masslogger | 38bc13ef112b2f17d4d1a80243fac6a521b5d58228984aae0752d79487fa3b66

Resubmissions

15/04/2025, 17:34

250415-v5ylksypw9 10

15/04/2025, 06:16

14/04/2025, 08:06

14/04/2025, 07:59

14/04/2025, 07:22

14/04/2025, 07:16

11/04/2025, 21:39

01/04/2025, 21:24

Analysis

max time kernel
97s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20250410-en
resource tags

arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
submitted
14/04/2025, 08:06

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General

Target

mouse_2.exe
Size

984KB
MD5

af8ab92992ccc4cc6a637953836edf93
SHA1

ac17c77cae31fdfeb618b0083285ba869baf29fc
SHA256

03968a3a5a7a880feefca31686fcfbed445080a0c06eda2b6d623757179b782c
SHA512

9dc3bdfe45f9333d62ef3b0aaf3860a9ef1e94ced02ed0437d3ac2f96b3b9aacf6e621703f13d62f356bd50dec84cc3a3dc787a8a14c9ce0ceeed9ff63c45ad2
SSDEEP

24576:iNg+tKkEYA7Gmvv/HGsvPw9vz/DrELE7VUH:0g4K7YA7vvRMbcLa

Score

10^/10

masslogger collection discovery rezer0 spyware stealer

Malware Config

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger Main payload 1 IoCs

resource	yara_rule
behavioral21/memory/4900-15-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger

Masslogger family
masslogger

ReZer0 packer 1 IoCs

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

rezer0

resource	yara_rule
behavioral21/memory/2152-11-0x0000000004FF0000-0x000000000509E000-memory.dmp	rezer0

Checks computer location settings 2 TTPs 2 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-1-5-21-2645532622-3298555945-705856666-1000\Control Panel\International\Geo\Nation	mouse_2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\Control Panel\International\Geo\Nation	mouse_2.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook profiles 1 TTPs 18 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.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
33	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2152 set thread context of 4900	2152	mouse_2.exe	93

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mouse_2.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mouse_2.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2348	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4900	mouse_2.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2152	mouse_2.exe
2152	mouse_2.exe
2152	mouse_2.exe
4900	mouse_2.exe
4900	mouse_2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2152	mouse_2.exe
Token: SeDebugPrivilege	4900	mouse_2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4900	mouse_2.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 2348	2152	mouse_2.exe	91
PID 2152 wrote to memory of 2348	2152	mouse_2.exe	91
PID 2152 wrote to memory of 2348	2152	mouse_2.exe	91
PID 2152 wrote to memory of 4900	2152	mouse_2.exe	93
PID 2152 wrote to memory of 4900	2152	mouse_2.exe	93
PID 2152 wrote to memory of 4900	2152	mouse_2.exe	93
PID 2152 wrote to memory of 4900	2152	mouse_2.exe	93
PID 2152 wrote to memory of 4900	2152	mouse_2.exe	93
PID 2152 wrote to memory of 4900	2152	mouse_2.exe	93
PID 2152 wrote to memory of 4900	2152	mouse_2.exe	93
PID 2152 wrote to memory of 4900	2152	mouse_2.exe	93

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2645532622-3298555945-705856666-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe

C:\Users\Admin\AppData\Local\Temp\mouse_2.exe
"C:\Users\Admin\AppData\Local\Temp\mouse_2.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2152
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\aqkfZm" /XML "C:\Users\Admin\AppData\Local\Temp\tmp947B.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2348
- C:\Users\Admin\AppData\Local\Temp\mouse_2.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Accesses Microsoft Outlook profiles
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:4900

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp947B.tmp

Filesize
1KB

MD5
52d7c07c6a9fc2d32427b98477753b0d

SHA1
c2f5b302c5c9984d0a31b067e51858f483b2a881

SHA256
f52761b15c4be0d0f1b5cc6ab9aa2101f0832b5c26ae9a12a872eb5338bacbca

SHA512
8e7847a012e83e0f3983bcf82edadc83f088e082b24115b55ecb7663a03a86eb9037b137e4901078f8451e11e0871e287f20a270eadc7437bce1e9c1c8802ebe

Download Submit
memory/2152-6-0x0000000005160000-0x000000000516A000-memory.dmp

Filesize
40KB

Download
memory/2152-7-0x0000000006730000-0x0000000006738000-memory.dmp

Filesize
32KB

Download
memory/2152-3-0x000000000ACE0000-0x000000000B284000-memory.dmp

Filesize
5.6MB

Download
memory/2152-5-0x000000000A8D0000-0x000000000A962000-memory.dmp

Filesize
584KB

Download
memory/2152-4-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/2152-0-0x0000000074E6E000-0x0000000074E6F000-memory.dmp

Filesize
4KB

Download
memory/2152-1-0x0000000000580000-0x000000000067C000-memory.dmp

Filesize
1008KB

Download
memory/2152-8-0x0000000074E6E000-0x0000000074E6F000-memory.dmp

Filesize
4KB

Download
memory/2152-9-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/2152-10-0x0000000000ED0000-0x0000000000F6C000-memory.dmp

Filesize
624KB

Download
memory/2152-2-0x0000000007470000-0x0000000007530000-memory.dmp

Filesize
768KB

Download
memory/2152-11-0x0000000004FF0000-0x000000000509E000-memory.dmp

Filesize
696KB

Download
memory/2152-20-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/4900-17-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/4900-18-0x00000000054A0000-0x00000000054E4000-memory.dmp

Filesize
272KB

Download
memory/4900-19-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/4900-15-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/4900-21-0x0000000005800000-0x0000000005866000-memory.dmp

Filesize
408KB

Download
memory/4900-22-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/4900-30-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/4900-31-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/4900-35-0x00000000082A0000-0x00000000082F0000-memory.dmp

Filesize
320KB

Download
memory/4900-43-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download
memory/4900-47-0x0000000074E60000-0x0000000075610000-memory.dmp

Filesize
7.7MB

Download