stealc | cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2

General

Target

cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe
Size

1.7MB
MD5

9f930d4b2cecf249e5f18e18e3928c9f
SHA1

94724f567e44b85847c8a39840a8a898904f1b8d
SHA256

cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2
SHA512

091482a3475b76f1591341f3b121b8ff142ab33e62935e513ae2e8a0cc6308e9ebcc259567818cf6b78a5e79e68efaffa110eecac125e88a1935ffbdcd37c91e
SSDEEP

24576:N8DrG2Mbo6t2p6ZENcSmPUaqppw0sQ+Jh4Kx2YZ0Hn8Wpky9RmsTHVzKVXNdg0:Nf/c6t1Z7SmPzqpdw4q2eWNPV2Xbg

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__	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.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	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.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-1-5-21-2878641211-696417878-3864914810-1000\Software\Wine	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.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
4944	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4904	4944	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	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.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	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4944	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe
4944	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe
4944	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe
4944	cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe

C:\Users\Admin\AppData\Local\Temp\cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.exe
"C:\Users\Admin\AppData\Local\Temp\cd7f5c4f492d5d2e9fbf4a91de8a6e038d177a2ef2bcc916ab9ccc5f996421b2.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:4944
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4944 -s 1492
  2⤵
  - Program crash
  PID:4904

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4944 -ip 4944
1⤵
PID:1684

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/4944-0-0x0000000000580000-0x0000000000C0F000-memory.dmp

Filesize
6.6MB

Download
memory/4944-1-0x0000000077A14000-0x0000000077A16000-memory.dmp

Filesize
8KB

Download
memory/4944-2-0x0000000000581000-0x0000000000598000-memory.dmp

Filesize
92KB

Download
memory/4944-3-0x0000000000580000-0x0000000000C0F000-memory.dmp

Filesize
6.6MB

Download
memory/4944-4-0x0000000000580000-0x0000000000C0F000-memory.dmp

Filesize
6.6MB

Download
memory/4944-5-0x0000000000580000-0x0000000000C0F000-memory.dmp

Filesize
6.6MB

Download
memory/4944-6-0x0000000000580000-0x0000000000C0F000-memory.dmp

Filesize
6.6MB

Download
memory/4944-7-0x0000000000580000-0x0000000000C0F000-memory.dmp

Filesize
6.6MB

Download
memory/4944-8-0x0000000000580000-0x0000000000C0F000-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