stealc | b2aca143071281b281d2d8c9898dfd8bae8b1951b5687429b6898d0206dc3294

Analysis

max time kernel
79s
max time network
76s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
19/04/2023, 16:57

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General

Target

13d1288f5f5dadc4d49dff4d49892b99.exe
Size

236KB
MD5

13d1288f5f5dadc4d49dff4d49892b99
SHA1

e8fc4fb65025490a156bfc0b955b38ec164895cc
SHA256

b2aca143071281b281d2d8c9898dfd8bae8b1951b5687429b6898d0206dc3294
SHA512

7c4041021df3b0cf8cf768ed6bc5ce7bcf551df8501d1ce51aaeed3937faf80f311bfb8ce98a33bcbee3197ef0760762ea92311fd879dc668bb993494eee8c16
SSDEEP

3072:1Jxw83fKXce8NNt9Gz9VF2Cxocnibrz4qrxHKzrjyzh5fJ9o3e1eAwYPDpJKJRfC:Fw8g+/G4AUIqMjyzbJ9o3e1eVYPDWJ4

Score

10^/10

stealc discovery spyware stealer

Malware Config

Signatures

Detects Stealc stealer 2 IoCs

stealer

resource	yara_rule
behavioral1/memory/904-60-0x0000000000400000-0x0000000002B94000-memory.dmp	family_stealc
behavioral1/memory/904-89-0x0000000000400000-0x0000000002B94000-memory.dmp	family_stealc

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file

Deletes itself 1 IoCs

pid	Process
1916	cmd.exe

Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

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	13d1288f5f5dadc4d49dff4d49892b99.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	13d1288f5f5dadc4d49dff4d49892b99.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1676	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
904	13d1288f5f5dadc4d49dff4d49892b99.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 904 wrote to memory of 1916	904	13d1288f5f5dadc4d49dff4d49892b99.exe	29
PID 904 wrote to memory of 1916	904	13d1288f5f5dadc4d49dff4d49892b99.exe	29
PID 904 wrote to memory of 1916	904	13d1288f5f5dadc4d49dff4d49892b99.exe	29
PID 904 wrote to memory of 1916	904	13d1288f5f5dadc4d49dff4d49892b99.exe	29
PID 1916 wrote to memory of 1676	1916	cmd.exe	31
PID 1916 wrote to memory of 1676	1916	cmd.exe	31
PID 1916 wrote to memory of 1676	1916	cmd.exe	31
PID 1916 wrote to memory of 1676	1916	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\13d1288f5f5dadc4d49dff4d49892b99.exe
"C:\Users\Admin\AppData\Local\Temp\13d1288f5f5dadc4d49dff4d49892b99.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:904
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\13d1288f5f5dadc4d49dff4d49892b99.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1916
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1676

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/904-55-0x00000000001B0000-0x00000000001C6000-memory.dmp

Filesize
88KB

Download
memory/904-56-0x0000000000400000-0x0000000002B94000-memory.dmp

Filesize
39.6MB

Download
memory/904-58-0x0000000000400000-0x0000000002B94000-memory.dmp

Filesize
39.6MB

Download
memory/904-60-0x0000000000400000-0x0000000002B94000-memory.dmp

Filesize
39.6MB

Download
memory/904-63-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/904-89-0x0000000000400000-0x0000000002B94000-memory.dmp

Filesize
39.6MB

Download