blustealer | 31f20e519939289560661eb6fe04be9f73bbf17c3c22a9b8087c59e60bae8873

General

Target

56b6e17006b25ce5586d1441a2db7cc8.exe
Size

2.8MB
MD5

56b6e17006b25ce5586d1441a2db7cc8
SHA1

65163f385f5180a1dee189044d1df296af61ce70
SHA256

31f20e519939289560661eb6fe04be9f73bbf17c3c22a9b8087c59e60bae8873
SHA512

171fb597dcffe783024452460fad8e37af7fd87ab003674917085a468fddba9e1a9436d2a8b318420602705d44061153a8f18c79380a9df5f360f150af1d77f5

Score

10^/10

blustealer collection evasion stealer themida trojan

Malware Config

Extracted

Family

blustealer

C2

https://api.telegram.org/bot5449766717:AAHzRorvKI5URgvleGHlq6ZvqElY68-XL18/sendMessage?chat_id=1293496579

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__	56b6e17006b25ce5586d1441a2db7cc8.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	56b6e17006b25ce5586d1441a2db7cc8.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	56b6e17006b25ce5586d1441a2db7cc8.exe

Themida packer 4 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1364-55-0x0000000000400000-0x0000000000AB0000-memory.dmp	themida
behavioral1/memory/1364-56-0x0000000000400000-0x0000000000AB0000-memory.dmp	themida
behavioral1/memory/1364-60-0x0000000077100000-0x0000000077280000-memory.dmp	themida
behavioral1/memory/1364-71-0x0000000000400000-0x0000000000AB0000-memory.dmp	themida

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe
Key opened	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\Software\Microsoft\Office\16.0\Outlook\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	56b6e17006b25ce5586d1441a2db7cc8.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1364	56b6e17006b25ce5586d1441a2db7cc8.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1364 set thread context of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26

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
1364	56b6e17006b25ce5586d1441a2db7cc8.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1364 wrote to memory of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26
PID 1364 wrote to memory of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26
PID 1364 wrote to memory of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26
PID 1364 wrote to memory of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26
PID 1364 wrote to memory of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26
PID 1364 wrote to memory of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26
PID 1364 wrote to memory of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26
PID 1364 wrote to memory of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26
PID 1364 wrote to memory of 1724	1364	56b6e17006b25ce5586d1441a2db7cc8.exe	26

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-335065374-4263250628-1829373619-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	AppLaunch.exe

C:\Users\Admin\AppData\Local\Temp\56b6e17006b25ce5586d1441a2db7cc8.exe
"C:\Users\Admin\AppData\Local\Temp\56b6e17006b25ce5586d1441a2db7cc8.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:1364
- 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:1724

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/1364-71-0x0000000000400000-0x0000000000AB0000-memory.dmp

Filesize
6.7MB

Download
memory/1364-55-0x0000000000400000-0x0000000000AB0000-memory.dmp

Filesize
6.7MB

Download
memory/1364-56-0x0000000000400000-0x0000000000AB0000-memory.dmp

Filesize
6.7MB

Download
memory/1364-57-0x0000000000401000-0x000000000046C000-memory.dmp

Filesize
428KB

Download
memory/1364-60-0x0000000077100000-0x0000000077280000-memory.dmp

Filesize
1.5MB

Download
memory/1364-72-0x0000000077100000-0x0000000077280000-memory.dmp

Filesize
1.5MB

Download
memory/1364-54-0x0000000075681000-0x0000000075683000-memory.dmp

Filesize
8KB

Download
memory/1724-63-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1724-66-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1724-68-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download
memory/1724-70-0x0000000000D30000-0x0000000000DEC000-memory.dmp

Filesize
752KB

Download
memory/1724-61-0x0000000000090000-0x00000000000F6000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads