stealc | 2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55

General

Target

2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe
Size

1.7MB
MD5

666ce401dd48e4d82d25b242a42de9fb
SHA1

330cc108c558e92e900cea4901ecd5980a218ad7
SHA256

2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55
SHA512

441a8306fcc830f8b42380781dd9cfbe2f70812432500ad4045112d21bbf9bf7643f326636870c1f783c27b23d90fcb08ca71a728fceb5a43ee6e020015f016c
SSDEEP

49152:G3jhTT+VB/XrWxjjCnG7iywihC6mMPsZi:G3dGVB/7QKGDwWCVMkZ

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__	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.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	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Wine	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.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
2780	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2896	2780	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	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.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	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2780	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe
2780	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 2896	2780	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe	31
PID 2780 wrote to memory of 2896	2780	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe	31
PID 2780 wrote to memory of 2896	2780	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe	31
PID 2780 wrote to memory of 2896	2780	2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe	31

C:\Users\Admin\AppData\Local\Temp\2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.exe
"C:\Users\Admin\AppData\Local\Temp\2bf7db42ce36a0ad85cf6b1e493e893e15afc1b9c3110c587b01bb07430faa55.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:2780
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2780 -s 928
  2⤵
  - Program crash
  PID:2896

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/2780-0-0x0000000000870000-0x0000000000F0B000-memory.dmp

Filesize
6.6MB

Download
memory/2780-1-0x00000000774B0000-0x00000000774B2000-memory.dmp

Filesize
8KB

Download
memory/2780-2-0x0000000000871000-0x0000000000888000-memory.dmp

Filesize
92KB

Download
memory/2780-3-0x0000000000870000-0x0000000000F0B000-memory.dmp

Filesize
6.6MB

Download
memory/2780-4-0x0000000000870000-0x0000000000F0B000-memory.dmp

Filesize
6.6MB

Download
memory/2780-5-0x0000000000870000-0x0000000000F0B000-memory.dmp

Filesize
6.6MB

Download
memory/2780-6-0x0000000000870000-0x0000000000F0B000-memory.dmp

Filesize
6.6MB

Download
memory/2780-7-0x0000000000870000-0x0000000000F0B000-memory.dmp

Filesize
6.6MB

Download
memory/2780-8-0x0000000000870000-0x0000000000F0B000-memory.dmp

Filesize
6.6MB

Download
memory/2780-9-0x0000000000870000-0x0000000000F0B000-memory.dmp

Filesize
6.6MB

Download
memory/2780-10-0x0000000000870000-0x0000000000F0B000-memory.dmp

Filesize
6.6MB

Download
memory/2780-11-0x0000000000870000-0x0000000000F0B000-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