Analysis

  • max time kernel
    145s
  • max time network
    164s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 03:28

General

  • Target

    RK__PO_2.exe

  • Size

    982KB

  • MD5

    a5796bf649f72fdcae32b0a0241de4fb

  • SHA1

    f302b9c34ed15e69f1fbe938fc7b0c817a2c963f

  • SHA256

    5e2a294936d4b10a484ef84819a6279566e1f3028fd684b653998054f7f42181

  • SHA512

    96f30fc24421f53160080936ef73741df0b5b604d1a158e3bcbb2bb747b1bb827a46fa6b71276b1645c2b9b6bcc28f9e0f250d4d698a04321c70257f9b9ac92b

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\AEF946DCB4\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.6.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.50 Location: United States Windows OS: Microsoft Windows 7 Ultimate 64bit Windows Serial Key: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 7:10:09 AM MassLogger Started: 5/21/2022 7:09:56 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RK__PO_2.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Signatures

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger Main Payload 33 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • ReZer0 packer 1 IoCs

    Detects ReZer0, a packer with multiple versions used in various campaigns.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook profiles 1 TTPs 15 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • 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 behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RK__PO_2.exe
    "C:\Users\Admin\AppData\Local\Temp\RK__PO_2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2040
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\zZyngPFdO" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8518.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1784
    • C:\Users\Admin\AppData\Local\Temp\RK__PO_2.exe
      "{path}"
      2⤵
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1120

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp8518.tmp

    Filesize

    1KB

    MD5

    632983e1c563da4f8529159afcf45fd0

    SHA1

    cf4d787bfe93edf2f1f0f770104e7f3e2721c110

    SHA256

    bd6b913378dd8232e8f8c3c5a3b949bf63410993039f5c0e51e80331b4a427cd

    SHA512

    80c0bf2593e4a3acff9715d117bd8e050e8a9bc6dfcaaa0f07b7a79c6d960a593babd99197d260cf37687ac546d37538944dfad2ec66c72f661f00f6bf2768e3

  • memory/1120-90-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-108-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-590-0x00000000021D0000-0x00000000021E4000-memory.dmp

    Filesize

    80KB

  • memory/1120-86-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-587-0x00000000007D0000-0x0000000000814000-memory.dmp

    Filesize

    272KB

  • memory/1120-60-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-61-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-63-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-64-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-66-0x00000000004ACD7E-mapping.dmp

  • memory/1120-65-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-68-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-70-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-72-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-74-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-88-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-78-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-80-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-82-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-84-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-589-0x0000000005005000-0x0000000005016000-memory.dmp

    Filesize

    68KB

  • memory/1120-124-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-76-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-92-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-94-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-96-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-98-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-100-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-102-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-104-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-110-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-122-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-112-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-106-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-114-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-116-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-118-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1120-120-0x0000000000400000-0x00000000004B2000-memory.dmp

    Filesize

    712KB

  • memory/1784-58-0x0000000000000000-mapping.dmp

  • memory/2040-56-0x0000000000640000-0x0000000000654000-memory.dmp

    Filesize

    80KB

  • memory/2040-55-0x0000000005C50000-0x0000000005D2C000-memory.dmp

    Filesize

    880KB

  • memory/2040-54-0x0000000000980000-0x0000000000A80000-memory.dmp

    Filesize

    1024KB

  • memory/2040-57-0x0000000005F10000-0x0000000005FC8000-memory.dmp

    Filesize

    736KB