stealc | 4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36

General

Target

4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe
Size

2.4MB
MD5

094a6ae09aa8ab7f6f579078a625c37b
SHA1

c93a580b054fe3f99cb948ad055791b05b3e0161
SHA256

4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36
SHA512

a2d45f39c71464da9d38129cb89a16fcc36133920ef7a94bb1a1a3a914b9ef3a1f186ac8572d010305e7817fced24129b53eb74a2bedd3256c20e482789f53e7
SSDEEP

49152:wQc81KnB/a/hNT/ddYa8aesY3Ot4N7G/:wDta/hNT/ddn0etD/

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
behavioral2/memory/4748-1-0x0000000004110000-0x000000000425C000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-9-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-24-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-25-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-42-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-43-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-59-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-60-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-71-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-72-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2664-75-0x0000000000400000-0x0000000000649000-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

Executes dropped EXE 1 IoCs

pid	Process
2664	kat804C.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 4748 set thread context of 2664	4748	4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe	77

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	kat804C.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1240	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2664	kat804C.tmp
2664	kat804C.tmp
2664	kat804C.tmp
2664	kat804C.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4748 wrote to memory of 2664	4748	4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe	77
PID 4748 wrote to memory of 2664	4748	4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe	77
PID 4748 wrote to memory of 2664	4748	4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe	77
PID 4748 wrote to memory of 2664	4748	4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe	77
PID 4748 wrote to memory of 2664	4748	4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe	77
PID 4748 wrote to memory of 2664	4748	4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe	77
PID 4748 wrote to memory of 2664	4748	4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe	77
PID 4748 wrote to memory of 2664	4748	4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe	77
PID 2664 wrote to memory of 2140	2664	kat804C.tmp	79
PID 2664 wrote to memory of 2140	2664	kat804C.tmp	79
PID 2664 wrote to memory of 2140	2664	kat804C.tmp	79
PID 2140 wrote to memory of 1240	2140	cmd.exe	81
PID 2140 wrote to memory of 1240	2140	cmd.exe	81
PID 2140 wrote to memory of 1240	2140	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe
"C:\Users\Admin\AppData\Local\Temp\4147e2a5037f25db80aa637a2cc733e2edb67d948970bafbced9afba5a848e36.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4748
- C:\Users\Admin\AppData\Local\Temp\kat804C.tmp
  C:\Users\Admin\AppData\Local\Temp\kat804C.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2664
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat804C.tmp" & rd /s /q "C:\ProgramData\ECGHCBGCBFHI" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2140
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:1240

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

2

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\kat804C.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2664-25-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-43-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-4-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-8-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-75-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-9-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-72-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-42-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-29-0x00000000260D0000-0x000000002632F000-memory.dmp

Filesize
2.4MB

Download
memory/2664-71-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-24-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-59-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/2664-60-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/4748-0-0x00000000024A0000-0x00000000024A1000-memory.dmp

Filesize
4KB

Download
memory/4748-1-0x0000000004110000-0x000000000425C000-memory.dmp

Filesize
1.3MB

Download
memory/4748-10-0x0000000000400000-0x0000000000663000-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