stealc | 9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2

General

Target

9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe
Size

1.7MB
MD5

68ebb4f43096829cf16d1c92626e83f6
SHA1

4333ae8ea93cb22605f0d382fd0ded99d39a37e9
SHA256

9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2
SHA512

d4f82dda5f4281a628280f98b3305129467f63807b585ce95d7e6318632bb2a529e44a76e2be6f9ef91a742b30ae322bf273bf3b0faf607b344bf3ba8b2e86d9
SSDEEP

49152:Tbna4zxaCqv+TY7YY4JDnUbvTd+LXZ1jeT/+4OR:Tba4zJY4JDUDJcGQ

Score

10^/10

stealc brat defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

brat

C2

http://185.215.113.206

Attributes

url_path
/c4becf79229cb002.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Stealc family
stealc

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

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.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\VideoBiosVersion	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Wine	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1404	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2736	1404	WerFault.exe	30

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1404	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe
1404	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 2736	1404	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe	32
PID 1404 wrote to memory of 2736	1404	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe	32
PID 1404 wrote to memory of 2736	1404	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe	32
PID 1404 wrote to memory of 2736	1404	9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe	32

C:\Users\Admin\AppData\Local\Temp\9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe
"C:\Users\Admin\AppData\Local\Temp\9b99f78feae13b68c17dcae9f101e986a94b83f2f6685993d120f9e8c82051f2.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1404 -s 924
  2⤵
  - Program crash
  PID:2736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

5

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1404-0-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download
memory/1404-1-0x0000000077C00000-0x0000000077C02000-memory.dmp

Filesize
8KB

Download
memory/1404-2-0x0000000000061000-0x0000000000078000-memory.dmp

Filesize
92KB

Download
memory/1404-3-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download
memory/1404-4-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download
memory/1404-5-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download
memory/1404-6-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download
memory/1404-7-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download
memory/1404-8-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download
memory/1404-9-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download
memory/1404-10-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download
memory/1404-11-0x0000000000060000-0x00000000006FD000-memory.dmp

Filesize
6.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads