stealc | b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c

General

Target

b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe
Size

2.2MB
MD5

dd69f4fd6df885583bf64082547d7e2f
SHA1

a3c12997a466124e09b52e9f439f18220dd98438
SHA256

b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c
SHA512

0874fb468981058bf9bc977188c67b2945c8a5c3c07e4d67416164d02a4ecd3ae80e5056a55ab36cf364a6780c55d0ce8ae575132e0c1d0f9ef2b05d27b5b2ab
SSDEEP

49152:qpjNvr9ySAOmw4BHHO+SASagXkJr4MDkUwm:qpjNp7p4BHH8n5A

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/2684-1-0x0000000002BB0000-0x0000000002CC0000-memory.dmp	family_vidar_v7
behavioral2/memory/4528-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4528-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4528-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4528-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4528-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4528-35-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4528-36-0x0000000000400000-0x0000000000648000-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
4528	kat350A.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 2684 set thread context of 4528	2684	b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe	81

Checks processor information in registry 2 TTPs 2 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	kat350A.tmp
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat350A.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4528	kat350A.tmp
4528	kat350A.tmp
4528	kat350A.tmp
4528	kat350A.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2684 wrote to memory of 4528	2684	b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe	81
PID 2684 wrote to memory of 4528	2684	b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe	81
PID 2684 wrote to memory of 4528	2684	b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe	81
PID 2684 wrote to memory of 4528	2684	b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe	81
PID 2684 wrote to memory of 4528	2684	b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe	81
PID 2684 wrote to memory of 4528	2684	b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe	81
PID 2684 wrote to memory of 4528	2684	b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe	81
PID 2684 wrote to memory of 4528	2684	b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe	81

C:\Users\Admin\AppData\Local\Temp\b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe
"C:\Users\Admin\AppData\Local\Temp\b896b08e6f55dc75efa8bfd658911f3cff99a63bf3982159ccc326463ba3054c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2684
- C:\Users\Admin\AppData\Local\Temp\kat350A.tmp
  C:\Users\Admin\AppData\Local\Temp\kat350A.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4528

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat350A.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2684-0-0x0000000002390000-0x0000000002391000-memory.dmp

Filesize
4KB

Download
memory/2684-1-0x0000000002BB0000-0x0000000002CC0000-memory.dmp

Filesize
1.1MB

Download
memory/2684-9-0x0000000000400000-0x0000000000635000-memory.dmp

Filesize
2.2MB

Download
memory/4528-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4528-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4528-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4528-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4528-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4528-27-0x000000002F6F0000-0x000000002F94F000-memory.dmp

Filesize
2.4MB

Download
memory/4528-35-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4528-36-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

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