Analysis
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max time kernel
121s -
max time network
116s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
20-01-2021 16:25
Static task
static1
Behavioral task
behavioral1
Sample
musikk.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
musikk.exe
Resource
win10v20201028
General
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Target
musikk.exe
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Size
32KB
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MD5
edeae783c7249315102d03a637fd3257
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SHA1
22044ad362803278ec491b260e6d34a6342f17f4
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SHA256
74957e6668e2336b8892c3943890462ee2f7e7782d25b574e8184a3862a1b396
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SHA512
88f3eee886d178455e516326ffaa7ed6f32d234583be4b10738ae7c0097fe1f503e6c9c5f95107f80ec82bfb236f36372c6d5a7c837c0415240c4ffcc329f202
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.privateemail.com - Port:
587 - Username:
sales1@razorwirefecning.com - Password:
Blessings@12345
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Modifies WinLogon for persistence 2 TTPs 1 IoCs
Processes:
musikk.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\musikk.exe\"" musikk.exe -
Turns off Windows Defender SpyNet reporting 2 TTPs
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AgentTesla Payload 6 IoCs
Processes:
resource yara_rule behavioral2/memory/616-10-0x00000000062A0000-0x0000000006304000-memory.dmp family_agenttesla behavioral2/memory/4056-38-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla behavioral2/memory/4056-39-0x000000000043749E-mapping.dmp family_agenttesla behavioral2/memory/3168-42-0x000000000043749E-mapping.dmp family_agenttesla behavioral2/memory/2596-46-0x000000000043749E-mapping.dmp family_agenttesla behavioral2/memory/2804-51-0x000000000043749E-mapping.dmp family_agenttesla -
Looks for VirtualBox Guest Additions in registry 2 TTPs
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Looks for VMWare Tools registry key 2 TTPs
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Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
musikk.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion musikk.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion musikk.exe -
Drops startup file 2 IoCs
Processes:
musikk.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\musikk.exe musikk.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\musikk.exe musikk.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Processes:
musikk.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1" musikk.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Spynet musikk.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Spynet\SpyNetReporting = "0" musikk.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Spynet\SubmitSamplesConsent = "0" musikk.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features musikk.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths musikk.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions musikk.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\musikk.exe = "0" musikk.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\musikk.exe = "0" musikk.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Real-Time Protection musikk.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0" musikk.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
musikk.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\musikk.exe" musikk.exe Set value (str) \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\musikk.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\musikk.exe" musikk.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
Processes:
musikk.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum musikk.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0 musikk.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 16 IoCs
Processes:
musikk.exepid process 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe 616 musikk.exe -
Suspicious use of SetThreadContext 5 IoCs
Processes:
musikk.exedescription pid process target process PID 616 set thread context of 2324 616 musikk.exe musikk.exe PID 616 set thread context of 4056 616 musikk.exe musikk.exe PID 616 set thread context of 3168 616 musikk.exe musikk.exe PID 616 set thread context of 2596 616 musikk.exe musikk.exe PID 616 set thread context of 2804 616 musikk.exe musikk.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 8 2324 WerFault.exe musikk.exe -
Suspicious behavior: EnumeratesProcesses 15 IoCs
Processes:
musikk.exemusikk.exepowershell.exepowershell.exepowershell.exepowershell.exepid process 616 musikk.exe 4056 musikk.exe 4056 musikk.exe 2456 powershell.exe 1968 powershell.exe 968 powershell.exe 3352 powershell.exe 968 powershell.exe 3352 powershell.exe 2456 powershell.exe 1968 powershell.exe 3352 powershell.exe 968 powershell.exe 1968 powershell.exe 2456 powershell.exe -
Suspicious use of AdjustPrivilegeToken 6 IoCs
Processes:
musikk.exemusikk.exepowershell.exepowershell.exepowershell.exepowershell.exedescription pid process Token: SeDebugPrivilege 616 musikk.exe Token: SeDebugPrivilege 4056 musikk.exe Token: SeDebugPrivilege 2456 powershell.exe Token: SeDebugPrivilege 968 powershell.exe Token: SeDebugPrivilege 3352 powershell.exe Token: SeDebugPrivilege 1968 powershell.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
musikk.exepid process 4056 musikk.exe -
Suspicious use of WriteProcessMemory 48 IoCs
Processes:
musikk.exedescription pid process target process PID 616 wrote to memory of 1968 616 musikk.exe powershell.exe PID 616 wrote to memory of 1968 616 musikk.exe powershell.exe PID 616 wrote to memory of 1968 616 musikk.exe powershell.exe PID 616 wrote to memory of 968 616 musikk.exe powershell.exe PID 616 wrote to memory of 968 616 musikk.exe powershell.exe PID 616 wrote to memory of 968 616 musikk.exe powershell.exe PID 616 wrote to memory of 3352 616 musikk.exe powershell.exe PID 616 wrote to memory of 3352 616 musikk.exe powershell.exe PID 616 wrote to memory of 3352 616 musikk.exe powershell.exe PID 616 wrote to memory of 2456 616 musikk.exe powershell.exe PID 616 wrote to memory of 2456 616 musikk.exe powershell.exe PID 616 wrote to memory of 2456 616 musikk.exe powershell.exe PID 616 wrote to memory of 2324 616 musikk.exe musikk.exe PID 616 wrote to memory of 2324 616 musikk.exe musikk.exe PID 616 wrote to memory of 2324 616 musikk.exe musikk.exe PID 616 wrote to memory of 2324 616 musikk.exe musikk.exe PID 616 wrote to memory of 4056 616 musikk.exe musikk.exe PID 616 wrote to memory of 4056 616 musikk.exe musikk.exe PID 616 wrote to memory of 4056 616 musikk.exe musikk.exe PID 616 wrote to memory of 4056 616 musikk.exe musikk.exe PID 616 wrote to memory of 4056 616 musikk.exe musikk.exe PID 616 wrote to memory of 4056 616 musikk.exe musikk.exe PID 616 wrote to memory of 4056 616 musikk.exe musikk.exe PID 616 wrote to memory of 4056 616 musikk.exe musikk.exe PID 616 wrote to memory of 3168 616 musikk.exe musikk.exe PID 616 wrote to memory of 3168 616 musikk.exe musikk.exe PID 616 wrote to memory of 3168 616 musikk.exe musikk.exe PID 616 wrote to memory of 3168 616 musikk.exe musikk.exe PID 616 wrote to memory of 3168 616 musikk.exe musikk.exe PID 616 wrote to memory of 3168 616 musikk.exe musikk.exe PID 616 wrote to memory of 3168 616 musikk.exe musikk.exe PID 616 wrote to memory of 3168 616 musikk.exe musikk.exe PID 616 wrote to memory of 2596 616 musikk.exe musikk.exe PID 616 wrote to memory of 2596 616 musikk.exe musikk.exe PID 616 wrote to memory of 2596 616 musikk.exe musikk.exe PID 616 wrote to memory of 2596 616 musikk.exe musikk.exe PID 616 wrote to memory of 2596 616 musikk.exe musikk.exe PID 616 wrote to memory of 2596 616 musikk.exe musikk.exe PID 616 wrote to memory of 2596 616 musikk.exe musikk.exe PID 616 wrote to memory of 2596 616 musikk.exe musikk.exe PID 616 wrote to memory of 2804 616 musikk.exe musikk.exe PID 616 wrote to memory of 2804 616 musikk.exe musikk.exe PID 616 wrote to memory of 2804 616 musikk.exe musikk.exe PID 616 wrote to memory of 2804 616 musikk.exe musikk.exe PID 616 wrote to memory of 2804 616 musikk.exe musikk.exe PID 616 wrote to memory of 2804 616 musikk.exe musikk.exe PID 616 wrote to memory of 2804 616 musikk.exe musikk.exe PID 616 wrote to memory of 2804 616 musikk.exe musikk.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\musikk.exe"C:\Users\Admin\AppData\Local\Temp\musikk.exe"1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Drops startup file
- Windows security modification
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\musikk.exe" -Force2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\musikk.exe" -Force2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\musikk.exe" -Force2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\musikk.exe" -Force2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\musikk.exe"C:\Users\Admin\AppData\Local\Temp\musikk.exe"2⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 923⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\musikk.exe"C:\Users\Admin\AppData\Local\Temp\musikk.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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C:\Users\Admin\AppData\Local\Temp\musikk.exe"C:\Users\Admin\AppData\Local\Temp\musikk.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\musikk.exe"C:\Users\Admin\AppData\Local\Temp\musikk.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\musikk.exe"C:\Users\Admin\AppData\Local\Temp\musikk.exe"2⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.logMD5
db01a2c1c7e70b2b038edf8ad5ad9826
SHA1540217c647a73bad8d8a79e3a0f3998b5abd199b
SHA256413da361d77055dae7007f82b58b366c8783aa72e0b8fbe41519b940c253b38d
SHA512c76ff57fcee5cdf9fdf3116d4e1dc0cf106867bf19ab474b763e242acf5dca9a7509cb837c35e130c3e056636b4e8a4e135512a978bcd3dd641e20f5bf76c3d6
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveMD5
ac77f1bb1266acf7c5c0722c4924166d
SHA164d512053a986c9d4ee9487bd12d4bbe7c2adbcb
SHA25691156ce12e76402d57c7a45486658f18aa2b3d42af83c6e80e9f1d2f9622c691
SHA512e47af954ab06c2ea77f1ce5627266f8e78f8963a8b2ce58defaced05fb9a14395bcfc09cecb0c7297426282f6332bf9a77d60c721095c3a62970b7ae95102ab1
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveMD5
ac77f1bb1266acf7c5c0722c4924166d
SHA164d512053a986c9d4ee9487bd12d4bbe7c2adbcb
SHA25691156ce12e76402d57c7a45486658f18aa2b3d42af83c6e80e9f1d2f9622c691
SHA512e47af954ab06c2ea77f1ce5627266f8e78f8963a8b2ce58defaced05fb9a14395bcfc09cecb0c7297426282f6332bf9a77d60c721095c3a62970b7ae95102ab1
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C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractiveMD5
8fb30ac551560874104f6ac559413eba
SHA1d715afac2409b9f4274cb7f34ba1b5a5f03c70b4
SHA2561901f2311b168a2fdf55fc0bc365eda5f54815f07dc3b7773a36bf6b334ea13d
SHA512905e71c1271c2f42940da4ea47b2deb7798a7aaab7753374ea4e2a9bf08ec7634b79c975e0d150cd76fbeb545b0235be4082640a74830338d3edfa199d4dd5a2
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memory/8-63-0x0000000004660000-0x0000000004661000-memory.dmpFilesize
4KB
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memory/616-9-0x0000000006290000-0x0000000006291000-memory.dmpFilesize
4KB
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memory/616-59-0x0000000006AD0000-0x0000000006AD1000-memory.dmpFilesize
4KB
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memory/616-2-0x0000000073160000-0x000000007384E000-memory.dmpFilesize
6.9MB
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memory/616-11-0x00000000066A0000-0x00000000066A1000-memory.dmpFilesize
4KB
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memory/616-8-0x0000000006330000-0x0000000006331000-memory.dmpFilesize
4KB
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memory/616-10-0x00000000062A0000-0x0000000006304000-memory.dmpFilesize
400KB
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memory/616-3-0x0000000000A00000-0x0000000000A01000-memory.dmpFilesize
4KB
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memory/616-7-0x0000000005560000-0x0000000005561000-memory.dmpFilesize
4KB
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memory/616-5-0x0000000005790000-0x0000000005791000-memory.dmpFilesize
4KB
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memory/616-6-0x0000000005370000-0x0000000005371000-memory.dmpFilesize
4KB
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memory/968-24-0x0000000007B40000-0x0000000007B41000-memory.dmpFilesize
4KB
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memory/968-16-0x0000000073160000-0x000000007384E000-memory.dmpFilesize
6.9MB
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memory/968-141-0x0000000007503000-0x0000000007504000-memory.dmpFilesize
4KB
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memory/968-13-0x0000000000000000-mapping.dmp
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memory/968-28-0x0000000007500000-0x0000000007501000-memory.dmpFilesize
4KB
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memory/968-136-0x0000000009DA0000-0x0000000009DA1000-memory.dmpFilesize
4KB
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memory/968-126-0x000000007F590000-0x000000007F591000-memory.dmpFilesize
4KB
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memory/968-32-0x0000000007502000-0x0000000007503000-memory.dmpFilesize
4KB
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memory/1968-34-0x0000000006A82000-0x0000000006A83000-memory.dmpFilesize
4KB
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memory/1968-78-0x0000000007720000-0x0000000007721000-memory.dmpFilesize
4KB
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memory/1968-20-0x0000000004490000-0x0000000004491000-memory.dmpFilesize
4KB
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memory/1968-29-0x0000000006A80000-0x0000000006A81000-memory.dmpFilesize
4KB
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memory/1968-129-0x000000007F1D0000-0x000000007F1D1000-memory.dmpFilesize
4KB
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memory/1968-66-0x00000000077B0000-0x00000000077B1000-memory.dmpFilesize
4KB
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memory/1968-12-0x0000000000000000-mapping.dmp
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memory/1968-143-0x0000000006A83000-0x0000000006A84000-memory.dmpFilesize
4KB
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memory/1968-18-0x0000000073160000-0x000000007384E000-memory.dmpFilesize
6.9MB
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memory/2324-37-0x000000000043749E-mapping.dmp
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memory/2456-15-0x0000000000000000-mapping.dmp
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memory/2456-19-0x0000000073160000-0x000000007384E000-memory.dmpFilesize
6.9MB
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memory/2456-116-0x000000007EB50000-0x000000007EB51000-memory.dmpFilesize
4KB
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memory/2456-35-0x00000000064B2000-0x00000000064B3000-memory.dmpFilesize
4KB
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memory/2456-82-0x0000000007910000-0x0000000007911000-memory.dmpFilesize
4KB
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memory/2456-142-0x00000000064B3000-0x00000000064B4000-memory.dmpFilesize
4KB
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memory/2456-61-0x0000000007230000-0x0000000007231000-memory.dmpFilesize
4KB
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memory/2456-144-0x0000000008DC0000-0x0000000008DC1000-memory.dmpFilesize
4KB
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memory/2456-152-0x00000000088F0000-0x00000000088F1000-memory.dmpFilesize
4KB
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memory/2456-30-0x00000000064B0000-0x00000000064B1000-memory.dmpFilesize
4KB
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memory/2596-46-0x000000000043749E-mapping.dmp
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memory/2596-48-0x0000000073160000-0x000000007384E000-memory.dmpFilesize
6.9MB
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memory/2804-51-0x000000000043749E-mapping.dmp
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memory/2804-53-0x0000000073160000-0x000000007384E000-memory.dmpFilesize
6.9MB
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memory/3168-42-0x000000000043749E-mapping.dmp
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memory/3168-44-0x0000000073160000-0x000000007384E000-memory.dmpFilesize
6.9MB
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memory/3352-14-0x0000000000000000-mapping.dmp
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memory/3352-121-0x000000007EBC0000-0x000000007EBC1000-memory.dmpFilesize
4KB
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memory/3352-33-0x00000000044A2000-0x00000000044A3000-memory.dmpFilesize
4KB
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memory/3352-130-0x0000000009030000-0x0000000009031000-memory.dmpFilesize
4KB
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memory/3352-86-0x0000000007F50000-0x0000000007F51000-memory.dmpFilesize
4KB
-
memory/3352-74-0x0000000007800000-0x0000000007801000-memory.dmpFilesize
4KB
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memory/3352-140-0x00000000044A3000-0x00000000044A4000-memory.dmpFilesize
4KB
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memory/3352-97-0x0000000008F00000-0x0000000008F33000-memory.dmpFilesize
204KB
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memory/3352-124-0x0000000008070000-0x0000000008071000-memory.dmpFilesize
4KB
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memory/3352-17-0x0000000073160000-0x000000007384E000-memory.dmpFilesize
6.9MB
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memory/3352-145-0x0000000009100000-0x0000000009101000-memory.dmpFilesize
4KB
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memory/3352-31-0x00000000044A0000-0x00000000044A1000-memory.dmpFilesize
4KB
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memory/4056-60-0x00000000052F0000-0x00000000052F1000-memory.dmpFilesize
4KB
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memory/4056-38-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/4056-39-0x000000000043749E-mapping.dmp
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memory/4056-40-0x0000000073160000-0x000000007384E000-memory.dmpFilesize
6.9MB
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memory/4056-90-0x0000000005710000-0x0000000005711000-memory.dmpFilesize
4KB
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memory/4056-166-0x00000000052F1000-0x00000000052F2000-memory.dmpFilesize
4KB