stealc | 6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f

General

Target

6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe
Size

2.4MB
MD5

8aa920983ed85eb43cd8151d61ee688c
SHA1

c2f734dc1f3d550278c882d8d3ef3394a7eb7350
SHA256

6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f
SHA512

af50a1b0f9f6aa4d7eae21d0d9eaeeb8e533064f0017812b3f30c05204729dabcf8fc552676de2dac03e3b6f8ebc621927a5ee0a9fe17607a1b9c20f57a25538
SSDEEP

49152:wQc81KnB/a/hNT/dVYa8aesY3Ot4N7G/:wDta/hNT/dVn0etD/

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

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

resource	yara_rule
behavioral1/memory/5036-2-0x0000000002B50000-0x0000000002C9C000-memory.dmp	family_vidar_v7
behavioral1/memory/2956-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2956-9-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2956-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2956-22-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2956-23-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2956-40-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/2956-41-0x0000000000400000-0x0000000000649000-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

pid	Process
2956	kat4546.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5036 set thread context of 2956	5036	6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe	83

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4546.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2956	kat4546.tmp
2956	kat4546.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5036 wrote to memory of 2956	5036	6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe	83
PID 5036 wrote to memory of 2956	5036	6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe	83
PID 5036 wrote to memory of 2956	5036	6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe	83
PID 5036 wrote to memory of 2956	5036	6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe	83
PID 5036 wrote to memory of 2956	5036	6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe	83
PID 5036 wrote to memory of 2956	5036	6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe	83
PID 5036 wrote to memory of 2956	5036	6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe	83
PID 5036 wrote to memory of 2956	5036	6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe	83

C:\Users\Admin\AppData\Local\Temp\6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe
"C:\Users\Admin\AppData\Local\Temp\6f8d9c394f3fbc78896c03113187877559b1cb03dc89e26dff17a9045d01325f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5036
- C:\Users\Admin\AppData\Local\Temp\kat4546.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4546.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2956

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\kat4546.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2956-8-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2956-9-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2956-4-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2956-22-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2956-23-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2956-25-0x000000001B860000-0x000000001BABF000-memory.dmp

Filesize
2.4MB

Download
memory/2956-40-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2956-41-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/5036-0-0x00000000022C0000-0x00000000022C1000-memory.dmp

Filesize
4KB

Download
memory/5036-2-0x0000000002B50000-0x0000000002C9C000-memory.dmp

Filesize
1.3MB

Download
memory/5036-10-0x0000000000400000-0x0000000000663000-memory.dmp

Filesize
2.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads