masslogger | 73a8cacd0330bf03a7483a32d6a83c99cdc9f762a7ce3bb803690766a40ff0bc

General

Target

Signed Order.exe
Size

833KB
MD5

ce15880c3f11a7dd4f9d9e1bb8b20e4c
SHA1

0a2d2b8b0ca04f361e523272f7ca9cd8810aaf3b
SHA256

e34e95979aaed4ee253e5224183636c2da9f5f0ea21e552ba8d9c472c3cb2dac
SHA512

93714bfadc8b4fe80092f93d0158ec93cf607d08c6f50695e14974818a4109e66f727e3ba836c28e61e3d3c90f3dd7842f009db0d5b975247fcecb3eb784865d

Score

10^/10

masslogger collection ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\3B8E3C2477\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.7.1 ################################################################# ### 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 2:10:15 PM MassLogger Started: 5/21/2022 2:10:01 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Signed Order.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

resource	yara_rule
behavioral1/memory/852-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/852-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/852-64-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/852-65-0x00000000004A2D3E-mapping.dmp	family_masslogger
behavioral1/memory/852-67-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/852-69-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral1/memory/1272-56-0x00000000004B0000-0x000000000055E000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation	Signed Order.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

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Signed Order.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Signed Order.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Signed Order.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Signed Order.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Signed Order.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Signed Order.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.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.

flow	ioc
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1272 set thread context of 852	1272	Signed Order.exe	30

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

pid	Process
1792	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
852	Signed Order.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
852	Signed Order.exe
852	Signed Order.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	852	Signed Order.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
852	Signed Order.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1272 wrote to memory of 1792	1272	Signed Order.exe	28
PID 1272 wrote to memory of 1792	1272	Signed Order.exe	28
PID 1272 wrote to memory of 1792	1272	Signed Order.exe	28
PID 1272 wrote to memory of 1792	1272	Signed Order.exe	28
PID 1272 wrote to memory of 852	1272	Signed Order.exe	30
PID 1272 wrote to memory of 852	1272	Signed Order.exe	30
PID 1272 wrote to memory of 852	1272	Signed Order.exe	30
PID 1272 wrote to memory of 852	1272	Signed Order.exe	30
PID 1272 wrote to memory of 852	1272	Signed Order.exe	30
PID 1272 wrote to memory of 852	1272	Signed Order.exe	30
PID 1272 wrote to memory of 852	1272	Signed Order.exe	30
PID 1272 wrote to memory of 852	1272	Signed Order.exe	30
PID 1272 wrote to memory of 852	1272	Signed Order.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Signed Order.exe

C:\Users\Admin\AppData\Local\Temp\Signed Order.exe
"C:\Users\Admin\AppData\Local\Temp\Signed Order.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1272
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yUHtlQEtsgt" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2943.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1792
- C:\Users\Admin\AppData\Local\Temp\Signed Order.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:852

Network

MITRE ATT&CK Enterprise 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

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp2943.tmp

Filesize
1KB

MD5
cf0cdab36d41b927bdb6935deb3b5af0

SHA1
f1c114760c31c634a9d7f51a9b4b3f84cb849777

SHA256
ece38c5c25e1d9759c95ef90eac50ddaf72f97ee56ac3c27a53239f0822523ed

SHA512
66d59088a27faa5918aec88fc53dac008987f2e25bbfc101760f4275120af3223df0293c30324de1413f8bebfd4e37d8b5385503498b201f237be672d5266caa

Download Submit
memory/852-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/852-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/852-72-0x0000000004BE5000-0x0000000004BF6000-memory.dmp

Filesize
68KB

Download
memory/852-71-0x0000000076171000-0x0000000076173000-memory.dmp

Filesize
8KB

Download
memory/852-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/852-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/852-70-0x0000000000600000-0x0000000000644000-memory.dmp

Filesize
272KB

Download
memory/852-69-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/852-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/852-67-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1272-54-0x0000000000860000-0x0000000000936000-memory.dmp

Filesize
856KB

Download
memory/1272-56-0x00000000004B0000-0x000000000055E000-memory.dmp

Filesize
696KB

Download
memory/1272-55-0x0000000000350000-0x0000000000360000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads