stealc | b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7b

General

Target

b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe
Size

2.8MB
MD5

b28068b312d5325edd989df92fa6d7f0
SHA1

cf614aa659ee3d2929a8ac6a49348773d0d5efad
SHA256

b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7b
SHA512

ef0135fe7721ae9874dc3d79c3746ad4f9b3058b95e2b851fd4ce0ca08a091129916b45a532b5e7a2870ad54962aca6cab076ba287dc35803dc675f66068e8c7
SSDEEP

49152:YO4KgbNIC8phsfIkCCA4JlAxbX41M9nY+IWwE5x/c/YwU/:OKgbNIC8phsfJCCPlAO0fwEbEg5

Score

10^/10

stealc stok discovery evasion stealer

Malware Config

Extracted

Family

stealc

Botnet

stok

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__	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.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	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Wine	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.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
2368	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2616	2368	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	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.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	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2368	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe
2368	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2368 wrote to memory of 2616	2368	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe	32
PID 2368 wrote to memory of 2616	2368	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe	32
PID 2368 wrote to memory of 2616	2368	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe	32
PID 2368 wrote to memory of 2616	2368	b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe	32

C:\Users\Admin\AppData\Local\Temp\b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.exe
"C:\Users\Admin\AppData\Local\Temp\b11a88588a27f8453d7fec8a632776c1798beab8a73fd01c0f447d29a0086c7bN.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:2368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2368 -s 932
  2⤵
  - Program crash
  PID:2616

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/2368-0-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download
memory/2368-1-0x00000000779C0000-0x00000000779C2000-memory.dmp

Filesize
8KB

Download
memory/2368-2-0x0000000000B11000-0x0000000000B28000-memory.dmp

Filesize
92KB

Download
memory/2368-3-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download
memory/2368-4-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download
memory/2368-5-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download
memory/2368-6-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download
memory/2368-7-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download
memory/2368-8-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download
memory/2368-9-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download
memory/2368-10-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download
memory/2368-12-0x0000000000B10000-0x000000000100C000-memory.dmp

Filesize
5.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads