stealc | 99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b

General

Target

99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe
Size

1.7MB
MD5

5e357cf303104d8c20dce948abfc1de7
SHA1

229322e761afbc2247f53747fc5e8343dae789f0
SHA256

99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b
SHA512

352c223b029c5c1ca4204ecc677b14c24cac9d8c57ceb93ea091f1686d6ae3f5a7433192e346ef017d3e165b4def09fa9dfccbf8c840ff936a5a50ef15d1b7eb
SSDEEP

49152:9mapYrydqs3olQlwNRAdfaIMATUyQJWvBy1B+x8+jTx3i:9ppNdqs3olCIIMAIZW81ajTx3

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__	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.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	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.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-1-5-21-4177215427-74451935-3209572229-1000\Software\Wine	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.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
1652	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2552	1652	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	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.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	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1652	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe
1652	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 2552	1652	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe	32
PID 1652 wrote to memory of 2552	1652	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe	32
PID 1652 wrote to memory of 2552	1652	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe	32
PID 1652 wrote to memory of 2552	1652	99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe	32

C:\Users\Admin\AppData\Local\Temp\99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.exe
"C:\Users\Admin\AppData\Local\Temp\99d3be2d553f6653ff839bb1abdb7f81dc9e009d4998f5c4791373c9a546b06b.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:1652
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1652 -s 932
  2⤵
  - Program crash
  PID:2552

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/1652-0-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download
memory/1652-1-0x0000000077BA0000-0x0000000077BA2000-memory.dmp

Filesize
8KB

Download
memory/1652-2-0x00000000009F1000-0x0000000000A08000-memory.dmp

Filesize
92KB

Download
memory/1652-3-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download
memory/1652-4-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download
memory/1652-5-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download
memory/1652-6-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download
memory/1652-7-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download
memory/1652-8-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download
memory/1652-9-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download
memory/1652-10-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download
memory/1652-11-0x00000000009F0000-0x0000000001091000-memory.dmp

Filesize
6.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads