stealc | 22d3277898429127b4566110be173684bdcb40773cac030bc4818dfd4677a3b0

Analysis

max time kernel
38s
max time network
35s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
submitted
05/07/2023, 13:21

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target

b003fca8539284507976b319201efd5e.exe
Size

221KB
MD5

b003fca8539284507976b319201efd5e
SHA1

a5b23388a47a3530e81b4b32e173526c20b55e88
SHA256

22d3277898429127b4566110be173684bdcb40773cac030bc4818dfd4677a3b0
SHA512

21e12da259f8b05d112b8d705c67959b9642c94cd3ef59429689eb74ad54202a52dfdb29ab4d16df8173fb140b904e58ebf19d33073d6ba01ad9c4955b75e2ac
SSDEEP

3072:6oYWKJDW7QH3apiqevYo8n7BhUygUkK8gCE+Cs9P1oB6n:Z1pY3agqebuthUyRky+rsB

Score

10^/10

stealc discovery stealer

Malware Config

Extracted

Family

stealc

http://45.15.159.188/f2cb651e3e755a0f.php

Signatures

Detects Stealc stealer 3 IoCs

stealer

resource	yara_rule
behavioral1/memory/2024-55-0x00000000003C0000-0x00000000003D6000-memory.dmp	family_stealc
behavioral1/memory/2024-74-0x0000000000400000-0x0000000001B39000-memory.dmp	family_stealc
behavioral1/memory/2024-77-0x0000000000400000-0x0000000001B39000-memory.dmp	family_stealc

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

Deletes itself 1 IoCs

pid	Process
1444	cmd.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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	b003fca8539284507976b319201efd5e.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	b003fca8539284507976b319201efd5e.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1512	timeout.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2024	b003fca8539284507976b319201efd5e.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2024 wrote to memory of 1444	2024	b003fca8539284507976b319201efd5e.exe	28
PID 2024 wrote to memory of 1444	2024	b003fca8539284507976b319201efd5e.exe	28
PID 2024 wrote to memory of 1444	2024	b003fca8539284507976b319201efd5e.exe	28
PID 2024 wrote to memory of 1444	2024	b003fca8539284507976b319201efd5e.exe	28
PID 1444 wrote to memory of 1512	1444	cmd.exe	30
PID 1444 wrote to memory of 1512	1444	cmd.exe	30
PID 1444 wrote to memory of 1512	1444	cmd.exe	30
PID 1444 wrote to memory of 1512	1444	cmd.exe	30

C:\Users\Admin\AppData\Local\Temp\b003fca8539284507976b319201efd5e.exe
"C:\Users\Admin\AppData\Local\Temp\b003fca8539284507976b319201efd5e.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2024
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b003fca8539284507976b319201efd5e.exe" & del "C:\ProgramData\*.dll"" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1444
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 5
    3⤵
    - Delays execution with timeout.exe
    PID:1512

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2024-55-0x00000000003C0000-0x00000000003D6000-memory.dmp

Filesize
88KB

Download
memory/2024-56-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/2024-74-0x0000000000400000-0x0000000001B39000-memory.dmp

Filesize
23.2MB

Download
memory/2024-77-0x0000000000400000-0x0000000001B39000-memory.dmp

Filesize
23.2MB

Download