stealc | cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8

General

Target

cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe
Size

2.4MB
MD5

fa3b69af927ad405668e5b2d569d7e66
SHA1

9a9a881571dc2e8fcb0e20608e5c92d209d02ce2
SHA256

cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8
SHA512

9d56aa149dd437d2dff73272f7d0f32ef2cf877723774e551d38f24abea0fabf5ba41d0d009928fc49102928a0694e9bab4ef2240d71311ffc87f9bb2248ffe7
SSDEEP

49152:wQc81KnB/a/hNT/dRYa8aesY3Ot4N7G/:wDta/hNT/dRn0etD/

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 14 IoCs

stealer

resource	yara_rule
behavioral2/memory/1912-2-0x0000000004120000-0x000000000426C000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-9-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-24-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-25-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-42-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-43-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-59-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-60-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-71-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-72-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-73-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/3124-74-0x0000000000400000-0x0000000000649000-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
3124	kat8462.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 1912 set thread context of 3124	1912	cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe	80

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	kat8462.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4232	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3124	kat8462.tmp
3124	kat8462.tmp
3124	kat8462.tmp
3124	kat8462.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1912 wrote to memory of 3124	1912	cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe	80
PID 1912 wrote to memory of 3124	1912	cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe	80
PID 1912 wrote to memory of 3124	1912	cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe	80
PID 1912 wrote to memory of 3124	1912	cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe	80
PID 1912 wrote to memory of 3124	1912	cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe	80
PID 1912 wrote to memory of 3124	1912	cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe	80
PID 1912 wrote to memory of 3124	1912	cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe	80
PID 1912 wrote to memory of 3124	1912	cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe	80
PID 3124 wrote to memory of 4088	3124	kat8462.tmp	83
PID 3124 wrote to memory of 4088	3124	kat8462.tmp	83
PID 3124 wrote to memory of 4088	3124	kat8462.tmp	83
PID 4088 wrote to memory of 4232	4088	cmd.exe	85
PID 4088 wrote to memory of 4232	4088	cmd.exe	85
PID 4088 wrote to memory of 4232	4088	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe
"C:\Users\Admin\AppData\Local\Temp\cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Users\Admin\AppData\Local\Temp\kat8462.tmp
  C:\Users\Admin\AppData\Local\Temp\kat8462.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3124
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat8462.tmp" & rd /s /q "C:\ProgramData\BKFCAFCFBAEH" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4088
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4232

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\kat8462.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1912-2-0x0000000004120000-0x000000000426C000-memory.dmp

Filesize
1.3MB

Download
memory/1912-0-0x0000000000930000-0x0000000000931000-memory.dmp

Filesize
4KB

Download
memory/1912-10-0x0000000000400000-0x0000000000663000-memory.dmp

Filesize
2.4MB

Download
memory/3124-25-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-43-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-9-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-24-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-4-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-27-0x000000001B8A0000-0x000000001BAFF000-memory.dmp

Filesize
2.4MB

Download
memory/3124-42-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-8-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-59-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-60-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-71-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-72-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-73-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/3124-74-0x0000000000400000-0x0000000000649000-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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Downloads