Analysis

  • max time kernel
    101s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 02:08

General

  • Target

    f66ba3c720e0df70977904953fb0f359eddcc621703aec51d1d3f16e099a2816.exe

  • Size

    1.3MB

  • MD5

    4dd93076bfc75f76a248882ac422a31a

  • SHA1

    53d904be35b2e8c7de03c20f6e54067046b2ce57

  • SHA256

    f66ba3c720e0df70977904953fb0f359eddcc621703aec51d1d3f16e099a2816

  • SHA512

    11e9f6b84cfd5403424c7da60011581fc591dbbf8d5f8ad02f0d1b920edfc3ed06dec27ba254a57bab3b036e65ab9af5713b3764447ce89cdaca328bfc9024b3

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\79FE0CC911\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.6.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 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 3:17:14 AM MassLogger Started: 5/21/2022 3:17:03 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\f66ba3c720e0df70977904953fb0f359eddcc621703aec51d1d3f16e099a2816.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.ru
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    cruizjamesvhjkl@

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.

  • 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f66ba3c720e0df70977904953fb0f359eddcc621703aec51d1d3f16e099a2816.exe
    "C:\Users\Admin\AppData\Local\Temp\f66ba3c720e0df70977904953fb0f359eddcc621703aec51d1d3f16e099a2816.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:908
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\hUwUwo" /XML "C:\Users\Admin\AppData\Local\Temp\tmpADA.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1156
    • C:\Users\Admin\AppData\Local\Temp\f66ba3c720e0df70977904953fb0f359eddcc621703aec51d1d3f16e099a2816.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:1836

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpADA.tmp
    Filesize

    1KB

    MD5

    fcf441b967ceb41a8ae5c967c0a33e26

    SHA1

    f62f4b8f35f0c184b68cf235a71e85b110cff380

    SHA256

    bf1fbe607b513a63eeb18990f828411f555594b5b88480320419acd9aa0779bb

    SHA512

    e1dbd992d59c9272f62c02500de6b8824e2dc968f5aca65260bf7effc0e8364e8b45605c0a29c52ad37a674523a924dc21a3bd19016eb3a6b6c6139a0901919e

  • memory/908-54-0x0000000000BA0000-0x0000000000CEE000-memory.dmp
    Filesize

    1.3MB

  • memory/908-55-0x00000000001F0000-0x00000000001FA000-memory.dmp
    Filesize

    40KB

  • memory/908-56-0x0000000007950000-0x0000000007A0A000-memory.dmp
    Filesize

    744KB

  • memory/1156-57-0x0000000000000000-mapping.dmp
  • memory/1836-85-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-93-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-62-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-63-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-64-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-65-0x00000000004ACD7E-mapping.dmp
  • memory/1836-67-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-69-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-71-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-73-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-75-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-77-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-79-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-81-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-83-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-59-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-87-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-89-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-91-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-60-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-95-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-97-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-99-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-101-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-103-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-105-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-107-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-109-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-111-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-113-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-115-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-117-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-121-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-119-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-123-0x0000000000400000-0x00000000004B2000-memory.dmp
    Filesize

    712KB

  • memory/1836-586-0x0000000000510000-0x0000000000554000-memory.dmp
    Filesize

    272KB

  • memory/1836-588-0x0000000004F85000-0x0000000004F96000-memory.dmp
    Filesize

    68KB

  • memory/1836-589-0x0000000002260000-0x0000000002274000-memory.dmp
    Filesize

    80KB