stealc | af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c

General

Target

af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe
Size

1.8MB
MD5

db87494c774d26801e470e070372e4d7
SHA1

55bbb939e20afb21cdf80116213640f6309bff9f
SHA256

af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c
SHA512

234f1fdfe4a79d2092f49ccb61d9abb81be6c906f6ee27deb543efb7e563af765975f35384ccc745833df815220aeace0847a96550f7b86db4d933d937f2b7b9
SSDEEP

49152:SVbg+QYpeOCYD2gSQNXPOh+gFXqY2XZY/kVZ+QI9:+g+QYQOCYD2yxOh+gF6n37fI9

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__	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.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	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Wine	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.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
1956	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2096	1956	WerFault.exe	30

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	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.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	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1956	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe
1956	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 2096	1956	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe	32
PID 1956 wrote to memory of 2096	1956	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe	32
PID 1956 wrote to memory of 2096	1956	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe	32
PID 1956 wrote to memory of 2096	1956	af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe	32

C:\Users\Admin\AppData\Local\Temp\af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.exe
"C:\Users\Admin\AppData\Local\Temp\af67abc887e14a941251f6ce5990e953a32b9612edf68dea9e662b4ac883b97c.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:1956
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1956 -s 924
  2⤵
  - Program crash
  PID:2096

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/1956-0-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download
memory/1956-1-0x00000000773B0000-0x00000000773B2000-memory.dmp

Filesize
8KB

Download
memory/1956-2-0x0000000001351000-0x0000000001368000-memory.dmp

Filesize
92KB

Download
memory/1956-3-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download
memory/1956-4-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download
memory/1956-5-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download
memory/1956-6-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download
memory/1956-7-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download
memory/1956-8-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download
memory/1956-9-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download
memory/1956-10-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download
memory/1956-11-0x0000000001350000-0x0000000001A0B000-memory.dmp

Filesize
6.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads