masslogger | 60b290310f67adb0ae186b4b938ca466a6b55653b2519261fa425127f5500a1f

max time kernel
126s
max time network
137s
platform
windows10-1703_x64
resource
win10-20240611-en
resource tags

arch:x64arch:x86image:win10-20240611-enlocale:en-usos:windows10-1703-x64system
submitted
02/09/2024, 02:27

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General

Target
Stealers/Masslogger/mouse_2.exe
Size 984KB
Sample240902-cxh7tazflg
SHA256 03968a3a5a7a880feefca31686fcfbed445080a0c06eda2b6d623757179b782c
MD5 af8ab92992ccc4cc6a637953836edf93
SHA1 ac17c77cae31fdfeb618b0083285ba869baf29fc
SHA512 9dc3bdfe45f9333d62ef3b0aaf3860a9ef1e94ced02ed0437d3ac2f96b3b9aacf6e621703f13d62f356bd50dec84cc3a3dc787a8a14c9ce0ceeed9ff63c45ad2
SSDEEP 24576:iNg+tKkEYA7Gmvv/HGsvPw9vz/DrELE7VUH:0g4K7YA7vvRMbcLa
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

masslogger collection credential_access 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
behavioral14/memory/4496-15-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

ReZer0 packer 1 IoCs

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

rezer0

resource	yara_rule
behavioral14/memory/1848-11-0x0000000004E40000-0x0000000004EEE000-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-1-5-21-1453213197-474736321-1741884505-1000\Control Panel\International\Geo\Nation	mouse_2.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
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 15 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\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
5	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1848 set thread context of 4496	1848	mouse_2.exe	73

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
2264	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4496	mouse_2.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1848	mouse_2.exe
1848	mouse_2.exe
1848	mouse_2.exe
1848	mouse_2.exe
1848	mouse_2.exe
4496	mouse_2.exe
4496	mouse_2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1848	mouse_2.exe
Token: SeDebugPrivilege	4496	mouse_2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4496	mouse_2.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 2264	1848	mouse_2.exe	70
PID 1848 wrote to memory of 2264	1848	mouse_2.exe	70
PID 1848 wrote to memory of 2264	1848	mouse_2.exe	70
PID 1848 wrote to memory of 4860	1848	mouse_2.exe	72
PID 1848 wrote to memory of 4860	1848	mouse_2.exe	72
PID 1848 wrote to memory of 4860	1848	mouse_2.exe	72
PID 1848 wrote to memory of 4496	1848	mouse_2.exe	73
PID 1848 wrote to memory of 4496	1848	mouse_2.exe	73
PID 1848 wrote to memory of 4496	1848	mouse_2.exe	73
PID 1848 wrote to memory of 4496	1848	mouse_2.exe	73
PID 1848 wrote to memory of 4496	1848	mouse_2.exe	73
PID 1848 wrote to memory of 4496	1848	mouse_2.exe	73
PID 1848 wrote to memory of 4496	1848	mouse_2.exe	73
PID 1848 wrote to memory of 4496	1848	mouse_2.exe	73

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-1453213197-474736321-1741884505-1000\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-1-5-21-1453213197-474736321-1741884505-1000\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:1848
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\aqkfZm" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1061.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2264
- C:\Users\Admin\AppData\Local\Temp\Stealers\Masslogger\mouse_2.exe
  "{path}"
  2⤵
  PID:4860
- 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:4496

Network

MITRE ATT&CK Enterprise v15

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

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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 23994ebe221a48ea16ebad51ae0d4b47ccd415ae10581f9405e588d4f6c2523b
MD5 b4f7a6a57cb46d94b72410eb6a6d45a9
SHA1 69f3596ffa027202d391444b769ceea0ae14c5f7
SHA512 be6da516e54c3a5b33ac2603137a2f8cf8445ff5961dd266faedf3627bae8979953d7ef305538df0151c609917a5b99bf5d023bdd32de50fd5c723950f90db5c
MD5 SHA1 SHA512

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tmp1061.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp1061.tmp
Size 1KB
SHA256 8c14e183153e6d1b6635f6c44688a728e9a831a41ec44a2c77b5acb17b3e90ed
MD5 2af1dcbc20fa703134363a612ba92d45
SHA1 d77a879674c910aafd997e21bc484e42013e6fc7
SHA512 728f32fbfd8668de6aa591b26f299825f73c2ee89b653509baa6a6ab437d61f755f0f7d60960eefb4339d44044b08fa3de91af4050229254c6472088911a51ad
MD5 SHA1 SHA512

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memory/1848-10-0x000000000D5E0000-0x000000000D67C000-memory.dmp

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memory/1848-18-0x0000000073960000-0x000000007404E000-memory.dmp

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memory/1848-4-0x0000000073960000-0x000000007404E000-memory.dmp

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memory/1848-5-0x000000000A790000-0x000000000A822000-memory.dmp

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memory/1848-6-0x000000000A730000-0x000000000A73A000-memory.dmp

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memory/1848-7-0x000000000AAA0000-0x000000000AAA8000-memory.dmp

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memory/1848-8-0x000000007396E000-0x000000007396F000-memory.dmp

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memory/1848-9-0x0000000073960000-0x000000007404E000-memory.dmp

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memory/1848-0-0x000000007396E000-0x000000007396F000-memory.dmp

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memory/1848-11-0x0000000004E40000-0x0000000004EEE000-memory.dmp

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memory/1848-2-0x00000000072F0000-0x00000000073B0000-memory.dmp

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memory/1848-3-0x000000000AAB0000-0x000000000AFAE000-memory.dmp

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memory/1848-1-0x0000000000560000-0x000000000065C000-memory.dmp

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memory/4496-15-0x0000000000400000-0x00000000004A8000-memory.dmp

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memory/4496-19-0x0000000073960000-0x000000007404E000-memory.dmp

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memory/4496-20-0x0000000005540000-0x0000000005584000-memory.dmp

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memory/4496-21-0x0000000073960000-0x000000007404E000-memory.dmp

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memory/4496-22-0x00000000056F0000-0x0000000005756000-memory.dmp

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memory/4496-30-0x0000000073960000-0x000000007404E000-memory.dmp

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memory/4496-31-0x0000000073960000-0x000000007404E000-memory.dmp

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memory/4496-35-0x0000000007E90000-0x0000000007EE0000-memory.dmp

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