stealc | 41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea

General

Target

41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe
Size

2.0MB
MD5

27357e6724bcff676779325f6425386c
SHA1

0a9d9a5270cbef8b5e2d06289266761dfe3a4110
SHA256

41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea
SHA512

b3cd6c2b80218b3dab3902fde2f0b1d3ea8202f27b573dac5c03e3b57cb9c610d1a551a4edbb72a0b162fa61b194a37a5f4d1d112baa64cadc54c8777a12050c
SSDEEP

49152:s4K3x1vUKJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18KtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/1124-2-0x0000000004040000-0x0000000004189000-memory.dmp	family_vidar_v7
behavioral1/memory/4988-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4988-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4988-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4988-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4988-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4988-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4988-33-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

katF78F.tmp

pid process

4988 katF78F.tmp
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
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

pid	process
4988	katF78F.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe

description	pid	process	target process
PID 1124 set thread context of 4988	1124	41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe	katF78F.tmp

Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

katF78F.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString katF78F.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

katF78F.tmp

pid process

4988 katF78F.tmp
4988 katF78F.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	katF78F.tmp

pid	process
4988	katF78F.tmp
4988	katF78F.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe

description	pid	process	target process
PID 1124 wrote to memory of 4988	1124	41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe	katF78F.tmp
PID 1124 wrote to memory of 4988	1124	41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe	katF78F.tmp
PID 1124 wrote to memory of 4988	1124	41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe	katF78F.tmp
PID 1124 wrote to memory of 4988	1124	41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe	katF78F.tmp
PID 1124 wrote to memory of 4988	1124	41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe	katF78F.tmp
PID 1124 wrote to memory of 4988	1124	41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe	katF78F.tmp
PID 1124 wrote to memory of 4988	1124	41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe	katF78F.tmp
PID 1124 wrote to memory of 4988	1124	41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe	katF78F.tmp

C:\Users\Admin\AppData\Local\Temp\41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe
"C:\Users\Admin\AppData\Local\Temp\41b0bedd80712ffb926aa61685245d95d60c1458122f572ef66787e854cd5bea.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1124
- C:\Users\Admin\AppData\Local\Temp\katF78F.tmp
  C:\Users\Admin\AppData\Local\Temp\katF78F.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4988

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 --field-trial-handle=4320,i,13879737908471496610,15335851594401413307,262144 --variations-seed-version --mojo-platform-channel-handle=4296 /prefetch:8
1⤵
PID:3932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\katF78F.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1124-0-0x00000000007D0000-0x00000000007D1000-memory.dmp

Filesize
4KB

Download
memory/1124-2-0x0000000004040000-0x0000000004189000-memory.dmp

Filesize
1.3MB

Download
memory/1124-10-0x0000000000400000-0x000000000060C000-memory.dmp

Filesize
2.0MB

Download
memory/4988-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4988-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4988-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4988-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4988-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4988-17-0x000000001DBE0000-0x000000001DE3F000-memory.dmp

Filesize
2.4MB

Download
memory/4988-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4988-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads