Analysis

  • max time kernel
    98s
  • max time network
    140s
  • platform
    windows7_x64
  • resource
    win7-20220715-en
  • resource tags

    arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
  • submitted
    31/07/2022, 13:46

General

  • Target

    4a9f6c4b7a5c0716912b22366f2b84ae.exe

  • Size

    317KB

  • MD5

    4a9f6c4b7a5c0716912b22366f2b84ae

  • SHA1

    c89d3f01152d9c593583545403492d958210831e

  • SHA256

    4b8067eeb1ff123514e59e09404686f72e9587b723814dd19efdecef767e848a

  • SHA512

    3d318bec41b833930577857e3d7ae3725c3560f4bb9692bb8a448ab1324f7f0ccc28d1ccbe7b9af7149caffc14efcac63d3a43893b6210e8f878e903a16d6085

Malware Config

Extracted

Family

arkei

Botnet

Default

Signatures

  • Arkei

    Arkei is an infostealer written in C++.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 7 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • 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
  • Modifies Internet Explorer settings 1 TTPs 34 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4a9f6c4b7a5c0716912b22366f2b84ae.exe
    "C:\Users\Admin\AppData\Local\Temp\4a9f6c4b7a5c0716912b22366f2b84ae.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:912
    • C:\Users\Admin\AppData\Local\Temp\upc.0.exe
      "C:\Users\Admin\AppData\Local\Temp\upc.0.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:2036
      • C:\Users\Admin\AppData\Local\Temp\upc.0.exe
        "C:\Users\Admin\AppData\Local\Temp\upc.0.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious use of WriteProcessMemory
        PID:1364
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\upc.0.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:980
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 5
            5⤵
            • Delays execution with timeout.exe
            PID:1420
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" https://yip.su/2N19t7
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1988
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1988 CREDAT:275457 /prefetch:2
        3⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:1776

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\upc.0.exe

    Filesize

    364KB

    MD5

    a5a77a06940cb5c8933934b8c9e4ac27

    SHA1

    a4d0bebefcbef7b718acd9f2e69a9b7767213a51

    SHA256

    7626e47624b6d66f33395c1c0febb9d8f2c8eb9197ad4eda6c61f86f8660b7b8

    SHA512

    dcaaabc990fd6f971810887a27cd7204bf5cc3cd16e7f4ac0712e41a277051980a079f4b9ea181d1d4509aa56b6b74d454ad2877b50e67029080adb79e7a5aad

  • C:\Users\Admin\AppData\Local\Temp\upc.0.exe

    Filesize

    364KB

    MD5

    a5a77a06940cb5c8933934b8c9e4ac27

    SHA1

    a4d0bebefcbef7b718acd9f2e69a9b7767213a51

    SHA256

    7626e47624b6d66f33395c1c0febb9d8f2c8eb9197ad4eda6c61f86f8660b7b8

    SHA512

    dcaaabc990fd6f971810887a27cd7204bf5cc3cd16e7f4ac0712e41a277051980a079f4b9ea181d1d4509aa56b6b74d454ad2877b50e67029080adb79e7a5aad

  • C:\Users\Admin\AppData\Local\Temp\upc.0.exe

    Filesize

    364KB

    MD5

    a5a77a06940cb5c8933934b8c9e4ac27

    SHA1

    a4d0bebefcbef7b718acd9f2e69a9b7767213a51

    SHA256

    7626e47624b6d66f33395c1c0febb9d8f2c8eb9197ad4eda6c61f86f8660b7b8

    SHA512

    dcaaabc990fd6f971810887a27cd7204bf5cc3cd16e7f4ac0712e41a277051980a079f4b9ea181d1d4509aa56b6b74d454ad2877b50e67029080adb79e7a5aad

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\KKP390VT.txt

    Filesize

    600B

    MD5

    83abe0ad619993fb13285b4c0a2f6674

    SHA1

    9c5e40b57d6dc45b3f538281b046c0bb5c906aca

    SHA256

    efa66241c435ba6fa8e19a555bbf127742733e0615bc22bb40886175f7509200

    SHA512

    4cb9fb3989bdad02a75ba4f1fc8035ab016b4e232cacf041252ea701549dd9522c9102b6b5241afc19bf5f58c1b25076dbf875d9a30fe66d7b8c48c984c43547

  • \ProgramData\mozglue.dll

    Filesize

    133KB

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll

    Filesize

    1.2MB

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • \Users\Admin\AppData\Local\Temp\upc.0.exe

    Filesize

    364KB

    MD5

    a5a77a06940cb5c8933934b8c9e4ac27

    SHA1

    a4d0bebefcbef7b718acd9f2e69a9b7767213a51

    SHA256

    7626e47624b6d66f33395c1c0febb9d8f2c8eb9197ad4eda6c61f86f8660b7b8

    SHA512

    dcaaabc990fd6f971810887a27cd7204bf5cc3cd16e7f4ac0712e41a277051980a079f4b9ea181d1d4509aa56b6b74d454ad2877b50e67029080adb79e7a5aad

  • \Users\Admin\AppData\Local\Temp\upc.0.exe

    Filesize

    364KB

    MD5

    a5a77a06940cb5c8933934b8c9e4ac27

    SHA1

    a4d0bebefcbef7b718acd9f2e69a9b7767213a51

    SHA256

    7626e47624b6d66f33395c1c0febb9d8f2c8eb9197ad4eda6c61f86f8660b7b8

    SHA512

    dcaaabc990fd6f971810887a27cd7204bf5cc3cd16e7f4ac0712e41a277051980a079f4b9ea181d1d4509aa56b6b74d454ad2877b50e67029080adb79e7a5aad

  • \Users\Admin\AppData\Local\Temp\upc.0.exe

    Filesize

    364KB

    MD5

    a5a77a06940cb5c8933934b8c9e4ac27

    SHA1

    a4d0bebefcbef7b718acd9f2e69a9b7767213a51

    SHA256

    7626e47624b6d66f33395c1c0febb9d8f2c8eb9197ad4eda6c61f86f8660b7b8

    SHA512

    dcaaabc990fd6f971810887a27cd7204bf5cc3cd16e7f4ac0712e41a277051980a079f4b9ea181d1d4509aa56b6b74d454ad2877b50e67029080adb79e7a5aad

  • \Users\Admin\AppData\Local\Temp\upc.0.exe

    Filesize

    364KB

    MD5

    a5a77a06940cb5c8933934b8c9e4ac27

    SHA1

    a4d0bebefcbef7b718acd9f2e69a9b7767213a51

    SHA256

    7626e47624b6d66f33395c1c0febb9d8f2c8eb9197ad4eda6c61f86f8660b7b8

    SHA512

    dcaaabc990fd6f971810887a27cd7204bf5cc3cd16e7f4ac0712e41a277051980a079f4b9ea181d1d4509aa56b6b74d454ad2877b50e67029080adb79e7a5aad

  • \Users\Admin\AppData\Local\Temp\upc.0.exe

    Filesize

    364KB

    MD5

    a5a77a06940cb5c8933934b8c9e4ac27

    SHA1

    a4d0bebefcbef7b718acd9f2e69a9b7767213a51

    SHA256

    7626e47624b6d66f33395c1c0febb9d8f2c8eb9197ad4eda6c61f86f8660b7b8

    SHA512

    dcaaabc990fd6f971810887a27cd7204bf5cc3cd16e7f4ac0712e41a277051980a079f4b9ea181d1d4509aa56b6b74d454ad2877b50e67029080adb79e7a5aad

  • memory/912-54-0x0000000074DB1000-0x0000000074DB3000-memory.dmp

    Filesize

    8KB

  • memory/1364-95-0x0000000000400000-0x000000000043D000-memory.dmp

    Filesize

    244KB

  • memory/1364-68-0x0000000000400000-0x000000000043D000-memory.dmp

    Filesize

    244KB

  • memory/1364-70-0x0000000000400000-0x000000000043D000-memory.dmp

    Filesize

    244KB

  • memory/1364-72-0x0000000060900000-0x0000000060992000-memory.dmp

    Filesize

    584KB

  • memory/1364-91-0x0000000000400000-0x000000000043D000-memory.dmp

    Filesize

    244KB

  • memory/1364-63-0x0000000000400000-0x000000000043D000-memory.dmp

    Filesize

    244KB

  • memory/2036-69-0x0000000000220000-0x000000000024A000-memory.dmp

    Filesize

    168KB

  • memory/2036-67-0x000000000052C000-0x000000000054D000-memory.dmp

    Filesize

    132KB