stealc | 5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f

General

Target

5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe
Size

1.7MB
MD5

cc2fb762ab17680d90294166e6ab21d3
SHA1

b05d3dacb8599d428cd62ae7086f471578176880
SHA256

5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f
SHA512

9651c005b4503892140b8d621d0a9bb5984e1de905aaf2d10d9448e293a023029ed1a9fa8f2a267bf0d1c24a58dbde107eb133da4003f95ce516003c149ece77
SSDEEP

49152:4PxBTWZa8KnuhwApJr1dYvo/GxY6uL/TV:Ixztnc4vo/7L

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__	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.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	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Wine	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.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
2256	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2836	2256	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	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.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	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2256	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe
2256	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2256 wrote to memory of 2836	2256	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe	32
PID 2256 wrote to memory of 2836	2256	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe	32
PID 2256 wrote to memory of 2836	2256	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe	32
PID 2256 wrote to memory of 2836	2256	5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe	32

C:\Users\Admin\AppData\Local\Temp\5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.exe
"C:\Users\Admin\AppData\Local\Temp\5a902220abc9b224b7d22c01cd841b5050f520acfdbcab8ce09242f99931085f.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:2256
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2256 -s 928
  2⤵
  - Program crash
  PID:2836

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/2256-0-0x0000000000D40000-0x00000000013E1000-memory.dmp

Filesize
6.6MB

Download
memory/2256-1-0x0000000077B10000-0x0000000077B12000-memory.dmp

Filesize
8KB

Download
memory/2256-2-0x0000000000D41000-0x0000000000D58000-memory.dmp

Filesize
92KB

Download
memory/2256-3-0x0000000000D40000-0x00000000013E1000-memory.dmp

Filesize
6.6MB

Download
memory/2256-4-0x0000000000D40000-0x00000000013E1000-memory.dmp

Filesize
6.6MB

Download
memory/2256-5-0x0000000000D40000-0x00000000013E1000-memory.dmp

Filesize
6.6MB

Download
memory/2256-6-0x0000000000D40000-0x00000000013E1000-memory.dmp

Filesize
6.6MB

Download
memory/2256-7-0x0000000000D40000-0x00000000013E1000-memory.dmp

Filesize
6.6MB

Download
memory/2256-8-0x0000000000D40000-0x00000000013E1000-memory.dmp

Filesize
6.6MB

Download
memory/2256-9-0x0000000000D40000-0x00000000013E1000-memory.dmp

Filesize
6.6MB

Download
memory/2256-10-0x0000000000D40000-0x00000000013E1000-memory.dmp

Filesize
6.6MB

Download
memory/2256-11-0x0000000000D40000-0x00000000013E1000-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