Resubmissions

21/01/2025, 01:29

250121-bwhzzszjct 10

21/01/2025, 01:26

250121-btnsfsyqfr 10

Analysis

  • max time kernel
    44s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21/01/2025, 01:29

General

  • Target

    ProximaCLient.exe

  • Size

    62KB

  • MD5

    9b58a4fad9c0ddace097997174a11175

  • SHA1

    aad8aaac4ac821a047d68d90bb3266d73e5f6457

  • SHA256

    7bb046bb513f61bb2f038262e0355f239b0daefc081619cb51039bf0cf796033

  • SHA512

    dc27a308b85434804249751deb19eb8ccbcef8c53ca5af6f662b74e41da4763593388c75216ceda66b83b5213a8c55c662d485ae70d9b9abc33bee3e053bb6ba

  • SSDEEP

    1536:Nu2etT/+No2KISb6/N6FbbAb2FftIVZNdCwdAoeWYx:Nu2aT/+No2KISb6/N4bbAUeVZvB8px

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

31.57.243.64:6606

31.57.243.64:7707

31.57.243.64:8808

Mutex

LpF3ngSX2CvP

Attributes
  • delay

    3

  • install

    true

  • install_file

    lasjiiziopjwe.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Asyncrat family
  • Async RAT payload 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ProximaCLient.exe
    "C:\Users\Admin\AppData\Local\Temp\ProximaCLient.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:2080
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "lasjiiziopjwe" /tr '"C:\Users\Admin\AppData\Roaming\lasjiiziopjwe.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2000
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "lasjiiziopjwe" /tr '"C:\Users\Admin\AppData\Roaming\lasjiiziopjwe.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:1536
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpECCF.tmp.bat""
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:1508
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:1852
      • C:\Users\Admin\AppData\Roaming\lasjiiziopjwe.exe
        "C:\Users\Admin\AppData\Roaming\lasjiiziopjwe.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1340
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1472
    • 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,0x7fef5ac9758,0x7fef5ac9768,0x7fef5ac9778
      2⤵
        PID:2796
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1144 --field-trial-handle=1372,i,16235022951872458449,10486949319118570924,131072 /prefetch:2
        2⤵
          PID:2560
        • 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 --mojo-platform-channel-handle=1452 --field-trial-handle=1372,i,16235022951872458449,10486949319118570924,131072 /prefetch:8
          2⤵
            PID:2740
          • 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 --mojo-platform-channel-handle=1592 --field-trial-handle=1372,i,16235022951872458449,10486949319118570924,131072 /prefetch:8
            2⤵
              PID:2556
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2276 --field-trial-handle=1372,i,16235022951872458449,10486949319118570924,131072 /prefetch:1
              2⤵
                PID:1940
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2292 --field-trial-handle=1372,i,16235022951872458449,10486949319118570924,131072 /prefetch:1
                2⤵
                  PID:1200
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1616 --field-trial-handle=1372,i,16235022951872458449,10486949319118570924,131072 /prefetch:2
                  2⤵
                    PID:1156
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=2996 --field-trial-handle=1372,i,16235022951872458449,10486949319118570924,131072 /prefetch:1
                    2⤵
                      PID:2876
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3544 --field-trial-handle=1372,i,16235022951872458449,10486949319118570924,131072 /prefetch:8
                      2⤵
                        PID:2068
                    • C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
                      "C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
                      1⤵
                        PID:320

                      Network

                      MITRE ATT&CK Enterprise v15

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GCM Store\Encryption\000006.dbtmp

                        Filesize

                        16B

                        MD5

                        aefd77f47fb84fae5ea194496b44c67a

                        SHA1

                        dcfbb6a5b8d05662c4858664f81693bb7f803b82

                        SHA256

                        4166bf17b2da789b0d0cc5c74203041d98005f5d4ef88c27e8281e00148cd611

                        SHA512

                        b733d502138821948267a8b27401d7c0751e590e1298fda1428e663ccd02f55d0d2446ff4bc265bdcdc61f952d13c01524a5341bc86afc3c2cde1d8589b2e1c3

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\Network Persistent State

                        Filesize

                        633B

                        MD5

                        a5c2d20c5cd5a33d22851c8d923cce4f

                        SHA1

                        e88fd0e43694309ae3a5d71a667ad3fbb096428b

                        SHA256

                        6dafba0e5c27511c99ad866088719f475c7fbeb5f78a92214c2e9223a200e36d

                        SHA512

                        040826f65d2363da696992ded5af1873869578214a1f20fcbe44a27185be07e81bf0ef40bf10bb0ad326b84b2287ea6093cb80e1fe127d5655b113b53531d995

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                        Filesize

                        5KB

                        MD5

                        deaeb13a0c6b1b19c721bc03ab4a4ad2

                        SHA1

                        085486e897e4d4daee265f171af87110559e536a

                        SHA256

                        0160fd81d5abeb806b330b84aa49fee1b7a42b2c60df7a4ce8e7c49f345ba05e

                        SHA512

                        4898119950e74805ca5ceb03ec85cc6d0f01d0240483392caf7afe8b6b806db7739c8cbbcb632061d3350e7e8f8987f1fe49b0ad398ea78854b459013148e7a1

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                        Filesize

                        5KB

                        MD5

                        add80268ebc54c595dcd3569252578c6

                        SHA1

                        acb537780f044c47bef9869e51e54bdca259286a

                        SHA256

                        1cecb0a4b7df170093f72164be860f128d182637072d264b996206065629d52b

                        SHA512

                        47e063e40b29c4f7915b082461f766abb58cbbbdafb3d73a029af07b67124166f2859b072289326b8ea02f9d085080de8ef10a7d60d02729113681d666fe47f2

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Site Characteristics Database\000007.dbtmp

                        Filesize

                        16B

                        MD5

                        18e723571b00fb1694a3bad6c78e4054

                        SHA1

                        afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                        SHA256

                        8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                        SHA512

                        43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\ShaderCache\data_1

                        Filesize

                        264KB

                        MD5

                        f50f89a0a91564d0b8a211f8921aa7de

                        SHA1

                        112403a17dd69d5b9018b8cede023cb3b54eab7d

                        SHA256

                        b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                        SHA512

                        bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

                      • C:\Users\Admin\AppData\Local\Temp\tmpECCF.tmp.bat

                        Filesize

                        157B

                        MD5

                        78223976fe2c57fa771a7564f6d77ffc

                        SHA1

                        7e95fa5cb59c5dba582b75929471e9100d93f801

                        SHA256

                        2dc45dacd37c4cf766a8cdc90e2dea81fd7e46098539d234816fd6a09265b011

                        SHA512

                        d361b8ed126c299e394d9cba1d017382c112e7d3493b1fd29d37e72d045a8f4d1f61783ef884c587fd161ceb61fe447c18404f5a2e1f14c93ed1778443f552bb

                      • C:\Users\Admin\AppData\Roaming\lasjiiziopjwe.exe

                        Filesize

                        62KB

                        MD5

                        9b58a4fad9c0ddace097997174a11175

                        SHA1

                        aad8aaac4ac821a047d68d90bb3266d73e5f6457

                        SHA256

                        7bb046bb513f61bb2f038262e0355f239b0daefc081619cb51039bf0cf796033

                        SHA512

                        dc27a308b85434804249751deb19eb8ccbcef8c53ca5af6f662b74e41da4763593388c75216ceda66b83b5213a8c55c662d485ae70d9b9abc33bee3e053bb6ba

                      • memory/1340-69-0x0000000000AC0000-0x0000000000AD6000-memory.dmp

                        Filesize

                        88KB

                      • memory/2080-59-0x00000000740E0000-0x00000000747CE000-memory.dmp

                        Filesize

                        6.9MB

                      • memory/2080-0-0x00000000740EE000-0x00000000740EF000-memory.dmp

                        Filesize

                        4KB

                      • memory/2080-50-0x00000000740E0000-0x00000000747CE000-memory.dmp

                        Filesize

                        6.9MB

                      • memory/2080-1-0x0000000000310000-0x0000000000326000-memory.dmp

                        Filesize

                        88KB