stealc | 990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c

General

Target

990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe
Size

1.7MB
MD5

d86c1eb28ee301715af07d167663b79f
SHA1

eb7790f06c77fa2977e13b769ab12653e5bd8ec9
SHA256

990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c
SHA512

1921bbf61f7d7e9da42160b7316fc644896cd032746ba2004e5757c79861eb527fd68b00ecaebd157d8954b325f6ea73a5f579a37961d90f73b45e535f57979c
SSDEEP

49152:o3WH/F/dU4Ho8PP3rGMnDuxJulGwcbrjtn7R2:JN/Dv33rGDxJuMtrjW

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__	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.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	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Wine	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.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
2724	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2856	2724	WerFault.exe	30

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	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2724	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe
2724	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2724 wrote to memory of 2856	2724	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe	32
PID 2724 wrote to memory of 2856	2724	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe	32
PID 2724 wrote to memory of 2856	2724	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe	32
PID 2724 wrote to memory of 2856	2724	990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe	32

C:\Users\Admin\AppData\Local\Temp\990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.exe
"C:\Users\Admin\AppData\Local\Temp\990c9975ecdf091324c7d3f6f272ddec10ed1eb6fa72e00d27028576985e036c.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:2724
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2724 -s 932
  2⤵
  - Program crash
  PID:2856

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/2724-0-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download
memory/2724-1-0x00000000779A0000-0x00000000779A2000-memory.dmp

Filesize
8KB

Download
memory/2724-3-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download
memory/2724-2-0x0000000000A21000-0x0000000000A38000-memory.dmp

Filesize
92KB

Download
memory/2724-4-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download
memory/2724-5-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download
memory/2724-6-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download
memory/2724-7-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download
memory/2724-8-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download
memory/2724-9-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download
memory/2724-10-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download
memory/2724-11-0x0000000000A20000-0x00000000010B0000-memory.dmp

Filesize
6.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads