stealc | 39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267

General

Target

39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe
Size

1.7MB
MD5

a66a2a935d8c962de51782747aca83af
SHA1

f39009890a885dbe3cce3a488ff9f909c040f6cc
SHA256

39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267
SHA512

b360e42f0f85c2988ec1c0216ee855467f78500e878e0f035eb6317e0d870c3ac315e9438f6ee487e4bf743dd673959bb663a20cba69e04a398aad4d5658044b
SSDEEP

49152:iGKQT8suM9FB0Lw1xPSuxOF2Ojl16iE+Q9LnhepsCGv8b:iGngCuw1susF7jv6TPLhCw8

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__	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.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	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.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-1-5-21-4177215427-74451935-3209572229-1000\Software\Wine	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.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
2672	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2900	2672	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	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.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	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2672	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe
2672	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 2900	2672	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe	32
PID 2672 wrote to memory of 2900	2672	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe	32
PID 2672 wrote to memory of 2900	2672	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe	32
PID 2672 wrote to memory of 2900	2672	39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe	32

C:\Users\Admin\AppData\Local\Temp\39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.exe
"C:\Users\Admin\AppData\Local\Temp\39f1233582871e88165f5db5f7a53fa5532a801258b2c1ff65eb1adb8a0cd267.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:2672
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2672 -s 928
  2⤵
  - Program crash
  PID:2900

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/2672-0-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download
memory/2672-1-0x0000000077C80000-0x0000000077C82000-memory.dmp

Filesize
8KB

Download
memory/2672-2-0x00000000008E1000-0x00000000008F8000-memory.dmp

Filesize
92KB

Download
memory/2672-3-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download
memory/2672-4-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download
memory/2672-5-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download
memory/2672-6-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download
memory/2672-7-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download
memory/2672-8-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download
memory/2672-9-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download
memory/2672-10-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download
memory/2672-11-0x00000000008E0000-0x0000000000F7F000-memory.dmp

Filesize
6.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads