masslogger | 92ada9f6219ca67d776271d49eeda8fc231b0d9a98b46686d5318261fd116d15

General

Target

LYUoz7EXa2f53y3.exe
Size

864KB
MD5

1274d72e82a4a389f9bd063c4b025bc0
SHA1

42bcb1cbe89361be9d538dffd2b71429ad7070cf
SHA256

641fe8dbcfc7cf68d594eda921ce75269e4d3bb74a02b7116facb091020f0806
SHA512

9699256cd3b4bea5a0230536639a00ae3ee41b6ff3cea851a31bf49d3a33af30a85a21921edd58321d85d3f19fce2b6a9eb95e2231f24da5b0df2e2d4d6ee0cc
SSDEEP

24576:plv9Wc7NBpneCf6vw3j+7Tx3B4mNJA9fyRvZsAALCvoR:plv9Wc7/peCf6vkjkTn4ky9VLmC

Score

10^/10

masslogger collection rezer0 spyware stealer

Malware Config

Extracted

Credentials

Protocol: smtp
Host:
mail.mytravelexplorer.com
Port:
587
Username:
[email protected]
Password:
43K+H2..0_g^

Signatures

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

MassLogger Main payload 5 IoCs

resource	yara_rule
behavioral1/memory/2908-18-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2908-21-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2908-16-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2908-13-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger
behavioral1/memory/2908-12-0x0000000000400000-0x00000000004A8000-memory.dmp	family_masslogger

ReZer0 packer 1 IoCs

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

rezer0

resource	yara_rule
behavioral1/memory/2032-5-0x0000000005870000-0x000000000591E000-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-1-5-21-268080393-3149932598-1824759070-1000\Control Panel\International\Geo\Nation	LYUoz7EXa2f53y3.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-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe
Key opened	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe
Key created	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe
Key created	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	LYUoz7EXa2f53y3.exe
Key queried	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	LYUoz7EXa2f53y3.exe
Key queried	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	LYUoz7EXa2f53y3.exe
Key queried	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	LYUoz7EXa2f53y3.exe
Key queried	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe
Key queried	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe
Key opened	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe
Key created	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe
Key created	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	LYUoz7EXa2f53y3.exe
Key created	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	LYUoz7EXa2f53y3.exe
Key created	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe
Key queried	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.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
2	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2032 set thread context of 2908	2032	LYUoz7EXa2f53y3.exe	32

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
2100	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2908	LYUoz7EXa2f53y3.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2908	LYUoz7EXa2f53y3.exe
2908	LYUoz7EXa2f53y3.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2908	LYUoz7EXa2f53y3.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2908	LYUoz7EXa2f53y3.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 2100	2032	LYUoz7EXa2f53y3.exe	30
PID 2032 wrote to memory of 2100	2032	LYUoz7EXa2f53y3.exe	30
PID 2032 wrote to memory of 2100	2032	LYUoz7EXa2f53y3.exe	30
PID 2032 wrote to memory of 2100	2032	LYUoz7EXa2f53y3.exe	30
PID 2032 wrote to memory of 2908	2032	LYUoz7EXa2f53y3.exe	32
PID 2032 wrote to memory of 2908	2032	LYUoz7EXa2f53y3.exe	32
PID 2032 wrote to memory of 2908	2032	LYUoz7EXa2f53y3.exe	32
PID 2032 wrote to memory of 2908	2032	LYUoz7EXa2f53y3.exe	32
PID 2032 wrote to memory of 2908	2032	LYUoz7EXa2f53y3.exe	32
PID 2032 wrote to memory of 2908	2032	LYUoz7EXa2f53y3.exe	32
PID 2032 wrote to memory of 2908	2032	LYUoz7EXa2f53y3.exe	32
PID 2032 wrote to memory of 2908	2032	LYUoz7EXa2f53y3.exe	32
PID 2032 wrote to memory of 2908	2032	LYUoz7EXa2f53y3.exe	32

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	LYUoz7EXa2f53y3.exe

C:\Users\Admin\AppData\Local\Temp\LYUoz7EXa2f53y3.exe
"C:\Users\Admin\AppData\Local\Temp\LYUoz7EXa2f53y3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\DiExUVCDQV" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4CAA.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2100
- C:\Users\Admin\AppData\Local\Temp\LYUoz7EXa2f53y3.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:2908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4CAA.tmp

Filesize
1KB

MD5
0a23950b15603f656ce2b87fc7e18538

SHA1
3103a8c3f22a1976a61b53a2b3fcba3c44f73577

SHA256
3f05f922f9e9ef66a346c2e7ed28b7d672d79a2793f7abfd9b73591510e498af

SHA512
fa56e2a0e685b6e0b7af66a5f00f338f9bf7b1d65d007f132c8777bdba3750b9a8c78a92260d2ba3f0de4f37b5945dc6c2094015cba97b1f9b6125cea3a73add

Download Submit
memory/2032-23-0x0000000074730000-0x0000000074E1E000-memory.dmp

Filesize
6.9MB

Download
memory/2032-1-0x0000000001260000-0x000000000133E000-memory.dmp

Filesize
888KB

Download
memory/2032-2-0x0000000000200000-0x0000000000212000-memory.dmp

Filesize
72KB

Download
memory/2032-3-0x000000007473E000-0x000000007473F000-memory.dmp

Filesize
4KB

Download
memory/2032-4-0x0000000074730000-0x0000000074E1E000-memory.dmp

Filesize
6.9MB

Download
memory/2032-5-0x0000000005870000-0x000000000591E000-memory.dmp

Filesize
696KB

Download
memory/2032-6-0x0000000074730000-0x0000000074E1E000-memory.dmp

Filesize
6.9MB

Download
memory/2032-0-0x000000007473E000-0x000000007473F000-memory.dmp

Filesize
4KB

Download
memory/2908-10-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2908-21-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2908-16-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2908-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2908-13-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2908-12-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2908-11-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2908-22-0x00000000006B0000-0x00000000006F4000-memory.dmp

Filesize
272KB

Download
memory/2908-18-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2908-41-0x0000000000E80000-0x0000000000E94000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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