masslogger | da04944b0e2ece59d505156e44fc175fee32184f7fcc2d5bf83c59a5f5f98559

General

Target

PO#Ref49038.scr
Size

927KB
MD5

cf00e03f0d25b9148e53cd7c9d07cdde
SHA1

16b781a2c67873bce30780a39d90021e40f2aa5b
SHA256

bc9ef35a37d74aeb04bb1140314db0fca3f09fe2657e987cd8aaa9e4f234b991
SHA512

5281b96474520fce34934414eb8ec5ca07758579e27250e2aa86f0ddc02bb3b75547fd596d5b947396a663fdcca04e93736ff9d7d3958fe89a4d27c068c8f0d4

Score

10^/10

masslogger collection ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\AEF946DCB4\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.7.0 ################################################################# ### 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 2:54:10 PM MassLogger Started: 5/21/2022 2:53:43 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\PO#Ref49038.scr 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/668-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/668-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/668-65-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/668-66-0x00000000004A2CEE-mapping.dmp	family_masslogger
behavioral1/memory/668-68-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/668-70-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger

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

Processes:

yara_rule

masslogger_log_file

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/1160-57-0x0000000005EC0000-0x0000000005F6E000-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:

PO#Ref49038.scr

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation	PO#Ref49038.scr

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:

PO#Ref49038.scr

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	PO#Ref49038.scr
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	PO#Ref49038.scr
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	PO#Ref49038.scr
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	PO#Ref49038.scr
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	PO#Ref49038.scr
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	PO#Ref49038.scr
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr

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:

PO#Ref49038.scr

description pid process target process

PID 1160 set thread context of 668 1160 PO#Ref49038.scr PO#Ref49038.scr
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

2032 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

PO#Ref49038.scr

pid process

668 PO#Ref49038.scr
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

PO#Ref49038.scrPO#Ref49038.scr

pid process

1160 PO#Ref49038.scr
1160 PO#Ref49038.scr
1160 PO#Ref49038.scr
668 PO#Ref49038.scr
668 PO#Ref49038.scr
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PO#Ref49038.scrPO#Ref49038.scr

description pid process

Token: SeDebugPrivilege 1160 PO#Ref49038.scr
Token: SeDebugPrivilege 668 PO#Ref49038.scr
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

PO#Ref49038.scr

pid process

668 PO#Ref49038.scr

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 1160 set thread context of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr

pid	process
2032	schtasks.exe

pid	process
668	PO#Ref49038.scr

pid	process
1160	PO#Ref49038.scr
1160	PO#Ref49038.scr
1160	PO#Ref49038.scr
668	PO#Ref49038.scr
668	PO#Ref49038.scr

description	pid	process
Token: SeDebugPrivilege	1160	PO#Ref49038.scr
Token: SeDebugPrivilege	668	PO#Ref49038.scr

pid	process
668	PO#Ref49038.scr

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

PO#Ref49038.scr

description	pid	process	target process
PID 1160 wrote to memory of 2032	1160	PO#Ref49038.scr	schtasks.exe
PID 1160 wrote to memory of 2032	1160	PO#Ref49038.scr	schtasks.exe
PID 1160 wrote to memory of 2032	1160	PO#Ref49038.scr	schtasks.exe
PID 1160 wrote to memory of 2032	1160	PO#Ref49038.scr	schtasks.exe
PID 1160 wrote to memory of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr
PID 1160 wrote to memory of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr
PID 1160 wrote to memory of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr
PID 1160 wrote to memory of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr
PID 1160 wrote to memory of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr
PID 1160 wrote to memory of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr
PID 1160 wrote to memory of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr
PID 1160 wrote to memory of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr
PID 1160 wrote to memory of 668	1160	PO#Ref49038.scr	PO#Ref49038.scr

outlook_office_path 1 IoCs

Processes:

PO#Ref49038.scr

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	PO#Ref49038.scr

outlook_win_path 1 IoCs

Processes:

PO#Ref49038.scr

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	PO#Ref49038.scr

C:\Users\Admin\AppData\Local\Temp\PO#Ref49038.scr
"C:\Users\Admin\AppData\Local\Temp\PO#Ref49038.scr" /S
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1160

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XsfZPhAnS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2DC5.tmp"
2⤵
- Creates scheduled task(s)
PID:2032

C:\Users\Admin\AppData\Local\Temp\PO#Ref49038.scr
"{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:668

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\tmp2DC5.tmp
Filesize
1KB

MD5
f96eccd21f26e912c9ae201a3ca3ce9e

SHA1
2f78fe243a0ff9a77349c83a52b04f2e89067dbc

SHA256
e4a66d92adeedb08bfd8fe7b1c1892ed9e1ff939d3ee9aebb45a9388bd15801a

SHA512
477a663de08a5cce636882430724e7da9e80c9749ce8c157059657ffe3150c11e75fdc08ef9b7d16b76803e64937c09c5f6dde98cfd547b77bc393fce4d67c0b

Download Submit
memory/668-68-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/668-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/668-73-0x0000000004BD5000-0x0000000004BE6000-memory.dmp

Filesize
68KB

Download
memory/668-72-0x0000000075581000-0x0000000075583000-memory.dmp

Filesize
8KB

Download
memory/668-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/668-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/668-71-0x00000000007B0000-0x00000000007F4000-memory.dmp

Filesize
272KB

Download
memory/668-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/668-70-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/668-65-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/668-66-0x00000000004A2CEE-mapping.dmp

Download
memory/1160-54-0x0000000000AA0000-0x0000000000B92000-memory.dmp

Filesize
968KB

Download
memory/1160-55-0x0000000005C20000-0x0000000005CE8000-memory.dmp

Filesize
800KB

Download
memory/1160-56-0x00000000003F0000-0x0000000000404000-memory.dmp

Filesize
80KB

Download
memory/1160-57-0x0000000005EC0000-0x0000000005F6E000-memory.dmp

Filesize
696KB

Download
memory/2032-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads