masslogger | 1bc2ad920f35c5a0872b0acf218cb174272650cc278cf149ab5ee8cef3b45e87

General

Target

RFQ_873821.exe
Size

836KB
MD5

6cda2a931321f1fcdc0092a95d7c2b8a
SHA1

4a1202631f6607e29f076b8d277f7101909c7a84
SHA256

2b98c280d6a4bc8ab900831de9e049ed26f9db9ede66d0804b6581c8075ea1ee
SHA512

3992f791bc8490cec3e7bfccdb9095367a54f2040e09efcdc6a6f1bbc2c33bb309b9a89b3379a5f53d74b9d81bc6f88f000268b6621ca5323b6f50afb1387e0c

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 v1.3.7.1 ################################################################# ### 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: 5/21/2022 5:02:19 AM MassLogger Started: 5/21/2022 5:02:08 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RFQ_873821.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/1044-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1044-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1044-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1044-65-0x00000000004A2D7E-mapping.dmp	family_masslogger
behavioral1/memory/1044-67-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1044-69-0x0000000000400000-0x00000000004A8000-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/2024-56-0x0000000005190000-0x000000000523E000-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:

RFQ_873821.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	RFQ_873821.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:

RFQ_873821.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	RFQ_873821.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	RFQ_873821.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	RFQ_873821.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	RFQ_873821.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	RFQ_873821.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	RFQ_873821.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:

RFQ_873821.exe

description pid process target process

PID 2024 set thread context of 1044 2024 RFQ_873821.exe RFQ_873821.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

1112 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

RFQ_873821.exe

pid process

1044 RFQ_873821.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RFQ_873821.exe

pid process

1044 RFQ_873821.exe
1044 RFQ_873821.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RFQ_873821.exe

description pid process

Token: SeDebugPrivilege 1044 RFQ_873821.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RFQ_873821.exe

pid process

1044 RFQ_873821.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 2024 set thread context of 1044	2024	RFQ_873821.exe	RFQ_873821.exe

pid	process
1112	schtasks.exe

pid	process
1044	RFQ_873821.exe

pid	process
1044	RFQ_873821.exe
1044	RFQ_873821.exe

description	pid	process
Token: SeDebugPrivilege	1044	RFQ_873821.exe

pid	process
1044	RFQ_873821.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

RFQ_873821.exe

description	pid	process	target process
PID 2024 wrote to memory of 1112	2024	RFQ_873821.exe	schtasks.exe
PID 2024 wrote to memory of 1112	2024	RFQ_873821.exe	schtasks.exe
PID 2024 wrote to memory of 1112	2024	RFQ_873821.exe	schtasks.exe
PID 2024 wrote to memory of 1112	2024	RFQ_873821.exe	schtasks.exe
PID 2024 wrote to memory of 1044	2024	RFQ_873821.exe	RFQ_873821.exe
PID 2024 wrote to memory of 1044	2024	RFQ_873821.exe	RFQ_873821.exe
PID 2024 wrote to memory of 1044	2024	RFQ_873821.exe	RFQ_873821.exe
PID 2024 wrote to memory of 1044	2024	RFQ_873821.exe	RFQ_873821.exe
PID 2024 wrote to memory of 1044	2024	RFQ_873821.exe	RFQ_873821.exe
PID 2024 wrote to memory of 1044	2024	RFQ_873821.exe	RFQ_873821.exe
PID 2024 wrote to memory of 1044	2024	RFQ_873821.exe	RFQ_873821.exe
PID 2024 wrote to memory of 1044	2024	RFQ_873821.exe	RFQ_873821.exe
PID 2024 wrote to memory of 1044	2024	RFQ_873821.exe	RFQ_873821.exe

outlook_office_path 1 IoCs

Processes:

RFQ_873821.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ_873821.exe

outlook_win_path 1 IoCs

Processes:

RFQ_873821.exe

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	RFQ_873821.exe

C:\Users\Admin\AppData\Local\Temp\RFQ_873821.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ_873821.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2024

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fRaDghVtXh" /XML "C:\Users\Admin\AppData\Local\Temp\tmp32D4.tmp"
2⤵
- Creates scheduled task(s)
PID:1112

C:\Users\Admin\AppData\Local\Temp\RFQ_873821.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:1044

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp32D4.tmp
Filesize
1KB

MD5
4542ce5bb004d5b4b1e293369cc5e5c6

SHA1
adc48a757180f90b8f446cda1d5a58c27bbe91f4

SHA256
8d2c2780db08c67f2523f54c1a1a729d703330b6c7e5c79e6316e2646a214246

SHA512
3946b2b2592491e741a66cbd178f87d736b9bc4c9c1e13a9f100fbf67c8503562eb7be1b46947e29aaecdf2041e7353bd352e82d6d350a11f6365fc1db5cbcd3

Download Submit
memory/1044-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1044-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1044-72-0x0000000004F45000-0x0000000004F56000-memory.dmp

Filesize
68KB

Download
memory/1044-71-0x0000000076011000-0x0000000076013000-memory.dmp

Filesize
8KB

Download
memory/1044-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1044-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1044-70-0x00000000003C0000-0x0000000000404000-memory.dmp

Filesize
272KB

Download
memory/1044-69-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1044-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1044-65-0x00000000004A2D7E-mapping.dmp

Download
memory/1044-67-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1112-57-0x0000000000000000-mapping.dmp

Download
memory/2024-54-0x0000000000D10000-0x0000000000DE8000-memory.dmp

Filesize
864KB

Download
memory/2024-56-0x0000000005190000-0x000000000523E000-memory.dmp

Filesize
696KB

Download
memory/2024-55-0x0000000000240000-0x0000000000250000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads