Analysis
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max time kernel
75s -
max time network
126s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
28-01-2022 00:00
Static task
static1
General
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Target
5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe
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Size
360KB
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MD5
a5952fafe1a71d4b50df9129ffb38eb3
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SHA1
6849c448322ca0aff373fd02cbcbf321879ebb32
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SHA256
5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf
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SHA512
d2a13a2e6f2369099defd03ceada5dd6c8485b20637bd3879e31c5dfb89b05a6dc6c93aad5df3060392a041269ca6df19b230fa4dfdd168891f6a806911d6c05
Malware Config
Extracted
arkei
Default
http://coin-file-file-19.com/tratata.php
Signatures
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Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs
Processes:
WerFault.exedescription pid process target process PID 2068 created 1576 2068 WerFault.exe 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe -
Arkei Stealer Payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/1576-131-0x0000000000720000-0x000000000073C000-memory.dmp family_arkei behavioral1/memory/1576-132-0x0000000000400000-0x0000000000485000-memory.dmp family_arkei -
Downloads MZ/PE file
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Sets service image path in registry 2 TTPs
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe -
Loads dropped DLL 3 IoCs
Processes:
5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exepid process 1576 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe 1576 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe 1576 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe -
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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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Drops file in Windows directory 1 IoCs
Processes:
WerFault.exedescription ioc process File created C:\Windows\AppCompat\Programs\Amcache.hve.tmp WerFault.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 2036 1576 WerFault.exe 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe -
Checks processor information in registry 2 TTPs 5 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
WerFault.exe5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz WerFault.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString WerFault.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 WerFault.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 2112 timeout.exe -
Enumerates system info in registry 2 TTPs 2 IoCs
Processes:
WerFault.exedescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS WerFault.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU WerFault.exe -
Modifies data under HKEY_USERS 41 IoCs
Processes:
WaaSMedicAgent.exedescription ioc process Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs WaaSMedicAgent.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
WerFault.exepid process 2036 WerFault.exe 2036 WerFault.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
WerFault.exedescription pid process Token: SeRestorePrivilege 2036 WerFault.exe Token: SeBackupPrivilege 2036 WerFault.exe Token: SeBackupPrivilege 2036 WerFault.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.execmd.exeWerFault.exedescription pid process target process PID 1576 wrote to memory of 3692 1576 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe cmd.exe PID 1576 wrote to memory of 3692 1576 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe cmd.exe PID 1576 wrote to memory of 3692 1576 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe cmd.exe PID 3692 wrote to memory of 2112 3692 cmd.exe timeout.exe PID 3692 wrote to memory of 2112 3692 cmd.exe timeout.exe PID 3692 wrote to memory of 2112 3692 cmd.exe timeout.exe PID 2068 wrote to memory of 1576 2068 WerFault.exe 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe PID 2068 wrote to memory of 1576 2068 WerFault.exe 5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe"C:\Users\Admin\AppData\Local\Temp\5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe"1⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\5b8d2a337f2de7069910864158169ec56a9b1fc8822f0261777bb2efff988cbf.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1576 -s 14562⤵
- Drops file in Windows directory
- Program crash
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\WaaSMedicAgent.exeC:\Windows\System32\WaaSMedicAgent.exe 58c074793b7ebdecf0a1d42ce3ed8975 GR0me9U24E+ri1QlgabnZA.0.1.0.0.01⤵
- Modifies data under HKEY_USERS
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1576 -ip 15761⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\ProgramData\mozglue.dllMD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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C:\ProgramData\nss3.dllMD5
bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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C:\ProgramData\sqlite3.dllMD5
e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
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memory/1576-130-0x0000000000750000-0x000000000077C000-memory.dmpFilesize
176KB
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memory/1576-131-0x0000000000720000-0x000000000073C000-memory.dmpFilesize
112KB
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memory/1576-132-0x0000000000400000-0x0000000000485000-memory.dmpFilesize
532KB