Analysis
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max time kernel
108s -
max time network
167s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
28-01-2022 03:57
Static task
static1
General
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Target
1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe
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Size
360KB
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MD5
2a2b76b47d5325efa62d74b75ec30412
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SHA1
68e0f3a5791b4ac8310f2a72a6ecce64530e2982
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SHA256
1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76
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SHA512
77178f91c0bf84ee149cdda1323d31ded7b5e3ce6f1bc3a6232f8f9b8e2a5ea881844c03eb1d785ad41069b3c66be274d4ac188803a52f65f5e4be09385d224f
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 2628 created 3696 2628 WerFault.exe 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe -
Arkei Stealer Payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/3696-131-0x00000000021D0000-0x00000000021EC000-memory.dmp family_arkei behavioral1/memory/3696-132-0x0000000000400000-0x0000000000485000-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:
1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe -
Loads dropped DLL 3 IoCs
Processes:
1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exepid process 3696 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe 3696 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe 3696 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.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 2948 3696 WerFault.exe 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe -
Checks processor information in registry 2 TTPs 5 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exeWerFault.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.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 2188 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\Policies\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\Root WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\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\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates 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\SmartCardRoot\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 Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs 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\Microsoft\SystemCertificates\trust\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates WaaSMedicAgent.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\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 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
WerFault.exepid process 2948 WerFault.exe 2948 WerFault.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
WerFault.exedescription pid process Token: SeRestorePrivilege 2948 WerFault.exe Token: SeBackupPrivilege 2948 WerFault.exe Token: SeBackupPrivilege 2948 WerFault.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.execmd.exeWerFault.exedescription pid process target process PID 3696 wrote to memory of 2764 3696 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe cmd.exe PID 3696 wrote to memory of 2764 3696 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe cmd.exe PID 3696 wrote to memory of 2764 3696 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe cmd.exe PID 2764 wrote to memory of 2188 2764 cmd.exe timeout.exe PID 2764 wrote to memory of 2188 2764 cmd.exe timeout.exe PID 2764 wrote to memory of 2188 2764 cmd.exe timeout.exe PID 2628 wrote to memory of 3696 2628 WerFault.exe 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe PID 2628 wrote to memory of 3696 2628 WerFault.exe 1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.exe"C:\Users\Admin\AppData\Local\Temp\1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.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\1e7170d4ef913622cbda1928f911e2b6c47d11ad657e0fe80ceeaf1ff86b9b76.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 3696 -s 13922⤵
- 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 5faa45c40a2e9760df28bbc59e7a1290 u3pCchQsYkujnCz7FYwSeA.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 3696 -ip 36961⤵
- 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/3696-130-0x0000000000560000-0x000000000058C000-memory.dmpFilesize
176KB
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memory/3696-131-0x00000000021D0000-0x00000000021EC000-memory.dmpFilesize
112KB
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memory/3696-132-0x0000000000400000-0x0000000000485000-memory.dmpFilesize
532KB