stealc | 292eda049137573fc8b923ef58da8218eb5cfab29010e459ba6963434fa1cf7c

General

Target

random.exe
Size

1.8MB
MD5

f930046acafd7c97c30231b17b5d053a
SHA1

d442f54bf5d1b61457442a2c110da594dc7825ec
SHA256

292eda049137573fc8b923ef58da8218eb5cfab29010e459ba6963434fa1cf7c
SHA512

1f96c0b414b39d20264465274dda554b47c6fc32e32468db30d2d4a37efc60bd50184c7d0afc482218f2f6f5de6678958038e581f5e1afbf9324cff7ea98ce2e
SSDEEP

24576:rq7KQueAo6rwtCqKGMZaT2Llz2/+9xoWiyOi4F14Mp2f20RQm7QQlZ6sZswi38y:GEIobASlz4ZMOt/QQQl7Z

Score

10^/10

stealc brat discovery evasion 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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Wine	random.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
3056	random.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1476	3056	WerFault.exe	29

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	random.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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	random.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3056	random.exe
3056	random.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 1476	3056	random.exe	31
PID 3056 wrote to memory of 1476	3056	random.exe	31
PID 3056 wrote to memory of 1476	3056	random.exe	31
PID 3056 wrote to memory of 1476	3056	random.exe	31

C:\Users\Admin\AppData\Local\Temp\random.exe
"C:\Users\Admin\AppData\Local\Temp\random.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:3056
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3056 -s 432
  2⤵
  - Program crash
  PID:1476

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/3056-0-0x0000000000FE0000-0x0000000001690000-memory.dmp

Filesize
6.7MB

Download
memory/3056-1-0x0000000077AB0000-0x0000000077AB2000-memory.dmp

Filesize
8KB

Download
memory/3056-2-0x0000000000FE1000-0x0000000000FF8000-memory.dmp

Filesize
92KB

Download
memory/3056-3-0x0000000000FE0000-0x0000000001690000-memory.dmp

Filesize
6.7MB

Download
memory/3056-4-0x0000000000FE0000-0x0000000001690000-memory.dmp

Filesize
6.7MB

Download
memory/3056-5-0x0000000000FE0000-0x0000000001690000-memory.dmp

Filesize
6.7MB

Download
memory/3056-7-0x0000000000FE0000-0x0000000001690000-memory.dmp

Filesize
6.7MB

Download
memory/3056-8-0x0000000000FE0000-0x0000000001690000-memory.dmp

Filesize
6.7MB

Download
memory/3056-9-0x0000000000FE0000-0x0000000001690000-memory.dmp

Filesize
6.7MB

Download
memory/3056-10-0x0000000000FE0000-0x0000000001690000-memory.dmp

Filesize
6.7MB

Download
memory/3056-12-0x0000000000FE0000-0x0000000001690000-memory.dmp

Filesize
6.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads