stealc | 388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671

General

Target

388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe
Size

1.7MB
MD5

84049fe4ab25fb0923601e05bed44a91
SHA1

daf9abeafdedf99cc37f66770755d8194ebf8430
SHA256

388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671
SHA512

fb778766a657defb10bd87732b20c8c9d9df0f989944a53a5c90d9c53d195dc5ef0cb81956db353f9d1e2dcda5202465179aafed9c9b3bd4b8aa6fcbc29dfd92
SSDEEP

49152:196Lcel0LGW9gK62SaGTnfw4wy7HtMsOJD1jZWpRWPHv:196vhVKNGTnfSsOFNZT

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__	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.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	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.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-1-5-21-2039016743-699959520-214465309-1000\Software\Wine	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.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
2440	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2800	2440	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	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.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	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2440	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe
2440	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 2800	2440	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe	32
PID 2440 wrote to memory of 2800	2440	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe	32
PID 2440 wrote to memory of 2800	2440	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe	32
PID 2440 wrote to memory of 2800	2440	388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe	32

C:\Users\Admin\AppData\Local\Temp\388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.exe
"C:\Users\Admin\AppData\Local\Temp\388aa44529986a78185d3c0960729d476c93b5d353c1a01ef5ab259bd5005671.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:2440
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2440 -s 928
  2⤵
  - Program crash
  PID:2800

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/2440-0-0x0000000000330000-0x00000000009D3000-memory.dmp

Filesize
6.6MB

Download
memory/2440-1-0x0000000077C30000-0x0000000077C32000-memory.dmp

Filesize
8KB

Download
memory/2440-2-0x0000000000331000-0x0000000000348000-memory.dmp

Filesize
92KB

Download
memory/2440-3-0x0000000000330000-0x00000000009D3000-memory.dmp

Filesize
6.6MB

Download
memory/2440-4-0x0000000000330000-0x00000000009D3000-memory.dmp

Filesize
6.6MB

Download
memory/2440-5-0x0000000000330000-0x00000000009D3000-memory.dmp

Filesize
6.6MB

Download
memory/2440-6-0x0000000000330000-0x00000000009D3000-memory.dmp

Filesize
6.6MB

Download
memory/2440-7-0x0000000000330000-0x00000000009D3000-memory.dmp

Filesize
6.6MB

Download
memory/2440-8-0x0000000000330000-0x00000000009D3000-memory.dmp

Filesize
6.6MB

Download
memory/2440-9-0x0000000000330000-0x00000000009D3000-memory.dmp

Filesize
6.6MB

Download
memory/2440-10-0x0000000000330000-0x00000000009D3000-memory.dmp

Filesize
6.6MB

Download
memory/2440-11-0x0000000000330000-0x00000000009D3000-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