masslogger | 644c9cf4829eb937cbecbeac43175b720a36c38d9cb3fbee3e22346f08fd8b33

General

Target

Tech7 A S Profile.exe
Size

980KB
MD5

75de41ae05708e3574b8e734996eb88f
SHA1

5a545c6edf90ccedea8387d8f5040f97b9e68bbe
SHA256

083c70afde1be48426ebcf28eacfa0cd47f96130790b79f5a367ae6b00eab142
SHA512

f9c7bb8712cc3b9cffaa56b10091b28d05af3a59a344a29f6132c280626fadff738a14a9bcf325865ac480a60baa6d5e54575c58c8427c78ad3c841178d4235a

Score

10^/10

masslogger collection ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

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

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.7.0 ################################################################# ### 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 3:08:57 PM MassLogger Started: 5/21/2022 3:08:39 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Tech7 A S Profile.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 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/844-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/844-65-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/844-66-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/844-67-0x00000000004A301E-mapping.dmp	family_masslogger
behavioral1/memory/844-69-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/844-71-0x0000000000400000-0x00000000004A8000-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

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1284-58-0x0000000004CA0000-0x0000000004D50000-memory.dmp	rezer0

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:

Tech7 A S Profile.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation	Tech7 A S Profile.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

Processes:

Tech7 A S Profile.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Tech7 A S Profile.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Tech7 A S Profile.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Tech7 A S Profile.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Tech7 A S Profile.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Tech7 A S Profile.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Tech7 A S Profile.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Tech7 A S Profile.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Tech7 A S Profile.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Tech7 A S Profile.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Tech7 A S Profile.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Tech7 A S Profile.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Tech7 A S Profile.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Tech7 A S Profile.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Tech7 A S Profile.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Tech7 A S Profile.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
Suspicious use of SetThreadContext 1 IoCs

Processes:

Tech7 A S Profile.exe

description pid process target process

PID 1284 set thread context of 844 1284 Tech7 A S Profile.exe Tech7 A S Profile.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

1524 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

Tech7 A S Profile.exe

pid process

844 Tech7 A S Profile.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

Tech7 A S Profile.exeTech7 A S Profile.exe

pid process

1284 Tech7 A S Profile.exe
1284 Tech7 A S Profile.exe
844 Tech7 A S Profile.exe
844 Tech7 A S Profile.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Tech7 A S Profile.exeTech7 A S Profile.exe

description pid process

Token: SeDebugPrivilege 1284 Tech7 A S Profile.exe
Token: SeDebugPrivilege 844 Tech7 A S Profile.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Tech7 A S Profile.exe

pid process

844 Tech7 A S Profile.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 1284 set thread context of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe

pid	process
1524	schtasks.exe

pid	process
844	Tech7 A S Profile.exe

pid	process
1284	Tech7 A S Profile.exe
1284	Tech7 A S Profile.exe
844	Tech7 A S Profile.exe
844	Tech7 A S Profile.exe

description	pid	process
Token: SeDebugPrivilege	1284	Tech7 A S Profile.exe
Token: SeDebugPrivilege	844	Tech7 A S Profile.exe

pid	process
844	Tech7 A S Profile.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Tech7 A S Profile.exe

description	pid	process	target process
PID 1284 wrote to memory of 1524	1284	Tech7 A S Profile.exe	schtasks.exe
PID 1284 wrote to memory of 1524	1284	Tech7 A S Profile.exe	schtasks.exe
PID 1284 wrote to memory of 1524	1284	Tech7 A S Profile.exe	schtasks.exe
PID 1284 wrote to memory of 1524	1284	Tech7 A S Profile.exe	schtasks.exe
PID 1284 wrote to memory of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe
PID 1284 wrote to memory of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe
PID 1284 wrote to memory of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe
PID 1284 wrote to memory of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe
PID 1284 wrote to memory of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe
PID 1284 wrote to memory of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe
PID 1284 wrote to memory of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe
PID 1284 wrote to memory of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe
PID 1284 wrote to memory of 844	1284	Tech7 A S Profile.exe	Tech7 A S Profile.exe

outlook_office_path 1 IoCs

Processes:

Tech7 A S Profile.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	Tech7 A S Profile.exe

outlook_win_path 1 IoCs

Processes:

Tech7 A S Profile.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	Tech7 A S Profile.exe

C:\Users\Admin\AppData\Local\Temp\Tech7 A S Profile.exe
"C:\Users\Admin\AppData\Local\Temp\Tech7 A S Profile.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1284

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\BbJsPf" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5C35.tmp"
2⤵
- Creates scheduled task(s)
PID:1524

C:\Users\Admin\AppData\Local\Temp\Tech7 A S Profile.exe
"{path}"
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:844

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp5C35.tmp
Filesize
1KB

MD5
e836f8dcce22ae434e5df1c726d96a3b

SHA1
2bfcb99806a602d8b80c61784a068c316e7e89dc

SHA256
74c9a30cc4e29df18ace1a7b25cebd0a60821acc903748fd3f25f28de97206cd

SHA512
04d78188c3f864caad929e5acd286802eb83c041f85ad459d283eaa031eeaf492e33830350fb2ee3fc21e3ee8c8ed569610c3a117f8e259e45413c3bfb63daef

Download Submit
memory/844-67-0x00000000004A301E-mapping.dmp

Download
memory/844-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/844-74-0x0000000004FD5000-0x0000000004FE6000-memory.dmp

Filesize
68KB

Download
memory/844-72-0x00000000003C0000-0x0000000000404000-memory.dmp

Filesize
272KB

Download
memory/844-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/844-71-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/844-69-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/844-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/844-66-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/844-65-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1284-54-0x0000000000E30000-0x0000000000F2C000-memory.dmp

Filesize
1008KB

Download
memory/1284-56-0x00000000759F1000-0x00000000759F3000-memory.dmp

Filesize
8KB

Download
memory/1284-55-0x0000000000D60000-0x0000000000E1E000-memory.dmp

Filesize
760KB

Download
memory/1284-58-0x0000000004CA0000-0x0000000004D50000-memory.dmp

Filesize
704KB

Download
memory/1284-57-0x00000000008C0000-0x00000000008C8000-memory.dmp

Filesize
32KB

Download
memory/1524-59-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads