stealc | 681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044

General

Target

681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe
Size

2.7MB
MD5

5f8d93018394ecd9f599aa2c10147a5f
SHA1

2d8e3a0d25f83fd723861b5d6cca4e1ca98ac3eb
SHA256

681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044
SHA512

66a5d018dec2b2353f0048113ced96e55870d78b9253b0704f625e9003293c60e03de56cf534613ece08f183701226b4f71a7ff3adafe3128e79fcadcc1359eb
SSDEEP

49152:J7ojeO1hN4Xz+JzFgH0aMmpGnbFkstH8eeySqcmM:yeO1hN4Xz+VoQZnRkYH8USqh

Score

10^/10

stealc stok discovery evasion stealer

Malware Config

Extracted

Family

stealc

Botnet

stok

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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.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	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.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.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Wine	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.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
1820	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1724	1820	WerFault.exe	28

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	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.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	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1820	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe
1820	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1820 wrote to memory of 1724	1820	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe	30
PID 1820 wrote to memory of 1724	1820	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe	30
PID 1820 wrote to memory of 1724	1820	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe	30
PID 1820 wrote to memory of 1724	1820	681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe	30

C:\Users\Admin\AppData\Local\Temp\681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.exe
"C:\Users\Admin\AppData\Local\Temp\681176f836e4a1921854c9aa2ae0fc6929b850c589beb81ccb45be4b355f2044.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:1820
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1820 -s 432
  2⤵
  - Program crash
  PID:1724

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/1820-0-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download
memory/1820-1-0x0000000077D00000-0x0000000077D02000-memory.dmp

Filesize
8KB

Download
memory/1820-2-0x0000000000891000-0x00000000008A8000-memory.dmp

Filesize
92KB

Download
memory/1820-3-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download
memory/1820-4-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download
memory/1820-5-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download
memory/1820-6-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download
memory/1820-7-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download
memory/1820-8-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download
memory/1820-9-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download
memory/1820-10-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download
memory/1820-12-0x0000000000890000-0x0000000000D83000-memory.dmp

Filesize
4.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads