stealc | a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653

General

Target

a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe
Size

1.7MB
MD5

55e002eb9a97a1be5a9748701db9932b
SHA1

54b6633c1aaf0c7e7820be585afef96718a8417c
SHA256

a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653
SHA512

2f4f9388145fc47361ea4dbc9b8d5b6bf6822a1df64256bcecaf5712afc49f35ee4efe79be6786ed4b73b58d286911cf92726e6dd0c1be9322b965c7c78f7d12
SSDEEP

24576:wjkPQTnS09+2+uRdHTOSI8j9CkR3RRzmm6MFlSUcMO92Ukw/hDLhv9CNB:QTSc+2nRdzJR3RRzjTno2W/dLrC7

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__	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.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	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Wine	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.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
604	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2636	604	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	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.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	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
604	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe
604	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 604 wrote to memory of 2636	604	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe	32
PID 604 wrote to memory of 2636	604	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe	32
PID 604 wrote to memory of 2636	604	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe	32
PID 604 wrote to memory of 2636	604	a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe	32

C:\Users\Admin\AppData\Local\Temp\a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.exe
"C:\Users\Admin\AppData\Local\Temp\a7f1894be8e2976e21a6e6a087166df45421cbda98388457c3897c6574b86653.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:604
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 604 -s 940
  2⤵
  - Program crash
  PID:2636

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/604-0-0x0000000000C50000-0x00000000012D6000-memory.dmp

Filesize
6.5MB

Download
memory/604-1-0x0000000077410000-0x0000000077412000-memory.dmp

Filesize
8KB

Download
memory/604-2-0x0000000000C51000-0x0000000000C68000-memory.dmp

Filesize
92KB

Download
memory/604-3-0x0000000000C50000-0x00000000012D6000-memory.dmp

Filesize
6.5MB

Download
memory/604-4-0x0000000000C50000-0x00000000012D6000-memory.dmp

Filesize
6.5MB

Download
memory/604-5-0x0000000000C50000-0x00000000012D6000-memory.dmp

Filesize
6.5MB

Download
memory/604-6-0x0000000000C50000-0x00000000012D6000-memory.dmp

Filesize
6.5MB

Download
memory/604-7-0x0000000000C50000-0x00000000012D6000-memory.dmp

Filesize
6.5MB

Download
memory/604-8-0x0000000000C50000-0x00000000012D6000-memory.dmp

Filesize
6.5MB

Download
memory/604-9-0x0000000000C50000-0x00000000012D6000-memory.dmp

Filesize
6.5MB

Download
memory/604-10-0x0000000000C50000-0x00000000012D6000-memory.dmp

Filesize
6.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads