masslogger | 4f1384b82b65febe08b4589e556b8637ab71453fcec2329294f8fe7354ee48a4

General

Target

Outstanding PO - 14-Jun-2020.exe
Size

823KB
MD5

7d1562810fa826af4ddcf7048be36b11
SHA1

ea6c3ea9459c9fb8102ac5489a37f2e0c7fa999a
SHA256

8caf81f11bf9898ce2e1e91ed450197ae089f1088c666a2d665ae589ceb12a7e
SHA512

01152782402d1dfcfae3fae20c37527896d0cd3e5dc8026a7accf3f1ae16dd71e78152067c5eacf810447a74438ef042b265c319ce525557bd55a6c6b8be15c0

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 v1.3.7.1 ################################################################# ### 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 3:08:56 PM MassLogger Started: 5/21/2022 3:08:38 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Outstanding PO - 14-Jun-2020.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/1956-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1956-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1956-65-0x00000000004A2D7E-mapping.dmp	family_masslogger
behavioral1/memory/1956-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1956-67-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1956-69-0x0000000000400000-0x00000000004A8000-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/964-56-0x0000000004D80000-0x0000000004E2E000-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:

Outstanding PO - 14-Jun-2020.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation	Outstanding PO - 14-Jun-2020.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:

Outstanding PO - 14-Jun-2020.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Outstanding PO - 14-Jun-2020.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Outstanding PO - 14-Jun-2020.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Outstanding PO - 14-Jun-2020.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Outstanding PO - 14-Jun-2020.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Outstanding PO - 14-Jun-2020.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Outstanding PO - 14-Jun-2020.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Outstanding PO - 14-Jun-2020.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Outstanding PO - 14-Jun-2020.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Outstanding PO - 14-Jun-2020.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Outstanding PO - 14-Jun-2020.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Outstanding PO - 14-Jun-2020.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Outstanding PO - 14-Jun-2020.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Outstanding PO - 14-Jun-2020.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Outstanding PO - 14-Jun-2020.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Outstanding PO - 14-Jun-2020.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:

Outstanding PO - 14-Jun-2020.exe

description pid process target process

PID 964 set thread context of 1956 964 Outstanding PO - 14-Jun-2020.exe Outstanding PO - 14-Jun-2020.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

1836 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

Outstanding PO - 14-Jun-2020.exe

pid process

1956 Outstanding PO - 14-Jun-2020.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Outstanding PO - 14-Jun-2020.exe

pid process

1956 Outstanding PO - 14-Jun-2020.exe
1956 Outstanding PO - 14-Jun-2020.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Outstanding PO - 14-Jun-2020.exe

description pid process

Token: SeDebugPrivilege 1956 Outstanding PO - 14-Jun-2020.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Outstanding PO - 14-Jun-2020.exe

pid process

1956 Outstanding PO - 14-Jun-2020.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 964 set thread context of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe

pid	process
1836	schtasks.exe

pid	process
1956	Outstanding PO - 14-Jun-2020.exe

pid	process
1956	Outstanding PO - 14-Jun-2020.exe
1956	Outstanding PO - 14-Jun-2020.exe

description	pid	process
Token: SeDebugPrivilege	1956	Outstanding PO - 14-Jun-2020.exe

pid	process
1956	Outstanding PO - 14-Jun-2020.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Outstanding PO - 14-Jun-2020.exe

description	pid	process	target process
PID 964 wrote to memory of 1836	964	Outstanding PO - 14-Jun-2020.exe	schtasks.exe
PID 964 wrote to memory of 1836	964	Outstanding PO - 14-Jun-2020.exe	schtasks.exe
PID 964 wrote to memory of 1836	964	Outstanding PO - 14-Jun-2020.exe	schtasks.exe
PID 964 wrote to memory of 1836	964	Outstanding PO - 14-Jun-2020.exe	schtasks.exe
PID 964 wrote to memory of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe
PID 964 wrote to memory of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe
PID 964 wrote to memory of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe
PID 964 wrote to memory of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe
PID 964 wrote to memory of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe
PID 964 wrote to memory of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe
PID 964 wrote to memory of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe
PID 964 wrote to memory of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe
PID 964 wrote to memory of 1956	964	Outstanding PO - 14-Jun-2020.exe	Outstanding PO - 14-Jun-2020.exe

outlook_office_path 1 IoCs

Processes:

Outstanding PO - 14-Jun-2020.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	Outstanding PO - 14-Jun-2020.exe

outlook_win_path 1 IoCs

Processes:

Outstanding PO - 14-Jun-2020.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	Outstanding PO - 14-Jun-2020.exe

C:\Users\Admin\AppData\Local\Temp\Outstanding PO - 14-Jun-2020.exe
"C:\Users\Admin\AppData\Local\Temp\Outstanding PO - 14-Jun-2020.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:964

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\wTsrvEKyiYD" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCAF.tmp"
2⤵
- Creates scheduled task(s)
PID:1836

C:\Users\Admin\AppData\Local\Temp\Outstanding PO - 14-Jun-2020.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:1956

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\tmpCAF.tmp
Filesize
1KB

MD5
e01bc2ef600e4cdf8210fc66df086348

SHA1
d2307226a6309d303d7fc927946910096c2f7f2b

SHA256
3cfa3e0add5e1e23f0fb83d77377c53ad52e95a6ecca179b987338ceaa89b9a2

SHA512
e43d078bd201ffaf430373080d7133af03eb3607e401b4db1941eb81f885f9f63816f7cf5f74f31198459b8221f0bc335e2bf477a785bdf815ef3b5f93a8b16c

Download Submit
memory/964-54-0x0000000000800000-0x00000000008D4000-memory.dmp

Filesize
848KB

Download
memory/964-55-0x0000000000470000-0x0000000000480000-memory.dmp

Filesize
64KB

Download
memory/964-56-0x0000000004D80000-0x0000000004E2E000-memory.dmp

Filesize
696KB

Download
memory/1836-57-0x0000000000000000-mapping.dmp

Download
memory/1956-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1956-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1956-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1956-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1956-65-0x00000000004A2D7E-mapping.dmp

Download
memory/1956-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1956-67-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1956-69-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1956-70-0x0000000000360000-0x00000000003A4000-memory.dmp

Filesize
272KB

Download
memory/1956-71-0x00000000751C1000-0x00000000751C3000-memory.dmp

Filesize
8KB

Download
memory/1956-72-0x0000000004D95000-0x0000000004DA6000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads