masslogger | c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543

General

Target

c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Size

824KB
MD5

8b7df26c62ae59859e08096fd12cf199
SHA1

5879a5399d91a57d2327584ccce8b8654e60b642
SHA256

c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543
SHA512

ddba02b074af7b559d78b6d9423fdd7a4247f8f66a2d624605293a5789534c78e4e8dac9cc7c814970d14c338d906de71ef5951453a2911a800a0ac42a28e10d

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 v1.3.7.0 ################################################################# ### 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: 5/24/2022 4:58:40 PM MassLogger Started: 5/24/2022 4:58:33 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe MassLogger Melt: false MassLogger Exit after delivery: true As Administrator: True Processes:

Extracted

Credentials

Protocol: smtp
Host:
smtp.yandex.com
Port:
587
Username:
[email protected]
Password:
akachukwu123@

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/1720-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1720-61-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1720-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1720-64-0x00000000004A2AFE-mapping.dmp	family_masslogger
behavioral1/memory/1720-66-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1720-68-0x0000000000400000-0x00000000004A8000-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/812-57-0x0000000005C60000-0x0000000005D10000-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	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.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 created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.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 812 set thread context of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe	27

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1720	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1720	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 812 wrote to memory of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe	27
PID 812 wrote to memory of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe	27
PID 812 wrote to memory of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe	27
PID 812 wrote to memory of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe	27
PID 812 wrote to memory of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe	27
PID 812 wrote to memory of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe	27
PID 812 wrote to memory of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe	27
PID 812 wrote to memory of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe	27
PID 812 wrote to memory of 1720	812	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.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	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.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	c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe

C:\Users\Admin\AppData\Local\Temp\c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
"C:\Users\Admin\AppData\Local\Temp\c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:812
- C:\Users\Admin\AppData\Local\Temp\c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe
  "C:\Users\Admin\AppData\Local\Temp\c4ef4eccfd7797c2a7e0a26e237e9489e8ecdfa38d25e3d4d0b9f259470d8543.exe"
  2⤵
  - Checks computer location settings
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1720

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

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Downloads

memory/812-54-0x0000000000CB0000-0x0000000000D84000-memory.dmp

Filesize
848KB

Download
memory/812-55-0x0000000075FE1000-0x0000000075FE3000-memory.dmp

Filesize
8KB

Download
memory/812-56-0x0000000000380000-0x0000000000388000-memory.dmp

Filesize
32KB

Download
memory/812-57-0x0000000005C60000-0x0000000005D10000-memory.dmp

Filesize
704KB

Download
memory/1720-58-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1720-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1720-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1720-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1720-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1720-66-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1720-68-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1720-69-0x00000000006E0000-0x0000000000724000-memory.dmp

Filesize
272KB

Download
memory/1720-71-0x00000000004E5000-0x00000000004F6000-memory.dmp

Filesize
68KB

Download
memory/1720-72-0x0000000000820000-0x0000000000834000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads