masslogger | 3d6c42cafbbcb96f6bd42158290f51c6bc6b9ea7470fe27a9326f998acea91ea

General

Target

Attached Products Inquiry.doc.z.exe
Size

883KB
MD5

f2209b14ae0829869f16b7dc0c78c813
SHA1

987e30e37d99b08d9d22e199108893cf01ee24a9
SHA256

8fd65d51cacf70ad39a95d0c7e89af58c406bce0a61f1365ba7889475e0e1218
SHA512

8bbf5abcdf24e3aefc20416bc5b7afe89549aa42c5b28e05fb7a009bbed0a3651d7240d84fc7b44fad9b6fc8857d93f36f5b0f2d93f923918a85e5a90b5f17c9

Score

10^/10

masslogger collection ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\8236ADF044\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.5.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.50 Location: United States OS: Microsoft Windows 10 Pro64bit CPU: Intel Core Processor (Broadwell) GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 6:43:18 AM MassLogger Started: 5/21/2022 6:42:39 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Attached Products Inquiry.doc.z.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 32 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2004-137-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-139-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-141-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-143-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-145-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-147-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-149-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-151-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-153-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-155-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-157-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-161-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-159-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-163-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-165-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-167-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-169-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-171-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-173-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-175-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-177-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-179-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-181-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-183-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-185-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-187-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-189-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-191-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-193-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-195-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-197-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral2/memory/2004-199-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger

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

Processes:

yara_rule

masslogger_log_file

yara_rule
masslogger_log_file

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Attached Products Inquiry.doc.z.exeAttached Products Inquiry.doc.z.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	Attached Products Inquiry.doc.z.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	Attached Products Inquiry.doc.z.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 18 IoCs

collection

Email Collection

T1114

Processes:

Attached Products Inquiry.doc.z.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Attached Products Inquiry.doc.z.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Attached Products Inquiry.doc.z.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Attached Products Inquiry.doc.z.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Attached Products Inquiry.doc.z.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Attached Products Inquiry.doc.z.exe
Key queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Attached Products Inquiry.doc.z.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key opened	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe

Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

45 api.ipify.org
46 api.ipify.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

Attached Products Inquiry.doc.z.exe

description pid process target process

PID 4084 set thread context of 2004 4084 Attached Products Inquiry.doc.z.exe Attached Products Inquiry.doc.z.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4332 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

Attached Products Inquiry.doc.z.exe

pid process

2004 Attached Products Inquiry.doc.z.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Attached Products Inquiry.doc.z.exe

description pid process

Token: SeDebugPrivilege 2004 Attached Products Inquiry.doc.z.exe

flow	ioc
45	api.ipify.org
46	api.ipify.org

description	pid	process	target process
PID 4084 set thread context of 2004	4084	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe

pid	process
4332	schtasks.exe

pid	process
2004	Attached Products Inquiry.doc.z.exe

description	pid	process
Token: SeDebugPrivilege	2004	Attached Products Inquiry.doc.z.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

Attached Products Inquiry.doc.z.exe

description	pid	process	target process
PID 4084 wrote to memory of 4332	4084	Attached Products Inquiry.doc.z.exe	schtasks.exe
PID 4084 wrote to memory of 4332	4084	Attached Products Inquiry.doc.z.exe	schtasks.exe
PID 4084 wrote to memory of 4332	4084	Attached Products Inquiry.doc.z.exe	schtasks.exe
PID 4084 wrote to memory of 2004	4084	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 4084 wrote to memory of 2004	4084	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 4084 wrote to memory of 2004	4084	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 4084 wrote to memory of 2004	4084	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 4084 wrote to memory of 2004	4084	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 4084 wrote to memory of 2004	4084	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 4084 wrote to memory of 2004	4084	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 4084 wrote to memory of 2004	4084	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe

outlook_office_path 1 IoCs

Processes:

Attached Products Inquiry.doc.z.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe

outlook_win_path 1 IoCs

Processes:

Attached Products Inquiry.doc.z.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Attached Products Inquiry.doc.z.exe

C:\Users\Admin\AppData\Local\Temp\Attached Products Inquiry.doc.z.exe
"C:\Users\Admin\AppData\Local\Temp\Attached Products Inquiry.doc.z.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4084

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mqXpsxyxVHpNX" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8C52.tmp"
2⤵
- Creates scheduled task(s)
PID:4332

C:\Users\Admin\AppData\Local\Temp\Attached Products Inquiry.doc.z.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:2004

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8C52.tmp
Filesize
1KB

MD5
c94c3422a87ce6d52c7566680b476df8

SHA1
a94b00f661072c3fbe894cca2adea832db0d5a6a

SHA256
6ad03cd4f541098b93fe48d65f0bd241b80bed29a5e070e14775fb67212c5427

SHA512
36b407bae4ca31dc35a2cd3a56bd944b3df02e210c9fbc794f80941b82310297c41f36013511f6ce756f3bfa84b761b140ff2cec8b778c2f08b47b794fbcd303

Download Submit
memory/2004-163-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-139-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-650-0x0000000007100000-0x0000000007150000-memory.dmp

Filesize
320KB

Download
memory/2004-165-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-649-0x0000000006FB0000-0x0000000006FBA000-memory.dmp

Filesize
40KB

Download
memory/2004-169-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-137-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-167-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-141-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-143-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-145-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-147-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-149-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-151-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-153-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-155-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-157-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-161-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-159-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-648-0x00000000057B0000-0x0000000005816000-memory.dmp

Filesize
408KB

Download
memory/2004-199-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-197-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-136-0x0000000000000000-mapping.dmp

Download
memory/2004-171-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-173-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-175-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-177-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-179-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-181-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-183-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-185-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-187-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-189-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-191-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-193-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/2004-195-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/4084-132-0x00000000059A0000-0x0000000005A32000-memory.dmp

Filesize
584KB

Download
memory/4084-130-0x0000000000DA0000-0x0000000000E84000-memory.dmp

Filesize
912KB

Download
memory/4084-131-0x0000000005820000-0x00000000058BC000-memory.dmp

Filesize
624KB

Download
memory/4084-133-0x0000000007970000-0x0000000007F14000-memory.dmp

Filesize
5.6MB

Download
memory/4332-134-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads