stealc | 42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e

General

Target

42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe
Size

1.8MB
MD5

9625b09df886dc1ae4bdde144223b622
SHA1

3dcf84351240c8f5771fb3e3f576a32da918a6a3
SHA256

42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e
SHA512

ade9715da4a01936a11765d781d689ec17900dedade3e1cd98729f56d74943cc19c2668928e3ff64e6f1d573fcdd96e51341bcdb5f08e546b892be11fc906c6e
SSDEEP

24576:FBfuZfeq6shO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFrJtTF+TxMoxc1TU+j+dAzGwlrh

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/2784-2-0x00000000041A0000-0x00000000042E9000-memory.dmp	family_vidar_v7
behavioral2/memory/4572-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4572-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4572-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4572-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4572-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4572-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4572-38-0x0000000000400000-0x0000000000646000-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
4572	kat7213.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 2784 set thread context of 4572	2784	42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe	81

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	kat7213.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4572	kat7213.tmp
4572	kat7213.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2784 wrote to memory of 4572	2784	42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe	81
PID 2784 wrote to memory of 4572	2784	42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe	81
PID 2784 wrote to memory of 4572	2784	42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe	81
PID 2784 wrote to memory of 4572	2784	42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe	81
PID 2784 wrote to memory of 4572	2784	42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe	81
PID 2784 wrote to memory of 4572	2784	42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe	81
PID 2784 wrote to memory of 4572	2784	42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe	81
PID 2784 wrote to memory of 4572	2784	42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe	81

C:\Users\Admin\AppData\Local\Temp\42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe
"C:\Users\Admin\AppData\Local\Temp\42526763833c450c4ee261420e97af3a4876468f04aa4de53c8d1dda7338ec2e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2784
- C:\Users\Admin\AppData\Local\Temp\kat7213.tmp
  C:\Users\Admin\AppData\Local\Temp\kat7213.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4572

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\kat7213.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2784-0-0x0000000002450000-0x0000000002451000-memory.dmp

Filesize
4KB

Download
memory/2784-2-0x00000000041A0000-0x00000000042E9000-memory.dmp

Filesize
1.3MB

Download
memory/2784-10-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download
memory/4572-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4572-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4572-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4572-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4572-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4572-22-0x000000001B8F0000-0x000000001BB4F000-memory.dmp

Filesize
2.4MB

Download
memory/4572-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4572-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

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