stealc | 499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca

General

Target

499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe
Size

1.7MB
MD5

fade6c1f407b83d136fec862a0f93b25
SHA1

1766558368315c0ccedb685771a2f570c6af2f66
SHA256

499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca
SHA512

38330e0d7b0eaf693225096f37f94f4fd7ae7f32e70fddfc8d2a7b949c94a6fc328defbe38ed07275df50718e22356df5757d9bfed1c340137906ed4bad97239
SSDEEP

49152:IzEUSZV5t8jhbmd3GgFP/3snym0P5nXjAlu4T:IzEr3/GEtWyPP5w

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__	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.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	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.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-1-5-21-4050598569-1597076380-177084960-1000\Software\Wine	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.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
3524	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1744	3524	WerFault.exe	83

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	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.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	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3524	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe
3524	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe
3524	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe
3524	499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe

C:\Users\Admin\AppData\Local\Temp\499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.exe
"C:\Users\Admin\AppData\Local\Temp\499f55e7155e344a33f4227ac91f7f83ace22c3f3c17bd3c52b6366e0fd16aca.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:3524
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3524 -s 1472
  2⤵
  - Program crash
  PID:1744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3524 -ip 3524
1⤵
PID:1828

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/3524-0-0x0000000000C50000-0x00000000012F5000-memory.dmp

Filesize
6.6MB

Download
memory/3524-1-0x0000000077054000-0x0000000077056000-memory.dmp

Filesize
8KB

Download
memory/3524-2-0x0000000000C51000-0x0000000000C68000-memory.dmp

Filesize
92KB

Download
memory/3524-3-0x0000000000C50000-0x00000000012F5000-memory.dmp

Filesize
6.6MB

Download
memory/3524-4-0x0000000000C50000-0x00000000012F5000-memory.dmp

Filesize
6.6MB

Download
memory/3524-5-0x0000000000C50000-0x00000000012F5000-memory.dmp

Filesize
6.6MB

Download
memory/3524-6-0x0000000000C50000-0x00000000012F5000-memory.dmp

Filesize
6.6MB

Download
memory/3524-7-0x0000000000C50000-0x00000000012F5000-memory.dmp

Filesize
6.6MB

Download
memory/3524-8-0x0000000000C50000-0x00000000012F5000-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