Analysis Overview
SHA256
5a0c1f8c117e97ea489329daaf64834554dcabd0263480675c6277b17f70f4f4
Threat Level: Known bad
The file Client.exe was found to be: Known bad.
Malicious Activity Summary
Quasar family
Quasar RAT
Quasar payload
Executes dropped EXE
Enumerates physical storage devices
Unsigned PE
Uses Task Scheduler COM API
Enumerates system info in registry
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SendNotifyMessage
Suspicious use of FindShellTrayWindow
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-11 08:15
Signatures
Quasar family
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-11 08:15
Reported
2024-04-11 08:20
Platform
win7-20240221-en
Max time kernel
51s
Max time network
153s
Command Line
Signatures
Quasar RAT
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS | C:\Program Files\Google\Chrome\Application\chrome.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName | C:\Program Files\Google\Chrome\Application\chrome.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer | C:\Program Files\Google\Chrome\Application\chrome.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\Google\Chrome\Application\chrome.exe | N/A |
| N/A | N/A | C:\Program Files\Google\Chrome\Application\chrome.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
C:\Program Files\Google\Chrome\Application\chrome.exe
"C:\Program Files\Google\Chrome\Application\chrome.exe"
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,0x7fef2429758,0x7fef2429768,0x7fef2429778
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=1136 --field-trial-handle=1228,i,9023685747623355050,18351889635634770188,131072 /prefetch:2
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=1500 --field-trial-handle=1228,i,9023685747623355050,18351889635634770188,131072 /prefetch:8
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=1576 --field-trial-handle=1228,i,9023685747623355050,18351889635634770188,131072 /prefetch:8
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"
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=2300 --field-trial-handle=1228,i,9023685747623355050,18351889635634770188,131072 /prefetch:1
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=2312 --field-trial-handle=1228,i,9023685747623355050,18351889635634770188,131072 /prefetch:1
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=1652 --field-trial-handle=1228,i,9023685747623355050,18351889635634770188,131072 /prefetch:2
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=3216 --field-trial-handle=1228,i,9023685747623355050,18351889635634770188,131072 /prefetch:1
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=3516 --field-trial-handle=1228,i,9023685747623355050,18351889635634770188,131072 /prefetch:8
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=3532 --field-trial-handle=1228,i,9023685747623355050,18351889635634770188,131072 /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | www.google.com | udp |
| GB | 142.250.178.4:443 | www.google.com | tcp |
| US | 8.8.8.8:53 | apis.google.com | udp |
| GB | 216.58.201.110:443 | apis.google.com | tcp |
Files
memory/2280-0-0x0000000001080000-0x00000000013A4000-memory.dmp
memory/2280-1-0x000007FEF5CA0000-0x000007FEF668C000-memory.dmp
memory/2280-2-0x000000001B240000-0x000000001B2C0000-memory.dmp
\??\pipe\crashpad_2532_KNFAZZRZGJLHSZFI
| MD5 | d41d8cd98f00b204e9800998ecf8427e |
| SHA1 | da39a3ee5e6b4b0d3255bfef95601890afd80709 |
| SHA256 | e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 |
| SHA512 | cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e |
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Site Characteristics Database\000007.dbtmp
| MD5 | 18e723571b00fb1694a3bad6c78e4054 |
| SHA1 | afcc0ef32d46fe59e0483f9a3c891d3034d12f32 |
| SHA256 | 8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa |
| SHA512 | 43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2 |
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1
| MD5 | f50f89a0a91564d0b8a211f8921aa7de |
| SHA1 | 112403a17dd69d5b9018b8cede023cb3b54eab7d |
| SHA256 | b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec |
| SHA512 | bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58 |
memory/2280-53-0x000007FEF5CA0000-0x000007FEF668C000-memory.dmp
memory/2280-62-0x000000001B240000-0x000000001B2C0000-memory.dmp
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
| MD5 | fadd6be85fa8e5efd7277bf6af56d8de |
| SHA1 | 5f26b3fb7c3e70d985da2f19efc59f49a5b244ab |
| SHA256 | eff78ee802fba29c7337276a3795f42b8c516e28b8354b9fd9f841db1f912e25 |
| SHA512 | b6a691e983a0abaef71b60fb69019682fea9bb7e47bdfe2d6a55a39aed2e34050b651735ff34b6c239d1240378c8fa7786faf7128ae17220088bd3d853ca39c5 |
C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences
| MD5 | 03eab9c5938784647152249bebc4f756 |
| SHA1 | 77ac81860bfff4a864932ea7aadfd651d7f3818d |
| SHA256 | fd42006b3241d166330d9625d7c1fec6725d9d6259098335832becff2967f4db |
| SHA512 | 60fc15bdd3211b7cfbbad21a0a83b036dd4a62aa0d64840fddb4ea19a9001612300d1fa29286851d402f470f9a63ee31acb2bbbafc55dad2f44a683afb6565e1 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-11 08:15
Reported
2024-04-11 08:20
Platform
win10v2004-20240226-en
Max time kernel
146s
Max time network
154s
Command Line
Signatures
Quasar RAT
Quasar payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SYSTEM32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\SYSTEM32\schtasks.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 5052 wrote to memory of 3496 | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 5052 wrote to memory of 3496 | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 5052 wrote to memory of 3032 | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 5052 wrote to memory of 3032 | N/A | C:\Users\Admin\AppData\Local\Temp\Client.exe | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe |
| PID 3032 wrote to memory of 4764 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
| PID 3032 wrote to memory of 4764 | N/A | C:\Users\Admin\AppData\Roaming\SubDir\Client.exe | C:\Windows\SYSTEM32\schtasks.exe |
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 71.159.190.20.in-addr.arpa | udp |
| N/A | 192.168.178.113:4782 | tcp | |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| N/A | 192.168.178.113:4782 | tcp | |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 17.143.109.104.in-addr.arpa | udp |
| N/A | 192.168.178.113:4782 | tcp | |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| N/A | 192.168.178.113:4782 | tcp | |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| N/A | 192.168.178.113:4782 | tcp | |
| N/A | 192.168.178.113:4782 | tcp | |
| US | 8.8.8.8:53 | 23.173.189.20.in-addr.arpa | udp |
Files
memory/5052-0-0x0000000000E40000-0x0000000001164000-memory.dmp
memory/5052-1-0x00007FF80A380000-0x00007FF80AE41000-memory.dmp
memory/5052-2-0x000000001BE70000-0x000000001BE80000-memory.dmp
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
| MD5 | 06c48b0057d41710e891201feb25782a |
| SHA1 | 1910dedf7da045aa142c2606ee4aa55729241178 |
| SHA256 | 5a0c1f8c117e97ea489329daaf64834554dcabd0263480675c6277b17f70f4f4 |
| SHA512 | 818a46ce9fabaa244d74cffe435ea2e2740bf1e20da49402b3bb1147b994f979cf89e06ee0d3302a8c4fa33d4cfc2dc7f9eeb612125478cef4da9e4899ea9bed |
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client.exe.log
| MD5 | baf55b95da4a601229647f25dad12878 |
| SHA1 | abc16954ebfd213733c4493fc1910164d825cac8 |
| SHA256 | ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924 |
| SHA512 | 24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545 |
memory/5052-10-0x00007FF80A380000-0x00007FF80AE41000-memory.dmp
memory/3032-11-0x00007FF80A380000-0x00007FF80AE41000-memory.dmp
memory/3032-12-0x000000001B1C0000-0x000000001B1D0000-memory.dmp
memory/3032-13-0x000000001BE20000-0x000000001BE70000-memory.dmp
memory/3032-14-0x000000001BF30000-0x000000001BFE2000-memory.dmp
memory/3032-15-0x00007FF80A380000-0x00007FF80AE41000-memory.dmp
memory/3032-16-0x000000001B1C0000-0x000000001B1D0000-memory.dmp