Analysis

  • max time kernel
    147s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    14-12-2023 08:15

General

  • Target

    f0207a4a17b47cba7d87142363b12477.exe

  • Size

    3.1MB

  • MD5

    f0207a4a17b47cba7d87142363b12477

  • SHA1

    c2203e69e92e6ba6394e6f711429fadf8b65845e

  • SHA256

    d2835aa9243d529d8d44846d383f97f1bb7b976bc4c378d29d2387d1ba6c1d09

  • SHA512

    35f37bb38a070220dbe9f6511ab5bf8bca07fae46b5edefa5356a9294fc98b97735719410887b40776a7232711620f5c92f6bb45a7a54d597faef675196da810

  • SSDEEP

    49152:Kvpt62XlaSFNWPjljiFa2RoUYIAunRJ65bR3LoGdcTHHB72eh2NT:Kvj62XlaSFNWPjljiFXRoUYIAunRJ67

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

127.0.0.1:4782

Mutex

4b2195e4-fb92-4868-914b-7332837f4388

Attributes
  • encryption_key

    26FFD71DADD23C1D90404D858942E1C47093C7CF

  • install_name

    Synecs.exe

  • log_directory

    pergs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f0207a4a17b47cba7d87142363b12477.exe
    "C:\Users\Admin\AppData\Local\Temp\f0207a4a17b47cba7d87142363b12477.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2852
    • C:\Users\Admin\AppData\Roaming\SubDir\Synecs.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Synecs.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2904

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\SubDir\Synecs.exe

    Filesize

    2.8MB

    MD5

    429de06914d1e1a5cf09dd755484477b

    SHA1

    145a12277186734a6ef5c797be7b8c8a88e39741

    SHA256

    38a5b3dd3704940537ab05d6e620a4b3c043552810cfc396b918da9915b77152

    SHA512

    8ef1808c5aa2846ca9b98ec8876d23d8000b578e57a9e5b2a6e1364a5636d18ee1968a0a2f672b69ff7c8a8704498dbc9db7c3d1c575594cddafe48b9f8aed6a

  • C:\Users\Admin\AppData\Roaming\SubDir\Synecs.exe

    Filesize

    1.9MB

    MD5

    df53c8bb353c99a68b7a08e825eb9f69

    SHA1

    ca55da52c540241dfa36a8a916323374f3c4a0ce

    SHA256

    c6fa1f2359fe0441ca266220d4e0696e0e713c5bde4dc40e3e5ab7c4bca16515

    SHA512

    fd80f62c5b309252f6678c003dbb38943baed7efaf2da7a36e081c13023eb3785daa6a89941bd4021937126390a715a5be705ad47513d3a8b87f203d97b97ed0

  • memory/2852-0-0x00000000011B0000-0x00000000014D6000-memory.dmp

    Filesize

    3.1MB

  • memory/2852-1-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

    Filesize

    9.9MB

  • memory/2852-2-0x000000001B550000-0x000000001B5D0000-memory.dmp

    Filesize

    512KB

  • memory/2852-9-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

    Filesize

    9.9MB

  • memory/2904-7-0x0000000000DA0000-0x00000000010C6000-memory.dmp

    Filesize

    3.1MB

  • memory/2904-8-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

    Filesize

    9.9MB

  • memory/2904-10-0x000007FEF5E90000-0x000007FEF687C000-memory.dmp

    Filesize

    9.9MB

  • memory/2904-11-0x000000001B150000-0x000000001B1D0000-memory.dmp

    Filesize

    512KB