masslogger | 8847ac1680030bbf54afbda6f552c4bdef8b66a510c0de95d845364270edf46a

General

Target

4-5114-HT.exe
Size

818KB
MD5

c8afbe0ba63c3dcde9c7c05b2e344951
SHA1

398ab5dd98b0720d4dd858a6da836e022a9d7849
SHA256

81ae80d0dc7e949cd78a6b555c1b08ebd8ec89ecf9847f3d1c0d9790b11be355
SHA512

6e5ca7f4c06a09d5e784a5d153236c93a663b6046366d1e81b32eab75c1ed886116a8548a6e11f1e5c09b517f89f93312e9cb0ff1d6688c60d9b6b1c5d1fd9cc

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 1:09:06 PM MassLogger Started: 5/21/2022 1:08:55 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\4-5114-HT.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/1620-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1620-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1620-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1620-65-0x00000000004A31FE-mapping.dmp	family_masslogger
behavioral1/memory/1620-67-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1620-69-0x0000000000400000-0x00000000004A8000-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/1828-56-0x0000000005510000-0x00000000055C0000-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:

4-5114-HT.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	4-5114-HT.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:

4-5114-HT.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4-5114-HT.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4-5114-HT.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4-5114-HT.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4-5114-HT.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	4-5114-HT.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4-5114-HT.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4-5114-HT.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4-5114-HT.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4-5114-HT.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4-5114-HT.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	4-5114-HT.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	4-5114-HT.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	4-5114-HT.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	4-5114-HT.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	4-5114-HT.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:

4-5114-HT.exe

description pid process target process

PID 1828 set thread context of 1620 1828 4-5114-HT.exe 4-5114-HT.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

844 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

4-5114-HT.exe

pid process

1620 4-5114-HT.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

4-5114-HT.exe

pid process

1620 4-5114-HT.exe
1620 4-5114-HT.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

4-5114-HT.exe

description pid process

Token: SeDebugPrivilege 1620 4-5114-HT.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

4-5114-HT.exe

pid process

1620 4-5114-HT.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 1828 set thread context of 1620	1828	4-5114-HT.exe	4-5114-HT.exe

pid	process
844	schtasks.exe

pid	process
1620	4-5114-HT.exe

pid	process
1620	4-5114-HT.exe
1620	4-5114-HT.exe

description	pid	process
Token: SeDebugPrivilege	1620	4-5114-HT.exe

pid	process
1620	4-5114-HT.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

4-5114-HT.exe

description	pid	process	target process
PID 1828 wrote to memory of 844	1828	4-5114-HT.exe	schtasks.exe
PID 1828 wrote to memory of 844	1828	4-5114-HT.exe	schtasks.exe
PID 1828 wrote to memory of 844	1828	4-5114-HT.exe	schtasks.exe
PID 1828 wrote to memory of 844	1828	4-5114-HT.exe	schtasks.exe
PID 1828 wrote to memory of 1620	1828	4-5114-HT.exe	4-5114-HT.exe
PID 1828 wrote to memory of 1620	1828	4-5114-HT.exe	4-5114-HT.exe
PID 1828 wrote to memory of 1620	1828	4-5114-HT.exe	4-5114-HT.exe
PID 1828 wrote to memory of 1620	1828	4-5114-HT.exe	4-5114-HT.exe
PID 1828 wrote to memory of 1620	1828	4-5114-HT.exe	4-5114-HT.exe
PID 1828 wrote to memory of 1620	1828	4-5114-HT.exe	4-5114-HT.exe
PID 1828 wrote to memory of 1620	1828	4-5114-HT.exe	4-5114-HT.exe
PID 1828 wrote to memory of 1620	1828	4-5114-HT.exe	4-5114-HT.exe
PID 1828 wrote to memory of 1620	1828	4-5114-HT.exe	4-5114-HT.exe

outlook_office_path 1 IoCs

Processes:

4-5114-HT.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	4-5114-HT.exe

outlook_win_path 1 IoCs

Processes:

4-5114-HT.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	4-5114-HT.exe

C:\Users\Admin\AppData\Local\Temp\4-5114-HT.exe
"C:\Users\Admin\AppData\Local\Temp\4-5114-HT.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1828

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gHcqgvrO" /XML "C:\Users\Admin\AppData\Local\Temp\tmp541A.tmp"
2⤵
- Creates scheduled task(s)
PID:844

C:\Users\Admin\AppData\Local\Temp\4-5114-HT.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:1620

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\tmp541A.tmp
Filesize
1KB

MD5
4067a7289ef8cbd269bd827d9001a5f1

SHA1
f725e1b66cd4a17031d53059ad21efe06da0547d

SHA256
c217d043148608c9612dfe1e2232e91f2a713bedb4ff9f34b0d2c76c34615352

SHA512
47958e772a3a24e38a709ac4ad74e1582ea829531d76d329af5efc1596435ac2349ed0d293224491fb60e53d66f57bda51b74187921f1fce15f555334c136648

Download Submit
memory/844-57-0x0000000000000000-mapping.dmp

Download
memory/1620-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1620-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1620-72-0x0000000000A55000-0x0000000000A66000-memory.dmp

Filesize
68KB

Download
memory/1620-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1620-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1620-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1620-71-0x0000000075741000-0x0000000075743000-memory.dmp

Filesize
8KB

Download
memory/1620-70-0x00000000004B0000-0x00000000004F4000-memory.dmp

Filesize
272KB

Download
memory/1620-65-0x00000000004A31FE-mapping.dmp

Download
memory/1620-67-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1620-69-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1828-56-0x0000000005510000-0x00000000055C0000-memory.dmp

Filesize
704KB

Download
memory/1828-54-0x0000000001250000-0x0000000001322000-memory.dmp

Filesize
840KB

Download
memory/1828-55-0x0000000000310000-0x0000000000320000-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