masslogger | 3d6c42cafbbcb96f6bd42158290f51c6bc6b9ea7470fe27a9326f998acea91ea

General

Target

Attached Products Inquiry.doc.z.exe
Size

883KB
MD5

f2209b14ae0829869f16b7dc0c78c813
SHA1

987e30e37d99b08d9d22e199108893cf01ee24a9
SHA256

8fd65d51cacf70ad39a95d0c7e89af58c406bce0a61f1365ba7889475e0e1218
SHA512

8bbf5abcdf24e3aefc20416bc5b7afe89549aa42c5b28e05fb7a009bbed0a3651d7240d84fc7b44fad9b6fc8857d93f36f5b0f2d93f923918a85e5a90b5f17c9

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 4:41:59 AM MassLogger Started: 5/21/2022 4:41:48 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Attached Products Inquiry.doc.z.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:
publictalkdycaress2

Signatures

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

MassLogger Main Payload 33 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1268-62-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-63-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-64-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-65-0x00000000004AB65E-mapping.dmp	family_masslogger
behavioral1/memory/1268-67-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-69-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-71-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-73-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-75-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-77-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-79-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-81-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-83-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-85-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-87-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-89-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-91-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-93-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-95-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-97-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-99-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-101-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-103-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-105-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-107-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-109-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-111-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-113-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-115-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-117-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-119-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-121-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/1268-123-0x0000000000400000-0x00000000004B0000-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/536-56-0x00000000051B0000-0x0000000005268000-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:

Attached Products Inquiry.doc.z.exe

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

Attached Products Inquiry.doc.z.exe

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

Attached Products Inquiry.doc.z.exe

description pid process target process

PID 536 set thread context of 1268 536 Attached Products Inquiry.doc.z.exe Attached Products Inquiry.doc.z.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

1292 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

Attached Products Inquiry.doc.z.exe

pid process

1268 Attached Products Inquiry.doc.z.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Attached Products Inquiry.doc.z.exe

description pid process

Token: SeDebugPrivilege 1268 Attached Products Inquiry.doc.z.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 536 set thread context of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe

pid	process
1292	schtasks.exe

pid	process
1268	Attached Products Inquiry.doc.z.exe

description	pid	process
Token: SeDebugPrivilege	1268	Attached Products Inquiry.doc.z.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Attached Products Inquiry.doc.z.exe

description	pid	process	target process
PID 536 wrote to memory of 1292	536	Attached Products Inquiry.doc.z.exe	schtasks.exe
PID 536 wrote to memory of 1292	536	Attached Products Inquiry.doc.z.exe	schtasks.exe
PID 536 wrote to memory of 1292	536	Attached Products Inquiry.doc.z.exe	schtasks.exe
PID 536 wrote to memory of 1292	536	Attached Products Inquiry.doc.z.exe	schtasks.exe
PID 536 wrote to memory of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 536 wrote to memory of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 536 wrote to memory of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 536 wrote to memory of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 536 wrote to memory of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 536 wrote to memory of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 536 wrote to memory of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 536 wrote to memory of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe
PID 536 wrote to memory of 1268	536	Attached Products Inquiry.doc.z.exe	Attached Products Inquiry.doc.z.exe

outlook_office_path 1 IoCs

Processes:

Attached Products Inquiry.doc.z.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	Attached Products Inquiry.doc.z.exe

outlook_win_path 1 IoCs

Processes:

Attached Products Inquiry.doc.z.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	Attached Products Inquiry.doc.z.exe

C:\Users\Admin\AppData\Local\Temp\Attached Products Inquiry.doc.z.exe
"C:\Users\Admin\AppData\Local\Temp\Attached Products Inquiry.doc.z.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:536

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mqXpsxyxVHpNX" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEBD6.tmp"
2⤵
- Creates scheduled task(s)
PID:1292

C:\Users\Admin\AppData\Local\Temp\Attached Products Inquiry.doc.z.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:1268

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\tmpEBD6.tmp
Filesize
1KB

MD5
b53086b42d3d1d6a5ee22bf08db62567

SHA1
e44e382fe08b88a631eb2be48c99ffd1cb24d4e0

SHA256
e5c4192b26038f346e7616a38c1d85a94b58b03a0a8310b5211717918764fa9b

SHA512
9e99008478e9c842e59c47ca7b24c8541f386853472207c3dd2f4b646b50de2276d22ceabd813c57691cedff591ec695703ec4d81c9aadd1ca9e2a34946a0a80

Download Submit
memory/536-55-0x00000000002C0000-0x00000000002D6000-memory.dmp

Filesize
88KB

Download
memory/536-56-0x00000000051B0000-0x0000000005268000-memory.dmp

Filesize
736KB

Download
memory/536-54-0x0000000001090000-0x0000000001174000-memory.dmp

Filesize
912KB

Download
memory/1268-85-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-119-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-60-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-62-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-63-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-64-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-65-0x00000000004AB65E-mapping.dmp

Download
memory/1268-67-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-69-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-71-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-73-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-75-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-77-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-93-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-81-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-83-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-583-0x0000000000B30000-0x0000000000B44000-memory.dmp

Filesize
80KB

Download
memory/1268-87-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-582-0x0000000004C85000-0x0000000004C96000-memory.dmp

Filesize
68KB

Download
memory/1268-59-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-79-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-95-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-97-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-99-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-101-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-103-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-105-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-107-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-109-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-111-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-113-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-115-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-117-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-91-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-121-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-123-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1268-580-0x00000000009F0000-0x0000000000A34000-memory.dmp

Filesize
272KB

Download
memory/1268-89-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1292-57-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads