stealc | b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b

General

Target

b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe
Size

4.9MB
MD5

09802b796640116d80c79a5f6072ba00
SHA1

f1da66411b6a003b2b0fd4dc31483de8c8c9413f
SHA256

b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b
SHA512

149b70e49ec0a7cff8b9fc3e2d37ed1a7f96172747b5a157b55cd3a885364f310f33e913ca96e0f5484ec99008574e2f93ad561e986c70452ce478ae17aa5c40
SSDEEP

49152:bHl+/IzmuxULCxAS8DOZ/USNmzdojXWRJ1HEs:bHl+Azm8ULCx98DOZ/hAdoTK7HEs

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__	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.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	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.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-1-5-21-312935884-697965778-3955649944-1000\Software\Wine	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.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
2252	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2864	2252	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	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.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	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2252	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe
2252	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2864	2252	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe	32
PID 2252 wrote to memory of 2864	2252	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe	32
PID 2252 wrote to memory of 2864	2252	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe	32
PID 2252 wrote to memory of 2864	2252	b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe	32

C:\Users\Admin\AppData\Local\Temp\b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.exe
"C:\Users\Admin\AppData\Local\Temp\b1c5cff848bcd495de524d2047c66a0cd6fa37c7a0301981255da30a5496673b.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:2252
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2252 -s 924
  2⤵
  - Program crash
  PID:2864

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/2252-0-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-1-0x0000000077050000-0x0000000077052000-memory.dmp

Filesize
8KB

Download
memory/2252-2-0x0000000000BC1000-0x0000000000E0A000-memory.dmp

Filesize
2.3MB

Download
memory/2252-3-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-4-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-5-0x0000000000BC1000-0x0000000000E0A000-memory.dmp

Filesize
2.3MB

Download
memory/2252-6-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-7-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-8-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-9-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-10-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-11-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-12-0x0000000000BC0000-0x00000000010A1000-memory.dmp

Filesize
4.9MB

Download
memory/2252-13-0x0000000000BC1000-0x0000000000E0A000-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