Analysis

  • max time kernel
    84s
  • max time network
    211s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    01-06-2024 13:32

General

  • Target

    image_logger.exe

  • Size

    3.1MB

  • MD5

    87548af645ae05d1270e35bab6c7180c

  • SHA1

    186758774e90f0f88537a2223f2919cce582a3b3

  • SHA256

    740eae2194c61a026196e3e6e0ebd629d4b876f8e591fdfd0b662878a86546e0

  • SHA512

    9e36a35d7c96f78401331d47f17a7dc127ffcf254c748f93f1fba41c91aa8886dd305a97d54acf743576659143b534af174adcd0625f10e03b931ba42c234604

  • SSDEEP

    49152:rvXI22SsaNYfdPBldt698dBcjHRpRJ6sbR3LoGdJqTHHB72eh2NT:rvY22SsaNYfdPBldt6+dBcjHRpRJ62Z

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.146:4782

Mutex

34162b02-2762-4654-b588-2cfc3f9d49d6

Attributes
  • encryption_key

    53AE412E3C7FE26F176F4B85B9D37FEA82C46128

  • 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 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\image_logger.exe
    "C:\Users\Admin\AppData\Local\Temp\image_logger.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2904
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:2972
    • C:\Windows\system32\SubDir\Client.exe
      "C:\Windows\system32\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3064
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2864
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2980
    • 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:2180
      • 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,0x7feeeb59758,0x7feeeb59768,0x7feeeb59778
        2⤵
          PID:2012
        • 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=1160 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:2
          2⤵
            PID:1808
          • 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=1492 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:8
            2⤵
              PID:2436
            • 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=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:8
              2⤵
                PID:272
              • 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=2244 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:1
                2⤵
                  PID:1856
                • 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=2252 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:1
                  2⤵
                    PID:2036
                  • 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=1312 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:2
                    2⤵
                      PID:852
                    • 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=1428 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:2
                      2⤵
                        PID:2336
                      • 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=9 --mojo-platform-channel-handle=3344 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:1
                        2⤵
                          PID:2376
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=2140 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:8
                          2⤵
                            PID:2844
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3564 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:8
                            2⤵
                              PID:2928
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3680 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:8
                              2⤵
                                PID:2752
                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=2776 --field-trial-handle=1280,i,15772267752333028783,13172110964619898042,131072 /prefetch:8
                                2⤵
                                  PID:2492
                              • 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:1144

                                Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

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                                Downloads

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

                                  Filesize

                                  264KB

                                  MD5

                                  f50f89a0a91564d0b8a211f8921aa7de

                                  SHA1

                                  112403a17dd69d5b9018b8cede023cb3b54eab7d

                                  SHA256

                                  b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                                  SHA512

                                  bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

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

                                  Filesize

                                  1KB

                                  MD5

                                  ac61cae0dba424d97c9a15a1efef97ae

                                  SHA1

                                  66854ee8d2f2573a18125976f7795d357205ba33

                                  SHA256

                                  839eec5177f2fb41c8fdad4eb024df3b0787273ad19215a25cf09cbff32ef647

                                  SHA512

                                  6632d26af6397d106067a55681b6f95fd6d38bb1f9209ecdef0e982d47d0d5f0074319c24729fdac81632c96e423f8906d61829250f83727443c61df4867cd34

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

                                  Filesize

                                  5KB

                                  MD5

                                  fb25b43b28b5dd02bf69b5e50b156ae9

                                  SHA1

                                  3b1862632ac888ee9d1030d9d147f6df49a76980

                                  SHA256

                                  e39a30bae56df0ce85bb999a2500240c547be7ac09f7ab9c5353b8f64b7140e1

                                  SHA512

                                  8b81a1565746f36008f5ad3af6536c9f11549441a17fa544650bd886110a2c614e75a76297ee444250948c91a43bd43d07cea0961665e06ad3f9573d03ee4e1a

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

                                  Filesize

                                  5KB

                                  MD5

                                  961e42d45f73484e19a47445ec888c93

                                  SHA1

                                  bafb53e99df1e678edfa1b06852b1dfde4699d47

                                  SHA256

                                  6dd9108af7619f5c90966007670c315a80f5570372219e3fb99c2fa778e733b8

                                  SHA512

                                  02c4387d52e2fa749b82a26f41066d7542297fc91776425f81c11b21f7ac74ce3c08205fed5726b00cace94963051a68a6bd1d694631fc310a987fc6f6edf5a3

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp

                                  Filesize

                                  16B

                                  MD5

                                  18e723571b00fb1694a3bad6c78e4054

                                  SHA1

                                  afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                                  SHA256

                                  8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                                  SHA512

                                  43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

                                • C:\Windows\System32\SubDir\Client.exe

                                  Filesize

                                  3.1MB

                                  MD5

                                  87548af645ae05d1270e35bab6c7180c

                                  SHA1

                                  186758774e90f0f88537a2223f2919cce582a3b3

                                  SHA256

                                  740eae2194c61a026196e3e6e0ebd629d4b876f8e591fdfd0b662878a86546e0

                                  SHA512

                                  9e36a35d7c96f78401331d47f17a7dc127ffcf254c748f93f1fba41c91aa8886dd305a97d54acf743576659143b534af174adcd0625f10e03b931ba42c234604

                                • \??\pipe\crashpad_2180_PFSWPPZBIDQSNAOJ

                                  MD5

                                  d41d8cd98f00b204e9800998ecf8427e

                                  SHA1

                                  da39a3ee5e6b4b0d3255bfef95601890afd80709

                                  SHA256

                                  e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                                  SHA512

                                  cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                                • memory/2904-1-0x00000000008E0000-0x0000000000C04000-memory.dmp

                                  Filesize

                                  3.1MB

                                • memory/2904-2-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

                                  Filesize

                                  9.9MB

                                • memory/2904-0-0x000007FEF5353000-0x000007FEF5354000-memory.dmp

                                  Filesize

                                  4KB

                                • memory/2904-8-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

                                  Filesize

                                  9.9MB

                                • memory/3064-9-0x00000000009E0000-0x0000000000D04000-memory.dmp

                                  Filesize

                                  3.1MB

                                • memory/3064-14-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

                                  Filesize

                                  9.9MB

                                • memory/3064-13-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

                                  Filesize

                                  9.9MB

                                • memory/3064-11-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

                                  Filesize

                                  9.9MB

                                • memory/3064-10-0x000007FEF5350000-0x000007FEF5D3C000-memory.dmp

                                  Filesize

                                  9.9MB