a310logger | 980ff35a7cf5a6557b96df3d9956a133163d91d1691ccf7c1b752bdc0aa4ff2b

General

Target

Halkbank_Ekstre_20211110089273_0838736543566.exe
Size

762KB
MD5

a9ad148eb1e943000ff55d94820da73c
SHA1

4131afbaa43d4c405e5e5c046065d12456cf8d22
SHA256

980ff35a7cf5a6557b96df3d9956a133163d91d1691ccf7c1b752bdc0aa4ff2b
SHA512

5c88f18eee0ec5e04b9f582f327f1fa125657c4ca9c6b1160ca6dcb900662f7e52529475a6867dbfecca04b69d816dd52ba99bb479fd2e6e4f7165f7af460a22

Score

10^/10

a310logger blustealer collection spyware stealer suricata

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
suricata: ET MALWARE a310Logger Stealer Exfil (SMTP)
suricata: ET MALWARE a310Logger Stealer Exfil (SMTP)
suricata

A310logger Executable 2 IoCs

resource	yara_rule
behavioral2/files/0x000400000001abe5-129.dat	a310logger
behavioral2/files/0x000400000001abe5-130.dat	a310logger

Executes dropped EXE 1 IoCs

pid	Process
2552	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-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe
Key opened	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe
Key opened	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\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 1680 set thread context of 1292	1680	Halkbank_Ekstre_20211110089273_0838736543566.exe	72

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1292	Halkbank_Ekstre_20211110089273_0838736543566.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 1292	1680	Halkbank_Ekstre_20211110089273_0838736543566.exe	72
PID 1680 wrote to memory of 1292	1680	Halkbank_Ekstre_20211110089273_0838736543566.exe	72
PID 1680 wrote to memory of 1292	1680	Halkbank_Ekstre_20211110089273_0838736543566.exe	72
PID 1680 wrote to memory of 1292	1680	Halkbank_Ekstre_20211110089273_0838736543566.exe	72
PID 1680 wrote to memory of 1292	1680	Halkbank_Ekstre_20211110089273_0838736543566.exe	72
PID 1680 wrote to memory of 1292	1680	Halkbank_Ekstre_20211110089273_0838736543566.exe	72
PID 1680 wrote to memory of 1292	1680	Halkbank_Ekstre_20211110089273_0838736543566.exe	72
PID 1680 wrote to memory of 1292	1680	Halkbank_Ekstre_20211110089273_0838736543566.exe	72
PID 1292 wrote to memory of 2552	1292	Halkbank_Ekstre_20211110089273_0838736543566.exe	73
PID 1292 wrote to memory of 2552	1292	Halkbank_Ekstre_20211110089273_0838736543566.exe	73
PID 1292 wrote to memory of 1424	1292	Halkbank_Ekstre_20211110089273_0838736543566.exe	76
PID 1292 wrote to memory of 1424	1292	Halkbank_Ekstre_20211110089273_0838736543566.exe	76
PID 1292 wrote to memory of 1424	1292	Halkbank_Ekstre_20211110089273_0838736543566.exe	76
PID 1424 wrote to memory of 2312	1424	WinMail.exe	77
PID 1424 wrote to memory of 2312	1424	WinMail.exe	77

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Fox.exe

C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20211110089273_0838736543566.exe
"C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20211110089273_0838736543566.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20211110089273_0838736543566.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank_Ekstre_20211110089273_0838736543566.exe"
  2⤵
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1292
- - 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:2552
- - C:\Program Files (x86)\Windows Mail\WinMail.exe
    "C:\Program Files (x86)\Windows Mail\WinMail" OCInstallUserConfigOE
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1424
  - - C:\Program Files\Windows Mail\WinMail.exe
      "C:\Program Files\Windows Mail\WinMail" OCInstallUserConfigOE
      4⤵
      PID:2312

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1292-124-0x0000000000400000-0x000000000045B000-memory.dmp

Filesize
364KB

Download
memory/1292-127-0x0000000000AD0000-0x0000000000ADA000-memory.dmp

Filesize
40KB

Download
memory/1292-126-0x0000000000AD0000-0x0000000000AD6000-memory.dmp

Filesize
24KB

Download
memory/1680-121-0x0000000005B20000-0x0000000005B31000-memory.dmp

Filesize
68KB

Download
memory/1680-123-0x0000000007FB0000-0x000000000802D000-memory.dmp

Filesize
500KB

Download
memory/1680-122-0x0000000007D60000-0x0000000007D61000-memory.dmp

Filesize
4KB

Download
memory/1680-115-0x0000000000D70000-0x0000000000D71000-memory.dmp

Filesize
4KB

Download
memory/1680-120-0x00000000057F0000-0x00000000057F1000-memory.dmp

Filesize
4KB

Download
memory/1680-119-0x00000000055C0000-0x0000000005652000-memory.dmp

Filesize
584KB

Download
memory/1680-118-0x0000000005670000-0x0000000005671000-memory.dmp

Filesize
4KB

Download
memory/1680-117-0x0000000005B70000-0x0000000005B71000-memory.dmp

Filesize
4KB

Download
memory/2552-131-0x0000000000060000-0x0000000000061000-memory.dmp

Filesize
4KB

Download
memory/2552-133-0x000000001AC80000-0x000000001AC82000-memory.dmp

Filesize
8KB

Download

Analysis

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