stealc | e258ea5af7ad546989cff72758eb179dc37cd65bd15a378b4cfbf553994c7010

General

Target

toolspub5.exe
Size

291KB
MD5

29f3989b7444d45b49d6ad91f3d20515
SHA1

0e399a69674d3f98c04058fda5dbdad567c5470d
SHA256

e258ea5af7ad546989cff72758eb179dc37cd65bd15a378b4cfbf553994c7010
SHA512

27b8cc84aefcf6dac70bcb69fb6678eabe437f3a0b66eda37f7fcfc007e49c0cd44bd7ce33b1f47ae9156efdeaffebdbbe6e737b3eb29ca3f04815d7db998c77
SSDEEP

6144:0KuM4pVUTppny8SXuzvbhQJyR33pz3Ut/w:XUVUlpnaebhQMJApw

Score

10^/10

stealc discovery spyware stealer

Malware Config

Extracted

Family

stealc

C2

http://okkolus.com

Attributes

url_path
/cf5cbdf706840b3f.php

Signatures

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Downloads MZ/PE file
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001
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 1 IoCs

pid	pid_target	Process	procid_target
1144	4616	WerFault.exe	90

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	toolspub5.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	toolspub5.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe
4616	toolspub5.exe

C:\Users\Admin\AppData\Local\Temp\toolspub5.exe
"C:\Users\Admin\AppData\Local\Temp\toolspub5.exe"
1⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4616
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4616 -s 772
  2⤵
  - Program crash
  PID:1144

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=3492 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:3
1⤵
PID:540

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1400 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:4040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4616 -ip 4616
1⤵
PID:4824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports

Filesize
2B

MD5
d751713988987e9331980363e24189ce

SHA1
97d170e1550eee4afc0af065b78cda302a97674c

SHA256
4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

SHA512
b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries

Filesize
40B

MD5
20d4b8fa017a12a108c87f540836e250

SHA1
1ac617fac131262b6d3ce1f52f5907e31d5f6f00

SHA256
6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d

SHA512
507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

Download Submit
memory/4616-61-0x0000000002F80000-0x0000000002FA7000-memory.dmp

Filesize
156KB

Download
memory/4616-63-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4616-5-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/4616-3-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4616-50-0x0000000000400000-0x0000000002B06000-memory.dmp

Filesize
39.0MB

Download
memory/4616-60-0x0000000002C80000-0x0000000002D80000-memory.dmp

Filesize
1024KB

Download
memory/4616-1-0x0000000002C80000-0x0000000002D80000-memory.dmp

Filesize
1024KB

Download
memory/4616-4-0x0000000000400000-0x0000000002B06000-memory.dmp

Filesize
39.0MB

Download
memory/4616-2-0x0000000002F80000-0x0000000002FA7000-memory.dmp

Filesize
156KB

Download
memory/4616-62-0x0000000000400000-0x0000000002B06000-memory.dmp

Filesize
39.0MB

Download
memory/4616-76-0x0000000000400000-0x0000000002B06000-memory.dmp

Filesize
39.0MB

Download
memory/4616-81-0x0000000000400000-0x0000000002B06000-memory.dmp

Filesize
39.0MB

Download
memory/4616-84-0x0000000000400000-0x000000000063B000-memory.dmp

Filesize
2.2MB

Download
memory/4616-83-0x0000000000400000-0x0000000002B06000-memory.dmp

Filesize
39.0MB

Download

Analysis

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