masslogger | be6bfae253ef0ad8688f9c99e4e5e5e091eb23ff84c1041553b82618292fabf3

Analysis

max time kernel
120s
max time network
134s
platform
windows7_x64
resource
win7-20220414-en
submitted
21-05-2022 02:13

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General

Target

F20794-送銀行_xls.exe
Size

828KB
MD5

85f371fdbe9b8f2d020e2d524f7cab4f
SHA1

cd71ea891aea2af7714c9a615de72515bfb390e5
SHA256

a760f527a357c0102eb9d9ecc6ca76f245d34237b230ce9a38e83ae806ab13cb
SHA512

39398504ecdd905054244d8052d82d86a74fbba209a7e8a32e946311f4b573f36f95952448732368a93fb5b8f3d78603798f03a9525450e1825a24071c62d972

Score

10^/10

masslogger collection ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\3B8E3C2477\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.2.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.50 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: 5/21/2022 5:22:52 AM MassLogger Started: 5/21/2022 5:22:40 AM Interval: 6 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\F20794-送銀行_xls.exe As Administrator: True

Extracted

Credentials

Protocol: smtp
Host:
smtp.yandex.com
Port:
587
Username:
[email protected]
Password:
evra12345

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger Main Payload 33 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1892-60-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-61-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-62-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-63-0x00000000004A1E3E-mapping.dmp	family_masslogger
behavioral1/memory/1892-65-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-67-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-69-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-71-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-73-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-75-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-77-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-79-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-81-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-83-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-85-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-87-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-89-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-91-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-93-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-95-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-97-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-99-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-101-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-103-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-105-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-107-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-109-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-111-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-113-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-115-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-117-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-119-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/1892-121-0x0000000000400000-0x00000000004A6000-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/336-56-0x0000000006790000-0x000000000683E000-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:

F20794-送銀行_xls.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation	F20794-送銀行_xls.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:

F20794-送銀行_xls.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	F20794-送銀行_xls.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	F20794-送銀行_xls.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	F20794-送銀行_xls.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	F20794-送銀行_xls.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	F20794-送銀行_xls.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	F20794-送銀行_xls.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.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:

F20794-送銀行_xls.exe

description pid process target process

PID 336 set thread context of 1892 336 F20794-送銀行_xls.exe F20794-送銀行_xls.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

F20794-送銀行_xls.exe

pid process

1892 F20794-送銀行_xls.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

F20794-送銀行_xls.exe

pid process

1892 F20794-送銀行_xls.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

F20794-送銀行_xls.exe

description pid process

Token: SeDebugPrivilege 1892 F20794-送銀行_xls.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

F20794-送銀行_xls.exe

pid process

1892 F20794-送銀行_xls.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 336 set thread context of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe

pid	process
1892	F20794-送銀行_xls.exe

pid	process
1892	F20794-送銀行_xls.exe

description	pid	process
Token: SeDebugPrivilege	1892	F20794-送銀行_xls.exe

pid	process
1892	F20794-送銀行_xls.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

F20794-送銀行_xls.exe

description	pid	process	target process
PID 336 wrote to memory of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe
PID 336 wrote to memory of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe
PID 336 wrote to memory of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe
PID 336 wrote to memory of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe
PID 336 wrote to memory of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe
PID 336 wrote to memory of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe
PID 336 wrote to memory of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe
PID 336 wrote to memory of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe
PID 336 wrote to memory of 1892	336	F20794-送銀行_xls.exe	F20794-送銀行_xls.exe

outlook_office_path 1 IoCs

Processes:

F20794-送銀行_xls.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe

outlook_win_path 1 IoCs

Processes:

F20794-送銀行_xls.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	F20794-送銀行_xls.exe

C:\Users\Admin\AppData\Local\Temp\F20794-送銀行_xls.exe
"C:\Users\Admin\AppData\Local\Temp\F20794-送銀行_xls.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:336
- C:\Users\Admin\AppData\Local\Temp\F20794-送銀行_xls.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:1892

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/336-54-0x0000000001100000-0x00000000011D6000-memory.dmp

Filesize
856KB

Download
memory/336-55-0x00000000003A0000-0x00000000003B0000-memory.dmp

Filesize
64KB

Download
memory/336-56-0x0000000006790000-0x000000000683E000-memory.dmp

Filesize
696KB

Download
memory/1892-57-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-58-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-60-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-61-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-62-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-63-0x00000000004A1E3E-mapping.dmp

Download
memory/1892-65-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-67-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-69-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-71-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-73-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-75-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-77-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-79-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-81-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-83-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-85-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-87-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-89-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-91-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-93-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-95-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-97-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-99-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-101-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-103-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-105-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-107-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-109-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-111-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-113-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-115-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-117-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-119-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-121-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1892-569-0x0000000000A10000-0x0000000000A54000-memory.dmp

Filesize
272KB

Download