blustealer | 4edfbba77374d0a3d2a422b91fe68b169b714e18f0574f8a2480db5ef60133af

General

Target

49b3b273bcde3ffa77230bca6036ddd1.exe
Size

2.8MB
MD5

49b3b273bcde3ffa77230bca6036ddd1
SHA1

e25fdf251f5ac4ffad2836ddcfbbd9efb5a1adba
SHA256

4edfbba77374d0a3d2a422b91fe68b169b714e18f0574f8a2480db5ef60133af
SHA512

f47eedfa329214a35f79da74334937c849071e8843ce551a63eab391dc0982424df94e2d881b1c7e5cba70b65c1aa8bc67a8278ce23e95c716654b84dd3cd3cb
SSDEEP

49152:7OJGLUpIRkdAI0B4VQZ3vZdhYwb8ixoQsoyx8Unug+QPZ7/g5PMYD3lE+TjhARFF:7SGbGdAQV4R0wizugbdgLD3DhARFwm

Score

10^/10

blustealer collection evasion stealer themida trojan

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5351997584:AAEyh4aj9rNp8tJtHYZqoYG-PSzq-z5M18M/sendMessage?chat_id=1374455932

Signatures

BluStealer
A Modular information stealer written in Visual Basic.
stealer blustealer

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	49b3b273bcde3ffa77230bca6036ddd1.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	49b3b273bcde3ffa77230bca6036ddd1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	49b3b273bcde3ffa77230bca6036ddd1.exe

Themida packer 3 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/2976-132-0x0000000000400000-0x0000000000AC1000-memory.dmp	themida
behavioral2/memory/2976-133-0x0000000000400000-0x0000000000AC1000-memory.dmp	themida
behavioral2/memory/2976-138-0x0000000000400000-0x0000000000AC1000-memory.dmp	themida

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	49b3b273bcde3ffa77230bca6036ddd1.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2976	49b3b273bcde3ffa77230bca6036ddd1.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2976 set thread context of 2364	2976	49b3b273bcde3ffa77230bca6036ddd1.exe	96

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

System Information Discovery
T1082

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	38	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2976	49b3b273bcde3ffa77230bca6036ddd1.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 2364	2976	49b3b273bcde3ffa77230bca6036ddd1.exe	96
PID 2976 wrote to memory of 2364	2976	49b3b273bcde3ffa77230bca6036ddd1.exe	96
PID 2976 wrote to memory of 2364	2976	49b3b273bcde3ffa77230bca6036ddd1.exe	96
PID 2976 wrote to memory of 2364	2976	49b3b273bcde3ffa77230bca6036ddd1.exe	96
PID 2976 wrote to memory of 2364	2976	49b3b273bcde3ffa77230bca6036ddd1.exe	96

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\49b3b273bcde3ffa77230bca6036ddd1.exe
"C:\Users\Admin\AppData\Local\Temp\49b3b273bcde3ffa77230bca6036ddd1.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2976
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - outlook_office_path
  - outlook_win_path
  PID:2364

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/2364-141-0x0000000000700000-0x0000000000766000-memory.dmp

Filesize
408KB

Download
memory/2364-142-0x0000000004E90000-0x0000000004F2C000-memory.dmp

Filesize
624KB

Download
memory/2976-132-0x0000000000400000-0x0000000000AC1000-memory.dmp

Filesize
6.8MB

Download
memory/2976-133-0x0000000000400000-0x0000000000AC1000-memory.dmp

Filesize
6.8MB

Download
memory/2976-134-0x0000000000401000-0x000000000046B000-memory.dmp

Filesize
424KB

Download
memory/2976-135-0x0000000077370000-0x0000000077513000-memory.dmp

Filesize
1.6MB

Download
memory/2976-138-0x0000000000400000-0x0000000000AC1000-memory.dmp

Filesize
6.8MB

Download
memory/2976-139-0x0000000077370000-0x0000000077513000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads