stealc | 44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883

General

Target

44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
Size

1.8MB
MD5

f07885b5720798735df239ba96a9788e
SHA1

eb9a21552b61d4be8dad2928945d72afa23e9262
SHA256

44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883
SHA512

d35e191e3425932a98f31f8ad191cc40865ced4ae486bb0fa0553afeca091837410bcdc6b8d0d744fb1ef639666f81464813134c56ce24cbfd441462adb4bf04
SSDEEP

49152:2wBA0FOqe0cDhapYdwdKXcurXEJIG5rgzIgt6At:NAsz2aZdKXcyXEJlkIort

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__	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.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	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.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-1-5-21-3227495264-2217614367-4027411560-1000\Software\Wine	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.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
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3656	3636	WerFault.exe	81

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	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.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	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
3636	44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe

C:\Users\Admin\AppData\Local\Temp\44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.exe
"C:\Users\Admin\AppData\Local\Temp\44c75b1c40dcc3acd0736908489e2ea02b93f5dba11fb1fb7847ad4d62b56883.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
PID:3636
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 1472
  2⤵
  - Program crash
  PID:3656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3636 -ip 3636
1⤵
PID:932

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/3636-0-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-1-0x00000000778E4000-0x00000000778E6000-memory.dmp

Filesize
8KB

Download
memory/3636-2-0x0000000000CC1000-0x0000000000CD8000-memory.dmp

Filesize
92KB

Download
memory/3636-3-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-4-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-5-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-6-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-7-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download
memory/3636-8-0x0000000000CC0000-0x0000000001388000-memory.dmp

Filesize
6.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads