stealc | c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f

General

Target

c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe
Size

1.8MB
MD5

8b5cbf86ba3b3e4ae03dbca3d8df6bef
SHA1

0555fa21f04dc96ae5e515031afb488e0ef96256
SHA256

c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f
SHA512

88e04761bc06c81a0bc8dc8c58d7fd6d15bd4e14f93981eae263404c45f56e3528bb2bdb3ffe6000e1b69a2c48255a2996b233f0831c4dd2701fc01fa7455e5b
SSDEEP

24576:reynnqjIeoWPbQm8CK0zJtHn/vqqA8cjb9DXNQ0qecnjSz29Fud7/e1sDK58xjAm:regKx5T9XTnHn/R2P9DdQQeB1sDKk

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__	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.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	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Wine	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.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
2132	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1872	2132	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	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.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	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2132	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe
2132	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2132 wrote to memory of 1872	2132	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe	31
PID 2132 wrote to memory of 1872	2132	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe	31
PID 2132 wrote to memory of 1872	2132	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe	31
PID 2132 wrote to memory of 1872	2132	c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe	31

C:\Users\Admin\AppData\Local\Temp\c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.exe
"C:\Users\Admin\AppData\Local\Temp\c171e4bf720c8cc23e9207dddabc6ae252202058fabfa16d58eae379c519be2f.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:2132
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2132 -s 920
  2⤵
  - Program crash
  PID:1872

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/2132-0-0x0000000000CB0000-0x000000000136E000-memory.dmp

Filesize
6.7MB

Download
memory/2132-1-0x00000000779E0000-0x00000000779E2000-memory.dmp

Filesize
8KB

Download
memory/2132-2-0x0000000000CB1000-0x0000000000CC8000-memory.dmp

Filesize
92KB

Download
memory/2132-3-0x0000000000CB0000-0x000000000136E000-memory.dmp

Filesize
6.7MB

Download
memory/2132-4-0x0000000000CB0000-0x000000000136E000-memory.dmp

Filesize
6.7MB

Download
memory/2132-5-0x0000000000CB0000-0x000000000136E000-memory.dmp

Filesize
6.7MB

Download
memory/2132-6-0x0000000000CB0000-0x000000000136E000-memory.dmp

Filesize
6.7MB

Download
memory/2132-7-0x0000000000CB0000-0x000000000136E000-memory.dmp

Filesize
6.7MB

Download
memory/2132-8-0x0000000000CB0000-0x000000000136E000-memory.dmp

Filesize
6.7MB

Download
memory/2132-9-0x0000000000CB0000-0x000000000136E000-memory.dmp

Filesize
6.7MB

Download
memory/2132-10-0x0000000000CB0000-0x000000000136E000-memory.dmp

Filesize
6.7MB

Download
memory/2132-11-0x0000000000CB0000-0x000000000136E000-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