Analysis
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max time kernel
122s -
max time network
126s -
platform
windows7_x64 -
resource
win7-en-20211208 -
submitted
15-01-2022 08:30
Static task
static1
Behavioral task
behavioral1
Sample
bfa2ac832261df46640df025737b8c4a.exe
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
bfa2ac832261df46640df025737b8c4a.exe
Resource
win10v2004-en-20220113
General
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Target
bfa2ac832261df46640df025737b8c4a.exe
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Size
316KB
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MD5
bfa2ac832261df46640df025737b8c4a
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SHA1
d7922ef0cef7cc4f7ce9df47ba4de6c9822f14a9
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SHA256
81bc6e0cf586a808ef3ee9c5ace20622f414853a8606007357104c39f5fa5693
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SHA512
097cd3a632d90ecc95531c467b5460aa48d397887c17838ad17a53b7a1162cf3b78c45e978a030d637aef98fcf50444baf4fbef35c8501f8b6e5885b1f50bea9
Malware Config
Extracted
arkei
Default
http://209.209.115.111/SYiQ6N1zUJ.php
Signatures
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Arkei Stealer Payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/1368-57-0x0000000000400000-0x000000000055F000-memory.dmp family_arkei behavioral1/memory/1368-56-0x0000000000220000-0x000000000023C000-memory.dmp family_arkei -
Downloads MZ/PE file
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Deletes itself 1 IoCs
Processes:
cmd.exepid process 1832 cmd.exe -
Loads dropped DLL 5 IoCs
Processes:
bfa2ac832261df46640df025737b8c4a.exepid process 1368 bfa2ac832261df46640df025737b8c4a.exe 1368 bfa2ac832261df46640df025737b8c4a.exe 1368 bfa2ac832261df46640df025737b8c4a.exe 1368 bfa2ac832261df46640df025737b8c4a.exe 1368 bfa2ac832261df46640df025737b8c4a.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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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
bfa2ac832261df46640df025737b8c4a.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 bfa2ac832261df46640df025737b8c4a.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString bfa2ac832261df46640df025737b8c4a.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 1768 timeout.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
bfa2ac832261df46640df025737b8c4a.execmd.exedescription pid process target process PID 1368 wrote to memory of 1832 1368 bfa2ac832261df46640df025737b8c4a.exe cmd.exe PID 1368 wrote to memory of 1832 1368 bfa2ac832261df46640df025737b8c4a.exe cmd.exe PID 1368 wrote to memory of 1832 1368 bfa2ac832261df46640df025737b8c4a.exe cmd.exe PID 1368 wrote to memory of 1832 1368 bfa2ac832261df46640df025737b8c4a.exe cmd.exe PID 1832 wrote to memory of 1768 1832 cmd.exe timeout.exe PID 1832 wrote to memory of 1768 1832 cmd.exe timeout.exe PID 1832 wrote to memory of 1768 1832 cmd.exe timeout.exe PID 1832 wrote to memory of 1768 1832 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\bfa2ac832261df46640df025737b8c4a.exe"C:\Users\Admin\AppData\Local\Temp\bfa2ac832261df46640df025737b8c4a.exe"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:1368 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\bfa2ac832261df46640df025737b8c4a.exe" & exit2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:1832 -
C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
PID:1768
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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\ProgramData\mozglue.dllMD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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\ProgramData\msvcp140.dllMD5
109f0f02fd37c84bfc7508d4227d7ed5
SHA1ef7420141bb15ac334d3964082361a460bfdb975
SHA256334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4
SHA51246eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39
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\ProgramData\nss3.dllMD5
bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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\ProgramData\sqlite3.dllMD5
e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
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\ProgramData\vcruntime140.dllMD5
7587bf9cb4147022cd5681b015183046
SHA1f2106306a8f6f0da5afb7fc765cfa0757ad5a628
SHA256c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d
SHA5120b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f
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memory/1368-55-0x000000000067B000-0x000000000068C000-memory.dmpFilesize
68KB
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memory/1368-57-0x0000000000400000-0x000000000055F000-memory.dmpFilesize
1.4MB
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memory/1368-56-0x0000000000220000-0x000000000023C000-memory.dmpFilesize
112KB
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memory/1368-58-0x0000000076371000-0x0000000076373000-memory.dmpFilesize
8KB
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memory/1768-65-0x0000000000000000-mapping.dmp
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memory/1832-64-0x0000000000000000-mapping.dmp