stealc | a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70

General

Target

a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe
Size

5.0MB
MD5

17d940e3012d0a3589f9dcb08cb8aacb
SHA1

c173fb724ed8484c8e369fa75fe55c583652ca0b
SHA256

a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70
SHA512

a3fd59b9b53b966401ba000a1fbe8eef6c964420bbc123bb32b525e8c5d34199f217c62e28c14a8a1b981688fc88dcf4c13cf03ee2e02da7aa5dfaeface93569
SSDEEP

98304:wYP8Zc0iQNurF33SihYA66Y2hiUgRR3qTWWSgjE:wYP8Zc0iQNurF3Iyg+W

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__	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.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	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Wine	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.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
1964	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2144	1964	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	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.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	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1964	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe
1964	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1964 wrote to memory of 2144	1964	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe	32
PID 1964 wrote to memory of 2144	1964	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe	32
PID 1964 wrote to memory of 2144	1964	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe	32
PID 1964 wrote to memory of 2144	1964	a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe	32

C:\Users\Admin\AppData\Local\Temp\a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.exe
"C:\Users\Admin\AppData\Local\Temp\a8bb33f2e7863a4f50af391645b42e1c401d58b91c017104215d222eef02ad70.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:1964
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1964 -s 892
  2⤵
  - Program crash
  PID:2144

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/1964-0-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-1-0x0000000076F50000-0x0000000076F52000-memory.dmp

Filesize
8KB

Download
memory/1964-2-0x0000000000B91000-0x0000000000DDA000-memory.dmp

Filesize
2.3MB

Download
memory/1964-3-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-4-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-5-0x0000000000B91000-0x0000000000DDA000-memory.dmp

Filesize
2.3MB

Download
memory/1964-6-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-7-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-8-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-9-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-10-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-11-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-12-0x0000000000B90000-0x0000000001094000-memory.dmp

Filesize
5.0MB

Download
memory/1964-13-0x0000000000B91000-0x0000000000DDA000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads