b56e025d3efa3a65a6d31daff33d11f8.exe

General
Target

b56e025d3efa3a65a6d31daff33d11f8.exe

Filesize

310KB

Completed

25-11-2021 16:49

Score
10/10
MD5

b56e025d3efa3a65a6d31daff33d11f8

SHA1

6bf85a2da13381521053967cf6de35249eae84b8

SHA256

61743625175cf4def0b55b55f8b5f7193e10de0b2de17236a59e4f5e9b081cf4

Malware Config

Extracted

Family arkei
Botnet Default
C2

http://file-file-host4.com/tratata.php

Signatures 12

Filter: none

Collection
Credential Access
Discovery
  • Arkei

    Description

    Arkei is an infostealer written in C++.

  • Arkei Stealer Payload

    Tags

    Reported IOCs

    resourceyara_rule
    behavioral1/memory/268-57-0x0000000000220000-0x0000000000241000-memory.dmpfamily_arkei
    behavioral1/memory/268-58-0x0000000000400000-0x0000000001C04000-memory.dmpfamily_arkei
  • Downloads MZ/PE file
  • Deletes itself
    cmd.exe

    Reported IOCs

    pidprocess
    1784cmd.exe
  • Loads dropped DLL
    b56e025d3efa3a65a6d31daff33d11f8.exe

    Reported IOCs

    pidprocess
    268b56e025d3efa3a65a6d31daff33d11f8.exe
    268b56e025d3efa3a65a6d31daff33d11f8.exe
    268b56e025d3efa3a65a6d31daff33d11f8.exe
    268b56e025d3efa3a65a6d31daff33d11f8.exe
    268b56e025d3efa3a65a6d31daff33d11f8.exe
  • Reads user/profile data of web browsers

    Description

    Infostealers often target stored browser data, which can include saved credentials etc.

    TTPs

    Data from Local SystemCredentials in Files
  • Accesses cryptocurrency files/wallets, possible credential harvesting

    Tags

    TTPs

    Data from Local SystemCredentials in Files
  • Checks installed software on the system

    Description

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    Tags

    TTPs

    Query Registry
  • Enumerates physical storage devices

    Description

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

    TTPs

    System Information Discovery
  • Checks processor information in registry
    b56e025d3efa3a65a6d31daff33d11f8.exe

    Description

    Processor information is often read in order to detect sandboxing environments.

    TTPs

    Query RegistrySystem Information Discovery

    Reported IOCs

    descriptioniocprocess
    Key opened\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0b56e025d3efa3a65a6d31daff33d11f8.exe
    Key value queried\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameStringb56e025d3efa3a65a6d31daff33d11f8.exe
  • Delays execution with timeout.exe
    timeout.exe

    Tags

    Reported IOCs

    pidprocess
    1384timeout.exe
  • Suspicious use of WriteProcessMemory
    b56e025d3efa3a65a6d31daff33d11f8.execmd.exe

    Reported IOCs

    descriptionpidprocesstarget process
    PID 268 wrote to memory of 1784268b56e025d3efa3a65a6d31daff33d11f8.execmd.exe
    PID 268 wrote to memory of 1784268b56e025d3efa3a65a6d31daff33d11f8.execmd.exe
    PID 268 wrote to memory of 1784268b56e025d3efa3a65a6d31daff33d11f8.execmd.exe
    PID 268 wrote to memory of 1784268b56e025d3efa3a65a6d31daff33d11f8.execmd.exe
    PID 1784 wrote to memory of 13841784cmd.exetimeout.exe
    PID 1784 wrote to memory of 13841784cmd.exetimeout.exe
    PID 1784 wrote to memory of 13841784cmd.exetimeout.exe
    PID 1784 wrote to memory of 13841784cmd.exetimeout.exe
Processes 3
  • C:\Users\Admin\AppData\Local\Temp\b56e025d3efa3a65a6d31daff33d11f8.exe
    "C:\Users\Admin\AppData\Local\Temp\b56e025d3efa3a65a6d31daff33d11f8.exe"
    Loads dropped DLL
    Checks processor information in registry
    Suspicious use of WriteProcessMemory
    PID:268
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b56e025d3efa3a65a6d31daff33d11f8.exe" & exit
      Deletes itself
      Suspicious use of WriteProcessMemory
      PID:1784
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        Delays execution with timeout.exe
        PID:1384
Network
MITRE ATT&CK Matrix
Command and Control
    Credential Access
    Defense Evasion
      Execution
        Exfiltration
          Impact
            Initial Access
              Lateral Movement
                Persistence
                  Privilege Escalation
                    Replay Monitor
                    00:00 00:00
                    Downloads
                    • \ProgramData\mozglue.dll

                      MD5

                      8f73c08a9660691143661bf7332c3c27

                      SHA1

                      37fa65dd737c50fda710fdbde89e51374d0c204a

                      SHA256

                      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

                      SHA512

                      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

                    • \ProgramData\msvcp140.dll

                      MD5

                      109f0f02fd37c84bfc7508d4227d7ed5

                      SHA1

                      ef7420141bb15ac334d3964082361a460bfdb975

                      SHA256

                      334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

                      SHA512

                      46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

                    • \ProgramData\nss3.dll

                      MD5

                      bfac4e3c5908856ba17d41edcd455a51

                      SHA1

                      8eec7e888767aa9e4cca8ff246eb2aacb9170428

                      SHA256

                      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

                      SHA512

                      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

                    • \ProgramData\sqlite3.dll

                      MD5

                      e477a96c8f2b18d6b5c27bde49c990bf

                      SHA1

                      e980c9bf41330d1e5bd04556db4646a0210f7409

                      SHA256

                      16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

                      SHA512

                      335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

                    • \ProgramData\vcruntime140.dll

                      MD5

                      7587bf9cb4147022cd5681b015183046

                      SHA1

                      f2106306a8f6f0da5afb7fc765cfa0757ad5a628

                      SHA256

                      c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

                      SHA512

                      0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

                    • memory/268-58-0x0000000000400000-0x0000000001C04000-memory.dmp

                    • memory/268-55-0x000000000206B000-0x000000000207F000-memory.dmp

                    • memory/268-56-0x00000000763C1000-0x00000000763C3000-memory.dmp

                    • memory/268-57-0x0000000000220000-0x0000000000241000-memory.dmp

                    • memory/1384-65-0x0000000000000000-mapping.dmp

                    • memory/1784-64-0x0000000000000000-mapping.dmp