stealc | f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4

General

Target

f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe
Size

1.7MB
MD5

cae954501ce8456fce9b5a8092a3b943
SHA1

f305a992b3e43fefead18c67512871ad05bcea4e
SHA256

f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4
SHA512

a7a4ddd819e2e41e647d80180e01ae21d2ca24aa39f4025ba68dd03b4f300c620c2a166cff7f1605c61a26422b418ab46e680ecafd8f7572c330fa1cbea4900b
SSDEEP

49152:AsVHDtXyPHaJuUSMidnGpOEb2vBHC/8jVQqb:bFtCPHM5WnGnKvBieVDb

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__	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.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\VideoBiosVersion	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Wine	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.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
1696	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2728	1696	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	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.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	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1696	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe
1696	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 2728	1696	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe	32
PID 1696 wrote to memory of 2728	1696	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe	32
PID 1696 wrote to memory of 2728	1696	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe	32
PID 1696 wrote to memory of 2728	1696	f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe	32

C:\Users\Admin\AppData\Local\Temp\f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.exe
"C:\Users\Admin\AppData\Local\Temp\f40d7d9ce832ba5f6a79f336dcb9262468be0222bae0770f9a1c2e7abfe686c4.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:1696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1696 -s 932
  2⤵
  - Program crash
  PID:2728

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/1696-0-0x0000000000F40000-0x00000000015E0000-memory.dmp

Filesize
6.6MB

Download
memory/1696-1-0x0000000077A90000-0x0000000077A92000-memory.dmp

Filesize
8KB

Download
memory/1696-2-0x0000000000F41000-0x0000000000F58000-memory.dmp

Filesize
92KB

Download
memory/1696-3-0x0000000000F40000-0x00000000015E0000-memory.dmp

Filesize
6.6MB

Download
memory/1696-4-0x0000000000F40000-0x00000000015E0000-memory.dmp

Filesize
6.6MB

Download
memory/1696-5-0x0000000000F40000-0x00000000015E0000-memory.dmp

Filesize
6.6MB

Download
memory/1696-6-0x0000000000F40000-0x00000000015E0000-memory.dmp

Filesize
6.6MB

Download
memory/1696-7-0x0000000000F40000-0x00000000015E0000-memory.dmp

Filesize
6.6MB

Download
memory/1696-8-0x0000000000F40000-0x00000000015E0000-memory.dmp

Filesize
6.6MB

Download
memory/1696-9-0x0000000000F40000-0x00000000015E0000-memory.dmp

Filesize
6.6MB

Download
memory/1696-10-0x0000000000F40000-0x00000000015E0000-memory.dmp

Filesize
6.6MB

Download
memory/1696-11-0x0000000000F40000-0x00000000015E0000-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