stealc | a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc

General

Target

a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe
Size

1.7MB
MD5

b98080a07b23b0f8c4dcdc78c48d4e1c
SHA1

a46090f11b3b83194f48e37216c98e708f5a65f6
SHA256

a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc
SHA512

9c37f5f3d086253041d47fa7db13828b35c7217c1cb4290aaebfe6d150743efa9c0c2be7b7f5a59f9b473f7b3ff5e4de458c5bfa340590ce5b47832af6289dbc
SSDEEP

49152:FBJ7d9Q30oyboen7/pKfUPjAMfongB0z+WVNzV:XOI0Y7xwUPjAMwMADjzV

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__	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.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	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.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	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.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
2760	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2140	2760	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	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.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	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2760	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe
2760	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 2140	2760	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe	31
PID 2760 wrote to memory of 2140	2760	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe	31
PID 2760 wrote to memory of 2140	2760	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe	31
PID 2760 wrote to memory of 2140	2760	a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe	31

C:\Users\Admin\AppData\Local\Temp\a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.exe
"C:\Users\Admin\AppData\Local\Temp\a3f4b5c2cf7f1a01cafdb03c4866ba7b83c54a9dfb8fd0cca161cf610630c2bc.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:2760
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2760 -s 436
  2⤵
  - Program crash
  PID:2140

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/2760-0-0x0000000000860000-0x0000000000EF2000-memory.dmp

Filesize
6.6MB

Download
memory/2760-1-0x0000000077E60000-0x0000000077E62000-memory.dmp

Filesize
8KB

Download
memory/2760-2-0x0000000000861000-0x0000000000878000-memory.dmp

Filesize
92KB

Download
memory/2760-3-0x0000000000860000-0x0000000000EF2000-memory.dmp

Filesize
6.6MB

Download
memory/2760-4-0x0000000000860000-0x0000000000EF2000-memory.dmp

Filesize
6.6MB

Download
memory/2760-6-0x0000000000860000-0x0000000000EF2000-memory.dmp

Filesize
6.6MB

Download
memory/2760-7-0x0000000000860000-0x0000000000EF2000-memory.dmp

Filesize
6.6MB

Download
memory/2760-8-0x0000000000860000-0x0000000000EF2000-memory.dmp

Filesize
6.6MB

Download
memory/2760-9-0x0000000000860000-0x0000000000EF2000-memory.dmp

Filesize
6.6MB

Download
memory/2760-10-0x0000000000860000-0x0000000000EF2000-memory.dmp

Filesize
6.6MB

Download
memory/2760-11-0x0000000000860000-0x0000000000EF2000-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