stealc | 59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3

General

Target

59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe
Size

1.7MB
MD5

7055b335d750376e2fe29a4a5445fac1
SHA1

f49c34d963b326168cea91e79b138a79fbb7974b
SHA256

59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3
SHA512

3b338efa359814e4bb1285a86bb965ceb4f9b8068a0247bc4e89a6352052e0c9f4d46e1cf29e0692652a0b8fd98bdf618f878deebcb9d8d0fe96e346568c2681
SSDEEP

24576:CAPigEsBWbT2W4nYDe9JmiKSUrvjCYKrEL7lz+dkRalY0qQAdMC:CANrBWmVnYC3miKScRKrSlzI21QAd

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__	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.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	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.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-1-5-21-1488793075-819845221-1497111674-1000\Software\Wine	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.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
2244	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2020	2244	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	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.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	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2244	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe
2244	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 2020	2244	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe	31
PID 2244 wrote to memory of 2020	2244	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe	31
PID 2244 wrote to memory of 2020	2244	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe	31
PID 2244 wrote to memory of 2020	2244	59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe	31

C:\Users\Admin\AppData\Local\Temp\59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.exe
"C:\Users\Admin\AppData\Local\Temp\59115436fd88ec202e7e6db71fb455ca1c54b6875f44f292af79d096745e70f3.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:2244
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2244 -s 928
  2⤵
  - Program crash
  PID:2020

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

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Downloads

memory/2244-0-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download
memory/2244-1-0x00000000777D0000-0x00000000777D2000-memory.dmp

Filesize
8KB

Download
memory/2244-2-0x0000000000FF1000-0x0000000001008000-memory.dmp

Filesize
92KB

Download
memory/2244-3-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download
memory/2244-4-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download
memory/2244-5-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download
memory/2244-6-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download
memory/2244-7-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download
memory/2244-8-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download
memory/2244-9-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download
memory/2244-10-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download
memory/2244-12-0x0000000000FF0000-0x000000000168B000-memory.dmp

Filesize
6.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads