stealc | fa8380534c7876773e1315360225f92d30fc4ff6c4cdf70bebaf16e5f450d6f5

General

Target

file.exe
Size

1.7MB
MD5

c80d723528ed0121eef557cc31bd4c87
SHA1

150ec423edbfb73989a525fc3b553d06f411ece7
SHA256

fa8380534c7876773e1315360225f92d30fc4ff6c4cdf70bebaf16e5f450d6f5
SHA512

3ae11b656d242e891881b5833781a1431d0dde16de66a21b775613a7d02e098a68ad41301fa85f5cf3bd0bb7561c1ab784fd0d3c4940a45d66aa67f10b475da8
SSDEEP

49152:FeFnYVk0QSUFysYk0uyMIDv9fPFNC0c2c316Ph3qR:FAYVk0QSUFysb2MIRC0dh3qR

Score

10^/10

stealc mars discovery evasion stealer

Malware Config

Extracted

Family

stealc

Botnet

mars

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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	file.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	file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	file.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.

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	file.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
2604	file.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2220	2604	WerFault.exe	28

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2604	file.exe
2604	file.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2604 wrote to memory of 2220	2604	file.exe	30
PID 2604 wrote to memory of 2220	2604	file.exe	30
PID 2604 wrote to memory of 2220	2604	file.exe	30
PID 2604 wrote to memory of 2220	2604	file.exe	30

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.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:2604
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2604 -s 436
  2⤵
  - Program crash
  PID:2220

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/2604-0-0x00000000010E0000-0x0000000001768000-memory.dmp

Filesize
6.5MB

Download
memory/2604-1-0x0000000077460000-0x0000000077462000-memory.dmp

Filesize
8KB

Download
memory/2604-2-0x00000000010E1000-0x00000000010F8000-memory.dmp

Filesize
92KB

Download
memory/2604-3-0x00000000010E0000-0x0000000001768000-memory.dmp

Filesize
6.5MB

Download
memory/2604-4-0x00000000010E0000-0x0000000001768000-memory.dmp

Filesize
6.5MB

Download
memory/2604-5-0x00000000010E0000-0x0000000001768000-memory.dmp

Filesize
6.5MB

Download
memory/2604-6-0x00000000010E0000-0x0000000001768000-memory.dmp

Filesize
6.5MB

Download
memory/2604-7-0x00000000010E0000-0x0000000001768000-memory.dmp

Filesize
6.5MB

Download
memory/2604-8-0x00000000010E0000-0x0000000001768000-memory.dmp

Filesize
6.5MB

Download
memory/2604-9-0x00000000010E0000-0x0000000001768000-memory.dmp

Filesize
6.5MB

Download
memory/2604-10-0x00000000010E0000-0x0000000001768000-memory.dmp

Filesize
6.5MB

Download
memory/2604-12-0x00000000010E0000-0x0000000001768000-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