Analysis

  • max time kernel
    64s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    02-06-2024 02:17

General

  • Target

    Viber.exe

  • Size

    3.3MB

  • MD5

    9863fe2c29f2deb8b301f8180acdedf1

  • SHA1

    105a2679bdf370905368427b16cb15d79c41a4da

  • SHA256

    2ab4ac728381ffef7b917c6e2f9fd45cdbb753238552484b33990d101f90105d

  • SHA512

    bc4b7f07e9b5679c178287c4bee466425c039e5ef49a9fd7b1af7952f96c5445bcfe254f9c6c2d5acbe8feede1d64a4f9bad81ebcf312ab99f3aa8b32fee3f16

  • SSDEEP

    49152:8vzI22SsaNYfdPBldt698dBcjHdhZe0SMfGvoGddHTHHB72eh2NT:8vM22SsaNYfdPBldt6+dBcjHd3e0GN

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.100.4:4782

Mutex

ff281bf3-1641-40e1-b845-186b77f35b47

Attributes
  • encryption_key

    F8B799D52937CC435CCEC057E69F8914153CFD83

  • 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
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 54 IoCs
  • Suspicious use of FindShellTrayWindow 35 IoCs
  • Suspicious use of SendNotifyMessage 33 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Viber.exe
    "C:\Users\Admin\AppData\Local\Temp\Viber.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1240
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:2484
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2824
    • 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:2648
      • 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,0x7feef109758,0x7feef109768,0x7feef109778
        2⤵
          PID:2712
        • 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=1164 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:2
          2⤵
            PID:2572
          • 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=1524 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:8
            2⤵
              PID:2800
            • 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=1596 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:8
              2⤵
                PID:2756
              • 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=2316 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:1
                2⤵
                  PID:2228
                • 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=2336 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:1
                  2⤵
                    PID:2424
                  • 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=1376 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:2
                    2⤵
                      PID:1828
                    • 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=1468 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:1
                      2⤵
                        PID:2368
                      • 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=3460 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:8
                        2⤵
                          PID:972
                        • 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=3580 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:8
                          2⤵
                            PID:836
                          • 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=3700 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:8
                            2⤵
                              PID:1792
                            • 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=3812 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:8
                              2⤵
                                PID:1728
                              • 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=3688 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:8
                                2⤵
                                  PID:1696
                                • 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=14 --mojo-platform-channel-handle=1068 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:1
                                  2⤵
                                    PID:2548
                                  • 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=15 --mojo-platform-channel-handle=2776 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:1
                                    2⤵
                                      PID:1716
                                    • 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=16 --mojo-platform-channel-handle=3984 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:1
                                      2⤵
                                        PID:1476
                                      • 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=17 --mojo-platform-channel-handle=584 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:1
                                        2⤵
                                          PID:972
                                        • 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=18 --mojo-platform-channel-handle=4008 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:1
                                          2⤵
                                            PID:1236
                                          • 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=19 --mojo-platform-channel-handle=3708 --field-trial-handle=1380,i,2860575912961423915,8116555020593813796,131072 /prefetch:1
                                            2⤵
                                              PID:1824
                                          • 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:572

                                            Network

                                            MITRE ATT&CK Enterprise v15

                                            Replay Monitor

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                                            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\GPUCache\data_1
                                              Filesize

                                              264KB

                                              MD5

                                              f50f89a0a91564d0b8a211f8921aa7de

                                              SHA1

                                              112403a17dd69d5b9018b8cede023cb3b54eab7d

                                              SHA256

                                              b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                                              SHA512

                                              bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

                                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity
                                              Filesize

                                              361B

                                              MD5

                                              1fa15b8d073e14091dd69422c1a39bb2

                                              SHA1

                                              7e84ea3c4c454ad6bc4f54e056448d80237fddf4

                                              SHA256

                                              c4f9d9525b89ecf1e5c0891cd30343e8b27931f12bb7a82a081870bafe111b99

                                              SHA512

                                              16ea2d0e0be5a4b170c4f03efd7f6cfdb25b2c4fcff54216f60c821e3eb58b14445499aa35b465eb24c54780e2a365f0707f09e209a08cf8d3b71f645b284bc4

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

                                              5KB

                                              MD5

                                              9169c0211a85a3be759e7e575cf073e1

                                              SHA1

                                              1a2a52dbb0669f9a4bbf76b0de290b960b5e9f27

                                              SHA256

                                              c8e756c0815c7a44f3ddd1a41d6872c0606cca71efb08adddde89caba0040dca

                                              SHA512

                                              3e618ec20d05bb5927535d83f63e147a15bedaebeaa7477e09cf8770103247af85d17c93d0235fcbca1a6d13a72f689e145cbc444d439b004ccda13c40ffb449

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

                                              5KB

                                              MD5

                                              08a8c6e7353614301501ecdf8d26c909

                                              SHA1

                                              f3c3c2de9e24c1373b63bff6c2a11445b503f996

                                              SHA256

                                              98037baee7210144ba62700ce8dca53a23152a5d84c6bdc7b0a1f04f8ece03c2

                                              SHA512

                                              655385661b557138642d7f75d90ad1cf1668558f01d147a6daa177c3347c08ca4fc5aed010cd979ae7ae96c36e7ce17327fd436f970d21cc4592ef761dfdf103

                                            • 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:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State
                                              Filesize

                                              282KB

                                              MD5

                                              f629a5f3bcbc40ee94a8fd00bf3c211e

                                              SHA1

                                              8bac5787ff90737973b67fcda43894c048c9cc24

                                              SHA256

                                              3390cd6aa13088219a4f3a466dc6bdb29323ff95fdd70cb94762e05c1a1daea8

                                              SHA512

                                              4f8aca0a3fa3d50fd21f695abd37d72889f873505741fe0d522fefd8622df7343bcb034b3448c448f2e6fdf81c36d576f272fa120d3d4c06da1619e251348d8d

                                            • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                              Filesize

                                              3.3MB

                                              MD5

                                              9863fe2c29f2deb8b301f8180acdedf1

                                              SHA1

                                              105a2679bdf370905368427b16cb15d79c41a4da

                                              SHA256

                                              2ab4ac728381ffef7b917c6e2f9fd45cdbb753238552484b33990d101f90105d

                                              SHA512

                                              bc4b7f07e9b5679c178287c4bee466425c039e5ef49a9fd7b1af7952f96c5445bcfe254f9c6c2d5acbe8feede1d64a4f9bad81ebcf312ab99f3aa8b32fee3f16

                                            • \??\PIPE\samr
                                              MD5

                                              d41d8cd98f00b204e9800998ecf8427e

                                              SHA1

                                              da39a3ee5e6b4b0d3255bfef95601890afd80709

                                              SHA256

                                              e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                                              SHA512

                                              cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                                            • memory/1240-8-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp
                                              Filesize

                                              9.9MB

                                            • memory/1240-0-0x000007FEF56B3000-0x000007FEF56B4000-memory.dmp
                                              Filesize

                                              4KB

                                            • memory/1240-2-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp
                                              Filesize

                                              9.9MB

                                            • memory/1240-1-0x0000000000DB0000-0x000000000110A000-memory.dmp
                                              Filesize

                                              3.4MB

                                            • memory/2484-9-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp
                                              Filesize

                                              9.9MB

                                            • memory/2484-12-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp
                                              Filesize

                                              9.9MB

                                            • memory/2484-11-0x000007FEF56B0000-0x000007FEF609C000-memory.dmp
                                              Filesize

                                              9.9MB

                                            • memory/2484-10-0x00000000003E0000-0x000000000073A000-memory.dmp
                                              Filesize

                                              3.4MB