stealc | 1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf

General

Target

1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe
Size

1.8MB
MD5

36c97fee4221becab44a8e2a0cd26271
SHA1

1f0c71bac470518971af2d60012d7710f3f35dc3
SHA256

1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf
SHA512

b60b0d022614ebbbaea0a3047b20b7f8361d7720cd087aea6e9272bdbaedb961b8b19997d35bc6bb4fc97ac200226791d45d8fe48a81a41563e82f83d7ac87f5
SSDEEP

49152:6HXc6mDkJBHOg6jCgu0sk4h0UnTAo6gtFbpQ4:63c6mO36/xsk4hLnTp6grb3

Score

10^/10

stealc brat defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

brat

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

defense_evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.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	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.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.

defense_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	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.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
2136	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2656	2136	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	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.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	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2136	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe
2136	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 2656	2136	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe	32
PID 2136 wrote to memory of 2656	2136	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe	32
PID 2136 wrote to memory of 2656	2136	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe	32
PID 2136 wrote to memory of 2656	2136	1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe	32

C:\Users\Admin\AppData\Local\Temp\1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.exe
"C:\Users\Admin\AppData\Local\Temp\1cb5a19ee0b31b54658358590067ef7a2ff6aa066383c75754ca8df7a8a194cf.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:2136
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2136 -s 932
  2⤵
  - Program crash
  PID:2656

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/2136-0-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download
memory/2136-1-0x0000000077050000-0x0000000077052000-memory.dmp

Filesize
8KB

Download
memory/2136-2-0x0000000000881000-0x0000000000898000-memory.dmp

Filesize
92KB

Download
memory/2136-3-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download
memory/2136-4-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download
memory/2136-5-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download
memory/2136-6-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download
memory/2136-7-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download
memory/2136-8-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download
memory/2136-9-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download
memory/2136-10-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download
memory/2136-11-0x0000000000880000-0x0000000000F33000-memory.dmp

Filesize
6.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads