masslogger | 0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7

General

Target

0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe
Size

801KB
MD5

acdf6a1ba69a3c47c10b477aca7573f8
SHA1

be7033f5e7ad87f70decc0d72dbce2a483f5852e
SHA256

0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7
SHA512

716810fba0d37906c9f8309c64a45f51764679c7c8a3c46df978aa94c82fc1708e9e04b478ead684ce07ae328790eb8ae4234f269aa57df4cdeaa9273b9d5859

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 v1.3.6.0 ################################################################# ### 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: 5/20/2022 7:56:43 AM MassLogger Started: 5/20/2022 7:56:20 AM Interval: 2 hour MassLogger Process: C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.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 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2000-60-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.

Processes:

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

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation RegAsm.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

yara_rule
masslogger_log_file

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

Accesses Microsoft Outlook profiles 1 TTPs 15 IoCs

collection

Email Collection

T1114

Processes:

RegAsm.exe

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

Processes:

flow ioc

4 api.ipify.org

flow	ioc
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

Processes:

0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe

description	pid	process	target process
PID 1988 set thread context of 2000	1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe	RegAsm.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

RegAsm.exe

pid process

2000 RegAsm.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RegAsm.exe

pid process

2000 RegAsm.exe
2000 RegAsm.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe

pid process

1988 0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 2000 RegAsm.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegAsm.exe

pid process

2000 RegAsm.exe

pid	process
2000	RegAsm.exe

pid	process
2000	RegAsm.exe
2000	RegAsm.exe

pid	process
1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe

description	pid	process
Token: SeDebugPrivilege	2000	RegAsm.exe

pid	process
2000	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe

description	pid	process	target process
PID 1988 wrote to memory of 2000	1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe	RegAsm.exe
PID 1988 wrote to memory of 2000	1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe	RegAsm.exe
PID 1988 wrote to memory of 2000	1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe	RegAsm.exe
PID 1988 wrote to memory of 2000	1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe	RegAsm.exe
PID 1988 wrote to memory of 2000	1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe	RegAsm.exe
PID 1988 wrote to memory of 2000	1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe	RegAsm.exe
PID 1988 wrote to memory of 2000	1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe	RegAsm.exe
PID 1988 wrote to memory of 2000	1988	0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe	RegAsm.exe

outlook_office_path 1 IoCs

Processes:

RegAsm.exe

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

outlook_win_path 1 IoCs

Processes:

RegAsm.exe

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	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe
"C:\Users\Admin\AppData\Local\Temp\0c88fe3c8c89f147793600dc852e380edf17219d55c84d9894420659ff81b6b7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1988

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.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:2000

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

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Downloads

memory/1988-54-0x0000000000330000-0x00000000003FE000-memory.dmp

Filesize
824KB

Download
memory/1988-55-0x0000000004840000-0x00000000048FA000-memory.dmp

Filesize
744KB

Download
memory/1988-56-0x0000000075501000-0x0000000075503000-memory.dmp

Filesize
8KB

Download
memory/1988-58-0x0000000000550000-0x0000000000553000-memory.dmp

Filesize
12KB

Download
memory/2000-57-0x00000000004AC92E-mapping.dmp

Download
memory/2000-60-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/2000-61-0x00000000009D0000-0x0000000000A14000-memory.dmp

Filesize
272KB

Download
memory/2000-62-0x00000000024A5000-0x00000000024B6000-memory.dmp

Filesize
68KB

Download
memory/2000-63-0x00000000022D0000-0x00000000022E4000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads