stealc | 4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a

General

Target

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe
Size

2.0MB
MD5

264daa04defc6b3cb7cd8b682db05acd
SHA1

10f55121d698817f1960530cbec2bd1da8564a8d
SHA256

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a
SHA512

d994b1e7db132e7cff596e977badcd5a57ca28c81360d6a5452bce1b66f6d0358a029555f5612fb8363ded8d6ca37e8e96cd43a89e45e1ed4dbef8f112c8159f
SSDEEP

49152:bor8zruyLK/n+IzUoAeFBe2L0eN0xvVswI2fwhE+tLs+coR0qGPJ:8yO+IzUsBtL0HVs7rtY+coR0qGPJ

Score

10^/10

stealc tale credential_access discovery evasion spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

tale

C2

http://185.215.113.206

Attributes

url_path
/6c4adf523b719729.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

Processes:

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ 4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.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

Processes:

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

2852 cmd.exe

pid	process
2852	cmd.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

Processes:

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Wine	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

Loads dropped DLL 1 IoCs

Processes:

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

pid process

2208 4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001
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

Processes:

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

pid process

2208 4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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

Processes:

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.execmd.exetimeout.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.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

Processes:

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2672 timeout.exe

pid	process
2672	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

pid	process
2208	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe
2208	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.execmd.exe

description	pid	process	target process
PID 2208 wrote to memory of 2852	2208	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe	cmd.exe
PID 2208 wrote to memory of 2852	2208	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe	cmd.exe
PID 2208 wrote to memory of 2852	2208	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe	cmd.exe
PID 2208 wrote to memory of 2852	2208	4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe	cmd.exe
PID 2852 wrote to memory of 2672	2852	cmd.exe	timeout.exe
PID 2852 wrote to memory of 2672	2852	cmd.exe	timeout.exe
PID 2852 wrote to memory of 2672	2852	cmd.exe	timeout.exe
PID 2852 wrote to memory of 2672	2852	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe
"C:\Users\Admin\AppData\Local\Temp\4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\4a39c54963c15bf5b9388247e2a83ca5bbb1b69ca3e016ad75c8cea50a99a43a.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2852
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

5

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

\ProgramData\chrome.dll

Filesize
676KB

MD5
eda18948a989176f4eebb175ce806255

SHA1
ff22a3d5f5fb705137f233c36622c79eab995897

SHA256
81a4f37c5495800b7cc46aea6535d9180dadb5c151db6f1fd1968d1cd8c1eeb4

SHA512
160ed9990c37a4753fc0f5111c94414568654afbedc05308308197df2a99594f2d5d8fe511fd2279543a869ed20248e603d88a0b9b8fb119e8e6131b0c52ff85

Download Submit
memory/2208-0-0x00000000010F0000-0x000000000181D000-memory.dmp

Filesize
7.2MB

Download
memory/2208-1-0x00000000777D0000-0x00000000777D2000-memory.dmp

Filesize
8KB

Download
memory/2208-2-0x00000000010F1000-0x0000000001159000-memory.dmp

Filesize
416KB

Download
memory/2208-3-0x00000000010F0000-0x000000000181D000-memory.dmp

Filesize
7.2MB

Download
memory/2208-7-0x00000000010F0000-0x000000000181D000-memory.dmp

Filesize
7.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads