masslogger | 10a4ba420a16ca28bd4a7b50d7f947d4705bba87031009a45e8ace94e7dee855

Analysis

max time kernel
122s
max time network
141s
platform
windows7_x64
resource
win7-20220414-en
submitted
21/05/2022, 03:28

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General

Target

RK__PO_N.exe
Size

981KB
MD5

96de546b32289587f7db830e1e385a26
SHA1

60f2925dc7ebdb8aa4c844edcaa3b0b5c6b4954b
SHA256

00068dc51db13086db2a9fc776a55a946c699f1a225ee6595ae6b91ea469356c
SHA512

f26fe0d399a4b428a80a828c29e63145c7eb406200829fa473ae40e77c055f45071d4cacb02c8a59c87969ecb0dc3f7a7e97387bc0ecf34d080ede36b18951fd

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 v1.3.6.0 ################################################################# ### 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 7:10:07 AM MassLogger Started: 5/21/2022 7:10:00 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RK__PO_N.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Extracted

Credentials

Protocol: smtp
Host:
smtp.yandex.ru
Port:
587
Username:
[email protected]
Password:
cruizjamesvhjkl@

Signatures

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

MassLogger Main Payload 33 IoCs

resource	yara_rule
behavioral3/memory/1980-63-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-64-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-66-0x00000000004AC9AE-mapping.dmp	family_masslogger
behavioral3/memory/1980-65-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-68-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-70-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-72-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-74-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-76-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-78-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-80-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-82-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-84-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-86-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-88-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-90-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-92-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-96-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-94-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-98-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-100-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-102-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-104-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-106-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-108-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-110-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-114-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-112-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-116-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-118-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-120-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-122-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral3/memory/1980-124-0x0000000000400000-0x00000000004B2000-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
behavioral3/memory/1348-57-0x0000000005D40000-0x0000000005DF8000-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-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation	RK__PO_N.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-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	RK__PO_N.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	RK__PO_N.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	RK__PO_N.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	RK__PO_N.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	RK__PO_N.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	RK__PO_N.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 1348 set thread context of 1980	1348	RK__PO_N.exe	30

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

pid	Process
1632	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1348	RK__PO_N.exe
1348	RK__PO_N.exe
1980	RK__PO_N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1348	RK__PO_N.exe
Token: SeDebugPrivilege	1980	RK__PO_N.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1348 wrote to memory of 1632	1348	RK__PO_N.exe	28
PID 1348 wrote to memory of 1632	1348	RK__PO_N.exe	28
PID 1348 wrote to memory of 1632	1348	RK__PO_N.exe	28
PID 1348 wrote to memory of 1632	1348	RK__PO_N.exe	28
PID 1348 wrote to memory of 1980	1348	RK__PO_N.exe	30
PID 1348 wrote to memory of 1980	1348	RK__PO_N.exe	30
PID 1348 wrote to memory of 1980	1348	RK__PO_N.exe	30
PID 1348 wrote to memory of 1980	1348	RK__PO_N.exe	30
PID 1348 wrote to memory of 1980	1348	RK__PO_N.exe	30
PID 1348 wrote to memory of 1980	1348	RK__PO_N.exe	30
PID 1348 wrote to memory of 1980	1348	RK__PO_N.exe	30
PID 1348 wrote to memory of 1980	1348	RK__PO_N.exe	30
PID 1348 wrote to memory of 1980	1348	RK__PO_N.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RK__PO_N.exe

outlook_win_path 1 IoCs

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	RK__PO_N.exe

C:\Users\Admin\AppData\Local\Temp\RK__PO_N.exe
"C:\Users\Admin\AppData\Local\Temp\RK__PO_N.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1348
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\hffwylP" /XML "C:\Users\Admin\AppData\Local\Temp\tmp587D.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1632
- C:\Users\Admin\AppData\Local\Temp\RK__PO_N.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:1980

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp587D.tmp

Filesize
1KB

MD5
65197dfa78bbca84590ea14307adef72

SHA1
31237357c5154fe6384c3f21bdf88444213455b5

SHA256
6a9393a1c262013842cac1bfbd6738e8bac5ec47e5637361488ff3709a00fb77

SHA512
3c89e59b4e326ee0aac7913f749109190cf28027399b1c57d7a732b9e905d943f0a5666b40881ed58f10a89362d25f9dd0ab14c5fd226819b64199777b8b2f2e

Download Submit
memory/1348-54-0x0000000001010000-0x000000000110E000-memory.dmp

Filesize
1016KB

Download
memory/1348-55-0x0000000007F90000-0x000000000806C000-memory.dmp

Filesize
880KB

Download
memory/1348-56-0x0000000000450000-0x0000000000464000-memory.dmp

Filesize
80KB

Download
memory/1348-57-0x0000000005D40000-0x0000000005DF8000-memory.dmp

Filesize
736KB

Download
memory/1980-88-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-96-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-63-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-64-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-65-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-68-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-70-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-72-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-74-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-76-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-78-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-80-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-82-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-84-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-86-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-60-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-90-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-92-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-61-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-94-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-98-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-100-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-102-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-104-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-106-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-108-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-110-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-114-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-112-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-116-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-118-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-120-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-122-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-124-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1980-587-0x0000000000C60000-0x0000000000CA4000-memory.dmp

Filesize
272KB

Download
memory/1980-589-0x0000000000CD5000-0x0000000000CE6000-memory.dmp

Filesize
68KB

Download
memory/1980-590-0x0000000000D10000-0x0000000000D24000-memory.dmp

Filesize
80KB

Download