stealc | 3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b

General

Target

3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe
Size

5.0MB
MD5

0c7c00ca271f7515cec3422471b4dc1d
SHA1

c5370ab49e18b77a7cad15810bf6753b4a86800c
SHA256

3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b
SHA512

9fc0db1b6758dcc041a8e90328a476f3932abfceadad21dc979b4377fc49a204042d74e8bc1e6b3eaa86611fd566cea6baad214e6717f7be12ec22fbec8cd293
SSDEEP

49152:tFcdrrX+hk6rGgsmDPAZcIVRKkfvTz/zgxYTtcJhwcWcw+:iHkk6rhPD4/RNkxYxf

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__	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.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	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.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-1-5-21-1488793075-819845221-1497111674-1000\Software\Wine	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.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
2900	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2668	2900	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	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.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	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2900	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe
2900	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 2668	2900	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe	32
PID 2900 wrote to memory of 2668	2900	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe	32
PID 2900 wrote to memory of 2668	2900	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe	32
PID 2900 wrote to memory of 2668	2900	3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe	32

C:\Users\Admin\AppData\Local\Temp\3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.exe
"C:\Users\Admin\AppData\Local\Temp\3fdf3422e1b73f087f3f02216b258e9816709786a8e639a21a2d7b0f9118092b.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:2900
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2900 -s 932
  2⤵
  - Program crash
  PID:2668

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/2900-0-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-1-0x00000000773F0000-0x00000000773F2000-memory.dmp

Filesize
8KB

Download
memory/2900-2-0x0000000000D51000-0x0000000000F9A000-memory.dmp

Filesize
2.3MB

Download
memory/2900-3-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-4-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-5-0x0000000000D51000-0x0000000000F9A000-memory.dmp

Filesize
2.3MB

Download
memory/2900-6-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-7-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-8-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-9-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-10-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-11-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-12-0x0000000000D50000-0x0000000001248000-memory.dmp

Filesize
5.0MB

Download
memory/2900-13-0x0000000000D51000-0x0000000000F9A000-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