masslogger | 9f377c8709ba71efaa74d270b7a4c98f44ea62847c66d2e54a1d1044bb8a2577

General

Target

Invoice.exe
Size

818KB
MD5

922902037e92ce7c5297054a629f1ef5
SHA1

59ca48a0edf12bd54e7a7e956e3ded80f75cada5
SHA256

37eb096457c5f3b81945f57de1b46674cdd7ccf83714f0bc4c0d982ade2405bd
SHA512

ec101fb291b663b9916b9d056e0f10564e12d44c747cd3b5e2f1b93bce07073a0deb1b9e1c041c549d4381a254c2db9c72ce50258fec82e4dfd23faa159ab80e

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 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: 5/21/2022 2:03:23 PM MassLogger Started: 5/21/2022 2:03:16 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Invoice.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 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	Invoice.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-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Invoice.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Invoice.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Invoice.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 1840 set thread context of 240	1840	Invoice.exe	28

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1840	Invoice.exe
1840	Invoice.exe
240	Invoice.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1840	Invoice.exe
Token: SeDebugPrivilege	240	Invoice.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1840 wrote to memory of 240	1840	Invoice.exe	28
PID 1840 wrote to memory of 240	1840	Invoice.exe	28
PID 1840 wrote to memory of 240	1840	Invoice.exe	28
PID 1840 wrote to memory of 240	1840	Invoice.exe	28
PID 1840 wrote to memory of 240	1840	Invoice.exe	28
PID 1840 wrote to memory of 240	1840	Invoice.exe	28
PID 1840 wrote to memory of 240	1840	Invoice.exe	28
PID 1840 wrote to memory of 240	1840	Invoice.exe	28
PID 1840 wrote to memory of 240	1840	Invoice.exe	28

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	Invoice.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	Invoice.exe

C:\Users\Admin\AppData\Local\Temp\Invoice.exe
"C:\Users\Admin\AppData\Local\Temp\Invoice.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1840
- C:\Users\Admin\AppData\Local\Temp\Invoice.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:240

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/240-69-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/240-73-0x0000000004A95000-0x0000000004AA6000-memory.dmp

Filesize
68KB

Download
memory/240-72-0x0000000000690000-0x00000000006A4000-memory.dmp

Filesize
80KB

Download
memory/240-70-0x0000000000840000-0x0000000000884000-memory.dmp

Filesize
272KB

Download
memory/240-59-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/240-67-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/240-64-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/240-63-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/240-62-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/240-60-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1840-55-0x00000000751C1000-0x00000000751C3000-memory.dmp

Filesize
8KB

Download
memory/1840-54-0x0000000000CF0000-0x0000000000DC2000-memory.dmp

Filesize
840KB

Download
memory/1840-58-0x0000000005730000-0x00000000057BE000-memory.dmp

Filesize
568KB

Download
memory/1840-57-0x00000000052C0000-0x0000000005356000-memory.dmp

Filesize
600KB

Download
memory/1840-56-0x00000000003E0000-0x00000000003F0000-memory.dmp

Filesize
64KB

Download

Analysis

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