Analysis
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max time kernel
87s -
max time network
132s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
14-01-2022 22:30
Static task
static1
General
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Target
b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe
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Size
316KB
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MD5
a462b89517f859a66881609c088f3f74
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SHA1
0b17d47d74448af3c4554a40467d0489ee2dbd2d
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SHA256
b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2
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SHA512
e1f027491450b75d59ebf9f7299e65de9ea621d8273c2db1973dd77913934d49fae32a73ac5ab65477d1fc20b52bee58a03994358a189122bcfb4dd14094791f
Malware Config
Extracted
arkei
Default
http://file-file-host4.com/tratata.php
Signatures
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Arkei Stealer Payload 2 IoCs
Processes:
resource yara_rule behavioral1/memory/3436-118-0x0000000000400000-0x000000000055F000-memory.dmp family_arkei behavioral1/memory/3436-117-0x00000000006E0000-0x00000000006FC000-memory.dmp family_arkei -
Downloads MZ/PE file
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Loads dropped DLL 3 IoCs
Processes:
b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exepid process 3436 b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe 3436 b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe 3436 b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.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:
b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 2040 timeout.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.execmd.exedescription pid process target process PID 3436 wrote to memory of 952 3436 b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe cmd.exe PID 3436 wrote to memory of 952 3436 b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe cmd.exe PID 3436 wrote to memory of 952 3436 b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe cmd.exe PID 952 wrote to memory of 2040 952 cmd.exe timeout.exe PID 952 wrote to memory of 2040 952 cmd.exe timeout.exe PID 952 wrote to memory of 2040 952 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe"C:\Users\Admin\AppData\Local\Temp\b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:3436 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b2521c053ca4b41e1e6ee8e66a93010fee0a0303f01958272f470667e87bbde2.exe" & exit2⤵
- Suspicious use of WriteProcessMemory
PID:952 -
C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
PID:2040
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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MD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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MD5
bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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MD5
e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c