stealc | 5ffbfc038a1ab3b850f1afd6b5283501875bb98ee5f9541ed6edf706d2891f6f

General

Target

random.exe
Size

1.7MB
MD5

7fa381cd8c80e6930f9ead27ab8d65d5
SHA1

9478be51941ba8077be76c75a6180e5468ba90aa
SHA256

5ffbfc038a1ab3b850f1afd6b5283501875bb98ee5f9541ed6edf706d2891f6f
SHA512

60c9d72fe393d846015585ab078c33211e1755071ea465a645ee2e80b48a392258f3b492161e92685e26f82c3848c2c1097a280b3fb0edcd5d78b4e4db30b523
SSDEEP

49152:aG2fPSWTmRNDe5VobzkU+v5OLY0GgP+H7OvR6O:92XSWTX5VoEUI5Ok0xO65

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__	random.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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	random.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Wine	random.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
1116	random.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2464	1116	WerFault.exe	30

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	random.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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	random.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1116	random.exe
1116	random.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1116 wrote to memory of 2464	1116	random.exe	32
PID 1116 wrote to memory of 2464	1116	random.exe	32
PID 1116 wrote to memory of 2464	1116	random.exe	32
PID 1116 wrote to memory of 2464	1116	random.exe	32

C:\Users\Admin\AppData\Local\Temp\random.exe
"C:\Users\Admin\AppData\Local\Temp\random.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:1116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1116 -s 432
  2⤵
  - Program crash
  PID:2464

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/1116-0-0x0000000001130000-0x00000000017B8000-memory.dmp

Filesize
6.5MB

Download
memory/1116-1-0x0000000077460000-0x0000000077462000-memory.dmp

Filesize
8KB

Download
memory/1116-2-0x0000000001131000-0x0000000001148000-memory.dmp

Filesize
92KB

Download
memory/1116-3-0x0000000001130000-0x00000000017B8000-memory.dmp

Filesize
6.5MB

Download
memory/1116-4-0x0000000001130000-0x00000000017B8000-memory.dmp

Filesize
6.5MB

Download
memory/1116-5-0x0000000001130000-0x00000000017B8000-memory.dmp

Filesize
6.5MB

Download
memory/1116-6-0x0000000001130000-0x00000000017B8000-memory.dmp

Filesize
6.5MB

Download
memory/1116-7-0x0000000001130000-0x00000000017B8000-memory.dmp

Filesize
6.5MB

Download
memory/1116-8-0x0000000001130000-0x00000000017B8000-memory.dmp

Filesize
6.5MB

Download
memory/1116-9-0x0000000001130000-0x00000000017B8000-memory.dmp

Filesize
6.5MB

Download
memory/1116-10-0x0000000001130000-0x00000000017B8000-memory.dmp

Filesize
6.5MB

Download
memory/1116-11-0x0000000001130000-0x00000000017B8000-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