stealc | b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17

General

Target

b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe
Size

1.7MB
MD5

470aa1549c4266690a1a8d6d921017f9
SHA1

57359f54841f8d0a4ae15fa53e9eb3dca725fa36
SHA256

b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17
SHA512

342cfe3b63c4654baea57b3217d2a841083ea41e2b13f218ad861086b5dad8a043ab110259650cb537f7e43e5dfbf706f1dbff33554bae9803637111b9836513
SSDEEP

49152:KP91YLxkL49T6DuKD/xuR5LFIQgEh4ULV6GV0qrC6C5Yon:KVmJcbQR5RAfjGXrCZ

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__	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.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	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.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-1-5-21-2878641211-696417878-3864914810-1000\Software\Wine	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.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
4700	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
404	4700	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	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.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	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4700	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe
4700	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe
4700	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe
4700	b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe

C:\Users\Admin\AppData\Local\Temp\b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.exe
"C:\Users\Admin\AppData\Local\Temp\b7c3785aa2b9f10fc77bf33df04b2845d06d0ccfefd9df2af598f7ac0cf99f17.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:4700
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4700 -s 1476
  2⤵
  - Program crash
  PID:404

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4700 -ip 4700
1⤵
PID:2960

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/4700-0-0x00000000001F0000-0x0000000000878000-memory.dmp

Filesize
6.5MB

Download
memory/4700-1-0x0000000077BC4000-0x0000000077BC6000-memory.dmp

Filesize
8KB

Download
memory/4700-2-0x00000000001F1000-0x0000000000208000-memory.dmp

Filesize
92KB

Download
memory/4700-3-0x00000000001F0000-0x0000000000878000-memory.dmp

Filesize
6.5MB

Download
memory/4700-4-0x00000000001F0000-0x0000000000878000-memory.dmp

Filesize
6.5MB

Download
memory/4700-5-0x00000000001F0000-0x0000000000878000-memory.dmp

Filesize
6.5MB

Download
memory/4700-6-0x00000000001F0000-0x0000000000878000-memory.dmp

Filesize
6.5MB

Download
memory/4700-7-0x00000000001F0000-0x0000000000878000-memory.dmp

Filesize
6.5MB

Download
memory/4700-8-0x00000000001F0000-0x0000000000878000-memory.dmp

Filesize
6.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads