Analysis

  • max time kernel
    130s
  • max time network
    183s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 03:22

General

  • Target

    DHL_AWB #1008936572891_pdf.exe

  • Size

    2.1MB

  • MD5

    3e910208a9f1bf03108895af8671078c

  • SHA1

    6b59a64f11e6559c1354c8097856593469ecd8bc

  • SHA256

    885179565290381c8e8e883f1e4c776507c1ddd3bfa8902f432ea31fbf01c683

  • SHA512

    525ee64a0e0915fa5f35534187c230d3526395ebb42d7c0c68123b9804158d66d0078821c0e7f7a1bf7554322fa28a47d73a6422a7e451fd7dac3062b43dffeb

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\3B8E3C2477\Log.txt

Family

masslogger

Ransom Note
<|| v2.4.0.0 ||> 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 7:02:41 AM MassLogger Started: 5/21/2022 7:02:26 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MassLoggerBinUPDATEProizvodnja.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Downloader ||> Disabled <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> NA

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • MassLogger

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

  • MassLogger Main Payload 5 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • AgentTesla Payload 7 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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 41 IoCs
  • Adds Run key to start application 2 TTPs 1 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.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DHL_AWB #1008936572891_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\DHL_AWB #1008936572891_pdf.exe"
    1⤵
    • Drops startup file
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1648
    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MassLoggerBinUPDATEProizvodnja.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MassLoggerBinUPDATEProizvodnja.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:968
    • C:\Users\Admin\AppData\Local\Temp\DHL_AWB #1008936572891_pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\DHL_AWB #1008936572891_pdf.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1044

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MassLoggerBinUPDATEProizvodnja.exe
    Filesize

    711KB

    MD5

    8bc40219a7641c3bcf72228173552977

    SHA1

    ccd09865e9c7adc458a85b7638b7cd3e6a843d83

    SHA256

    9e4cce1b23e7fdec9ab35c03326a7d3990aef52b7a5bce0d47d28bf8e56cfd6e

    SHA512

    d6273cd78443faac11ddfe3dbfe3731d0243cd2454227153c71593ad826df4c62d3488da29dc7a527ec5977c54e02d091eec43803f20832de518b9f3069c396e

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MassLoggerBinUPDATEProizvodnja.exe
    Filesize

    711KB

    MD5

    8bc40219a7641c3bcf72228173552977

    SHA1

    ccd09865e9c7adc458a85b7638b7cd3e6a843d83

    SHA256

    9e4cce1b23e7fdec9ab35c03326a7d3990aef52b7a5bce0d47d28bf8e56cfd6e

    SHA512

    d6273cd78443faac11ddfe3dbfe3731d0243cd2454227153c71593ad826df4c62d3488da29dc7a527ec5977c54e02d091eec43803f20832de518b9f3069c396e

  • \Users\Admin\AppData\Local\Temp\305ca9ce-05a7-4081-bcf5-b3110c43e68e\l.dll
    Filesize

    94KB

    MD5

    14ff402962ad21b78ae0b4c43cd1f194

    SHA1

    f8a510eb26666e875a5bdd1cadad40602763ad72

    SHA256

    fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

    SHA512

    daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

  • \Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MassLoggerBinUPDATEProizvodnja.exe
    Filesize

    711KB

    MD5

    8bc40219a7641c3bcf72228173552977

    SHA1

    ccd09865e9c7adc458a85b7638b7cd3e6a843d83

    SHA256

    9e4cce1b23e7fdec9ab35c03326a7d3990aef52b7a5bce0d47d28bf8e56cfd6e

    SHA512

    d6273cd78443faac11ddfe3dbfe3731d0243cd2454227153c71593ad826df4c62d3488da29dc7a527ec5977c54e02d091eec43803f20832de518b9f3069c396e

  • memory/968-63-0x0000000001390000-0x0000000001448000-memory.dmp
    Filesize

    736KB

  • memory/968-79-0x0000000004CD5000-0x0000000004CE6000-memory.dmp
    Filesize

    68KB

  • memory/968-64-0x0000000000C50000-0x0000000000CC8000-memory.dmp
    Filesize

    480KB

  • memory/968-60-0x0000000000000000-mapping.dmp
  • memory/1044-72-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/1044-67-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/1044-68-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/1044-70-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/1044-71-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/1044-73-0x000000000045445E-mapping.dmp
  • memory/1044-77-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/1044-75-0x0000000000400000-0x000000000045A000-memory.dmp
    Filesize

    360KB

  • memory/1648-56-0x0000000000320000-0x0000000000342000-memory.dmp
    Filesize

    136KB

  • memory/1648-66-0x0000000000D20000-0x0000000000D2A000-memory.dmp
    Filesize

    40KB

  • memory/1648-54-0x0000000001190000-0x00000000013A4000-memory.dmp
    Filesize

    2.1MB

  • memory/1648-55-0x0000000075F61000-0x0000000075F63000-memory.dmp
    Filesize

    8KB