Analysis
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max time kernel
71s -
max time network
136s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
19-01-2022 13:55
Static task
static1
General
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Target
35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe
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Size
303KB
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MD5
4dc909191d8c1243cc61696b89fd1fcc
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SHA1
ce9b08f9fe646206a58f515db199653a5ec3e159
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SHA256
35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc
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SHA512
5d1b8b566a350b4dc8680ab7d1bd57410a88cee7f400476122c1bd3b9a9dfdffc14bbea634220ca34461b7944c1ea653dd54cb646ea36f9b5d948bdf8fc5951a
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 1808 created 3912 1808 WerFault.exe 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe -
Arkei Stealer Payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/3912-131-0x00000000008D0000-0x00000000008EC000-memory.dmp family_arkei behavioral1/memory/3912-132-0x0000000000400000-0x0000000000453000-memory.dmp family_arkei -
Downloads MZ/PE file
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-790714498-1549421491-1643397139-1000\Control Panel\International\Geo\Nation 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe -
Loads dropped DLL 3 IoCs
Processes:
35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exepid process 3912 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe 3912 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe 3912 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.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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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 3200 3912 WerFault.exe 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe -
Checks processor information in registry 2 TTPs 5 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exeWerFault.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.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 3652 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 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
WerFault.exepid process 3200 WerFault.exe 3200 WerFault.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
WerFault.exedescription pid process Token: SeRestorePrivilege 3200 WerFault.exe Token: SeBackupPrivilege 3200 WerFault.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.execmd.exeWerFault.exedescription pid process target process PID 3912 wrote to memory of 904 3912 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe cmd.exe PID 3912 wrote to memory of 904 3912 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe cmd.exe PID 3912 wrote to memory of 904 3912 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe cmd.exe PID 904 wrote to memory of 3652 904 cmd.exe timeout.exe PID 904 wrote to memory of 3652 904 cmd.exe timeout.exe PID 904 wrote to memory of 3652 904 cmd.exe timeout.exe PID 1808 wrote to memory of 3912 1808 WerFault.exe 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe PID 1808 wrote to memory of 3912 1808 WerFault.exe 35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.exe"C:\Users\Admin\AppData\Local\Temp\35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.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\35d79a7cfec3f7bcbc52a82b4916e809e9d2594806efd5ccf564d8ecb6c05bdc.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 3912 -s 9202⤵
- 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\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3912 -ip 39121⤵
- 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/3912-130-0x00000000008B0000-0x00000000008C1000-memory.dmpFilesize
68KB
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memory/3912-131-0x00000000008D0000-0x00000000008EC000-memory.dmpFilesize
112KB
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memory/3912-132-0x0000000000400000-0x0000000000453000-memory.dmpFilesize
332KB