stealc | f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951

General

Target

f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe
Size

1.7MB
MD5

e1d8b18576d532f367b4cc5dfcfe56eb
SHA1

908aa18a894891cb709e2603a97a3687018e973e
SHA256

f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951
SHA512

c00e9ff4be4bb6a38cb53ff7689d3c9d16b7225c94fd4cc07f84b550aa965fcf4a571022902830c8623436f8b41cc642161ea79fbf132dae1ccf4ae0c8ddac10
SSDEEP

49152:WhNZ1UXIZO/HftPDUpCtLFE88zMZujVnGJ4L:htLhLFENzM4jNGJ4L

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__	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.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	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.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-1-5-21-1045960512-3948844814-3059691613-1000\Software\Wine	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.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
4736	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1168	4736	WerFault.exe	82

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	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.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	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4736	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe
4736	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe
4736	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe
4736	f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe

C:\Users\Admin\AppData\Local\Temp\f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.exe
"C:\Users\Admin\AppData\Local\Temp\f9d42426976b8a1e404b713b0617e031602c7e0e1ad37e4815c407358f9bb951.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
PID:4736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4736 -s 1472
  2⤵
  - Program crash
  PID:1168

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4736 -ip 4736
1⤵
PID:1900

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/4736-0-0x0000000000A30000-0x00000000010C7000-memory.dmp

Filesize
6.6MB

Download
memory/4736-1-0x00000000772F4000-0x00000000772F6000-memory.dmp

Filesize
8KB

Download
memory/4736-2-0x0000000000A31000-0x0000000000A48000-memory.dmp

Filesize
92KB

Download
memory/4736-3-0x0000000000A30000-0x00000000010C7000-memory.dmp

Filesize
6.6MB

Download
memory/4736-4-0x0000000000A30000-0x00000000010C7000-memory.dmp

Filesize
6.6MB

Download
memory/4736-5-0x0000000000A30000-0x00000000010C7000-memory.dmp

Filesize
6.6MB

Download
memory/4736-6-0x0000000000A30000-0x00000000010C7000-memory.dmp

Filesize
6.6MB

Download
memory/4736-7-0x0000000000A30000-0x00000000010C7000-memory.dmp

Filesize
6.6MB

Download
memory/4736-8-0x0000000000A30000-0x00000000010C7000-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