stealc | 31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e

General

Target

31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe
Size

1.7MB
MD5

022a715451381bc483237789bcb7b764
SHA1

77e6f11ab81ccafee442d3d32459e0a6afe5fb8e
SHA256

31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e
SHA512

07f35c6bd0b8d959a43754ab4add21fcd4b76426d1001630fce801da160a67f829a1a3ac1424731002c9117557e4fdb9fbe1b2a9507f2b56842762bbbf7bcb41
SSDEEP

49152:m6tG5xgs0TcMlhFvzk8TLcQj2UyOjmboSIC:1Ygs0Tdh1zhLT2UDjmboSx

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__	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.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	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.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	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.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
3028	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3056	3028	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	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.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	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3028	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe
3028	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3028 wrote to memory of 3056	3028	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe	32
PID 3028 wrote to memory of 3056	3028	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe	32
PID 3028 wrote to memory of 3056	3028	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe	32
PID 3028 wrote to memory of 3056	3028	31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe	32

C:\Users\Admin\AppData\Local\Temp\31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.exe
"C:\Users\Admin\AppData\Local\Temp\31d96e85f40cf3a9ccb9ba88b10a926f805f029438ec46d86fff89c9fba5b30e.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:3028
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3028 -s 924
  2⤵
  - Program crash
  PID:3056

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/3028-3-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download
memory/3028-2-0x00000000003C1000-0x00000000003D8000-memory.dmp

Filesize
92KB

Download
memory/3028-1-0x0000000077B90000-0x0000000077B92000-memory.dmp

Filesize
8KB

Download
memory/3028-0-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download
memory/3028-4-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download
memory/3028-5-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download
memory/3028-6-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download
memory/3028-7-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download
memory/3028-8-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download
memory/3028-9-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download
memory/3028-10-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download
memory/3028-11-0x00000000003C0000-0x0000000000A67000-memory.dmp

Filesize
6.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads