masslogger | a17bc17287de7be6a356c706e3ce9d558bda0f58b839bd4725f8d18040dfe1b4

General

Target

Payment AF 6252020_PDF.exe
Size

901KB
MD5

462d64b8cccac090d2d32c835ce36f32
SHA1

54b3ecf7515d602cf00ad219594e071bb874cc92
SHA256

be5e5be8981ef261f24b21b1d6b67f5041d10ecc3eb3697a67142d43e71c7ece
SHA512

cf53f6df2b445b1eb0b3b0309a5b5cd1a37f5e90135a161cbeb80eb662b6d95104d9083e62c4145203277b4fcfe45607fc07a7f80bc4fdced6c44f10cb751c43

Score

10^/10

masslogger collection ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

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

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.7.1 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 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 12:02:41 PM MassLogger Started: 5/21/2022 12:02:30 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Payment AF 6252020_PDF.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

resource	yara_rule
behavioral1/memory/2024-61-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2024-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2024-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2024-66-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2024-64-0x00000000004A2E6E-mapping.dmp	family_masslogger
behavioral1/memory/2024-68-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

ReZer0 packer 1 IoCs

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

rezer0

resource	yara_rule
behavioral1/memory/1564-57-0x0000000005290000-0x000000000533E000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	Payment AF 6252020_PDF.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

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Payment AF 6252020_PDF.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Payment AF 6252020_PDF.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Payment AF 6252020_PDF.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Payment AF 6252020_PDF.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Payment AF 6252020_PDF.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Payment AF 6252020_PDF.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.

flow	ioc
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1564 set thread context of 2024	1564	Payment AF 6252020_PDF.exe	27

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2024	Payment AF 6252020_PDF.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2024	Payment AF 6252020_PDF.exe
2024	Payment AF 6252020_PDF.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2024	Payment AF 6252020_PDF.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2024	Payment AF 6252020_PDF.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1564 wrote to memory of 2024	1564	Payment AF 6252020_PDF.exe	27
PID 1564 wrote to memory of 2024	1564	Payment AF 6252020_PDF.exe	27
PID 1564 wrote to memory of 2024	1564	Payment AF 6252020_PDF.exe	27
PID 1564 wrote to memory of 2024	1564	Payment AF 6252020_PDF.exe	27
PID 1564 wrote to memory of 2024	1564	Payment AF 6252020_PDF.exe	27
PID 1564 wrote to memory of 2024	1564	Payment AF 6252020_PDF.exe	27
PID 1564 wrote to memory of 2024	1564	Payment AF 6252020_PDF.exe	27
PID 1564 wrote to memory of 2024	1564	Payment AF 6252020_PDF.exe	27
PID 1564 wrote to memory of 2024	1564	Payment AF 6252020_PDF.exe	27

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Payment AF 6252020_PDF.exe

outlook_win_path 1 IoCs

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	Payment AF 6252020_PDF.exe

C:\Users\Admin\AppData\Local\Temp\Payment AF 6252020_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\Payment AF 6252020_PDF.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1564
- C:\Users\Admin\AppData\Local\Temp\Payment AF 6252020_PDF.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:2024

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

memory/1564-54-0x0000000000D20000-0x0000000000E08000-memory.dmp

Filesize
928KB

Download
memory/1564-55-0x0000000075CD1000-0x0000000075CD3000-memory.dmp

Filesize
8KB

Download
memory/1564-56-0x0000000000310000-0x0000000000320000-memory.dmp

Filesize
64KB

Download
memory/1564-57-0x0000000005290000-0x000000000533E000-memory.dmp

Filesize
696KB

Download
memory/2024-58-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2024-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2024-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2024-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2024-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2024-66-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2024-68-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2024-69-0x00000000004C0000-0x0000000000504000-memory.dmp

Filesize
272KB

Download
memory/2024-71-0x0000000004E25000-0x0000000004E36000-memory.dmp

Filesize
68KB

Download

Analysis

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