masslogger | 60b290310f67adb0ae186b4b938ca466a6b55653b2519261fa425127f5500a1f

max time kernel
133s
max time network
135s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
09-06-2024 17:07

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General

Target

Stealers/Masslogger/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 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
behavioral23/memory/1420-15-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger

ReZer0 packer 1 IoCs

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

rezer0

resource	yara_rule
behavioral23/memory/2888-11-0x0000000007470000-0x000000000751E000-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-1-5-21-4106386276-4127174233-3637007343-1000\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 opened	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	mouse_2.exe
Key opened	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	mouse_2.exe
Key created	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	mouse_2.exe
Key queried	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	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
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2888 set thread context of 1420	2888	mouse_2.exe	75

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

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/Job

T1053

pid	Process
4436	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1420	mouse_2.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2888	mouse_2.exe
2888	mouse_2.exe
2888	mouse_2.exe
1420	mouse_2.exe
1420	mouse_2.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2888	mouse_2.exe
Token: SeDebugPrivilege	1420	mouse_2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1420	mouse_2.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2888 wrote to memory of 4436	2888	mouse_2.exe	73
PID 2888 wrote to memory of 4436	2888	mouse_2.exe	73
PID 2888 wrote to memory of 4436	2888	mouse_2.exe	73
PID 2888 wrote to memory of 1420	2888	mouse_2.exe	75
PID 2888 wrote to memory of 1420	2888	mouse_2.exe	75
PID 2888 wrote to memory of 1420	2888	mouse_2.exe	75
PID 2888 wrote to memory of 1420	2888	mouse_2.exe	75
PID 2888 wrote to memory of 1420	2888	mouse_2.exe	75
PID 2888 wrote to memory of 1420	2888	mouse_2.exe	75
PID 2888 wrote to memory of 1420	2888	mouse_2.exe	75
PID 2888 wrote to memory of 1420	2888	mouse_2.exe	75

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000\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-1-5-21-4106386276-4127174233-3637007343-1000\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
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2888
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\aqkfZm" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7F2E.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:4436
- C:\Users\Admin\AppData\Local\Temp\Stealers\Masslogger\mouse_2.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:1420

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

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\Microsoft\CLR_v4.0_32\UsageLogs\mouse_2.exe.log

Filesize
1KB

MD5
b4f7a6a57cb46d94b72410eb6a6d45a9

SHA1
69f3596ffa027202d391444b769ceea0ae14c5f7

SHA256
23994ebe221a48ea16ebad51ae0d4b47ccd415ae10581f9405e588d4f6c2523b

SHA512
be6da516e54c3a5b33ac2603137a2f8cf8445ff5961dd266faedf3627bae8979953d7ef305538df0151c609917a5b99bf5d023bdd32de50fd5c723950f90db5c

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7F2E.tmp

Filesize
1KB

MD5
ce5bab798e43a938723a716fcd6021a5

SHA1
06c3ef2d58e7ce95c4517d6c7b87e135e42ae6f9

SHA256
4c077d5e55a7d8639225b4a92c2ca62f8663302afd563b17813ec25aefeb4e3f

SHA512
856f84011de8ed3db493111548e8bc5d6e02903313846c4d74ab13a7bf5a56a0e35828b1a71b9a5edfc1a29c87ced15dfc3cec5c9ba763977811303d368735d9

Download Submit
memory/1420-44-0x0000000073050000-0x000000007373E000-memory.dmp

Filesize
6.9MB

Download
memory/1420-33-0x0000000007FB0000-0x0000000008000000-memory.dmp

Filesize
320KB

Download
memory/1420-22-0x00000000056D0000-0x0000000005736000-memory.dmp

Filesize
408KB

Download
memory/1420-21-0x0000000073050000-0x000000007373E000-memory.dmp

Filesize
6.9MB

Download
memory/1420-20-0x0000000073050000-0x000000007373E000-memory.dmp

Filesize
6.9MB

Download
memory/1420-18-0x0000000005520000-0x0000000005564000-memory.dmp

Filesize
272KB

Download
memory/1420-15-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2888-3-0x000000000B4D0000-0x000000000B9CE000-memory.dmp

Filesize
5.0MB

Download
memory/2888-10-0x00000000072D0000-0x000000000736C000-memory.dmp

Filesize
624KB

Download
memory/2888-11-0x0000000007470000-0x000000000751E000-memory.dmp

Filesize
696KB

Download
memory/2888-9-0x0000000073050000-0x000000007373E000-memory.dmp

Filesize
6.9MB

Download
memory/2888-8-0x000000007305E000-0x000000007305F000-memory.dmp

Filesize
4KB

Download
memory/2888-19-0x0000000073050000-0x000000007373E000-memory.dmp

Filesize
6.9MB

Download
memory/2888-7-0x0000000005E30000-0x0000000005E38000-memory.dmp

Filesize
32KB

Download
memory/2888-6-0x0000000005AA0000-0x0000000005AAA000-memory.dmp

Filesize
40KB

Download
memory/2888-0-0x000000007305E000-0x000000007305F000-memory.dmp

Filesize
4KB

Download
memory/2888-5-0x0000000073050000-0x000000007373E000-memory.dmp

Filesize
6.9MB

Download
memory/2888-4-0x000000000B1B0000-0x000000000B242000-memory.dmp

Filesize
584KB

Download
memory/2888-2-0x0000000007D10000-0x0000000007DD0000-memory.dmp

Filesize
768KB

Download
memory/2888-1-0x0000000000FA0000-0x000000000109C000-memory.dmp

Filesize
1008KB

Download