masslogger | 8eb48dc7cab80734e38199367de43421aebe7c92e036e056c9f7ce69378eef43

General

Target

ttttttt.exe
Size

1.3MB
MD5

5871c56853982658b13619b6beae47da
SHA1

f2dbb57a824853f48a6b16797e9682b328078b93
SHA256

296b2d6c24dd68f7a59ea4388d979bba6572c288ab891cd35ec81e56c602318d
SHA512

5cc16a8c7a76320927f3818845929fe42583a0f6151144e81d2a6afb0d86a6ea3c65efaa6efd54f6b5f40dd5f1d33bf0638089516d75c2819cb8ae4c7606edd1

Score

10^/10

masslogger collection ransomware spyware stealer

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 1:59:29 PM MassLogger Started: 5/21/2022 1:59:22 PM Interval: 1 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\ttttttt.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.
stealer spyware masslogger

MassLogger Main Payload 2 IoCs

resource	yara_rule
behavioral1/memory/1632-59-0x0000000001FC0000-0x0000000002068000-memory.dmp	family_masslogger
behavioral1/memory/1632-60-0x0000000001FC0000-0x0000000002068000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation	ttttttt.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\tttttttttt.vbs	notepad.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 15 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	ttttttt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	ttttttt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	ttttttt.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	ttttttt.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	ttttttt.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	ttttttt.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
3	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1652 set thread context of 1632	1652	ttttttt.exe	29

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1632	ttttttt.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1652	ttttttt.exe
1632	ttttttt.exe
1632	ttttttt.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1652	ttttttt.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1632	ttttttt.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1632	ttttttt.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 1976	1652	ttttttt.exe	28
PID 1652 wrote to memory of 1976	1652	ttttttt.exe	28
PID 1652 wrote to memory of 1976	1652	ttttttt.exe	28
PID 1652 wrote to memory of 1976	1652	ttttttt.exe	28
PID 1652 wrote to memory of 1976	1652	ttttttt.exe	28
PID 1652 wrote to memory of 1976	1652	ttttttt.exe	28
PID 1652 wrote to memory of 1632	1652	ttttttt.exe	29
PID 1652 wrote to memory of 1632	1652	ttttttt.exe	29
PID 1652 wrote to memory of 1632	1652	ttttttt.exe	29
PID 1652 wrote to memory of 1632	1652	ttttttt.exe	29

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ttttttt.exe

C:\Users\Admin\AppData\Local\Temp\ttttttt.exe
"C:\Users\Admin\AppData\Local\Temp\ttttttt.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1652
- C:\Windows\SysWOW64\notepad.exe
  "C:\Windows\system32\notepad.exe"
  2⤵
  - Drops startup file
  PID:1976
- C:\Users\Admin\AppData\Local\Temp\ttttttt.exe
  "C:\Users\Admin\AppData\Local\Temp\ttttttt.exe"
  2⤵
  - Checks computer location settings
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:1632

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1632-59-0x0000000001FC0000-0x0000000002068000-memory.dmp

Filesize
672KB

Download
memory/1632-60-0x0000000001FC0000-0x0000000002068000-memory.dmp

Filesize
672KB

Download
memory/1632-62-0x0000000002560000-0x00000000025A4000-memory.dmp

Filesize
272KB

Download
memory/1632-63-0x0000000004D95000-0x0000000004DA6000-memory.dmp

Filesize
68KB

Download
memory/1652-54-0x0000000076851000-0x0000000076853000-memory.dmp

Filesize
8KB

Download
memory/1652-55-0x0000000000330000-0x000000000033A000-memory.dmp

Filesize
40KB

Download

Analysis

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