stealc | 55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1

General

Target

55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe
Size

4.9MB
MD5

4fb17c975189aaddf8f73e55672e15db
SHA1

f95440a84bc20f1a35c7a6aba46ad9b2edc1139b
SHA256

55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1
SHA512

26ee58a20d259c5ffa50699e39e98db2d7e94e4c623d5dca5177388c469d8b0f32d14d0be98accd0c154e59d1f2b67289914c052e028e2adce3ab37410678af2
SSDEEP

49152:7YC7JVgons02oDi0J3R8RPZK3vbV/ykeaBBF1:EY2ons0BDi0J3RuPMfbMWL

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__	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.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	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Wine	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.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
812	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2644	812	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	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.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	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
812	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe
812	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 812 wrote to memory of 2644	812	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe	32
PID 812 wrote to memory of 2644	812	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe	32
PID 812 wrote to memory of 2644	812	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe	32
PID 812 wrote to memory of 2644	812	55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe	32

C:\Users\Admin\AppData\Local\Temp\55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.exe
"C:\Users\Admin\AppData\Local\Temp\55f15526b557380bd03f86b0f06361358ac7fa22ffc1d2bfdcf131c5b2e581f1.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:812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 812 -s 924
  2⤵
  - Program crash
  PID:2644

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/812-0-0x0000000001040000-0x000000000152A000-memory.dmp

Filesize
4.9MB

Download
memory/812-1-0x0000000077070000-0x0000000077072000-memory.dmp

Filesize
8KB

Download
memory/812-2-0x0000000001041000-0x000000000128A000-memory.dmp

Filesize
2.3MB

Download
memory/812-3-0x0000000001040000-0x000000000152A000-memory.dmp

Filesize
4.9MB

Download
memory/812-4-0x0000000001040000-0x000000000152A000-memory.dmp

Filesize
4.9MB

Download
memory/812-5-0x0000000001041000-0x000000000128A000-memory.dmp

Filesize
2.3MB

Download
memory/812-6-0x0000000001040000-0x000000000152A000-memory.dmp

Filesize
4.9MB

Download
memory/812-7-0x0000000001040000-0x000000000152A000-memory.dmp

Filesize
4.9MB

Download
memory/812-8-0x0000000001040000-0x000000000152A000-memory.dmp

Filesize
4.9MB

Download
memory/812-9-0x0000000001040000-0x000000000152A000-memory.dmp

Filesize
4.9MB

Download
memory/812-10-0x0000000001040000-0x000000000152A000-memory.dmp

Filesize
4.9MB

Download
memory/812-11-0x0000000001040000-0x000000000152A000-memory.dmp

Filesize
4.9MB

Download
memory/812-12-0x0000000001041000-0x000000000128A000-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