stealc | f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7

General

Target

f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe
Size

2.5MB
MD5

4fc82f32ea7a68ddb28d9dc0e0b06ce1
SHA1

538cfe9a4c244b7add1f64250a9b569898ed5100
SHA256

f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7
SHA512

d481db849e1b2066327807493bda7fb8783a2a5707f6bc50dbd4417a194f345df63aed8100125c4ed8e36b77cea5e17b056012c888a8fc18d172c9fd3967534b
SSDEEP

49152:+BX5/0mLBI1JVYJtTF+TxMoxc1TU+j+dAzGRX+:+BX5/0mAGtIuoITsdZ

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 13 IoCs

stealer

resource	yara_rule
behavioral1/memory/556-2-0x00000000041E0000-0x000000000432C000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-9-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-24-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-25-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-42-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-43-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-59-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-60-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-71-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-72-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral1/memory/4544-75-0x0000000000400000-0x0000000000649000-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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	kat5AA3.tmp

Executes dropped EXE 1 IoCs

pid	Process
4544	kat5AA3.tmp

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 556 set thread context of 4544	556	f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe	85

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	kat5AA3.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1564	timeout.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\2796BAE63F1801E277261BA0D77770028F20EEE4	kat5AA3.tmp
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\2796BAE63F1801E277261BA0D77770028F20EEE4\Blob = 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	kat5AA3.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4544	kat5AA3.tmp
4544	kat5AA3.tmp
4544	kat5AA3.tmp
4544	kat5AA3.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 556 wrote to memory of 4544	556	f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe	85
PID 556 wrote to memory of 4544	556	f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe	85
PID 556 wrote to memory of 4544	556	f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe	85
PID 556 wrote to memory of 4544	556	f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe	85
PID 556 wrote to memory of 4544	556	f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe	85
PID 556 wrote to memory of 4544	556	f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe	85
PID 556 wrote to memory of 4544	556	f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe	85
PID 556 wrote to memory of 4544	556	f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe	85
PID 4544 wrote to memory of 3956	4544	kat5AA3.tmp	99
PID 4544 wrote to memory of 3956	4544	kat5AA3.tmp	99
PID 4544 wrote to memory of 3956	4544	kat5AA3.tmp	99
PID 3956 wrote to memory of 1564	3956	cmd.exe	101
PID 3956 wrote to memory of 1564	3956	cmd.exe	101
PID 3956 wrote to memory of 1564	3956	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe
"C:\Users\Admin\AppData\Local\Temp\f6bb2ba93b6f1fa3eea5c2cdb4656b21878d18b0b15be2076c5f2c30702002e7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:556
- C:\Users\Admin\AppData\Local\Temp\kat5AA3.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5AA3.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4544
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5AA3.tmp" & rd /s /q "C:\ProgramData\FIIIIDGHJEBF" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3956
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:1564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat5AA3.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/556-2-0x00000000041E0000-0x000000000432C000-memory.dmp

Filesize
1.3MB

Download
memory/556-0-0x0000000000870000-0x0000000000871000-memory.dmp

Filesize
4KB

Download
memory/556-10-0x0000000000400000-0x000000000067C000-memory.dmp

Filesize
2.5MB

Download
memory/4544-25-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-9-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-8-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-24-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-4-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-27-0x0000000025FE0000-0x000000002623F000-memory.dmp

Filesize
2.4MB

Download
memory/4544-42-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-43-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-59-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-60-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-71-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-72-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4544-75-0x0000000000400000-0x0000000000649000-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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