x409&o1=SHIM_NOVERSION_FOUND&version=(null)&processName=schtasks.exe&platform=0009&osver=7&isServer=0&shimver=4.0.30319.0
        3⤵
        • Adds Run key to start application
        • Enumerates system info in registry
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of WriteProcessMemory
        PID:2084
        • 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=0xfc,0x100,0x104,0xd8,0x9c,0x7ffa974746f8,0x7ffa97474708,0x7ffa97474718
          4⤵
            PID:2744
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2136 /prefetch:2
            4⤵
              PID:1204
            • 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=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2360 /prefetch:3
              4⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:4188
            • 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=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2656 /prefetch:8
              4⤵
                PID:1368
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --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=3780 /prefetch:1
                4⤵
                  PID:3752
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --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=3788 /prefetch:1
                  4⤵
                    PID:4044
                  • 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=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=5316 /prefetch:8
                    4⤵
                      PID:1876
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5324 /prefetch:1
                      4⤵
                        PID:4636
                      • 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=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=5824 /prefetch:8
                        4⤵
                          PID:3584
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5876 /prefetch:1
                          4⤵
                            PID:4412
                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3508 /prefetch:1
                            4⤵
                              PID:4288
                            • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                              "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5376 /prefetch:8
                              4⤵
                                PID:4692
                              • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe
                                "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe" --configure-user-settings --verbose-logging --system-level --msedge --force-configure-user-settings
                                4⤵
                                • Drops file in Program Files directory
                                PID:2092
                                • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe
                                  "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe" --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Windows\TEMP\MsEdgeCrashpad --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0x220,0x224,0x228,0x1fc,0x22c,0x7ff735ae5460,0x7ff735ae5470,0x7ff735ae5480
                                  5⤵
                                    PID:1328
                                • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                                  "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5376 /prefetch:8
                                  4⤵
                                  • Suspicious behavior: EnumeratesProcesses
                                  PID:4772
                                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=13 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5584 /prefetch:1
                                  4⤵
                                    PID:2692
                                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=14 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4524 /prefetch:1
                                    4⤵
                                      PID:1636
                                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2604 /prefetch:8
                                      4⤵
                                        PID:4244
                                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2984 /prefetch:8
                                        4⤵
                                          PID:4756
                                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1268 /prefetch:8
                                          4⤵
                                            PID:3080
                                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=4356 /prefetch:8
                                            4⤵
                                              PID:3748
                                            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1836 /prefetch:8
                                              4⤵
                                                PID:1776
                                              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=5140 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --gpu-preferences=UAAAAAAAAADoAAAQAAAAAAAAAAAAAAAAAABgAAAEAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=5840 /prefetch:2
                                                4⤵
                                                • Suspicious behavior: EnumeratesProcesses
                                                PID:64
                                              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --field-trial-handle=2100,5681541189671699033,12873982525511144424,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=6076 /prefetch:8
                                                4⤵
                                                  PID:3440
                                              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument http://go.microsoft.com/fwlink/?prd=11324&pver=4.5&sbp=AppLaunch2&plcid=0x409&o1=SHIM_NOVERSION_FOUND&version=(null)&processName=schtasks.exe&platform=0009&osver=7&isServer=0&shimver=4.0.30319.0
                                                3⤵
                                                  PID:2132
                                                  • 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=0xfc,0x100,0x104,0xd8,0x108,0x7ffa974746f8,0x7ffa97474708,0x7ffa97474718
                                                    4⤵
                                                      PID:1560
                                              • C:\Windows\System32\CompPkgSrv.exe
                                                C:\Windows\System32\CompPkgSrv.exe -Embedding
                                                1⤵
                                                  PID:4200

                                                Network

                                                MITRE ATT&CK Matrix ATT&CK v6

                                                Persistence

                                                Registry Run Keys / Startup Folder

                                                1
                                                T1060

                                                Defense Evasion

                                                Modify Registry

                                                1
                                                T1112

                                                Discovery

                                                System Information Discovery

                                                2
                                                T1082

                                                Query Registry

                                                1
                                                T1012

                                                Replay Monitor

                                                Loading Replay Monitor...

                                                Downloads

                                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat
                                                  Filesize

                                                  152B

                                                  MD5

                                                  c71cb7463c49e125cbae14ac265cf18f

                                                  SHA1

                                                  4430c030546d725e7f6e5584f139e012e9214f06

                                                  SHA256

                                                  1eb6d93849a5c52e9b381fc0abd82b401e2d1e5dfbedd48a3cff50e91e758018

                                                  SHA512

                                                  2f1317d23dfe8c39760e51900cfaed49a2ba4675f0904ec033252e037e0eb935e59b4cc0b8c11c4acd7cfbddf0d9d461f5a66504494863c2bb7781aa3c000eed

                                                • \??\pipe\LOCAL\crashpad_2084_CJWHVGLRPKPMVBZX
                                                  MD5

                                                  d41d8cd98f00b204e9800998ecf8427e

                                                  SHA1

                                                  da39a3ee5e6b4b0d3255bfef95601890afd80709

                                                  SHA256

                                                  e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                                                  SHA512

                                                  cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                                                • memory/64-179-0x0000000000000000-mapping.dmp
                                                • memory/1204-140-0x0000000000000000-mapping.dmp
                                                • memory/1328-163-0x0000000000000000-mapping.dmp
                                                • memory/1368-144-0x0000000000000000-mapping.dmp
                                                • memory/1560-160-0x0000000000000000-mapping.dmp
                                                • memory/1636-168-0x0000000000000000-mapping.dmp
                                                • memory/1776-178-0x0000000000000000-mapping.dmp
                                                • memory/1876-150-0x0000000000000000-mapping.dmp
                                                • memory/2084-137-0x0000000000000000-mapping.dmp
                                                • memory/2092-162-0x0000000000000000-mapping.dmp
                                                • memory/2132-159-0x0000000000000000-mapping.dmp
                                                • memory/2176-136-0x0000000000400000-0x0000000000410000-memory.dmp
                                                  Filesize

                                                  64KB

                                                • memory/2176-135-0x0000000000000000-mapping.dmp
                                                • memory/2692-166-0x0000000000000000-mapping.dmp
                                                • memory/2744-138-0x0000000000000000-mapping.dmp
                                                • memory/3080-174-0x0000000000000000-mapping.dmp
                                                • memory/3440-181-0x0000000000000000-mapping.dmp
                                                • memory/3584-154-0x0000000000000000-mapping.dmp
                                                • memory/3748-176-0x0000000000000000-mapping.dmp
                                                • memory/3752-146-0x0000000000000000-mapping.dmp
                                                • memory/4044-148-0x0000000000000000-mapping.dmp
                                                • memory/4188-141-0x0000000000000000-mapping.dmp
                                                • memory/4244-170-0x0000000000000000-mapping.dmp
                                                • memory/4288-158-0x0000000000000000-mapping.dmp
                                                • memory/4412-156-0x0000000000000000-mapping.dmp
                                                • memory/4492-132-0x0000000000A00000-0x0000000000B98000-memory.dmp
                                                  Filesize

                                                  1.6MB

                                                • memory/4492-134-0x0000000005C60000-0x0000000006204000-memory.dmp
                                                  Filesize

                                                  5.6MB

                                                • memory/4492-133-0x0000000005610000-0x00000000056AC000-memory.dmp
                                                  Filesize

                                                  624KB

                                                • memory/4636-152-0x0000000000000000-mapping.dmp
                                                • memory/4756-172-0x0000000000000000-mapping.dmp
                                                • memory/4772-164-0x0000000000000000-mapping.dmp