stealc | 39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a

General

Target

39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe
Size

1.7MB
MD5

705242947c668181ba1d00b7b6d25164
SHA1

cc46529fdcf545a625c6a434e58747eb67cc3fb0
SHA256

39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a
SHA512

b581b0e95a259022aa4fdd88152353d461f0a95ba4cc5cdda564ae3d2b3b3e2ac7c50e698a5369359dc3c02e0d3fb14820ee87cfcd56c8a70a7da5145b94db1c
SSDEEP

49152:g8Z8ZqEL32zxEju3C3CIQWEmZrbQRuel/xG:gxqYfu3bME5G

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__	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.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	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Wine	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.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
1236	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2448	1236	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	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.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	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1236	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe
1236	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1236 wrote to memory of 2448	1236	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe	31
PID 1236 wrote to memory of 2448	1236	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe	31
PID 1236 wrote to memory of 2448	1236	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe	31
PID 1236 wrote to memory of 2448	1236	39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe	31

C:\Users\Admin\AppData\Local\Temp\39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.exe
"C:\Users\Admin\AppData\Local\Temp\39a99fd12bcaa5df8f3e0a494c87d72336c33c4f07686e3d5f7199b1b6de1c8a.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:1236
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1236 -s 432
  2⤵
  - Program crash
  PID:2448

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/1236-0-0x00000000000F0000-0x0000000000788000-memory.dmp

Filesize
6.6MB

Download
memory/1236-1-0x00000000773A0000-0x00000000773A2000-memory.dmp

Filesize
8KB

Download
memory/1236-2-0x00000000000F1000-0x0000000000108000-memory.dmp

Filesize
92KB

Download
memory/1236-3-0x00000000000F0000-0x0000000000788000-memory.dmp

Filesize
6.6MB

Download
memory/1236-4-0x00000000000F0000-0x0000000000788000-memory.dmp

Filesize
6.6MB

Download
memory/1236-5-0x00000000000F0000-0x0000000000788000-memory.dmp

Filesize
6.6MB

Download
memory/1236-6-0x00000000000F0000-0x0000000000788000-memory.dmp

Filesize
6.6MB

Download
memory/1236-7-0x00000000000F0000-0x0000000000788000-memory.dmp

Filesize
6.6MB

Download
memory/1236-8-0x00000000000F0000-0x0000000000788000-memory.dmp

Filesize
6.6MB

Download
memory/1236-9-0x00000000000F0000-0x0000000000788000-memory.dmp

Filesize
6.6MB

Download
memory/1236-10-0x00000000000F0000-0x0000000000788000-memory.dmp

Filesize
6.6MB

Download
memory/1236-11-0x00000000000F0000-0x0000000000788000-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