a310logger | d27b2ee1f364b72f66ea452754cf56477c5028ab5c6ad0041fb97d9c40506639

General

Target

YTHK21082400.exe
Size

6KB
MD5

3ffff737bfe1a900b328599fe9da58b6
SHA1

64a930f90248f8e1702fc29a40860081076a7b38
SHA256

d27b2ee1f364b72f66ea452754cf56477c5028ab5c6ad0041fb97d9c40506639
SHA512

570813e30b91a93f916ec078b3aa2076062e8d2ca22f5b63fdc9708f86ce7444bc2d78f84e4d40ba349feb52133e8581ad3b7fc32cef44ead5c26f9d1e5fe984

Score

10^/10

a310logger blustealer collection spyware stealer

Malware Config

Extracted

Family

blustealer

Credentials

Protocol: smtp
Host:
mail.enche.com
Port:
587
Username:
[email protected]
Password:
Merchandise08012021

Signatures

A310logger
A310 Logger is a .NET stealer/logger targeting passwords from browsers and email clients.
stealer spyware a310logger
BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer

A310logger Executable 2 IoCs

resource	yara_rule
behavioral2/files/0x000100000001ab59-124.dat	a310logger
behavioral2/files/0x000100000001ab59-125.dat	a310logger

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
4008	Fox.exe

Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
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
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe
Key opened	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe
Key opened	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 664 set thread context of 2732	664	YTHK21082400.exe	71

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	664	YTHK21082400.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2732	InstallUtil.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 664 wrote to memory of 2732	664	YTHK21082400.exe	71
PID 664 wrote to memory of 2732	664	YTHK21082400.exe	71
PID 664 wrote to memory of 2732	664	YTHK21082400.exe	71
PID 664 wrote to memory of 2732	664	YTHK21082400.exe	71
PID 664 wrote to memory of 2732	664	YTHK21082400.exe	71
PID 664 wrote to memory of 2732	664	YTHK21082400.exe	71
PID 664 wrote to memory of 2732	664	YTHK21082400.exe	71
PID 664 wrote to memory of 2732	664	YTHK21082400.exe	71
PID 2732 wrote to memory of 4008	2732	InstallUtil.exe	72
PID 2732 wrote to memory of 4008	2732	InstallUtil.exe	72
PID 2732 wrote to memory of 3868	2732	InstallUtil.exe	78
PID 2732 wrote to memory of 3868	2732	InstallUtil.exe	78
PID 2732 wrote to memory of 3868	2732	InstallUtil.exe	78
PID 3868 wrote to memory of 3040	3868	WinMail.exe	79
PID 3868 wrote to memory of 3040	3868	WinMail.exe	79

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe

C:\Users\Admin\AppData\Local\Temp\YTHK21082400.exe
"C:\Users\Admin\AppData\Local\Temp\YTHK21082400.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:664
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2732
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\NET4\Fox.exe
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - outlook_office_path
    - outlook_win_path
    PID:4008
- - C:\Program Files (x86)\Windows Mail\WinMail.exe
    "C:\Program Files (x86)\Windows Mail\WinMail" OCInstallUserConfigOE
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3868
  - - C:\Program Files\Windows Mail\WinMail.exe
      "C:\Program Files\Windows Mail\WinMail" OCInstallUserConfigOE
      4⤵
      PID:3040

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/664-116-0x0000000000EB0000-0x0000000000EB2000-memory.dmp

Filesize
8KB

Download
memory/664-117-0x0000000000E40000-0x0000000000E9F000-memory.dmp

Filesize
380KB

Download
memory/664-118-0x0000000000EA0000-0x0000000000EA1000-memory.dmp

Filesize
4KB

Download
memory/664-114-0x0000000000850000-0x0000000000851000-memory.dmp

Filesize
4KB

Download
memory/2732-119-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/4008-128-0x000000001B690000-0x000000001B692000-memory.dmp

Filesize
8KB

Download
memory/4008-126-0x0000000000890000-0x0000000000891000-memory.dmp

Filesize
4KB

Download

Analysis

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