stealc | a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733

General

Target

a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe
Size

1.8MB
MD5

22e189acfeaa42090f18eb43f0e769ba
SHA1

7d1d7200a99995e30c06324ed572530b5d489008
SHA256

a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733
SHA512

c706aaa65b654206d07f3c7bd36294c79ce524e051bfd7c7bdcf04ac3bb8c5226738246a23e8c55e2ef4f2cf8ac10457307c8087845c5fed4c223ca955321f89
SSDEEP

24576:FBfuZfeq6sVO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFHJtTF+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
behavioral1/memory/5064-2-0x0000000004020000-0x0000000004169000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3228-36-0x0000000000400000-0x0000000000646000-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
3228	kat43B0.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 5064 set thread context of 3228	5064	a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe	82

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	kat43B0.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3228	kat43B0.tmp
3228	kat43B0.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5064 wrote to memory of 3228	5064	a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe	82
PID 5064 wrote to memory of 3228	5064	a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe	82
PID 5064 wrote to memory of 3228	5064	a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe	82
PID 5064 wrote to memory of 3228	5064	a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe	82
PID 5064 wrote to memory of 3228	5064	a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe	82
PID 5064 wrote to memory of 3228	5064	a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe	82
PID 5064 wrote to memory of 3228	5064	a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe	82
PID 5064 wrote to memory of 3228	5064	a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe	82

C:\Users\Admin\AppData\Local\Temp\a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe
"C:\Users\Admin\AppData\Local\Temp\a565c5ce6df8a1d28a9823a409adea1dee46fdc51ac6ffb1d37b9ce928f3a733.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5064
- C:\Users\Admin\AppData\Local\Temp\kat43B0.tmp
  C:\Users\Admin\AppData\Local\Temp\kat43B0.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3228

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\kat43B0.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3228-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-20-0x000000001DC20000-0x000000001DE7F000-memory.dmp

Filesize
2.4MB

Download
memory/3228-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3228-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5064-0-0x0000000002440000-0x0000000002441000-memory.dmp

Filesize
4KB

Download
memory/5064-2-0x0000000004020000-0x0000000004169000-memory.dmp

Filesize
1.3MB

Download
memory/5064-10-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download

Analysis

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