stealc | f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8

General

Target

f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe
Size

2.7MB
MD5

706812bdb8a6402e3057822ee441bafe
SHA1

94d9f73fe881ff6b8dd5d74d7b9eb99d17820097
SHA256

f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8
SHA512

40288ef8ad8e99b502277289c1e630f70b7fb8446ae4ea65f9b530642e08a413fca89e9bc1498e1a54614c8d044e2a131c3fcd6bfdf361e0feef1fea553d8fd1
SSDEEP

49152:LquX/r8KJCuvd6IimIZBZTrw7PELcDi/4sh0:LL/r8KJCk6hmyZTr3LcO4

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__	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.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	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Wine	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.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
2236	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2640	2236	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	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.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	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2236	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe
2236	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2640	2236	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe	32
PID 2236 wrote to memory of 2640	2236	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe	32
PID 2236 wrote to memory of 2640	2236	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe	32
PID 2236 wrote to memory of 2640	2236	f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe	32

C:\Users\Admin\AppData\Local\Temp\f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.exe
"C:\Users\Admin\AppData\Local\Temp\f5fb72ef564b0486ec065be745d19e46df2cc6e330ce50f507606a140dfd4ce8.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:2236
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2236 -s 928
  2⤵
  - Program crash
  PID:2640

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/2236-0-0x0000000001280000-0x000000000176E000-memory.dmp

Filesize
4.9MB

Download
memory/2236-1-0x0000000077000000-0x0000000077002000-memory.dmp

Filesize
8KB

Download
memory/2236-2-0x0000000001281000-0x0000000001298000-memory.dmp

Filesize
92KB

Download
memory/2236-3-0x0000000001280000-0x000000000176E000-memory.dmp

Filesize
4.9MB

Download
memory/2236-4-0x0000000001280000-0x000000000176E000-memory.dmp

Filesize
4.9MB

Download
memory/2236-5-0x0000000001280000-0x000000000176E000-memory.dmp

Filesize
4.9MB

Download
memory/2236-6-0x0000000001280000-0x000000000176E000-memory.dmp

Filesize
4.9MB

Download
memory/2236-7-0x0000000001280000-0x000000000176E000-memory.dmp

Filesize
4.9MB

Download
memory/2236-8-0x0000000001280000-0x000000000176E000-memory.dmp

Filesize
4.9MB

Download
memory/2236-9-0x0000000001280000-0x000000000176E000-memory.dmp

Filesize
4.9MB

Download
memory/2236-10-0x0000000001280000-0x000000000176E000-memory.dmp

Filesize
4.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads