Analysis
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max time kernel
109s -
max time network
141s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
21-01-2022 01:00
Static task
static1
General
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Target
8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe
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Size
332KB
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MD5
ab2068904f5487d9fe62fa2dc15c31e8
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SHA1
7df609af43cf114b16842ea20752e6ef87600d13
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SHA256
8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1
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SHA512
8e0ac41eec191da896f79682032dd33fe54cd857cfb6fed342d700746bc37ee544aa22046866d72a77527c50703edbe1400afb1cd64082c90089e4f7e068e1fd
Malware Config
Extracted
arkei
Default
http://file-file-host4.com/tratata.php
Signatures
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Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs
Processes:
WerFault.exedescription pid process target process PID 1488 created 1536 1488 WerFault.exe 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe -
Arkei Stealer Payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/1536-131-0x0000000002310000-0x000000000232C000-memory.dmp family_arkei behavioral1/memory/1536-132-0x0000000000400000-0x00000000005DA000-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:
8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe -
Loads dropped DLL 3 IoCs
Processes:
8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exepid process 1536 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe 1536 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe 1536 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.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 2988 1536 WerFault.exe 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe -
Checks processor information in registry 2 TTPs 5 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exeWerFault.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 WerFault.exe 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 -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 4028 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\SystemCertificates\Disallowed\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\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\Disallowed WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs WaaSMedicAgent.exe 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\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\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs 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\Root\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople 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 Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs 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\Root\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs WaaSMedicAgent.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
WerFault.exepid process 2988 WerFault.exe 2988 WerFault.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
WerFault.exedescription pid process Token: SeRestorePrivilege 2988 WerFault.exe Token: SeBackupPrivilege 2988 WerFault.exe Token: SeBackupPrivilege 2988 WerFault.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.execmd.exeWerFault.exedescription pid process target process PID 1536 wrote to memory of 2560 1536 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe cmd.exe PID 1536 wrote to memory of 2560 1536 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe cmd.exe PID 1536 wrote to memory of 2560 1536 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe cmd.exe PID 2560 wrote to memory of 4028 2560 cmd.exe timeout.exe PID 2560 wrote to memory of 4028 2560 cmd.exe timeout.exe PID 2560 wrote to memory of 4028 2560 cmd.exe timeout.exe PID 1488 wrote to memory of 1536 1488 WerFault.exe 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe PID 1488 wrote to memory of 1536 1488 WerFault.exe 8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.exe"C:\Users\Admin\AppData\Local\Temp\8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.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\8812216b294112dce54d3d570146e8bc2704a173c5a8625103a1ce9ed5941ed1.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 1536 -s 9802⤵
- 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 616ba30b1e6061457d5d41d40b4c8be6 2URH+vHQFkGkbEY8QnWCgQ.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 440 -p 1536 -ip 15361⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k wusvcs -p1⤵
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/1536-130-0x0000000000750000-0x000000000077B000-memory.dmpFilesize
172KB
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memory/1536-131-0x0000000002310000-0x000000000232C000-memory.dmpFilesize
112KB
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memory/1536-132-0x0000000000400000-0x00000000005DA000-memory.dmpFilesize
1.9MB