stealc | 5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749

General

Target

5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe
Size

1.7MB
MD5

7538a756f342b19f688b414c0b56db33
SHA1

5638800f3b28e0de7a9b6f74ed44df3e5c7a4d3f
SHA256

5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749
SHA512

46d9fa1fa2f006f36baac878bb376a183179c1ac25811fb60d8fabcfb5b3cde63618514b9d91308a04f046f6645c83b0590860b9a844706cc66a19ffb41cff09
SSDEEP

49152:xHcuKPGHy8OJGLJumn11LC5qiHy1thVjzFHXA:ONP0/6GLJumn1pe6Njz9XA

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__	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.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	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.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-1-5-21-3756129449-3121373848-4276368241-1000\Software\Wine	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.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
540	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4504	540	WerFault.exe	81

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	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
540	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe
540	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe
540	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe
540	5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe

C:\Users\Admin\AppData\Local\Temp\5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.exe
"C:\Users\Admin\AppData\Local\Temp\5b2141890ab82f49ede79a9b094c31f004c5ed51b3c4b3768afde76d3c595749.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:540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 540 -s 1480
  2⤵
  - Program crash
  PID:4504

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 540 -ip 540
1⤵
PID:4952

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/540-0-0x0000000000840000-0x0000000000EDB000-memory.dmp

Filesize
6.6MB

Download
memory/540-1-0x0000000077834000-0x0000000077836000-memory.dmp

Filesize
8KB

Download
memory/540-2-0x0000000000841000-0x0000000000858000-memory.dmp

Filesize
92KB

Download
memory/540-3-0x0000000000840000-0x0000000000EDB000-memory.dmp

Filesize
6.6MB

Download
memory/540-4-0x0000000000840000-0x0000000000EDB000-memory.dmp

Filesize
6.6MB

Download
memory/540-5-0x0000000000840000-0x0000000000EDB000-memory.dmp

Filesize
6.6MB

Download
memory/540-6-0x0000000000840000-0x0000000000EDB000-memory.dmp

Filesize
6.6MB

Download
memory/540-7-0x0000000000840000-0x0000000000EDB000-memory.dmp

Filesize
6.6MB

Download
memory/540-8-0x0000000000840000-0x0000000000EDB000-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