masslogger | 24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2

General

Target

24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe
Size

1.3MB
MD5

f79e94d065c88a840d376851c4e19937
SHA1

ca0ad59a5ab54d088190efb2497f65f2df413ce9
SHA256

24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2
SHA512

4632eb61180da1d386fa5a815dd0a411db786f145cd43a5ca8851a119534c19b6a18992baa02335d8a00499ec33ba47c2c929fc2fb5a045275f4d0df4a63e6e7

Score

10^/10

masslogger collection ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\AEF946DCB4\Log.txt

Family

masslogger

Ransom Note

<|| v2.1.0.0 ||> 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: 5/20/2022 9:32:02 AM MassLogger Started: 5/20/2022 9:31:54 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RegAsm.exe MassLogger Melt: false MassLogger Exit after delivery: true As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> Disabled <|| Downloader ||> Disabled <|| Bot Killer ||> Disabled <|| Window Searcher ||> 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 ||> Disabled

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.

Processes:

yara_rule

masslogger_log_file
Executes dropped EXE 1 IoCs

Processes:

RegAsm.exe

pid process

1684 RegAsm.exe
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
Loads dropped DLL 2 IoCs

Processes:

24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exeRegAsm.exe

pid process

1376 24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe
1684 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

pid	process
1684	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

Accesses Microsoft Outlook profiles 1 TTPs 35 IoCs

collection

Email Collection

T1114

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	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	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 created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\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\Office\18.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\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\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\Office\16.0\Outlook\Profiles\Outlook	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\17.0\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 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\Office\18.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook	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
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 created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook	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 created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\20.0\Outlook\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 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\Office\17.0\Outlook\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:

24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe

description	pid	process	target process
PID 1376 set thread context of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exeRegAsm.exe

pid	process
1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe
1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe
1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe
1684	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exeRegAsm.exe

description	pid	process
Token: SeDebugPrivilege	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe
Token: SeDebugPrivilege	1684	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe

description	pid	process	target process
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe	RegAsm.exe
PID 1376 wrote to memory of 1684	1376	24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.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\20.0\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\24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe
"C:\Users\Admin\AppData\Local\Temp\24a3ea7a878ccdda1d5151f6e892a16bf0c52082c36350d451d348983b80fdf2.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1376

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
2⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1684

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

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
memory/1376-56-0x0000000000500000-0x000000000050A000-memory.dmp

Filesize
40KB

Download
memory/1376-57-0x0000000000640000-0x000000000064A000-memory.dmp

Filesize
40KB

Download
memory/1376-55-0x0000000000340000-0x000000000035E000-memory.dmp

Filesize
120KB

Download
memory/1376-54-0x0000000000E40000-0x0000000000F86000-memory.dmp

Filesize
1.3MB

Download
memory/1684-79-0x0000000000710000-0x0000000000754000-memory.dmp

Filesize
272KB

Download
memory/1684-81-0x0000000000DF0000-0x0000000000E04000-memory.dmp

Filesize
80KB

Download
memory/1684-67-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download
memory/1684-63-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download
memory/1684-68-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download
memory/1684-72-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download
memory/1684-75-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download
memory/1684-62-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download
memory/1684-77-0x0000000075AE1000-0x0000000075AE3000-memory.dmp

Filesize
8KB

Download
memory/1684-60-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download
memory/1684-59-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download
memory/1684-80-0x0000000000755000-0x0000000000766000-memory.dmp

Filesize
68KB

Download
memory/1684-65-0x00000000004940CE-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads