stealc | 8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3

General

Target

8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe
Size

2.5MB
MD5

0ff7f760775afefb1c329f3cc5f0cf92
SHA1

b7c5863ff1c7123b5874895dce4e1ed62fbdd634
SHA256

8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3
SHA512

abbcf7c82a6a84b58c0f3076040a7fddcc972930857cef7e38c0952d91d32923305611d2bb7c34b1c2a37ab3e44f8d852f1b11cbde833fc47005513cd1d6f11b
SSDEEP

49152:Zcm4081qpZBUbHEmJgsEAQACR07Q3byRD8aXY658:ZcmmqvBUbHtmfAw07QLyLn

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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
behavioral2/memory/4584-1-0x00000000040B0000-0x0000000004213000-memory.dmp	family_vidar_v7
behavioral2/memory/1896-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1896-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1896-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1896-15-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1896-16-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1896-33-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1896-34-0x0000000000400000-0x0000000000648000-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
1896	kat58DE.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 4584 set thread context of 1896	4584	8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe	78

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	kat58DE.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1896	kat58DE.tmp
1896	kat58DE.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4584 wrote to memory of 1896	4584	8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe	78
PID 4584 wrote to memory of 1896	4584	8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe	78
PID 4584 wrote to memory of 1896	4584	8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe	78
PID 4584 wrote to memory of 1896	4584	8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe	78
PID 4584 wrote to memory of 1896	4584	8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe	78
PID 4584 wrote to memory of 1896	4584	8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe	78
PID 4584 wrote to memory of 1896	4584	8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe	78
PID 4584 wrote to memory of 1896	4584	8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe	78

C:\Users\Admin\AppData\Local\Temp\8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe
"C:\Users\Admin\AppData\Local\Temp\8c928a639f79d717c58828ff07a6065dfb87dd137dfad0f373a24140047fa9e3.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4584
- C:\Users\Admin\AppData\Local\Temp\kat58DE.tmp
  C:\Users\Admin\AppData\Local\Temp\kat58DE.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1896

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\kat58DE.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1896-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1896-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1896-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1896-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1896-16-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1896-19-0x00000000193F0000-0x000000001964F000-memory.dmp

Filesize
2.4MB

Download
memory/1896-33-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1896-34-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4584-0-0x00000000023B0000-0x00000000023B1000-memory.dmp

Filesize
4KB

Download
memory/4584-1-0x00000000040B0000-0x0000000004213000-memory.dmp

Filesize
1.4MB

Download
memory/4584-10-0x0000000000400000-0x000000000067A000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads