stealc | a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084

General

Target

a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe
Size

4.9MB
MD5

d5a904636ca527356840debb15e12200
SHA1

c0a8c50bf234f60ab91eff3fb0550e8dac2ec00a
SHA256

a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084
SHA512

f161813163fca2ca4662f2d0dc6441935e7250a7dad557256b026dd611edd45fa427776e7f714f74f6082a323ee78eb618b9c0f805fa17dd85dab379da2c647b
SSDEEP

49152:VLR9WrXBewnMEWy1lQBbG4vxbMeTtB50if:/9oXswnMEL1lKbPxbzyi

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__	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.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	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.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-1-5-21-2878641211-696417878-3864914810-1000\Software\Wine	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.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
2476	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1392	2476	WerFault.exe	84

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	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.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	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2476	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe
2476	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe
2476	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe
2476	a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe

C:\Users\Admin\AppData\Local\Temp\a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.exe
"C:\Users\Admin\AppData\Local\Temp\a5b3a9434efac3d96897a62839ba5b7fd1f3446c33403807248dfef9017d2084.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:2476
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2476 -s 1476
  2⤵
  - Program crash
  PID:1392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2476 -ip 2476
1⤵
PID:4968

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/2476-0-0x0000000000E60000-0x000000000134C000-memory.dmp

Filesize
4.9MB

Download
memory/2476-1-0x0000000077064000-0x0000000077066000-memory.dmp

Filesize
8KB

Download
memory/2476-2-0x0000000000E61000-0x00000000010AA000-memory.dmp

Filesize
2.3MB

Download
memory/2476-3-0x0000000000E60000-0x000000000134C000-memory.dmp

Filesize
4.9MB

Download
memory/2476-4-0x0000000000E60000-0x000000000134C000-memory.dmp

Filesize
4.9MB

Download
memory/2476-5-0x0000000000E61000-0x00000000010AA000-memory.dmp

Filesize
2.3MB

Download
memory/2476-6-0x0000000000E60000-0x000000000134C000-memory.dmp

Filesize
4.9MB

Download
memory/2476-7-0x0000000000E60000-0x000000000134C000-memory.dmp

Filesize
4.9MB

Download
memory/2476-8-0x0000000000E60000-0x000000000134C000-memory.dmp

Filesize
4.9MB

Download
memory/2476-9-0x0000000000E60000-0x000000000134C000-memory.dmp

Filesize
4.9MB

Download
memory/2476-10-0x0000000000E61000-0x00000000010AA000-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