stealc | cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0

General

Target

cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe
Size

2.6MB
MD5

318ab6a41fd3336d83ce21fdbc710af0
SHA1

6f76844eafce84321347bf6397c48c1f1e554323
SHA256

cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0
SHA512

9322a89b1aedee961d1323a8e697feb05663aca140bf384f958d998887eaf0a5ea685eb300c4933b7dc0f050f2802b8214d1e1fdbeae115aa482f046b072ea35
SSDEEP

49152:XQzIzMiqCNw3JtTF+TxMoxc1TU+j+dAzGwlrh:XY598etIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

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
behavioral1/memory/2732-1-0x00000000040A0000-0x00000000041E9000-memory.dmp	family_vidar_v7
behavioral1/memory/3312-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3312-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3312-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3312-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3312-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3312-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3312-38-0x0000000000400000-0x0000000000646000-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
3312	kat3FB8.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 2732 set thread context of 3312	2732	cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe	84

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	kat3FB8.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3312	kat3FB8.tmp
3312	kat3FB8.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2732 wrote to memory of 3312	2732	cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe	84
PID 2732 wrote to memory of 3312	2732	cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe	84
PID 2732 wrote to memory of 3312	2732	cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe	84
PID 2732 wrote to memory of 3312	2732	cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe	84
PID 2732 wrote to memory of 3312	2732	cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe	84
PID 2732 wrote to memory of 3312	2732	cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe	84
PID 2732 wrote to memory of 3312	2732	cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe	84
PID 2732 wrote to memory of 3312	2732	cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe	84

C:\Users\Admin\AppData\Local\Temp\cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe
"C:\Users\Admin\AppData\Local\Temp\cf8921f0d7c1d06f63d6d79c3951c740245a139e753ed52576c9a61586389af0.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2732
- C:\Users\Admin\AppData\Local\Temp\kat3FB8.tmp
  C:\Users\Admin\AppData\Local\Temp\kat3FB8.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3312

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\kat3FB8.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2732-0-0x00000000023F0000-0x00000000023F1000-memory.dmp

Filesize
4KB

Download
memory/2732-1-0x00000000040A0000-0x00000000041E9000-memory.dmp

Filesize
1.3MB

Download
memory/2732-10-0x0000000000400000-0x000000000069E000-memory.dmp

Filesize
2.6MB

Download
memory/3312-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3312-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3312-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3312-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3312-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3312-22-0x000000001B7E0000-0x000000001BA3F000-memory.dmp

Filesize
2.4MB

Download
memory/3312-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3312-38-0x0000000000400000-0x0000000000646000-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