stealc | bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c

General

Target

bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe
Size

1.8MB
MD5

25ab4e70f03f24ec678b0567de43dbd1
SHA1

a7b2e3aeb5f285a59e63301e7bd088472522d0d8
SHA256

bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c
SHA512

876cd035eeda9efafc69d5bed8823c9b8c80fbd271f43b65f37d367f604d4c5f2503414d2733a16e5d882689387af246ecf67ca5bf9d910efef05b61260bf01a
SSDEEP

24576:NCj6auaenjw2qahBxutnG2PRQ3VmlmIoSqHpZve5qyzqMgbHNjNqu0QcIr2F:NTau7zTBxutnnd/qJkULzqu0QX2

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__	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.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	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.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-1-5-21-2045521122-590294423-3465680274-1000\Software\Wine	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.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
3832	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3104	3832	WerFault.exe	82

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	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.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	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3832	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe
3832	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe
3832	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe
3832	bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe

C:\Users\Admin\AppData\Local\Temp\bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.exe
"C:\Users\Admin\AppData\Local\Temp\bf9f90d33bc9105a3126f0d01e5fff98dafdc83f7d027510100f1b83aad7ba9c.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
PID:3832
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3832 -s 1504
  2⤵
  - Program crash
  PID:3104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 3832 -ip 3832
1⤵
PID:1976

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/3832-0-0x0000000000570000-0x0000000000C18000-memory.dmp

Filesize
6.7MB

Download
memory/3832-1-0x0000000077134000-0x0000000077136000-memory.dmp

Filesize
8KB

Download
memory/3832-2-0x0000000000571000-0x0000000000588000-memory.dmp

Filesize
92KB

Download
memory/3832-3-0x0000000000570000-0x0000000000C18000-memory.dmp

Filesize
6.7MB

Download
memory/3832-4-0x0000000000570000-0x0000000000C18000-memory.dmp

Filesize
6.7MB

Download
memory/3832-5-0x0000000000570000-0x0000000000C18000-memory.dmp

Filesize
6.7MB

Download
memory/3832-6-0x0000000000570000-0x0000000000C18000-memory.dmp

Filesize
6.7MB

Download
memory/3832-7-0x0000000000570000-0x0000000000C18000-memory.dmp

Filesize
6.7MB

Download
memory/3832-8-0x0000000000570000-0x0000000000C18000-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