stealc | 4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c

General

Target

4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe
Size

1.7MB
MD5

1f8c1aad2738a582d7b549ced4b647ea
SHA1

073bd80fb416fe7cc74244798a0f323dc3907ce5
SHA256

4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c
SHA512

86cf0c9a3f6133595d3da54abd76a5f46b25d46d1f5d767b2e9f4b081a4e3af36664cf85ca9de49c6dfcf12e2a89d1ebd57e3526bec27949faf972d17733ffc7
SSDEEP

24576:WBpBJtgs4t5+Il89I+mQrC2QAJ+lNDHilLvqJghGg8gH7KRSirZHzUcndgDyF4nk:WRJWs6SmYaA7AG78KwhrWcnAyF4HfG5

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__	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.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	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Wine	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.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
2756	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2796	2756	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	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2756	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe
2756	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 2796	2756	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe	32
PID 2756 wrote to memory of 2796	2756	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe	32
PID 2756 wrote to memory of 2796	2756	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe	32
PID 2756 wrote to memory of 2796	2756	4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe	32

C:\Users\Admin\AppData\Local\Temp\4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.exe
"C:\Users\Admin\AppData\Local\Temp\4a646bae75d97282a043aa8fc8837ceb407c947c7abeb83c8f2f12dba1a7017c.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:2756
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2756 -s 928
  2⤵
  - Program crash
  PID:2796

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/2756-0-0x0000000000FD0000-0x0000000001659000-memory.dmp

Filesize
6.5MB

Download
memory/2756-1-0x0000000076F30000-0x0000000076F32000-memory.dmp

Filesize
8KB

Download
memory/2756-2-0x0000000000FD1000-0x0000000000FE8000-memory.dmp

Filesize
92KB

Download
memory/2756-3-0x0000000000FD0000-0x0000000001659000-memory.dmp

Filesize
6.5MB

Download
memory/2756-4-0x0000000000FD0000-0x0000000001659000-memory.dmp

Filesize
6.5MB

Download
memory/2756-5-0x0000000000FD0000-0x0000000001659000-memory.dmp

Filesize
6.5MB

Download
memory/2756-6-0x0000000000FD0000-0x0000000001659000-memory.dmp

Filesize
6.5MB

Download
memory/2756-7-0x0000000000FD0000-0x0000000001659000-memory.dmp

Filesize
6.5MB

Download
memory/2756-8-0x0000000000FD0000-0x0000000001659000-memory.dmp

Filesize
6.5MB

Download
memory/2756-9-0x0000000000FD0000-0x0000000001659000-memory.dmp

Filesize
6.5MB

Download
memory/2756-10-0x0000000000FD0000-0x0000000001659000-memory.dmp

Filesize
6.5MB

Download
memory/2756-11-0x0000000000FD0000-0x0000000001659000-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