masslogger | 5a7b4a2c621603832c1e73ad6d7ad022c260daaca1ea193a5e0ecca3bc5609d3

General

Target

BL_0003.exe
Size

813KB
MD5

e62ddd8facfe9707b2f56fd60bb09266
SHA1

7c3e04a6eb2252a38b50b237ba201114bdfaf346
SHA256

eb3d6a6bfec90855240b6e239a10d283ecf13b118e9b769e2f4100b3eec76a12
SHA512

50022648bc29f6cdcb20a6e640848908d35785e463056efbfc06e2666b1015589e156b4a82dd25c33252d566d638f2ab0f0e059ce36f58e2f84e02d0b382224e

Score

10^/10

masslogger collection ransomware 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 2:40:42 AM MassLogger Started: 5/21/2022 2:40:34 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\BL_0003.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/2032-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2032-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2032-65-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2032-66-0x00000000004A2E6E-mapping.dmp	family_masslogger
behavioral1/memory/2032-68-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2032-70-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.

Processes:

yara_rule

masslogger_log_file
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:

BL_0003.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation BL_0003.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

yara_rule
masslogger_log_file

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation	BL_0003.exe

Accesses Microsoft Outlook profiles 1 TTPs 15 IoCs

collection

Email Collection

T1114

Processes:

BL_0003.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	BL_0003.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BL_0003.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BL_0003.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BL_0003.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BL_0003.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BL_0003.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BL_0003.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	BL_0003.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BL_0003.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BL_0003.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BL_0003.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	BL_0003.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	BL_0003.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	BL_0003.exe
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	BL_0003.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:

BL_0003.exe

description pid process target process

PID 1684 set thread context of 2032 1684 BL_0003.exe BL_0003.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

1704 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

BL_0003.exe

pid process

2032 BL_0003.exe
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

BL_0003.exeBL_0003.exe

pid process

1684 BL_0003.exe
1684 BL_0003.exe
1684 BL_0003.exe
1684 BL_0003.exe
1684 BL_0003.exe
2032 BL_0003.exe
2032 BL_0003.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

BL_0003.exeBL_0003.exe

description pid process

Token: SeDebugPrivilege 1684 BL_0003.exe
Token: SeDebugPrivilege 2032 BL_0003.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

BL_0003.exe

pid process

2032 BL_0003.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 1684 set thread context of 2032	1684	BL_0003.exe	BL_0003.exe

pid	process
1704	schtasks.exe

pid	process
2032	BL_0003.exe

pid	process
1684	BL_0003.exe
1684	BL_0003.exe
1684	BL_0003.exe
1684	BL_0003.exe
1684	BL_0003.exe
2032	BL_0003.exe
2032	BL_0003.exe

description	pid	process
Token: SeDebugPrivilege	1684	BL_0003.exe
Token: SeDebugPrivilege	2032	BL_0003.exe

pid	process
2032	BL_0003.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

BL_0003.exe

description	pid	process	target process
PID 1684 wrote to memory of 1704	1684	BL_0003.exe	schtasks.exe
PID 1684 wrote to memory of 1704	1684	BL_0003.exe	schtasks.exe
PID 1684 wrote to memory of 1704	1684	BL_0003.exe	schtasks.exe
PID 1684 wrote to memory of 1704	1684	BL_0003.exe	schtasks.exe
PID 1684 wrote to memory of 2032	1684	BL_0003.exe	BL_0003.exe
PID 1684 wrote to memory of 2032	1684	BL_0003.exe	BL_0003.exe
PID 1684 wrote to memory of 2032	1684	BL_0003.exe	BL_0003.exe
PID 1684 wrote to memory of 2032	1684	BL_0003.exe	BL_0003.exe
PID 1684 wrote to memory of 2032	1684	BL_0003.exe	BL_0003.exe
PID 1684 wrote to memory of 2032	1684	BL_0003.exe	BL_0003.exe
PID 1684 wrote to memory of 2032	1684	BL_0003.exe	BL_0003.exe
PID 1684 wrote to memory of 2032	1684	BL_0003.exe	BL_0003.exe
PID 1684 wrote to memory of 2032	1684	BL_0003.exe	BL_0003.exe

outlook_office_path 1 IoCs

Processes:

BL_0003.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	BL_0003.exe

outlook_win_path 1 IoCs

Processes:

BL_0003.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	BL_0003.exe

C:\Users\Admin\AppData\Local\Temp\BL_0003.exe
"C:\Users\Admin\AppData\Local\Temp\BL_0003.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1684

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fauItV" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC543.tmp"
2⤵
- Creates scheduled task(s)
PID:1704

C:\Users\Admin\AppData\Local\Temp\BL_0003.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:2032

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\tmpC543.tmp
Filesize
1KB

MD5
fdea3db406d6e18b9ba2341324153265

SHA1
8909b6fbee46bd9730c944f39c2f40397da9dd28

SHA256
54cd0353a3d90cd87ed84bc319d750e65b834c585c3633aea4e47920f7f9a8f6

SHA512
aa635acf6162be0abc23f737180378455fee237a2d83675c81c6582e4bb0789862f5c254f93c463cbfeee9e6aa2922afcdc3ce3a7282f0f628d581958a9225c4

Download Submit
memory/1684-54-0x0000000000F60000-0x0000000001032000-memory.dmp

Filesize
840KB

Download
memory/1684-55-0x00000000004B0000-0x00000000004BA000-memory.dmp

Filesize
40KB

Download
memory/1684-56-0x0000000005830000-0x00000000058E6000-memory.dmp

Filesize
728KB

Download
memory/1684-57-0x0000000008280000-0x0000000008328000-memory.dmp

Filesize
672KB

Download
memory/1704-58-0x0000000000000000-mapping.dmp

Download
memory/2032-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2032-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2032-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2032-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2032-65-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2032-66-0x00000000004A2E6E-mapping.dmp

Download
memory/2032-68-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2032-70-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2032-71-0x00000000009B0000-0x00000000009F4000-memory.dmp

Filesize
272KB

Download
memory/2032-72-0x0000000076431000-0x0000000076433000-memory.dmp

Filesize
8KB

Download
memory/2032-73-0x0000000004C65000-0x0000000004C76000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads