Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 00:11

General

  • Target

    91963dd82de52d5f3026d723eb654ad9ecfc49622f2c97602fcd5cf05dc79ff5.exe

  • Size

    28KB

  • MD5

    f73d2a6cc30b843a528073f9e89a9474

  • SHA1

    138d45ae3a1a04ca532384966495605bc46a1c84

  • SHA256

    91963dd82de52d5f3026d723eb654ad9ecfc49622f2c97602fcd5cf05dc79ff5

  • SHA512

    c7b7c1313c6a2aaea87469eb3bb6cdd64808cf5fc3c01ea8b6f30f01d38f16dbbd0c2663f3a7e17b27e1b4bc418564f80ed66cc7b424bbda684e6af31ee7ba17

Score
10/10

Malware Config

Extracted

Family

limerat

Attributes
  • aes_key

    XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

  • antivm

    true

  • c2_url

    https://pastebin.com/raw/bf4enpi6

  • delay

    3

  • download_payload

    false

  • install

    true

  • install_name

    lr.tmp.exe

  • main_folder

    Temp

  • pin_spread

    false

  • sub_folder

    \

  • usb_spread

    true

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.

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\91963dd82de52d5f3026d723eb654ad9ecfc49622f2c97602fcd5cf05dc79ff5.exe
    "C:\Users\Admin\AppData\Local\Temp\91963dd82de52d5f3026d723eb654ad9ecfc49622f2c97602fcd5cf05dc79ff5.exe"
    1⤵
    • Loads dropped DLL
    • Maps connected drives based on registry
    • Suspicious use of WriteProcessMemory
    PID:1624
    • C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Local\Temp\lr.tmp.exe'"
      2⤵
      • Creates scheduled task(s)
      PID:1604
    • C:\Users\Admin\AppData\Local\Temp\lr.tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\lr.tmp.exe"
      2⤵
      • Executes dropped EXE
      • Maps connected drives based on registry
      • Suspicious use of AdjustPrivilegeToken
      PID:268

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\lr.tmp.exe

    Filesize

    28KB

    MD5

    f73d2a6cc30b843a528073f9e89a9474

    SHA1

    138d45ae3a1a04ca532384966495605bc46a1c84

    SHA256

    91963dd82de52d5f3026d723eb654ad9ecfc49622f2c97602fcd5cf05dc79ff5

    SHA512

    c7b7c1313c6a2aaea87469eb3bb6cdd64808cf5fc3c01ea8b6f30f01d38f16dbbd0c2663f3a7e17b27e1b4bc418564f80ed66cc7b424bbda684e6af31ee7ba17

  • C:\Users\Admin\AppData\Local\Temp\lr.tmp.exe

    Filesize

    28KB

    MD5

    f73d2a6cc30b843a528073f9e89a9474

    SHA1

    138d45ae3a1a04ca532384966495605bc46a1c84

    SHA256

    91963dd82de52d5f3026d723eb654ad9ecfc49622f2c97602fcd5cf05dc79ff5

    SHA512

    c7b7c1313c6a2aaea87469eb3bb6cdd64808cf5fc3c01ea8b6f30f01d38f16dbbd0c2663f3a7e17b27e1b4bc418564f80ed66cc7b424bbda684e6af31ee7ba17

  • \Users\Admin\AppData\Local\Temp\lr.tmp.exe

    Filesize

    28KB

    MD5

    f73d2a6cc30b843a528073f9e89a9474

    SHA1

    138d45ae3a1a04ca532384966495605bc46a1c84

    SHA256

    91963dd82de52d5f3026d723eb654ad9ecfc49622f2c97602fcd5cf05dc79ff5

    SHA512

    c7b7c1313c6a2aaea87469eb3bb6cdd64808cf5fc3c01ea8b6f30f01d38f16dbbd0c2663f3a7e17b27e1b4bc418564f80ed66cc7b424bbda684e6af31ee7ba17

  • \Users\Admin\AppData\Local\Temp\lr.tmp.exe

    Filesize

    28KB

    MD5

    f73d2a6cc30b843a528073f9e89a9474

    SHA1

    138d45ae3a1a04ca532384966495605bc46a1c84

    SHA256

    91963dd82de52d5f3026d723eb654ad9ecfc49622f2c97602fcd5cf05dc79ff5

    SHA512

    c7b7c1313c6a2aaea87469eb3bb6cdd64808cf5fc3c01ea8b6f30f01d38f16dbbd0c2663f3a7e17b27e1b4bc418564f80ed66cc7b424bbda684e6af31ee7ba17

  • memory/268-59-0x0000000000000000-mapping.dmp

  • memory/268-62-0x0000000000D00000-0x0000000000D0C000-memory.dmp

    Filesize

    48KB

  • memory/1604-55-0x0000000000000000-mapping.dmp

  • memory/1624-54-0x0000000000230000-0x000000000023C000-memory.dmp

    Filesize

    48KB

  • memory/1624-56-0x0000000075C71000-0x0000000075C73000-memory.dmp

    Filesize

    8KB