Analysis

  • max time kernel
    144s
  • max time network
    96s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/06/2024, 20:13

General

  • Target
    Client-bueeeeeilt.exe
  • Size 3.1MB
  • Sample240607-yzq64acf4v
  • SHA256 1896024ae3d7c4103e00ea13b19a601a894ea480414f43c46c133cbb429a3750
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • 147.185.221.19:60312:60312

Mutex
  • 7e12675d-1220-4eb4-be9d-8c8589d2e180

Attributes
  • encryption_key

    1273BC96F067EC4AA34581E6528B50F1DE868338

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Checks computer location settings 2 TTPs 15 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 15 IoCs
  • Suspicious use of FindShellTrayWindow 15 IoCs
  • Suspicious use of SendNotifyMessage 15 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1068
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\e1DjhDqe0Rkx.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5348
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:5940
        • C:\Windows\system32\PING.EXE
          ping -n 10 localhost
          3⤵
          • Runs ping.exe
          PID:4300
        • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
          "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
          3⤵
          • Checks computer location settings
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          • Suspicious use of WriteProcessMemory
          PID:2168
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\0hIVTewzrEOz.bat" "
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:4996
            • C:\Windows\system32\chcp.com
              chcp 65001
              5⤵
                PID:3388
              • C:\Windows\system32\PING.EXE
                ping -n 10 localhost
                5⤵
                • Runs ping.exe
                PID:3380
              • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                5⤵
                • Checks computer location settings
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of FindShellTrayWindow
                • Suspicious use of SendNotifyMessage
                • Suspicious use of WriteProcessMemory
                PID:3776
                • C:\Windows\system32\cmd.exe
                  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\a09thkdepECC.bat" "
                  6⤵
                  • Suspicious use of WriteProcessMemory
                  PID:548
                  • C:\Windows\system32\chcp.com
                    chcp 65001
                    7⤵
                      PID:5744
                    • C:\Windows\system32\PING.EXE
                      ping -n 10 localhost
                      7⤵
                      • Runs ping.exe
                      PID:6016
                    • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                      "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                      7⤵
                      • Checks computer location settings
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of FindShellTrayWindow
                      • Suspicious use of SendNotifyMessage
                      • Suspicious use of WriteProcessMemory
                      PID:1640
                      • C:\Windows\system32\cmd.exe
                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\544qcTExu48D.bat" "
                        8⤵
                        • Suspicious use of WriteProcessMemory
                        PID:3284
                        • C:\Windows\system32\chcp.com
                          chcp 65001
                          9⤵
                            PID:1880
                          • C:\Windows\system32\PING.EXE
                            ping -n 10 localhost
                            9⤵
                            • Runs ping.exe
                            PID:1684
                          • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                            "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                            9⤵
                            • Checks computer location settings
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of FindShellTrayWindow
                            • Suspicious use of SendNotifyMessage
                            • Suspicious use of WriteProcessMemory
                            PID:1516
                            • C:\Windows\system32\cmd.exe
                              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\Omcyxn8cQdv2.bat" "
                              10⤵
                              • Suspicious use of WriteProcessMemory
                              PID:2336
                              • C:\Windows\system32\chcp.com
                                chcp 65001
                                11⤵
                                  PID:4100
                                • C:\Windows\system32\PING.EXE
                                  ping -n 10 localhost
                                  11⤵
                                  • Runs ping.exe
                                  PID:784
                                • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                  "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                  11⤵
                                  • Checks computer location settings
                                  • Suspicious use of AdjustPrivilegeToken
                                  • Suspicious use of FindShellTrayWindow
                                  • Suspicious use of SendNotifyMessage
                                  • Suspicious use of WriteProcessMemory
                                  PID:2912
                                  • C:\Windows\system32\cmd.exe
                                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\fJsC8lXjuyMF.bat" "
                                    12⤵
                                    • Suspicious use of WriteProcessMemory
                                    PID:4720
                                    • C:\Windows\system32\chcp.com
                                      chcp 65001
                                      13⤵
                                        PID:4180
                                      • C:\Windows\system32\PING.EXE
                                        ping -n 10 localhost
                                        13⤵
                                        • Runs ping.exe
                                        PID:3648
                                      • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                        "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                        13⤵
                                        • Checks computer location settings
                                        • Suspicious use of AdjustPrivilegeToken
                                        • Suspicious use of FindShellTrayWindow
                                        • Suspicious use of SendNotifyMessage
                                        • Suspicious use of WriteProcessMemory
                                        PID:4504
                                        • C:\Windows\system32\cmd.exe
                                          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\vWbdav0CDMfG.bat" "
                                          14⤵
                                          • Suspicious use of WriteProcessMemory
                                          PID:5448
                                          • C:\Windows\system32\chcp.com
                                            chcp 65001
                                            15⤵
                                              PID:2124
                                            • C:\Windows\system32\PING.EXE
                                              ping -n 10 localhost
                                              15⤵
                                              • Runs ping.exe
                                              PID:896
                                            • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                              "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                              15⤵
                                              • Checks computer location settings
                                              • Suspicious use of AdjustPrivilegeToken
                                              • Suspicious use of FindShellTrayWindow
                                              • Suspicious use of SendNotifyMessage
                                              • Suspicious use of WriteProcessMemory
                                              PID:5432
                                              • C:\Windows\system32\cmd.exe
                                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\LjElBVQ6oX0u.bat" "
                                                16⤵
                                                • Suspicious use of WriteProcessMemory
                                                PID:2248
                                                • C:\Windows\system32\chcp.com
                                                  chcp 65001
                                                  17⤵
                                                    PID:3856
                                                  • C:\Windows\system32\PING.EXE
                                                    ping -n 10 localhost
                                                    17⤵
                                                    • Runs ping.exe
                                                    PID:2268
                                                  • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                                    "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                                    17⤵
                                                    • Checks computer location settings
                                                    • Suspicious use of AdjustPrivilegeToken
                                                    • Suspicious use of FindShellTrayWindow
                                                    • Suspicious use of SendNotifyMessage
                                                    PID:4176
                                                    • C:\Windows\system32\cmd.exe
                                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\zSz6muBG9H6Z.bat" "
                                                      18⤵
                                                        PID:3024
                                                        • C:\Windows\system32\chcp.com
                                                          chcp 65001
                                                          19⤵
                                                            PID:5400
                                                          • C:\Windows\system32\PING.EXE
                                                            ping -n 10 localhost
                                                            19⤵
                                                            • Runs ping.exe
                                                            PID:6040
                                                          • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                                            "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                                            19⤵
                                                            • Checks computer location settings
                                                            • Suspicious use of AdjustPrivilegeToken
                                                            • Suspicious use of FindShellTrayWindow
                                                            • Suspicious use of SendNotifyMessage
                                                            PID:4628
                                                            • C:\Windows\system32\cmd.exe
                                                              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\vNVipw5me0Qd.bat" "
                                                              20⤵
                                                                PID:1756
                                                                • C:\Windows\system32\chcp.com
                                                                  chcp 65001
                                                                  21⤵
                                                                    PID:4844
                                                                  • C:\Windows\system32\PING.EXE
                                                                    ping -n 10 localhost
                                                                    21⤵
                                                                    • Runs ping.exe
                                                                    PID:2056
                                                                  • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                                                    "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                                                    21⤵
                                                                    • Checks computer location settings
                                                                    • Suspicious use of AdjustPrivilegeToken
                                                                    • Suspicious use of FindShellTrayWindow
                                                                    • Suspicious use of SendNotifyMessage
                                                                    PID:3160
                                                                    • C:\Windows\system32\cmd.exe
                                                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\vj6iDUXjDHKO.bat" "
                                                                      22⤵
                                                                        PID:5196
                                                                        • C:\Windows\system32\chcp.com
                                                                          chcp 65001
                                                                          23⤵
                                                                            PID:5308
                                                                          • C:\Windows\system32\PING.EXE
                                                                            ping -n 10 localhost
                                                                            23⤵
                                                                            • Runs ping.exe
                                                                            PID:4860
                                                                          • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                                                            "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                                                            23⤵
                                                                            • Checks computer location settings
                                                                            • Suspicious use of AdjustPrivilegeToken
                                                                            • Suspicious use of FindShellTrayWindow
                                                                            • Suspicious use of SendNotifyMessage
                                                                            PID:4068
                                                                            • C:\Windows\system32\cmd.exe
                                                                              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\MbyOUPBURvCQ.bat" "
                                                                              24⤵
                                                                                PID:2136
                                                                                • C:\Windows\system32\chcp.com
                                                                                  chcp 65001
                                                                                  25⤵
                                                                                    PID:5536
                                                                                  • C:\Windows\system32\PING.EXE
                                                                                    ping -n 10 localhost
                                                                                    25⤵
                                                                                    • Runs ping.exe
                                                                                    PID:3272
                                                                                  • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                                                                    "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                                                                    25⤵
                                                                                    • Checks computer location settings
                                                                                    • Suspicious use of AdjustPrivilegeToken
                                                                                    • Suspicious use of FindShellTrayWindow
                                                                                    • Suspicious use of SendNotifyMessage
                                                                                    PID:3716
                                                                                    • C:\Windows\system32\cmd.exe
                                                                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\emlz1aQLfgKx.bat" "
                                                                                      26⤵
                                                                                        PID:1476
                                                                                        • C:\Windows\system32\chcp.com
                                                                                          chcp 65001
                                                                                          27⤵
                                                                                            PID:6124
                                                                                          • C:\Windows\system32\PING.EXE
                                                                                            ping -n 10 localhost
                                                                                            27⤵
                                                                                            • Runs ping.exe
                                                                                            PID:4620
                                                                                          • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                                                                            "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                                                                            27⤵
                                                                                            • Checks computer location settings
                                                                                            • Suspicious use of AdjustPrivilegeToken
                                                                                            • Suspicious use of FindShellTrayWindow
                                                                                            • Suspicious use of SendNotifyMessage
                                                                                            PID:5736
                                                                                            • C:\Windows\system32\cmd.exe
                                                                                              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\TAIRK1WDOow8.bat" "
                                                                                              28⤵
                                                                                                PID:4708
                                                                                                • C:\Windows\system32\chcp.com
                                                                                                  chcp 65001
                                                                                                  29⤵
                                                                                                    PID:2400
                                                                                                  • C:\Windows\system32\PING.EXE
                                                                                                    ping -n 10 localhost
                                                                                                    29⤵
                                                                                                    • Runs ping.exe
                                                                                                    PID:2396
                                                                                                  • C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe
                                                                                                    "C:\Users\Admin\AppData\Local\Temp\Client-bueeeeeilt.exe"
                                                                                                    29⤵
                                                                                                    • Checks computer location settings
                                                                                                    • Suspicious use of AdjustPrivilegeToken
                                                                                                    • Suspicious use of FindShellTrayWindow
                                                                                                    • Suspicious use of SendNotifyMessage
                                                                                                    PID:5628
                                                                                                    • C:\Windows\system32\cmd.exe
                                                                                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\6bv8I42ADOq5.bat" "
                                                                                                      30⤵
                                                                                                        PID:5724
                                                                                                        • C:\Windows\system32\chcp.com
                                                                                                          chcp 65001
                                                                                                          31⤵
                                                                                                            PID:5960
                                                                                                          • C:\Windows\system32\PING.EXE
                                                                                                            ping -n 10 localhost
                                                                                                            31⤵
                                                                                                            • Runs ping.exe
                                                                                                            PID:4492

                                              Network

                                                    MITRE ATT&CK Enterprise v15

                                                    Replay Monitor

                                                    Loading Replay Monitor...

                                                    Downloads

                                                    Client-bueeeeeilt.exe.log

                                                    • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client-bueeeeeilt.exe.log
                                                    • Size 2KB
                                                    • SHA256 da740d78ae00b72cb3710d1a1256dc6431550965d20afaa65e5d5860a4748e8c
                                                    • MD5 SHA1 SHA512

                                                    0hIVTewzrEOz.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\0hIVTewzrEOz.bat
                                                    • Size 214B
                                                    • SHA256 eaeafaec197c9d7a04c45128324c7e0c42e7ab3a3ee7f7f34aea90ab697a581f
                                                    • MD5 SHA1 SHA512

                                                    544qcTExu48D.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\544qcTExu48D.bat
                                                    • Size 214B
                                                    • SHA256 420742734f250ce7d60c4684c5bd4e25ede6d5fef0f64971a0d30cbf416dd34f
                                                    • MD5 SHA1 SHA512

                                                    6bv8I42ADOq5.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\6bv8I42ADOq5.bat
                                                    • Size 214B
                                                    • SHA256 5b4fff6bbb3527e721389516cb633d9181361344b1cc659ca56438232a2ef7a9
                                                    • MD5 SHA1 SHA512

                                                    LjElBVQ6oX0u.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\LjElBVQ6oX0u.bat
                                                    • Size 214B
                                                    • SHA256 b91590a528588af4df1425f2897e50fb05ac11ca284a27c83512e0a14872f6c8
                                                    • MD5 SHA1 SHA512

                                                    MbyOUPBURvCQ.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\MbyOUPBURvCQ.bat
                                                    • Size 214B
                                                    • SHA256 8845eb2347ee644f9a369da4ca4de59b4b572eb1eb8854fde7b574df4a80e66d
                                                    • MD5 SHA1 SHA512

                                                    Omcyxn8cQdv2.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\Omcyxn8cQdv2.bat
                                                    • Size 214B
                                                    • SHA256 ac3ccaa627f401b5d12d0a0aab8f7b74fa0b744a421002c1b6ad809c00be8586
                                                    • MD5 SHA1 SHA512

                                                    TAIRK1WDOow8.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\TAIRK1WDOow8.bat
                                                    • Size 214B
                                                    • SHA256 00c80ea97d7509b0ce7177b6bfb51c9836488200ece9a897f9178d97a7b945b4
                                                    • MD5 SHA1 SHA512

                                                    a09thkdepECC.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\a09thkdepECC.bat
                                                    • Size 214B
                                                    • SHA256 40997d140c9181bdfb60d6d9c63e3dac4cb7bcd072c67d590cd73c97a0ddebee
                                                    • MD5 SHA1 SHA512

                                                    e1DjhDqe0Rkx.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\e1DjhDqe0Rkx.bat
                                                    • Size 214B
                                                    • SHA256 c051366f039f4332123d131fd1282fd946349f3288c32b01034a76dd8ab6ee6f
                                                    • MD5 SHA1 SHA512

                                                    emlz1aQLfgKx.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\emlz1aQLfgKx.bat
                                                    • Size 214B
                                                    • SHA256 264b67f93e21db44bedba28b6d5b501a08b425206522949bf73cc41ae7b94b4d
                                                    • MD5 SHA1 SHA512

                                                    fJsC8lXjuyMF.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\fJsC8lXjuyMF.bat
                                                    • Size 214B
                                                    • SHA256 48f41d961d47fdc718ddeaca8c072e8efc2604542ea9f4cf60b9a47203f43c9f
                                                    • MD5 SHA1 SHA512

                                                    vNVipw5me0Qd.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\vNVipw5me0Qd.bat
                                                    • Size 214B
                                                    • SHA256 ed7b18a53f26d2b62ccfc88bb1b8148cf3c3c69ddd74084d9118358ac1cfb0f1
                                                    • MD5 SHA1 SHA512

                                                    vWbdav0CDMfG.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\vWbdav0CDMfG.bat
                                                    • Size 214B
                                                    • SHA256 e0a53aba556715171e842efb9c45a454e187cd3b775de6f417fa6135906063df
                                                    • MD5 SHA1 SHA512

                                                    vj6iDUXjDHKO.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\vj6iDUXjDHKO.bat
                                                    • Size 214B
                                                    • SHA256 2b81aa153347c6e8d56ae13c4afb95650936269b17cb34094a9107b31daad457
                                                    • MD5 SHA1 SHA512

                                                    zSz6muBG9H6Z.bat

                                                    • Path C:\Users\Admin\AppData\Local\Temp\zSz6muBG9H6Z.bat
                                                    • Size 214B
                                                    • SHA256 25050c5730201a809c6291d6d257b413df2fce9e298b51c51a54741cd2c87b7a
                                                    • MD5 SHA1 SHA512

                                                    memory/1068-9-0x00007FFAA59E0000-0x00007FFAA64A1000-memory.dmp

                                                    memory/1068-0-0x00007FFAA59E3000-0x00007FFAA59E5000-memory.dmp

                                                    memory/1068-4-0x000000001C230000-0x000000001C2E2000-memory.dmp

                                                    memory/1068-3-0x000000001C120000-0x000000001C170000-memory.dmp

                                                    memory/1068-2-0x00007FFAA59E0000-0x00007FFAA64A1000-memory.dmp

                                                    memory/1068-1-0x0000000000700000-0x0000000000A24000-memory.dmp

                                                    memory/2168-17-0x00007FFAA56C0000-0x00007FFAA6181000-memory.dmp

                                                    memory/2168-12-0x00007FFAA56C0000-0x00007FFAA6181000-memory.dmp

                                                    memory/2168-13-0x00007FFAA56C0000-0x00007FFAA6181000-memory.dmp