Analysis

  • max time kernel
    138s
  • max time network
    87s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    23-05-2022 18:22

General

  • Target

    01b5f44cdf8085044c0f6b42f7cc1159d813e599deb76ed6e02c78c1833b717a.exe

  • Size

    28KB

  • MD5

    5b70d0093091a03dec58ec96331a3e60

  • SHA1

    65e9bbb4651d0137d252977d12391d3a3a7d9edc

  • SHA256

    01b5f44cdf8085044c0f6b42f7cc1159d813e599deb76ed6e02c78c1833b717a

  • SHA512

    4d9a87b97e57621df3337b5d1b214e30f794545dcb47ff887b7fabf7186cf395ad64c3b061ce7e7ee0d399f3358b3cb172ca23f63f4c4c09b6ee52ed406e1e24

Score
10/10

Malware Config

Extracted

Family

limerat

Wallets

1NVdWmBPhq364foSwdwNskjpvkcCdEDymb

Attributes
  • aes_key

    88

  • antivm

    true

  • c2_url

    https://pastebin.com/raw/wCACXBsj

  • delay

    3

  • download_payload

    false

  • install

    true

  • install_name

    Wservices.exe

  • main_folder

    Temp

  • pin_spread

    true

  • sub_folder

    \

  • usb_spread

    true

Signatures

  • LimeRAT

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

  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\01b5f44cdf8085044c0f6b42f7cc1159d813e599deb76ed6e02c78c1833b717a.exe
    "C:\Users\Admin\AppData\Local\Temp\01b5f44cdf8085044c0f6b42f7cc1159d813e599deb76ed6e02c78c1833b717a.exe"
    1⤵
    • Checks computer location settings
    • Maps connected drives based on registry
    • Suspicious use of WriteProcessMemory
    PID:1868
    • C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Local\Temp\Wservices.exe'"
      2⤵
      • Creates scheduled task(s)
      PID:1936
    • C:\Users\Admin\AppData\Local\Temp\Wservices.exe
      "C:\Users\Admin\AppData\Local\Temp\Wservices.exe"
      2⤵
      • Executes dropped EXE
      • Maps connected drives based on registry
      • Suspicious use of AdjustPrivilegeToken
      PID:3472

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    28KB

    MD5

    5b70d0093091a03dec58ec96331a3e60

    SHA1

    65e9bbb4651d0137d252977d12391d3a3a7d9edc

    SHA256

    01b5f44cdf8085044c0f6b42f7cc1159d813e599deb76ed6e02c78c1833b717a

    SHA512

    4d9a87b97e57621df3337b5d1b214e30f794545dcb47ff887b7fabf7186cf395ad64c3b061ce7e7ee0d399f3358b3cb172ca23f63f4c4c09b6ee52ed406e1e24

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

    Filesize

    28KB

    MD5

    5b70d0093091a03dec58ec96331a3e60

    SHA1

    65e9bbb4651d0137d252977d12391d3a3a7d9edc

    SHA256

    01b5f44cdf8085044c0f6b42f7cc1159d813e599deb76ed6e02c78c1833b717a

    SHA512

    4d9a87b97e57621df3337b5d1b214e30f794545dcb47ff887b7fabf7186cf395ad64c3b061ce7e7ee0d399f3358b3cb172ca23f63f4c4c09b6ee52ed406e1e24

  • memory/1868-130-0x00000000002D0000-0x00000000002DC000-memory.dmp

    Filesize

    48KB

  • memory/1868-131-0x0000000004C20000-0x0000000004CBC000-memory.dmp

    Filesize

    624KB

  • memory/1868-132-0x0000000004CC0000-0x0000000004D26000-memory.dmp

    Filesize

    408KB

  • memory/1868-133-0x00000000058E0000-0x0000000005E84000-memory.dmp

    Filesize

    5.6MB

  • memory/1936-134-0x0000000000000000-mapping.dmp

  • memory/3472-135-0x0000000000000000-mapping.dmp

  • memory/3472-138-0x0000000006820000-0x00000000068B2000-memory.dmp

    Filesize

    584KB