masslogger | ea1d486ee6b3c2dd96db4f2bc1236f4c40d2b7d3a8a060f3348fab00c98832db

General

Target

Purchase Order_pdf.exe
Size

863KB
MD5

46f6a9c3798b0a265c883914b575f582
SHA1

ee1ef2e31b27385fe7c419051764c3b7c1872c78
SHA256

7c8962ad0cf0487df0793c34b8bba9b9fbb83e88287afa9761083e3d7b4eda36
SHA512

50a645aaeb3cb5582f12a2f917d939602dc20e3a2020af19b13d1253325f8df45072fd9b184c64870b1a42a8ecbcc8ee6b09ed01b489912e5635d899ad1ee21a

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 11:42:55 AM MassLogger Started: 5/21/2022 11:42:44 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Purchase Order_pdf.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/288-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/288-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/288-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/288-65-0x00000000004A309E-mapping.dmp	family_masslogger
behavioral1/memory/288-67-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/288-69-0x0000000000400000-0x00000000004A8000-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/1828-56-0x0000000005230000-0x00000000052E0000-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:

Purchase Order_pdf.exe

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

Purchase Order_pdf.exe

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

Purchase Order_pdf.exe

description pid process target process

PID 1828 set thread context of 288 1828 Purchase Order_pdf.exe Purchase Order_pdf.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:

Purchase Order_pdf.exe

pid process

288 Purchase Order_pdf.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Purchase Order_pdf.exePurchase Order_pdf.exe

pid process

1828 Purchase Order_pdf.exe
288 Purchase Order_pdf.exe
288 Purchase Order_pdf.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Purchase Order_pdf.exePurchase Order_pdf.exe

description pid process

Token: SeDebugPrivilege 1828 Purchase Order_pdf.exe
Token: SeDebugPrivilege 288 Purchase Order_pdf.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Purchase Order_pdf.exe

pid process

288 Purchase Order_pdf.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 1828 set thread context of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe

pid	process
844	schtasks.exe

pid	process
288	Purchase Order_pdf.exe

pid	process
1828	Purchase Order_pdf.exe
288	Purchase Order_pdf.exe
288	Purchase Order_pdf.exe

description	pid	process
Token: SeDebugPrivilege	1828	Purchase Order_pdf.exe
Token: SeDebugPrivilege	288	Purchase Order_pdf.exe

pid	process
288	Purchase Order_pdf.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Purchase Order_pdf.exe

description	pid	process	target process
PID 1828 wrote to memory of 844	1828	Purchase Order_pdf.exe	schtasks.exe
PID 1828 wrote to memory of 844	1828	Purchase Order_pdf.exe	schtasks.exe
PID 1828 wrote to memory of 844	1828	Purchase Order_pdf.exe	schtasks.exe
PID 1828 wrote to memory of 844	1828	Purchase Order_pdf.exe	schtasks.exe
PID 1828 wrote to memory of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe
PID 1828 wrote to memory of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe
PID 1828 wrote to memory of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe
PID 1828 wrote to memory of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe
PID 1828 wrote to memory of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe
PID 1828 wrote to memory of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe
PID 1828 wrote to memory of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe
PID 1828 wrote to memory of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe
PID 1828 wrote to memory of 288	1828	Purchase Order_pdf.exe	Purchase Order_pdf.exe

outlook_office_path 1 IoCs

Processes:

Purchase Order_pdf.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	Purchase Order_pdf.exe

outlook_win_path 1 IoCs

Processes:

Purchase Order_pdf.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	Purchase Order_pdf.exe

C:\Users\Admin\AppData\Local\Temp\Purchase Order_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1828

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\LCdHbEA" /XML "C:\Users\Admin\AppData\Local\Temp\tmp58EA.tmp"
2⤵
- Creates scheduled task(s)
PID:844

C:\Users\Admin\AppData\Local\Temp\Purchase Order_pdf.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:288

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\tmp58EA.tmp
Filesize
1KB

MD5
3b40d727fd57e3e2fc340852cb6d420c

SHA1
8c7264b053d107aea4fabb49c22138e976cabe54

SHA256
55fbfb605c00ea11a54060559712c80cdf2a92c5c678a9ee02bcde0721baeeee

SHA512
d94f8e156ad52aa9b3ef382df7be2ed48194b908afde4b916c0f4a0fd5997369ba1bbb3c073759720e5071872b33ab586e3f910a14cb7422869dffda9b588dda

Download Submit
memory/288-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/288-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/288-73-0x0000000004FC0000-0x0000000004FD4000-memory.dmp

Filesize
80KB

Download
memory/288-72-0x00000000004B0000-0x00000000004F0000-memory.dmp

Filesize
256KB

Download
memory/288-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/288-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/288-71-0x0000000075741000-0x0000000075743000-memory.dmp

Filesize
8KB

Download
memory/288-70-0x0000000000870000-0x00000000008B4000-memory.dmp

Filesize
272KB

Download
memory/288-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/288-65-0x00000000004A309E-mapping.dmp

Download
memory/288-67-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/288-69-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

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

Download
memory/1828-54-0x00000000013C0000-0x000000000149E000-memory.dmp

Filesize
888KB

Download
memory/1828-56-0x0000000005230000-0x00000000052E0000-memory.dmp

Filesize
704KB

Download
memory/1828-55-0x0000000000380000-0x0000000000396000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads