masslogger | 839c500fe9fff02c0c70cd65bfce456f9efec4301b7d75ee478af939a08397c6

General

Target

SCAN 65003.exe
Size

812KB
MD5

0dce144cf6bcc62ec95d72a1cf626152
SHA1

4e00c89eb674ba5b2713555598fa8f9514ce305e
SHA256

6953bac97a3acd3fb014255896b3a0abc540cc5104c5b387d73c3fe795e2a059
SHA512

8fad13060c2242f26140fded8a844bfbd31df5b35562149222540eab75d3a2ffb74a827a91fc57ff4ef82187ad39d5ad88de8bdc703b6baa1411a2777f704582

Score

10^/10

masslogger collection ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\8506BBE7FF\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.7.1 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.13 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 5:56:02 AM MassLogger Started: 5/21/2022 5:55:46 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\SCAN 65003.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/1964-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1964-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1964-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1964-65-0x00000000004A308E-mapping.dmp	family_masslogger
behavioral1/memory/1964-67-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1964-69-0x0000000000400000-0x00000000004A8000-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/1856-56-0x00000000065D0000-0x0000000006680000-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:

SCAN 65003.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Control Panel\International\Geo\Nation	SCAN 65003.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:

SCAN 65003.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	SCAN 65003.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe
Key queried	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	SCAN 65003.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe
Key queried	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe
Key queried	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	SCAN 65003.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	SCAN 65003.exe
Key queried	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	SCAN 65003.exe
Key queried	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe
Key opened	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	SCAN 65003.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:

SCAN 65003.exe

description pid process target process

PID 1856 set thread context of 1964 1856 SCAN 65003.exe SCAN 65003.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

2016 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

SCAN 65003.exeSCAN 65003.exe

pid process

1856 SCAN 65003.exe
1964 SCAN 65003.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

SCAN 65003.exeSCAN 65003.exe

description pid process

Token: SeDebugPrivilege 1856 SCAN 65003.exe
Token: SeDebugPrivilege 1964 SCAN 65003.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 1856 set thread context of 1964	1856	SCAN 65003.exe	SCAN 65003.exe

pid	process
2016	schtasks.exe

pid	process
1856	SCAN 65003.exe
1964	SCAN 65003.exe

description	pid	process
Token: SeDebugPrivilege	1856	SCAN 65003.exe
Token: SeDebugPrivilege	1964	SCAN 65003.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

SCAN 65003.exe

description	pid	process	target process
PID 1856 wrote to memory of 2016	1856	SCAN 65003.exe	schtasks.exe
PID 1856 wrote to memory of 2016	1856	SCAN 65003.exe	schtasks.exe
PID 1856 wrote to memory of 2016	1856	SCAN 65003.exe	schtasks.exe
PID 1856 wrote to memory of 2016	1856	SCAN 65003.exe	schtasks.exe
PID 1856 wrote to memory of 1964	1856	SCAN 65003.exe	SCAN 65003.exe
PID 1856 wrote to memory of 1964	1856	SCAN 65003.exe	SCAN 65003.exe
PID 1856 wrote to memory of 1964	1856	SCAN 65003.exe	SCAN 65003.exe
PID 1856 wrote to memory of 1964	1856	SCAN 65003.exe	SCAN 65003.exe
PID 1856 wrote to memory of 1964	1856	SCAN 65003.exe	SCAN 65003.exe
PID 1856 wrote to memory of 1964	1856	SCAN 65003.exe	SCAN 65003.exe
PID 1856 wrote to memory of 1964	1856	SCAN 65003.exe	SCAN 65003.exe
PID 1856 wrote to memory of 1964	1856	SCAN 65003.exe	SCAN 65003.exe
PID 1856 wrote to memory of 1964	1856	SCAN 65003.exe	SCAN 65003.exe

outlook_office_path 1 IoCs

Processes:

SCAN 65003.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe

outlook_win_path 1 IoCs

Processes:

SCAN 65003.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SCAN 65003.exe

C:\Users\Admin\AppData\Local\Temp\SCAN 65003.exe
"C:\Users\Admin\AppData\Local\Temp\SCAN 65003.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1856
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JRUsHwrwJLjc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp426E.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2016
- C:\Users\Admin\AppData\Local\Temp\SCAN 65003.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1964

Network

MITRE ATT&CK Enterprise 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

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp426E.tmp

Filesize
1KB

MD5
f262246d4ab02e3ed022f3afe47b9201

SHA1
f3154be879f200760ac24e0901e3923644b1917e

SHA256
2ecfb91b8608be5d3473a76abe1288245e917333e133f8fa21396df0c30a5b1f

SHA512
dbde35843196a737693ca31af7913015797691603c9817b060f741e40dc14cb07b0561d8f0a513340fc11f708232449d061fbd53a85dd3ee129e00f7995e443c

Download Submit
memory/1856-55-0x0000000000330000-0x0000000000340000-memory.dmp

Filesize
64KB

Download
memory/1856-56-0x00000000065D0000-0x0000000006680000-memory.dmp

Filesize
704KB

Download
memory/1856-54-0x0000000000CE0000-0x0000000000DB2000-memory.dmp

Filesize
840KB

Download
memory/1964-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1964-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1964-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1964-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1964-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1964-65-0x00000000004A308E-mapping.dmp

Download
memory/1964-67-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1964-69-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1964-70-0x0000000000680000-0x00000000006C4000-memory.dmp

Filesize
272KB

Download
memory/1964-71-0x0000000075CE1000-0x0000000075CE3000-memory.dmp

Filesize
8KB

Download
memory/1964-72-0x0000000004E05000-0x0000000004E16000-memory.dmp

Filesize
68KB

Download
memory/2016-57-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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