Analysis

  • max time kernel
    117s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    23-01-2022 23:05

General

  • Target

    b7f81c3639833e73edc017da64e789a24a2c1974a7a18e68f868bdd4a35865c4.exe

  • Size

    284KB

  • MD5

    82cd807305553d350a17753d6201d3ce

  • SHA1

    1eaaee1ca9eba9c56b4d8cdc796e96d4f7aa624c

  • SHA256

    b7f81c3639833e73edc017da64e789a24a2c1974a7a18e68f868bdd4a35865c4

  • SHA512

    eba0695016c42ffb99636d6bdc19bac97cadad8fa11dee8b3a2b947b64494e719f9a6852694b816db3813ac79fd3caf1b5e976b7a2a3f9adc1726260fbc9b36f

Malware Config

Extracted

Family

arkei

Botnet

Default

C2

http://homesteadr.link/ggate.php

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs
  • Arkei Stealer Payload 2 IoCs
  • Downloads MZ/PE file
  • Sets service image path in registry 2 TTPs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 5 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies data under HKEY_USERS 41 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b7f81c3639833e73edc017da64e789a24a2c1974a7a18e68f868bdd4a35865c4.exe
    "C:\Users\Admin\AppData\Local\Temp\b7f81c3639833e73edc017da64e789a24a2c1974a7a18e68f868bdd4a35865c4.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:816
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b7f81c3639833e73edc017da64e789a24a2c1974a7a18e68f868bdd4a35865c4.exe" & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1508
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 5
        3⤵
        • Delays execution with timeout.exe
        PID:3368
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 816 -s 1496
      2⤵
      • Drops file in Windows directory
      • Program crash
      • Checks processor information in registry
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3624
  • C:\Windows\System32\WaaSMedicAgent.exe
    C:\Windows\System32\WaaSMedicAgent.exe 9a3a41babf0c54e0e777606d9ff737cd VsQyJh57YUu1dc/cdndsNA.0.1.0.0.0
    1⤵
    • Modifies data under HKEY_USERS
    PID:444
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 816 -ip 816
    1⤵
    • Suspicious use of NtCreateProcessExOtherParentProcess
    • Suspicious use of WriteProcessMemory
    PID:1964
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k wusvcs -p
    1⤵
      PID:3348

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    2
    T1081

    Discovery

    Query Registry

    4
    T1012

    System Information Discovery

    4
    T1082

    Collection

    Data from Local System

    2
    T1005

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\mozglue.dll
      MD5

      8f73c08a9660691143661bf7332c3c27

      SHA1

      37fa65dd737c50fda710fdbde89e51374d0c204a

      SHA256

      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

      SHA512

      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

    • C:\ProgramData\nss3.dll
      MD5

      bfac4e3c5908856ba17d41edcd455a51

      SHA1

      8eec7e888767aa9e4cca8ff246eb2aacb9170428

      SHA256

      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

      SHA512

      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

    • C:\ProgramData\sqlite3.dll
      MD5

      e477a96c8f2b18d6b5c27bde49c990bf

      SHA1

      e980c9bf41330d1e5bd04556db4646a0210f7409

      SHA256

      16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660

      SHA512

      335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c

    • memory/816-130-0x0000000000580000-0x0000000000591000-memory.dmp
      Filesize

      68KB

    • memory/816-131-0x00000000005B0000-0x00000000005CC000-memory.dmp
      Filesize

      112KB

    • memory/816-132-0x0000000000400000-0x000000000044F000-memory.dmp
      Filesize

      316KB