masslogger | 27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45

General

Target

27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe
Size

994KB
MD5

87b19be58879f1fc7052851a1a9192ff
SHA1

ec586f8577f60677e9fc2ca9fe53174169f19c60
SHA256

27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45
SHA512

1fcab9718ba6b2011e50a64ce59b03cb8a69cb523d4ad7dac56b1bc9e95740da38cab01311c0e591e341dfd8e87f040dbe00b21e95077c19172b770bde9b0cc7

Score

10^/10

masslogger collection persistence ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\79FE0CC911\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.3.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 Location: United States OS: Microsoft Windows 7 Ultimate 64bit CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/24/2022 4:13:15 PM MassLogger Started: 5/24/2022 4:13:04 PM Interval: 2 hour MassLogger Process: C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe As Administrator: True

Extracted

Credentials

Protocol: smtp
Host:
smtp.privateemail.com
Port:
587
Username:
info@aksayyanggin.com
Password:
1234567890$$

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
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-1-5-21-1819626980-2277161760-1023733287-1000\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-1-5-21-1819626980-2277161760-1023733287-1000\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 queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\ArzQT = "C:\\TBHNEBSE\\ArzQTu\\ArzQTujHU.vbs"	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.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

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe

description	pid	process	target process
PID 852 set thread context of 1004	852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe	RegAsm.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

RegAsm.exe

pid process

1004 RegAsm.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

RegAsm.exe

pid process

1004 RegAsm.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe

pid process

852 27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 1004 RegAsm.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegAsm.exe

pid process

1004 RegAsm.exe

pid	process
1004	RegAsm.exe

pid	process
1004	RegAsm.exe

pid	process
852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe

description	pid	process
Token: SeDebugPrivilege	1004	RegAsm.exe

pid	process
1004	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe

description	pid	process	target process
PID 852 wrote to memory of 1004	852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe	RegAsm.exe
PID 852 wrote to memory of 1004	852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe	RegAsm.exe
PID 852 wrote to memory of 1004	852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe	RegAsm.exe
PID 852 wrote to memory of 1004	852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe	RegAsm.exe
PID 852 wrote to memory of 1004	852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe	RegAsm.exe
PID 852 wrote to memory of 1004	852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe	RegAsm.exe
PID 852 wrote to memory of 1004	852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe	RegAsm.exe
PID 852 wrote to memory of 1004	852	27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe	RegAsm.exe

outlook_office_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\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-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe
"C:\Users\Admin\AppData\Local\Temp\27938e39910afbdc569c8a629736b4c0bbfdf2573d01d12664bf05661074df45.exe"
1⤵
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:852

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:1004

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

1

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

memory/852-54-0x00000000001E0000-0x00000000002DE000-memory.dmp

Filesize
1016KB

Download
memory/852-55-0x0000000004BA0000-0x0000000004C9A000-memory.dmp

Filesize
1000KB

Download
memory/852-56-0x0000000004390000-0x000000000444E000-memory.dmp

Filesize
760KB

Download
memory/852-58-0x0000000001FA0000-0x0000000001FA3000-memory.dmp

Filesize
12KB

Download
memory/1004-57-0x00000000004A1B3E-mapping.dmp

Download
memory/1004-59-0x0000000076781000-0x0000000076783000-memory.dmp

Filesize
8KB

Download
memory/1004-60-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1004-61-0x0000000005220000-0x0000000005264000-memory.dmp

Filesize
272KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads