stealc | f2a959caed0d99d3ff313f6c7f70a8752d8bc2dbfda56ea577596ffadd980e67

General

Target

random.exe
Size

1.7MB
MD5

cfed3795b5df45bbd48f493175331240
SHA1

53dc65f12e0d3db668365282f6add85bc42619a5
SHA256

f2a959caed0d99d3ff313f6c7f70a8752d8bc2dbfda56ea577596ffadd980e67
SHA512

d9d3c6760a7f143b2651cccc8fe2b7a79d010a17df508becdc5353c75b0e3f6afd96ce00644817e9a6ad5c419bdad01cb5dd442958e0fb8113fc364dc4201a75
SSDEEP

49152:fwA35/F+M/hzNeSpX94/08cM3Gky7VF1/dgzRJ3U:f55/NpNZMcg3G/7Xk3

Score

10^/10

stealc brat discovery evasion 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

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	random.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	random.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	random.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	random.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
2396	random.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2676	2396	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	random.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	random.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	random.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2396	random.exe
2396	random.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2396 wrote to memory of 2676	2396	random.exe	31
PID 2396 wrote to memory of 2676	2396	random.exe	31
PID 2396 wrote to memory of 2676	2396	random.exe	31
PID 2396 wrote to memory of 2676	2396	random.exe	31

C:\Users\Admin\AppData\Local\Temp\random.exe
"C:\Users\Admin\AppData\Local\Temp\random.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:2396
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2396 -s 936
  2⤵
  - Program crash
  PID:2676

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/2396-0-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download
memory/2396-1-0x0000000076F30000-0x0000000076F32000-memory.dmp

Filesize
8KB

Download
memory/2396-2-0x0000000000C51000-0x0000000000C68000-memory.dmp

Filesize
92KB

Download
memory/2396-3-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download
memory/2396-4-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download
memory/2396-5-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download
memory/2396-6-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download
memory/2396-7-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download
memory/2396-8-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download
memory/2396-9-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download
memory/2396-10-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download
memory/2396-11-0x0000000000C50000-0x00000000012D5000-memory.dmp

Filesize
6.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads