masslogger | b73eb50389b6053796e922d764b9fd8b94d90d21c8c885ae265e6092ed971dd8

General

Target

RFQ.exe
Size

899KB
MD5

87e11aa7db38adec3ae9bdf63bc503a4
SHA1

7adb67850e4e30293a685e0680930f7fa3d260ab
SHA256

b8892e7eafba52a3b311d7741d89363ec9d52b8d1fd180ea32385be609a6b9e8
SHA512

5bddae5ab76df3057cd6f2fa9adab6f12d254e74d21d253b59e84675029fa8b408a364b3ca55a2f4b7a08ec3b29ed0b98730ab425a63c5baa4f8f08b48e87fd7

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 v1.3.5.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 Location: United States OS: Microsoft Windows 7 Ultimate 64bit CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 1:07:20 PM MassLogger Started: 5/21/2022 1:07:09 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RFQ.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Extracted

Credentials

Protocol: smtp
Host:
mail.ucfblr.com
Port:
587
Username:
narasimha.murthy@ucfblr.com
Password:
Nam@123s#

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware 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/2004-57-0x0000000007F60000-0x0000000008018000-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.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation RFQ.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

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

Accesses Microsoft Outlook profiles 1 TTPs 15 IoCs

collection

Email Collection

T1114

Processes:

RFQ.exe

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

description pid process target process

PID 2004 set thread context of 988 2004 RFQ.exe RFQ.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

1544 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

RFQ.exe

pid process

988 RFQ.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

RFQ.exeRFQ.exe

pid process

2004 RFQ.exe
2004 RFQ.exe
988 RFQ.exe
988 RFQ.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

RFQ.exeRFQ.exe

description pid process

Token: SeDebugPrivilege 2004 RFQ.exe
Token: SeDebugPrivilege 988 RFQ.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RFQ.exe

pid process

988 RFQ.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 2004 set thread context of 988	2004	RFQ.exe	RFQ.exe

pid	process
1544	schtasks.exe

pid	process
988	RFQ.exe

pid	process
2004	RFQ.exe
2004	RFQ.exe
988	RFQ.exe
988	RFQ.exe

description	pid	process
Token: SeDebugPrivilege	2004	RFQ.exe
Token: SeDebugPrivilege	988	RFQ.exe

pid	process
988	RFQ.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

RFQ.exe

description	pid	process	target process
PID 2004 wrote to memory of 1544	2004	RFQ.exe	schtasks.exe
PID 2004 wrote to memory of 1544	2004	RFQ.exe	schtasks.exe
PID 2004 wrote to memory of 1544	2004	RFQ.exe	schtasks.exe
PID 2004 wrote to memory of 1544	2004	RFQ.exe	schtasks.exe
PID 2004 wrote to memory of 1892	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 1892	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 1892	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 1892	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 988	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 988	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 988	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 988	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 988	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 988	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 988	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 988	2004	RFQ.exe	RFQ.exe
PID 2004 wrote to memory of 988	2004	RFQ.exe	RFQ.exe

outlook_office_path 1 IoCs

Processes:

RFQ.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.exe

outlook_win_path 1 IoCs

Processes:

RFQ.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.exe

C:\Users\Admin\AppData\Local\Temp\RFQ.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2004

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\snxnYBX" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2CF.tmp"
2⤵
- Creates scheduled task(s)
PID:1544

C:\Users\Admin\AppData\Local\Temp\RFQ.exe
"{path}"
2⤵
PID:1892

C:\Users\Admin\AppData\Local\Temp\RFQ.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:988

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2CF.tmp
Filesize
1KB

MD5
db5db3afc9497d5eca52257114e5101a

SHA1
2320eaf628d75a7f5f5d21b1e58dfee95b3a713a

SHA256
5adedda8ab14f1e65719f8ec4cfb1c7fea1e776b6bae47cc1bf5888d6c1e126d

SHA512
0e68f280662198b2c8072b8e8d7952f3f6d7288b06a2cad39069e147845e9c602b2dc800c88f652100f55fb73cc381b0a93e036cc0c4341ad389338432ef44ee

Download Submit
memory/988-84-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-63-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-90-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-582-0x0000000000E00000-0x0000000000E14000-memory.dmp

Filesize
80KB

Download
memory/988-581-0x0000000004F55000-0x0000000004F66000-memory.dmp

Filesize
68KB

Download
memory/988-60-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-61-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-88-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-64-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-65-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-66-0x00000000004AB89E-mapping.dmp

Download
memory/988-68-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-86-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-72-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-74-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-76-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-78-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-80-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-82-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-579-0x0000000000520000-0x0000000000564000-memory.dmp

Filesize
272KB

Download
memory/988-70-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-122-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-120-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-92-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-94-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-96-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-98-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-100-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-102-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-104-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-106-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-108-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-110-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-112-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-114-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-116-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/988-118-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1544-58-0x0000000000000000-mapping.dmp

Download
memory/2004-57-0x0000000007F60000-0x0000000008018000-memory.dmp

Filesize
736KB

Download
memory/2004-56-0x0000000000520000-0x0000000000530000-memory.dmp

Filesize
64KB

Download
memory/2004-54-0x00000000012D0000-0x00000000013B6000-memory.dmp

Filesize
920KB

Download
memory/2004-55-0x0000000075521000-0x0000000075523000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads