stealc | 91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a

General

Target

91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe
Size

5.0MB
MD5

cbd2fa27b23ef8d22b069da99ab7a85e
SHA1

44713114ba5e9053012b0ad2fba3abbe20bff5fb
SHA256

91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a
SHA512

5128fa342572315bd13eb4d424179b0182355f733f741ad185b476a7d0eac111dd000405c9034b0628934a6e3a3a0ad920c2d2a2afde43c1cb27295f13c420f2
SSDEEP

49152:KYjbYJvZ1cu0zCHU072ave9I9fGfZH+BMw5vDCEF+:bjEvZCZzCHU072avMyufwB9hDCEF+

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__	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.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	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.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-1-5-21-3533259084-2542256011-65585152-1000\Software\Wine	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.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
2380	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2660	2380	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	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.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	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2380	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe
2380	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2660	2380	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe	31
PID 2380 wrote to memory of 2660	2380	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe	31
PID 2380 wrote to memory of 2660	2380	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe	31
PID 2380 wrote to memory of 2660	2380	91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe	31

C:\Users\Admin\AppData\Local\Temp\91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.exe
"C:\Users\Admin\AppData\Local\Temp\91d789fa7a06fada03106928510285e633209cd425d7f66144a9dc56ed6c313a.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:2380
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2380 -s 936
  2⤵
  - Program crash
  PID:2660

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/2380-0-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-1-0x0000000076F30000-0x0000000076F32000-memory.dmp

Filesize
8KB

Download
memory/2380-2-0x00000000013D1000-0x000000000161A000-memory.dmp

Filesize
2.3MB

Download
memory/2380-3-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-4-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-5-0x00000000013D1000-0x000000000161A000-memory.dmp

Filesize
2.3MB

Download
memory/2380-6-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-7-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-8-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-9-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-10-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-11-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-12-0x00000000013D0000-0x00000000018DA000-memory.dmp

Filesize
5.0MB

Download
memory/2380-13-0x00000000013D1000-0x000000000161A000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads