masslogger | e7db55f40cecf0edd8be2fc73b1d56ba1f3cf0c0c5b0b27ed74a1acfb3574a86

General

Target

Purchae required and shipment details.exe
Size

640KB
MD5

6ef86a2fb28358e7aeb510c0aa82191b
SHA1

f81b6ea45f4c1abc82997f36b6ed57649063a701
SHA256

41df7c7f04b04ac0f2eb88f099c9df36f01e11eaff1c189573f49054758d653d
SHA512

2adb642a7ce5e3dc3411c4ed9d368b7e3331ef7340c09b339573ce661fe2a922a1fc61e1b998f795439834de66f33dd470fe86891f3336ef2e7efe54927b3359

Score

10^/10

masslogger collection evasion ransomware spyware stealer

Malware Config

Extracted

Path

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

Family

masslogger

Ransom Note

################################################################# MassLogger v2.0.0.0 ################################################################# ### 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: 5/24/2022 11:24:42 PM MassLogger Started: 5/24/2022 11:24:27 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Purchae required and shipment details.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 6 IoCs

resource	yara_rule
behavioral1/memory/944-64-0x0000000000489ADE-mapping.dmp	family_masslogger
behavioral1/memory/944-63-0x0000000000400000-0x000000000048E000-memory.dmp	family_masslogger
behavioral1/memory/944-66-0x0000000000400000-0x000000000048E000-memory.dmp	family_masslogger
behavioral1/memory/944-68-0x0000000000400000-0x000000000048E000-memory.dmp	family_masslogger
behavioral1/memory/944-62-0x0000000000400000-0x000000000048E000-memory.dmp	family_masslogger
behavioral1/memory/944-61-0x0000000000400000-0x000000000048E000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

Modifies visibility of file extensions in Explorer 2 TTPs
evasion

Hidden Files and Directories
T1158

Modify Registry
T1112

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-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation	Purchae required and shipment details.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 opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Purchae required and shipment details.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Purchae required and shipment details.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Purchae required and shipment details.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Purchae required and shipment details.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Purchae required and shipment details.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Purchae required and shipment details.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.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
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1192 set thread context of 944	1192	Purchae required and shipment details.exe	28

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
944	Purchae required and shipment details.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	944	Purchae required and shipment details.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1192 wrote to memory of 944	1192	Purchae required and shipment details.exe	28
PID 1192 wrote to memory of 944	1192	Purchae required and shipment details.exe	28
PID 1192 wrote to memory of 944	1192	Purchae required and shipment details.exe	28
PID 1192 wrote to memory of 944	1192	Purchae required and shipment details.exe	28
PID 1192 wrote to memory of 944	1192	Purchae required and shipment details.exe	28
PID 1192 wrote to memory of 944	1192	Purchae required and shipment details.exe	28
PID 1192 wrote to memory of 944	1192	Purchae required and shipment details.exe	28
PID 1192 wrote to memory of 944	1192	Purchae required and shipment details.exe	28
PID 1192 wrote to memory of 944	1192	Purchae required and shipment details.exe	28

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchae required and shipment details.exe

C:\Users\Admin\AppData\Local\Temp\Purchae required and shipment details.exe
"C:\Users\Admin\AppData\Local\Temp\Purchae required and shipment details.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1192
- C:\Users\Admin\AppData\Local\Temp\Purchae required and shipment details.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:944

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

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

Loading Replay Monitor...

Downloads

memory/944-62-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/944-68-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/944-72-0x00000000008B5000-0x00000000008C6000-memory.dmp

Filesize
68KB

Download
memory/944-71-0x0000000000740000-0x0000000000754000-memory.dmp

Filesize
80KB

Download
memory/944-58-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/944-69-0x00000000006A0000-0x00000000006E4000-memory.dmp

Filesize
272KB

Download
memory/944-66-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/944-63-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/944-59-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/944-61-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1192-54-0x0000000001220000-0x00000000012C6000-memory.dmp

Filesize
664KB

Download
memory/1192-55-0x0000000076011000-0x0000000076013000-memory.dmp

Filesize
8KB

Download
memory/1192-57-0x0000000007F10000-0x0000000007FA6000-memory.dmp

Filesize
600KB

Download
memory/1192-56-0x0000000000300000-0x0000000000308000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing