Analysis

  • max time kernel
    151s
  • max time network
    162s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-05-2022 22:46

General

  • Target

    masarati.exe

  • Size

    28KB

  • MD5

    e7e752581b91e5bf2eccb44298128ec5

  • SHA1

    e321813c52ec62ebadce88cf8afaea4415186129

  • SHA256

    4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a

  • SHA512

    2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

Score
10/10

Malware Config

Extracted

Family

limerat

Wallets

12abaLRKG8Mg2F6V5jU3ek8FgMopZd9KEg

Attributes
  • aes_key

    4

  • antivm

    true

  • c2_url

    https://pastebin.com/raw/uSLpq9XN

  • delay

    5

  • download_payload

    false

  • install

    true

  • install_name

    officework.exe

  • main_folder

    Temp

  • pin_spread

    true

  • sub_folder

    \

  • usb_spread

    false

Signatures

  • LimeRAT

    Simple yet powerful RAT for Windows machines written in .NET.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Maps connected drives based on registry 3 TTPs 4 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\masarati.exe
    "C:\Users\Admin\AppData\Local\Temp\masarati.exe"
    1⤵
    • Loads dropped DLL
    • Maps connected drives based on registry
    • Suspicious use of WriteProcessMemory
    PID:336
    • C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Local\Temp\officework.exe'"
      2⤵
      • Creates scheduled task(s)
      PID:2004
    • C:\Users\Admin\AppData\Local\Temp\officework.exe
      "C:\Users\Admin\AppData\Local\Temp\officework.exe"
      2⤵
      • Executes dropped EXE
      • Maps connected drives based on registry
      • Modifies system certificate store
      • Suspicious use of AdjustPrivilegeToken
      PID:844

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\officework.exe

    Filesize

    28KB

    MD5

    e7e752581b91e5bf2eccb44298128ec5

    SHA1

    e321813c52ec62ebadce88cf8afaea4415186129

    SHA256

    4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a

    SHA512

    2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

  • C:\Users\Admin\AppData\Local\Temp\officework.exe

    Filesize

    28KB

    MD5

    e7e752581b91e5bf2eccb44298128ec5

    SHA1

    e321813c52ec62ebadce88cf8afaea4415186129

    SHA256

    4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a

    SHA512

    2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

  • \Users\Admin\AppData\Local\Temp\officework.exe

    Filesize

    28KB

    MD5

    e7e752581b91e5bf2eccb44298128ec5

    SHA1

    e321813c52ec62ebadce88cf8afaea4415186129

    SHA256

    4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a

    SHA512

    2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

  • \Users\Admin\AppData\Local\Temp\officework.exe

    Filesize

    28KB

    MD5

    e7e752581b91e5bf2eccb44298128ec5

    SHA1

    e321813c52ec62ebadce88cf8afaea4415186129

    SHA256

    4adcc73ce3501f990fc95bfb0ebca1a4ca61054b137a34c7bc9435cfdd2b7f6a

    SHA512

    2681a39b47f8620cef044b4a8336fb3e9f1261ab595b540746aabc5eba26b238c5c11383d2d3b829d56d5279e78587e68e7875a585e702fba57b35719e6c4e82

  • memory/336-54-0x00000000011C0000-0x00000000011CC000-memory.dmp

    Filesize

    48KB

  • memory/336-56-0x00000000752A1000-0x00000000752A3000-memory.dmp

    Filesize

    8KB

  • memory/844-59-0x0000000000000000-mapping.dmp

  • memory/844-62-0x0000000000E20000-0x0000000000E2C000-memory.dmp

    Filesize

    48KB

  • memory/2004-55-0x0000000000000000-mapping.dmp