Analysis

  • max time kernel
    123s
  • max time network
    130s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    25-01-2022 02:41

General

  • Target

    31257a30a3b1bf25d63c86e604e16cae16b725d8460782091c10ecf630059b4a.exe

  • Size

    350KB

  • MD5

    6e5d8904392f52b4ffe088559920915f

  • SHA1

    6f0bc4eb63f72081211c18b5fa2f61d817809422

  • SHA256

    31257a30a3b1bf25d63c86e604e16cae16b725d8460782091c10ecf630059b4a

  • SHA512

    8a4ac6fb9f802645c9c3ef2ac000f06f8268f36f5ad62f60b6815f1d491e05d98a8a87774402148fb0117fc7d1d0926ac6e5f6bf7342e03c32da1c1dbe0850cc

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://coin-file-file-19.com/tratata.php

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • Arkei Stealer Payload ⋅ 2 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL ⋅ 3 IoCs
  • 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.

  • Delays execution with timeout.exe ⋅ 1 IoCs
  • Suspicious use of WriteProcessMemory ⋅ 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\31257a30a3b1bf25d63c86e604e16cae16b725d8460782091c10ecf630059b4a.exe
    "C:\Users\Admin\AppData\Local\Temp\31257a30a3b1bf25d63c86e604e16cae16b725d8460782091c10ecf630059b4a.exe"
    Loads dropped DLL
    Checks processor information in registry
    Suspicious use of WriteProcessMemory
    PID:3772
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\31257a30a3b1bf25d63c86e604e16cae16b725d8460782091c10ecf630059b4a.exe" & exit
      Suspicious use of WriteProcessMemory
      PID:3336
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        Delays execution with timeout.exe
        PID:3260

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\nss3.dll
                      MD5

                      bfac4e3c5908856ba17d41edcd455a51

                      SHA1

                      8eec7e888767aa9e4cca8ff246eb2aacb9170428

                      SHA256

                      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

                      SHA512

                      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

                    • \ProgramData\sqlite3.dll
                      MD5

                      e477a96c8f2b18d6b5c27bde49c990bf

                      SHA1

                      e980c9bf41330d1e5bd04556db4646a0210f7409

                      SHA256

                      16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

                      SHA512

                      335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

                    • memory/3772-118-0x0000000000790000-0x00000000007A1000-memory.dmp
                    • memory/3772-119-0x00000000007B0000-0x00000000007CC000-memory.dmp
                    • memory/3772-120-0x0000000000400000-0x000000000045E000-memory.dmp