Overview

overview

10

Static

static

Contract R...er.exe

windows7_x64

10

Contract R...er.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    96s
  • max time network
    100s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 11:23

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General

  • Target

    Contract RequestPurchase Order.exe

  • Size

    862KB

  • MD5

    983c9501317f9b4091073e067900afb3

  • SHA1

    62f508b5fb7e80f5b755e5c6b351d244ddfce74f

  • SHA256

    7bb0368333b8dc8c6b4c422f11c02ec43d385547b460c2f1f8cf78013521a2f5

  • SHA512

    b587eb07df4d9388f28764340419e7981e6b47c76e58fb26305b1c952623d05c42c4a7886ccc6c50ea57148a561f5909bf8282afb1883f253cb6eb94e179a7d0

Score
10/10
massloggercollectionevasionransomwarerezer0spywarestealer

Malware Config

Extracted

Path

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

Family

masslogger

Ransom Note
################################################################# MassLogger v1.3.7.1 ################################################################# ### 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 2:10:17 PM MassLogger Started: 5/21/2022 2:10:10 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Contract RequestPurchase Order.exe MassLogger Melt: false MassLogger Exit after delivery: true As Administrator: True Processes:

Signatures

  • MassLogger

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

    stealerspywaremasslogger
  • MassLogger Main Payload 6 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs
    evasion
  • ReZer0 packer 1 IoCs

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

    rezer0
  • Looks for VMWare Tools registry key 2 TTPs
    evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • 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.

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

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

  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Contract RequestPurchase Order.exe
    "C:\Users\Admin\AppData\Local\Temp\Contract RequestPurchase Order.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1852
    • C:\Users\Admin\AppData\Local\Temp\Contract RequestPurchase Order.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:2032

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • memory/1852-54-0x00000000011C0000-0x000000000129E000-memory.dmp
    Filesize

    888KB

    Download
  • memory/1852-55-0x00000000005A0000-0x00000000005B6000-memory.dmp
    Filesize

    88KB

    Download
  • memory/1852-56-0x0000000004A20000-0x0000000004ACE000-memory.dmp
    Filesize

    696KB

    Download
  • memory/2032-57-0x0000000000400000-0x00000000004A8000-memory.dmp
    Filesize

    672KB

    Download
  • memory/2032-58-0x0000000000400000-0x00000000004A8000-memory.dmp
    Filesize

    672KB

    Download
  • memory/2032-61-0x0000000000400000-0x00000000004A8000-memory.dmp
    Filesize

    672KB

    Download
  • memory/2032-60-0x0000000000400000-0x00000000004A8000-memory.dmp
    Filesize

    672KB

    Download
  • memory/2032-62-0x0000000000400000-0x00000000004A8000-memory.dmp
    Filesize

    672KB

    Download
  • memory/2032-63-0x00000000004A2B8E-mapping.dmp
    Download
  • memory/2032-65-0x0000000000400000-0x00000000004A8000-memory.dmp
    Filesize

    672KB

    Download
  • memory/2032-67-0x0000000000400000-0x00000000004A8000-memory.dmp
    Filesize

    672KB

    Download
  • memory/2032-68-0x00000000005D0000-0x0000000000614000-memory.dmp
    Filesize

    272KB

    Download
  • memory/2032-69-0x0000000075AE1000-0x0000000075AE3000-memory.dmp
    Filesize

    8KB

    Download
  • memory/2032-70-0x0000000004DF5000-0x0000000004E06000-memory.dmp
    Filesize

    68KB

    Download