Analysis
-
max time kernel
143s -
max time network
148s -
platform
windows7_x64 -
resource
win7-en-20210920 -
submitted
26-09-2021 15:01
Static task
static1
Behavioral task
behavioral1
Sample
E442.exe
Resource
win7-en-20210920
General
-
Target
E442.exe
-
Size
292KB
-
MD5
4bb4625eefca3f9dfa7ceb06e2ed0acf
-
SHA1
17eef61253fb891fefe31852db649c328e718c1f
-
SHA256
4bf0b22a3a3a941e5e656212af53bdacd3cc42a104bfdf0a331f3819d82384d5
-
SHA512
d2893a37226007207c2ad04f2b40e0ec9aa91478fc65792c8f487435d018368b7f85ddd639212cf0b827f5e7c8cfffa1449962a803a18e3efc3c5cfd6c05792b
Malware Config
Signatures
-
Arkei Stealer Payload 1 IoCs
Processes:
resource yara_rule behavioral1/memory/1128-55-0x0000000000400000-0x000000000044D000-memory.dmp family_arkei -
Downloads MZ/PE file
-
Deletes itself 1 IoCs
Processes:
cmd.exepid process 320 cmd.exe -
Loads dropped DLL 5 IoCs
Processes:
E442.exepid process 1128 E442.exe 1128 E442.exe 1128 E442.exe 1128 E442.exe 1128 E442.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
-
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
-
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
E442.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 E442.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString E442.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 876 timeout.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
E442.execmd.exedescription pid process target process PID 1128 wrote to memory of 320 1128 E442.exe cmd.exe PID 1128 wrote to memory of 320 1128 E442.exe cmd.exe PID 1128 wrote to memory of 320 1128 E442.exe cmd.exe PID 1128 wrote to memory of 320 1128 E442.exe cmd.exe PID 320 wrote to memory of 876 320 cmd.exe timeout.exe PID 320 wrote to memory of 876 320 cmd.exe timeout.exe PID 320 wrote to memory of 876 320 cmd.exe timeout.exe PID 320 wrote to memory of 876 320 cmd.exe timeout.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\E442.exe"C:\Users\Admin\AppData\Local\Temp\E442.exe"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\E442.exe" & exit2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
\ProgramData\mozglue.dllMD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
-
\ProgramData\msvcp140.dllMD5
109f0f02fd37c84bfc7508d4227d7ed5
SHA1ef7420141bb15ac334d3964082361a460bfdb975
SHA256334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4
SHA51246eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39
-
\ProgramData\nss3.dllMD5
bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
-
\ProgramData\sqlite3.dllMD5
e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
-
\ProgramData\vcruntime140.dllMD5
7587bf9cb4147022cd5681b015183046
SHA1f2106306a8f6f0da5afb7fc765cfa0757ad5a628
SHA256c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d
SHA5120b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f
-
memory/320-61-0x0000000000000000-mapping.dmp
-
memory/876-62-0x0000000000000000-mapping.dmp
-
memory/1128-53-0x0000000074B41000-0x0000000074B43000-memory.dmpFilesize
8KB
-
memory/1128-54-0x0000000001E20000-0x0000000001E4D000-memory.dmpFilesize
180KB
-
memory/1128-55-0x0000000000400000-0x000000000044D000-memory.dmpFilesize
308KB