masslogger | e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3

General

Target

e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Size

789KB
MD5

b716d85bbaee06cea80c5d5eb8f9d965
SHA1

2c5b15f20d9d698f33a656c5ea76ed372f96f65b
SHA256

e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3
SHA512

b9093c79128bfbe76740de770055c2bc8e5b9cde9046f4f3d5c6e8c86ea47f60cffd1f3ef7c382a1b0e257466162365905c85ced5668264cdcd1e32e18f9a905

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: 127.0.0.1 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: 5/25/2022 1:35:19 AM MassLogger Started: 5/25/2022 1:34:58 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.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/2016-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2016-65-0x00000000004A2ECE-mapping.dmp	family_masslogger
behavioral1/memory/2016-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2016-69-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2016-67-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2016-64-0x0000000000400000-0x00000000004A8000-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/364-56-0x0000000005560000-0x000000000560E000-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	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.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 opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
Key created	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.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 364 set thread context of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.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
1096	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2016	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2016	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
2016	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2016	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2016	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 364 wrote to memory of 1096	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	28
PID 364 wrote to memory of 1096	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	28
PID 364 wrote to memory of 1096	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	28
PID 364 wrote to memory of 1096	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	28
PID 364 wrote to memory of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	30
PID 364 wrote to memory of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	30
PID 364 wrote to memory of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	30
PID 364 wrote to memory of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	30
PID 364 wrote to memory of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	30
PID 364 wrote to memory of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	30
PID 364 wrote to memory of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	30
PID 364 wrote to memory of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe	30
PID 364 wrote to memory of 2016	364	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.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	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.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	e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe

C:\Users\Admin\AppData\Local\Temp\e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe
"C:\Users\Admin\AppData\Local\Temp\e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:364
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PvKSHQfyvmnXd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp70BE.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1096
- C:\Users\Admin\AppData\Local\Temp\e4dff6694f28d833ff1087e64c1498c9c9232abdcebf324bffdcbe322a125bb3.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:2016

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp70BE.tmp

Filesize
1KB

MD5
f62055e93f4127d2d31226277f05a007

SHA1
f3ce4545c6a80b40e31ebd9802db500ad2b49eb7

SHA256
06ae00c242ef76db2bbbe7058e89f7c640f24baa98029e566ac4a7784d6fb600

SHA512
2d37f8d7a4ba7515ab32c0103f703bdb322df108db11e7abf58e96dd60aa77a9e2812eee70d3f0aeca38c751dde32f2a545b311aa6adf6fd83886c0fff872582

Download Submit
memory/364-54-0x00000000010C0000-0x000000000118C000-memory.dmp

Filesize
816KB

Download
memory/364-55-0x0000000000320000-0x0000000000328000-memory.dmp

Filesize
32KB

Download
memory/364-56-0x0000000005560000-0x000000000560E000-memory.dmp

Filesize
696KB

Download
memory/2016-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2016-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2016-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2016-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2016-69-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2016-67-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2016-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2016-70-0x0000000000890000-0x00000000008D4000-memory.dmp

Filesize
272KB

Download
memory/2016-71-0x00000000752A1000-0x00000000752A3000-memory.dmp

Filesize
8KB

Download
memory/2016-72-0x0000000004E75000-0x0000000004E86000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads