masslogger | 60b290310f67adb0ae186b4b938ca466a6b55653b2519261fa425127f5500a1f

Resubmissions

21/11/2025, 18:12

251121-wtl9vadq3v

11/11/2025, 00:19

251111-amds8swmcl10

11/05/2025, 06:45

250511-hjhl1swwbv10

Analysis

max time kernel
898s
max time network
439s
platform
windows11-21h2_x64
resource
win11-20251015-en
resource tags

arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
submitted
11/11/2025, 00:19

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General

Target
Stealers/Masslogger/mouse_2.exe
Size 984KB
Sample251111-amds8swmcl
SHA256 03968a3a5a7a880feefca31686fcfbed445080a0c06eda2b6d623757179b782c
MD5 af8ab92992ccc4cc6a637953836edf93
SHA1 ac17c77cae31fdfeb618b0083285ba869baf29fc
SHA512 9dc3bdfe45f9333d62ef3b0aaf3860a9ef1e94ced02ed0437d3ac2f96b3b9aacf6e621703f13d62f356bd50dec84cc3a3dc787a8a14c9ce0ceeed9ff63c45ad2
SSDEEP 24576:iNg+tKkEYA7Gmvv/HGsvPw9vz/DrELE7VUH:0g4K7YA7vvRMbcLa
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

collection discovery execution masslogger persistence 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
behavioral14/memory/4724-12-0x0000000000400000-0x00000000004A8000-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
behavioral14/memory/2728-8-0x00000000077B0000-0x000000000785E000-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-1-5-21-1372747213-2971725360-2986618536-1000\Control Panel\International\Geo\Nation	mouse_2.exe

Executes dropped EXE 6 IoCs

pid	Process
804	aqkfZm.exe
4136	aqkfZm.exe
1816	aqkfZm.exe
3828	aqkfZm.exe
908	aqkfZm.exe
1932	aqkfZm.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 15 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Office\16.0\Outlook\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
1	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2728 set thread context of 4724	2728	mouse_2.exe	80

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 4 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	aqkfZm.exe
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
3728	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4724	mouse_2.exe

Suspicious behavior: EnumeratesProcesses 18 IoCs

pid	Process
2728	mouse_2.exe
2728	mouse_2.exe
2728	mouse_2.exe
804	aqkfZm.exe
804	aqkfZm.exe
804	aqkfZm.exe
4724	mouse_2.exe
4724	mouse_2.exe
804	aqkfZm.exe
804	aqkfZm.exe
804	aqkfZm.exe
804	aqkfZm.exe
804	aqkfZm.exe
804	aqkfZm.exe
804	aqkfZm.exe
804	aqkfZm.exe
804	aqkfZm.exe
804	aqkfZm.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2728	mouse_2.exe
Token: SeDebugPrivilege	804	aqkfZm.exe
Token: SeDebugPrivilege	4724	mouse_2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4724	mouse_2.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2728 wrote to memory of 3728	2728	mouse_2.exe	78
PID 2728 wrote to memory of 3728	2728	mouse_2.exe	78
PID 2728 wrote to memory of 3728	2728	mouse_2.exe	78
PID 2728 wrote to memory of 4724	2728	mouse_2.exe	80
PID 2728 wrote to memory of 4724	2728	mouse_2.exe	80
PID 2728 wrote to memory of 4724	2728	mouse_2.exe	80
PID 2728 wrote to memory of 4724	2728	mouse_2.exe	80
PID 2728 wrote to memory of 4724	2728	mouse_2.exe	80
PID 2728 wrote to memory of 4724	2728	mouse_2.exe	80
PID 2728 wrote to memory of 4724	2728	mouse_2.exe	80
PID 2728 wrote to memory of 4724	2728	mouse_2.exe	80
PID 804 wrote to memory of 4136	804	aqkfZm.exe	84
PID 804 wrote to memory of 4136	804	aqkfZm.exe	84
PID 804 wrote to memory of 4136	804	aqkfZm.exe	84
PID 804 wrote to memory of 1816	804	aqkfZm.exe	85
PID 804 wrote to memory of 1816	804	aqkfZm.exe	85
PID 804 wrote to memory of 1816	804	aqkfZm.exe	85
PID 804 wrote to memory of 3828	804	aqkfZm.exe	86
PID 804 wrote to memory of 3828	804	aqkfZm.exe	86
PID 804 wrote to memory of 3828	804	aqkfZm.exe	86
PID 804 wrote to memory of 908	804	aqkfZm.exe	87
PID 804 wrote to memory of 908	804	aqkfZm.exe	87
PID 804 wrote to memory of 908	804	aqkfZm.exe	87
PID 804 wrote to memory of 1932	804	aqkfZm.exe	88
PID 804 wrote to memory of 1932	804	aqkfZm.exe	88
PID 804 wrote to memory of 1932	804	aqkfZm.exe	88

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-1372747213-2971725360-2986618536-1000\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-1-5-21-1372747213-2971725360-2986618536-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe

C:\Users\Admin\AppData\Local\Temp\Stealers\Masslogger\mouse_2.exe
"C:\Users\Admin\AppData\Local\Temp\Stealers\Masslogger\mouse_2.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2728
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\aqkfZm" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB263.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3728
- C:\Users\Admin\AppData\Local\Temp\Stealers\Masslogger\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:4724

C:\Users\Admin\AppData\Roaming\aqkfZm.exe
C:\Users\Admin\AppData\Roaming\aqkfZm.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:804
- C:\Users\Admin\AppData\Roaming\aqkfZm.exe
  "{path}"
  2⤵
  - Executes dropped EXE
  PID:4136
- C:\Users\Admin\AppData\Roaming\aqkfZm.exe
  "{path}"
  2⤵
  - Executes dropped EXE
  PID:1816
- C:\Users\Admin\AppData\Roaming\aqkfZm.exe
  "{path}"
  2⤵
  - Executes dropped EXE
  PID:3828
- C:\Users\Admin\AppData\Roaming\aqkfZm.exe
  "{path}"
  2⤵
  - Executes dropped EXE
  PID:908
- C:\Users\Admin\AppData\Roaming\aqkfZm.exe
  "{path}"
  2⤵
  - Executes dropped EXE
  PID:1932

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

mouse_2.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\mouse_2.exe.log
Size 1KB
SHA256 e14e18a79694280818c29ef858fd858ee5b4f4995da9ed096865203284dcc220
MD5 76941aaaab6bbee482734f28d4a14755
SHA1 db728a8c58750de23f4b3efb2a4d112bf22bdb73
SHA512 17b687368de387417317540e83e59991cb3793479fbcb75509f75ae6e06a0135d91679827a1de0775dec9ac05fded857ee4aff7257de9fca90d90dfa8fb660b5
MD5 SHA1 SHA512

Submit Download

tmpB263.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpB263.tmp
Size 1KB
SHA256 8069a8ccabded76ecebf05e2df6801c4942eb6987c3902bc53a9aeb4e91815ed
MD5 7e96ba39c04e38c77a8ebf3225df45fc
SHA1 4a986d9fe4613ff16378f1a05382fd1e3ca70890
SHA512 d20db45df3c92a14a6d60e940f26d1b7bbc3ba5fa5fe22d45e180809e0c99969f4fe5e907d0770ee35b9829b8d2d56a3a58d5c9a60ee20d369c5560abea38c4b
MD5 SHA1 SHA512

Submit Download

aqkfZm.exe

Path C:\Users\Admin\AppData\Roaming\aqkfZm.exe
Size 984KB
SHA256 03968a3a5a7a880feefca31686fcfbed445080a0c06eda2b6d623757179b782c
MD5 af8ab92992ccc4cc6a637953836edf93
SHA1 ac17c77cae31fdfeb618b0083285ba869baf29fc
SHA512 9dc3bdfe45f9333d62ef3b0aaf3860a9ef1e94ced02ed0437d3ac2f96b3b9aacf6e621703f13d62f356bd50dec84cc3a3dc787a8a14c9ce0ceeed9ff63c45ad2
SSDEEP 24576:iNg+tKkEYA7Gmvv/HGsvPw9vz/DrELE7VUH:0g4K7YA7vvRMbcLa
MD5 SHA1 SHA512 SSDEEP

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memory/2728-8-0x00000000077B0000-0x000000000785E000-memory.dmp

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memory/2728-1-0x0000000007F30000-0x0000000007FF0000-memory.dmp

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memory/2728-5-0x0000000005C10000-0x0000000005C1A000-memory.dmp

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memory/2728-6-0x0000000007580000-0x0000000007588000-memory.dmp

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memory/2728-7-0x0000000007590000-0x000000000762C000-memory.dmp

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memory/2728-0-0x0000000000F40000-0x000000000103C000-memory.dmp

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memory/2728-3-0x000000000B7A0000-0x000000000BD46000-memory.dmp

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memory/2728-4-0x000000000B390000-0x000000000B422000-memory.dmp

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memory/2728-2-0x0000000005AA0000-0x0000000005AB0000-memory.dmp

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memory/4724-15-0x0000000005780000-0x00000000057C4000-memory.dmp

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memory/4724-12-0x0000000000400000-0x00000000004A8000-memory.dmp

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memory/4724-18-0x0000000005A30000-0x0000000005A96000-memory.dmp

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memory/4724-29-0x00000000079F0000-0x0000000007A40000-memory.dmp

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memory/4724-37-0x0000000005810000-0x0000000005820000-memory.dmp

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