Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-05-2024 01:59

General

  • Target

    b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe

  • Size

    539KB

  • MD5

    c05d4bfb1c0e89db58fa981980938b76

  • SHA1

    12801b26c7b68224c8540ad08ad9387110d0fd46

  • SHA256

    b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd

  • SHA512

    926f6d48a44b7b56667e5b74dc3f7cff513f6ae02edd07df0ca2e5bc21690e5cdef77213307d8595a9a4127b582f5fc50aab0b97350e08b7486c33e4ada651c5

  • SSDEEP

    12288:unm5pMGjw5LSk0zWbzGsoYFAY7NvlDmmM:um5GGjw5LSk0zWbzRoYbvlSH

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Controlhost

C2

121.43.158.106:4782

yc01h.11ychos.xyz:4782

Mutex

QSR_MUTEX_GFWuzMTNQOijYUKopR

Attributes
  • encryption_key

    Xym3BhtshKCyrit7obQT8XbWGz4i7Yw4

  • install_name

    Controlhost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Controlhost

  • subdirectory

    Controlhost

Signatures

  • Quasar RAT 4 IoCs

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 1 IoCs
  • Detects executables containing common artifacts observed in infostealers 1 IoCs
  • Checks computer location settings 2 TTPs 4 IoCs

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

  • Looks up external IP address via web service 3 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 4 IoCs
  • Runs ping.exe 1 TTPs 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
    "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4400
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\EHh1Q4esfuPG.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4604
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:3156
        • C:\Windows\SysWOW64\PING.EXE
          ping -n 10 localhost
          3⤵
          • Quasar RAT
          • Runs ping.exe
          PID:2484
        • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
          "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
          3⤵
          • Checks computer location settings
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2468
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\UVRbVt1O94sx.bat" "
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:4412
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              5⤵
                PID:4500
              • C:\Windows\SysWOW64\PING.EXE
                ping -n 10 localhost
                5⤵
                • Runs ping.exe
                PID:1108
              • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
                "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
                5⤵
                • Checks computer location settings
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:452
                • C:\Windows\SysWOW64\cmd.exe
                  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DH6w4DvF07f7.bat" "
                  6⤵
                  • Suspicious use of WriteProcessMemory
                  PID:4576
                  • C:\Windows\SysWOW64\chcp.com
                    chcp 65001
                    7⤵
                      PID:2444
                    • C:\Windows\SysWOW64\PING.EXE
                      ping -n 10 localhost
                      7⤵
                      • Runs ping.exe
                      PID:4556
                    • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
                      "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
                      7⤵
                      • Checks computer location settings
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of SetWindowsHookEx
                      • Suspicious use of WriteProcessMemory
                      PID:1380
                      • C:\Windows\SysWOW64\cmd.exe
                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\sKjbqxzRbT0w.bat" "
                        8⤵
                        • Suspicious use of WriteProcessMemory
                        PID:2064
                        • C:\Windows\SysWOW64\chcp.com
                          chcp 65001
                          9⤵
                            PID:4992
                          • C:\Windows\SysWOW64\PING.EXE
                            ping -n 10 localhost
                            9⤵
                            • Runs ping.exe
                            PID:4444
                          • C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe
                            "C:\Users\Admin\AppData\Local\Temp\b923f253757397be0e1b86c92a0854d0eef612fcc3c99fd5be8f96e309d8d5fd.exe"
                            9⤵
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of SetWindowsHookEx
                            PID:2528
                        • C:\Windows\SysWOW64\WerFault.exe
                          C:\Windows\SysWOW64\WerFault.exe -u -p 1380 -s 2308
                          8⤵
                          • Program crash
                          PID:3836
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -u -p 452 -s 2316
                      6⤵
                      • Program crash
                      PID:1668
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 2468 -s 2088
                  4⤵
                  • Program crash
                  PID:2320
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4400 -s 2116
              2⤵
              • Program crash
              PID:1644
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3772,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=1268 /prefetch:8
            1⤵
              PID:2588
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4400 -ip 4400
              1⤵
                PID:4732
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 2468 -ip 2468
                1⤵
                  PID:3156
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 452 -ip 452
                  1⤵
                    PID:3308
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 1380 -ip 1380
                    1⤵
                      PID:1496

                    Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

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                    Downloads

                    • C:\Users\Admin\AppData\Local\Temp\DH6w4DvF07f7.bat

                      Filesize

                      261B

                      MD5

                      9285bb39cc34c39435f48165ceb668aa

                      SHA1

                      7f7eea270489ce558bc4c8aa5207ba4f90322780

                      SHA256

                      b2b2504f8e06369a84d9d4ffe68dc0838f7198b0d95ce4dc2463c1fbf48c5572

                      SHA512

                      bbeba74c7bd6ecdceed289ca6c727f1152de01356011127b19411caed0dab7d29cf7f3c77b1eade19e55adb46c413ff1a6832889863d81812a6ea8012cc202c6

                    • C:\Users\Admin\AppData\Local\Temp\EHh1Q4esfuPG.bat

                      Filesize

                      261B

                      MD5

                      5156073719ee8d89bb1f9dae1f69d665

                      SHA1

                      d843de8b844ece33ca02a487a968d69cd5ad12fd

                      SHA256

                      bad92167a1161d9bd4eb9a87c55f8ca74b9a0fece7f91f007f09a1a37351f489

                      SHA512

                      a278b23afc497909d61942f8ba743eac7815c3942b61d4549e7b85c04269d4c2cfb9b76aeb95f70a28d76bd516bb63c208db31c9fdecdedeccc2f070ec3ff621

                    • C:\Users\Admin\AppData\Local\Temp\UVRbVt1O94sx.bat

                      Filesize

                      261B

                      MD5

                      b0e70bf44be90f9fddfe7c1943217b00

                      SHA1

                      d9a39368b3402d415c7f3fef19149ab15e2ed403

                      SHA256

                      6b19b9a3e373010accf4cd66906da98bc8a2c9d9b0a5611ddf0df5982c80daf3

                      SHA512

                      8581e00a77ab18b2c97b976265cf317b19f82ec8a51011ffdaaac933aeae49139c4c95c75a6399fd7aefd5663f03874eedf08d5fec46a480e538df4de580dcbb

                    • C:\Users\Admin\AppData\Local\Temp\sKjbqxzRbT0w.bat

                      Filesize

                      261B

                      MD5

                      9e92ca615a3e11cd51c58330f82c35db

                      SHA1

                      7166c2498f91a914f0b6b2304bda349ab8fac1c0

                      SHA256

                      9b86a6f4ff914906de83e819cace55c47f27482cd47153c2d67374e7907f5288

                      SHA512

                      3d872676a7b4fc4ac39b4e78e9eaf8a0f4a848213f2707c94352f654668b6dbdb28e26be576503607380f8715da82ed949441e1997e841f9709b2b7bf938b975

                    • C:\Users\Admin\AppData\Roaming\Logs\05-27-2024

                      Filesize

                      224B

                      MD5

                      e16591a18c3fe3e815e34e769f800474

                      SHA1

                      f91521a294b8864bc7442eadb7dbe5b59592a748

                      SHA256

                      2a6c089e0bc141f993ffa1cffcdcb70703b46a15c9b6277e077181d69183455a

                      SHA512

                      65b555975dbecc2a028bbf75cecc450dbd39ce7d0329c0af7b1aaa684fa74085533347cfaa49d7e7be086366f6a7735daa851e94e4223b43c2a1050c6ccbc7d6

                    • C:\Users\Admin\AppData\Roaming\Logs\05-27-2024

                      Filesize

                      224B

                      MD5

                      3962498ccfc3fc205f9a3c0bd4b138a6

                      SHA1

                      79595531b0a3bf4a2dd4ef83998cfa536e02e082

                      SHA256

                      1f6eaaf1ae9440fafbbdc292178dfdf5fdf31be07c7cb9ee2a5bc9113a14a43b

                      SHA512

                      65e15d306786909b6d84f72a62fe2d91345a3629b73fc29c0c643527bc7a9ce79b02ee666ee77d04fffdd69310d37c04f82c3ac214c86b85c8979332d32995a1

                    • C:\Users\Admin\AppData\Roaming\Logs\05-27-2024

                      Filesize

                      224B

                      MD5

                      ff8c82f07f523e5841fa29bdc135ddf5

                      SHA1

                      18e9adc5191af43d0709a6452c435511b2539d74

                      SHA256

                      039f8261c299769ea234eb54306d2c2137266071caa4a669f9fca946f7bd6b9e

                      SHA512

                      d361bce22a102d583b5ea4787cff955b2d5c5f7e784a196055066c5c20c52a5d11a5bcba7f396895fba2536f651eafd97e1bc4b5f88c23a38c60613aee5738ae

                    • C:\Users\Admin\AppData\Roaming\Logs\05-27-2024

                      Filesize

                      224B

                      MD5

                      c08cfba081e1420da4894cff7a847c4b

                      SHA1

                      dee944abe812697c5a7aa307b12ce8fbc0b561f2

                      SHA256

                      b1e83ed8d369d9110a4bffb93c96c23b33855ab95bfea2290640d39cfacc6f35

                      SHA512

                      0ba8b3070af4b1f5c28e42b6f5c0adb33593f6a2ca62fa9f94769c29d74247b5c7e4cbdc042502fa1e28b818bce3b5216525020523e5a5c9da2dfd66cd900779

                    • memory/2468-29-0x0000000074550000-0x00000000745FB000-memory.dmp

                      Filesize

                      684KB

                    • memory/2468-24-0x0000000074550000-0x00000000745FB000-memory.dmp

                      Filesize

                      684KB

                    • memory/2468-21-0x0000000074550000-0x00000000745FB000-memory.dmp

                      Filesize

                      684KB

                    • memory/4400-6-0x00000000064F0000-0x0000000006502000-memory.dmp

                      Filesize

                      72KB

                    • memory/4400-9-0x0000000006F20000-0x0000000006F70000-memory.dmp

                      Filesize

                      320KB

                    • memory/4400-14-0x000000007458E000-0x000000007458F000-memory.dmp

                      Filesize

                      4KB

                    • memory/4400-15-0x0000000074580000-0x0000000074D30000-memory.dmp

                      Filesize

                      7.7MB

                    • memory/4400-11-0x0000000007320000-0x000000000733A000-memory.dmp

                      Filesize

                      104KB

                    • memory/4400-20-0x0000000074580000-0x0000000074D30000-memory.dmp

                      Filesize

                      7.7MB

                    • memory/4400-10-0x0000000006EF0000-0x0000000006EFA000-memory.dmp

                      Filesize

                      40KB

                    • memory/4400-12-0x0000000007AA0000-0x0000000007B52000-memory.dmp

                      Filesize

                      712KB

                    • memory/4400-8-0x0000000007480000-0x0000000007A98000-memory.dmp

                      Filesize

                      6.1MB

                    • memory/4400-7-0x0000000006B70000-0x0000000006BAC000-memory.dmp

                      Filesize

                      240KB

                    • memory/4400-0-0x000000007458E000-0x000000007458F000-memory.dmp

                      Filesize

                      4KB

                    • memory/4400-5-0x0000000005790000-0x00000000057F6000-memory.dmp

                      Filesize

                      408KB

                    • memory/4400-4-0x0000000074580000-0x0000000074D30000-memory.dmp

                      Filesize

                      7.7MB

                    • memory/4400-3-0x00000000056B0000-0x0000000005742000-memory.dmp

                      Filesize

                      584KB

                    • memory/4400-2-0x0000000005D40000-0x00000000062E4000-memory.dmp

                      Filesize

                      5.6MB

                    • memory/4400-1-0x0000000000C00000-0x0000000000C8C000-memory.dmp

                      Filesize

                      560KB