stealc | 81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1

Analysis

max time kernel
131s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
26/02/2025, 17:49

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General

Target

81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.exe
Size

1.7MB
MD5

1e95dc10fef7079a5d3fa793732a7cce
SHA1

8e9ccb511e76c921c6ddf2a2615a2e3c86ea4113
SHA256

81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1
SHA512

c35cb0cc0cc9046acab79fc70e26c28fa32f86e79dc36d44f938efada6bd45b190746d6f966552aa3eba45967b7f3ba7e113d8593576b7bb7f7fcaf670a23773
SSDEEP

49152:QShNR7nL8ZBF9CuDe7VL4a1PzDaisxBU0Su1bJX+:HR74ZoMeJL4aZXai+BxSu1l

Score

10^/10

stealc reno defense_evasion discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

reno

http://185.215.113.115

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__	81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.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	81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.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-1-5-21-925314154-1797147466-1467878628-1000\Software\Wine	81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2236	81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.exe

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	81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2236	81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.exe
2236	81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.exe

C:\Users\Admin\AppData\Local\Temp\81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.exe
"C:\Users\Admin\AppData\Local\Temp\81ac77037e15e56a6cdc0ba7e2af38e3e5a9f7a353054276c763e57d03db5ec1.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
- Suspicious behavior: EnumeratesProcesses
PID:2236

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2236-0-0x0000000000DB0000-0x0000000001459000-memory.dmp

Filesize
6.7MB

Download
memory/2236-1-0x00000000778D4000-0x00000000778D6000-memory.dmp

Filesize
8KB

Download
memory/2236-2-0x0000000000DB1000-0x0000000000DC8000-memory.dmp

Filesize
92KB

Download
memory/2236-3-0x0000000000DB0000-0x0000000001459000-memory.dmp

Filesize
6.7MB

Download
memory/2236-5-0x0000000000DB0000-0x0000000001459000-memory.dmp

Filesize
6.7MB

Download