stealc | 28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188

General

Target

28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe
Size

1.8MB
MD5

e7c42122db3ea32ba5fbf3de36a437f8
SHA1

0c9413a9369ff05f8afb76a70f8018ce07da81aa
SHA256

28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188
SHA512

8e8784d5c3cbf767a1737d8a8cc4bdb22393727e000ebd6f5fb383989b5cb81e77f04c55b3c11f62dcc75a06c35cf2884fbb23e4cd21875243e9a035694d0e5a
SSDEEP

49152:0kPP3Z1n70xv6QwRhiUcvBb5YU2VN+UKbeP+wfJRtkbff:LPvbqyQSgNXYt6xwBzkbf

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__	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.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	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.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-1-5-21-3533259084-2542256011-65585152-1000\Software\Wine	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.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
292	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2628	292	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	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.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	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
292	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe
292	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 292 wrote to memory of 2628	292	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe	32
PID 292 wrote to memory of 2628	292	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe	32
PID 292 wrote to memory of 2628	292	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe	32
PID 292 wrote to memory of 2628	292	28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe	32

C:\Users\Admin\AppData\Local\Temp\28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.exe
"C:\Users\Admin\AppData\Local\Temp\28037fb7a609b5c42ec85724b16c7823befdbdf8d4bdc5320f78cc0cf4b90188.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:292
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 292 -s 924
  2⤵
  - Program crash
  PID:2628

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/292-0-0x00000000008A0000-0x0000000000F48000-memory.dmp

Filesize
6.7MB

Download
memory/292-1-0x0000000077500000-0x0000000077502000-memory.dmp

Filesize
8KB

Download
memory/292-2-0x00000000008A1000-0x00000000008B8000-memory.dmp

Filesize
92KB

Download
memory/292-3-0x00000000008A0000-0x0000000000F48000-memory.dmp

Filesize
6.7MB

Download
memory/292-4-0x00000000008A0000-0x0000000000F48000-memory.dmp

Filesize
6.7MB

Download
memory/292-5-0x00000000008A0000-0x0000000000F48000-memory.dmp

Filesize
6.7MB

Download
memory/292-6-0x00000000008A0000-0x0000000000F48000-memory.dmp

Filesize
6.7MB

Download
memory/292-7-0x00000000008A0000-0x0000000000F48000-memory.dmp

Filesize
6.7MB

Download
memory/292-8-0x00000000008A0000-0x0000000000F48000-memory.dmp

Filesize
6.7MB

Download
memory/292-9-0x00000000008A0000-0x0000000000F48000-memory.dmp

Filesize
6.7MB

Download
memory/292-10-0x00000000008A0000-0x0000000000F48000-memory.dmp

Filesize
6.7MB

Download
memory/292-11-0x00000000008A0000-0x0000000000F48000-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