masslogger | ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56

General

Target

ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Size

926KB
MD5

12094cb754508166c0827e574092eb81
SHA1

2e1a052471e9d2b50dce06908dae7875ca4716b5
SHA256

ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56
SHA512

e3dc9b82ef9c854f13b3a1c9cd8265773a46ea9e723780d018f9a20c3dc8751f7cb541b41ae0761110d3a23486aeca919257c8d64511b131e4baab844225b193

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 v1.3.7.0 ################################################################# ### 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: 5/24/2022 2:26:50 PM MassLogger Started: 5/24/2022 2:26:43 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.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/1748-61-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1748-62-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1748-63-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1748-64-0x00000000004A2B8E-mapping.dmp	family_masslogger
behavioral1/memory/1748-66-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/1748-68-0x0000000000400000-0x00000000004A8000-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/1672-57-0x0000000005E30000-0x0000000005EDE000-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-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.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-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.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 1672 set thread context of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
1748	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
Token: SeDebugPrivilege	1748	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27
PID 1672 wrote to memory of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27
PID 1672 wrote to memory of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27
PID 1672 wrote to memory of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27
PID 1672 wrote to memory of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27
PID 1672 wrote to memory of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27
PID 1672 wrote to memory of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27
PID 1672 wrote to memory of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27
PID 1672 wrote to memory of 1748	1672	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe	27

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe

outlook_win_path 1 IoCs

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	ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe

C:\Users\Admin\AppData\Local\Temp\ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
"C:\Users\Admin\AppData\Local\Temp\ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Users\Admin\AppData\Local\Temp\ea1c723ceedac998a362db9d383f81e90cd4821ae42749547036247add752a56.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1748

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1672-54-0x0000000000010000-0x0000000000102000-memory.dmp

Filesize
968KB

Download
memory/1672-55-0x0000000005BA0000-0x0000000005C68000-memory.dmp

Filesize
800KB

Download
memory/1672-56-0x0000000000630000-0x0000000000644000-memory.dmp

Filesize
80KB

Download
memory/1672-57-0x0000000005E30000-0x0000000005EDE000-memory.dmp

Filesize
696KB

Download
memory/1748-58-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1748-59-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1748-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1748-62-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1748-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1748-66-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1748-68-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1748-69-0x0000000000750000-0x0000000000794000-memory.dmp

Filesize
272KB

Download
memory/1748-70-0x0000000075B61000-0x0000000075B63000-memory.dmp

Filesize
8KB

Download
memory/1748-71-0x0000000000645000-0x0000000000656000-memory.dmp

Filesize
68KB

Download

Analysis

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