stealc | 726769b2b9ad1d7e84b107c982944aa1335012b2200b46b8197e7eb232c32abd

Analysis

max time kernel
149s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
01/11/2023, 08:55

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General

Target

NEAS.5b391f8b4bf3c7f29e6f0d770b2d04e0_JC.exe
Size

1.1MB
MD5

5b391f8b4bf3c7f29e6f0d770b2d04e0
SHA1

a905c112cf04f41e93c72b009b6d319c086243a7
SHA256

726769b2b9ad1d7e84b107c982944aa1335012b2200b46b8197e7eb232c32abd
SHA512

2cfa8b8ec34c18f80f256150d3f0e1738d822fb042d19ea445e0139b997c572ad874c24347ee0c6df8eaffe9bac21312119bbfc729021c274ae543805fb6e213
SSDEEP

24576:8eh4biccwWcz+9N+gigYb484ecjxJjpZ/BA9:8j4EmZNE

Score

10^/10

stealc discovery stealer

Malware Config

Extracted

Family

stealc

http://tetromask.site

Attributes

url_path
/b5c586aec2e1004c.php

rc4.plain

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
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

Program crash 2 IoCs

pid	pid_target	Process	procid_target
1936	2404	WerFault.exe	86
1488	2404	WerFault.exe	86

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	NEAS.5b391f8b4bf3c7f29e6f0d770b2d04e0_JC.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	NEAS.5b391f8b4bf3c7f29e6f0d770b2d04e0_JC.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2404	NEAS.5b391f8b4bf3c7f29e6f0d770b2d04e0_JC.exe
2404	NEAS.5b391f8b4bf3c7f29e6f0d770b2d04e0_JC.exe

C:\Users\Admin\AppData\Local\Temp\NEAS.5b391f8b4bf3c7f29e6f0d770b2d04e0_JC.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.5b391f8b4bf3c7f29e6f0d770b2d04e0_JC.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2404
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2404 -s 1440
  2⤵
  - Program crash
  PID:1936
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2404 -s 1412
  2⤵
  - Program crash
  PID:1488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 2404 -ip 2404
1⤵
PID:4852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 2404 -ip 2404
1⤵
PID:4356

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

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Downloads

memory/2404-0-0x0000000002270000-0x0000000002271000-memory.dmp

Filesize
4KB

Download
memory/2404-1-0x0000000010000000-0x0000000010121000-memory.dmp

Filesize
1.1MB

Download
memory/2404-2-0x0000000002270000-0x0000000002271000-memory.dmp

Filesize
4KB

Download
memory/2404-3-0x0000000010000000-0x0000000010121000-memory.dmp

Filesize
1.1MB

Download
memory/2404-4-0x0000000002320000-0x000000000234B000-memory.dmp

Filesize
172KB

Download
memory/2404-5-0x0000000010000000-0x000000001022D000-memory.dmp

Filesize
2.2MB

Download
memory/2404-6-0x0000000010000000-0x0000000010121000-memory.dmp

Filesize
1.1MB

Download
memory/2404-7-0x0000000010000000-0x000000001022D000-memory.dmp

Filesize
2.2MB

Download
memory/2404-8-0x0000000010000000-0x0000000010121000-memory.dmp

Filesize
1.1MB

Download
memory/2404-9-0x0000000010000000-0x0000000010121000-memory.dmp

Filesize
1.1MB

Download
memory/2404-10-0x0000000010000000-0x0000000010121000-memory.dmp

Filesize
1.1MB

Download
memory/2404-17-0x0000000010000000-0x000000001022D000-memory.dmp

Filesize
2.2MB

Download