stealc | 1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456

General

Target

1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe
Size

1.7MB
MD5

78f93fd2c3ac6e822275d54d0d9c7730
SHA1

42db228f3b3d545a944913ea6d9bb83f16e932ee
SHA256

1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456
SHA512

0ba4c16e926cea7945053bee23bad6cea317735c8281cd3d8b79d73a58838e4977feaaba3543f2cc24f0ba88587852f88c5f1fea04a8736e1d6d81fc76fcdc0e
SSDEEP

49152:nJx1j9RIu7DBd9i3eoiTReDkzj0z8JDwNPpcuy:nJz9RB3R1TRtzj0tPp

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__	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.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\VideoBiosVersion	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Wine	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.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
2080	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2092	2080	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	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.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	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2080	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe
2080	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 2092	2080	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe	31
PID 2080 wrote to memory of 2092	2080	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe	31
PID 2080 wrote to memory of 2092	2080	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe	31
PID 2080 wrote to memory of 2092	2080	1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe	31

C:\Users\Admin\AppData\Local\Temp\1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.exe
"C:\Users\Admin\AppData\Local\Temp\1c5ef711f1627f5d24c27c67995235c9a1477e1907f8142b88acbd7bce728456N.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:2080
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2080 -s 924
  2⤵
  - Program crash
  PID:2092

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/2080-0-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download
memory/2080-1-0x0000000077130000-0x0000000077132000-memory.dmp

Filesize
8KB

Download
memory/2080-2-0x00000000011B1000-0x00000000011C8000-memory.dmp

Filesize
92KB

Download
memory/2080-3-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download
memory/2080-4-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download
memory/2080-5-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download
memory/2080-6-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download
memory/2080-7-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download
memory/2080-8-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download
memory/2080-9-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download
memory/2080-10-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download
memory/2080-11-0x00000000011B0000-0x000000000183A000-memory.dmp

Filesize
6.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads