masslogger | 99dfff5aea67bbe0ac65e9f104f6fd78d7a285022691d21e1ffa6d9643090604

General

Target

cv.exe
Size

3.1MB
MD5

8e2d91235bb4934329abf1a295046231
SHA1

98dc2adc20715025daf23d20c6dcdd0cc7de3b02
SHA256

a500af65cdde463b260205bf423f59e03a3f3ffbff5838af44ad46172d5554b9
SHA512

d7c81f962356951c0e7e6c4cef226579813340397b2275805597bbc15fc9ff1baf937a3695cf2dd35aa0026981d5a6d1a9e52b32a281770b2536cc1372b4629a

Score

10^/10

masslogger collection spyware stealer upx

Malware Config

Extracted

Credentials

Protocol: smtp
Host:
mail.insooryaexpresscargo.com
Port:
587
Username:
[email protected]
Password:
GuG5GK(3m7*Z

Signatures

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

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000600000002313f-418.dat	acprotect

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000600000002313f-418.dat	upx

Drops startup file 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wscript.url	cv.exe

Loads dropped DLL 1 IoCs

pid	Process
4828	MSBuild.exe

Accesses Microsoft Outlook profiles 1 TTPs 18 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	MSBuild.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	MSBuild.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
21	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1512 set thread context of 4828	1512	cv.exe	86

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4828	MSBuild.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
1512	cv.exe
1512	cv.exe
1512	cv.exe
1512	cv.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
1512	cv.exe
1512	cv.exe
1512	cv.exe
1512	cv.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1512 wrote to memory of 4828	1512	cv.exe	86
PID 1512 wrote to memory of 4828	1512	cv.exe	86
PID 1512 wrote to memory of 4828	1512	cv.exe	86
PID 1512 wrote to memory of 4828	1512	cv.exe	86
PID 1512 wrote to memory of 4828	1512	cv.exe	86

outlook_office_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\cv.exe
"C:\Users\Admin\AppData\Local\Temp\cv.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1512
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\\\\Windows\\\\Microsoft.NET\\\\Framework\\\\v4.0.30319\\\\MSBuild.exe"
  2⤵
  - Loads dropped DLL
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:4828

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Costura\8E3603ED8A0381E02887C1DBBE921340\32\sqlite.interop.dll

Filesize
594KB

MD5
e81aeac387c5db32b7f9b07d15e788e0

SHA1
829be6eaf1cb0d82b2ddfc98272e1087f4a7a7c3

SHA256
44f31f99f048bfc5195937353b5207332e455bcd5a722bcfd32cacfd93f60f06

SHA512
cc6a96325a01c50c059706a1f4156f109e502ef9c0b0f5de209d1f52e7cc973cebc027f57ed988e9d1b8fca62746b60ee7430d608de95cdd0e5ac3cb61fbe32e

Download Submit
memory/1512-130-0x0000000003BC0000-0x0000000003E71000-memory.dmp

Filesize
2.7MB

Download
memory/1512-131-0x0000000005720000-0x00000000059D1000-memory.dmp

Filesize
2.7MB

Download
memory/4828-135-0x0000000000500000-0x000000000065E000-memory.dmp

Filesize
1.4MB

Download
memory/4828-134-0x0000000000502000-0x000000000065A000-memory.dmp

Filesize
1.3MB

Download
memory/4828-419-0x0000000004F30000-0x0000000004FC2000-memory.dmp

Filesize
584KB

Download
memory/4828-420-0x0000000005580000-0x0000000005B24000-memory.dmp

Filesize
5.6MB

Download
memory/4828-421-0x0000000005C30000-0x0000000005C96000-memory.dmp

Filesize
408KB

Download
memory/4828-422-0x00000000060B0000-0x00000000060BA000-memory.dmp

Filesize
40KB

Download
memory/4828-423-0x00000000063B0000-0x0000000006400000-memory.dmp

Filesize
320KB

Download
memory/4828-424-0x0000000006960000-0x00000000069FC000-memory.dmp

Filesize
624KB

Download

Analysis

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