stealc | 555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134

General

Target

555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe
Size

2.1MB
MD5

73de9bf29334ad8a2b6999315725b863
SHA1

cb3978f05f5e5596a2f36bd55d4e19d25abc3f0a
SHA256

555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134
SHA512

8e58064acd09c0510ee20c421d59539076d7ece11791e9575f98e8bf6c176b01b53ed9f9011ffe4e9f5c23ff69ea8df3a9af2cfbc51c7e32b830dccbc2a2dbc2
SSDEEP

49152:N6uDuaS9ref6IJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9fItIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/1448-1-0x00000000040F0000-0x0000000004239000-memory.dmp	family_vidar_v7
behavioral2/memory/952-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/952-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/952-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/952-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/952-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/952-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/952-35-0x0000000000400000-0x0000000000646000-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

Processes:

kat396F.tmp

pid process

952 kat396F.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

pid	process
952	kat396F.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe

description	pid	process	target process
PID 1448 set thread context of 952	1448	555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe	kat396F.tmp

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

Processes:

kat396F.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat396F.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat396F.tmp

pid process

952 kat396F.tmp
952 kat396F.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat396F.tmp

pid	process
952	kat396F.tmp
952	kat396F.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe

description	pid	process	target process
PID 1448 wrote to memory of 952	1448	555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe	kat396F.tmp
PID 1448 wrote to memory of 952	1448	555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe	kat396F.tmp
PID 1448 wrote to memory of 952	1448	555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe	kat396F.tmp
PID 1448 wrote to memory of 952	1448	555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe	kat396F.tmp
PID 1448 wrote to memory of 952	1448	555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe	kat396F.tmp
PID 1448 wrote to memory of 952	1448	555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe	kat396F.tmp
PID 1448 wrote to memory of 952	1448	555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe	kat396F.tmp
PID 1448 wrote to memory of 952	1448	555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe	kat396F.tmp

C:\Users\Admin\AppData\Local\Temp\555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe
"C:\Users\Admin\AppData\Local\Temp\555281f2cb5673a822bbb42166f9e514d78c623fd659cb0ab30d536444ca4134.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1448

C:\Users\Admin\AppData\Local\Temp\kat396F.tmp
C:\Users\Admin\AppData\Local\Temp\kat396F.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:952

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat396F.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/952-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/952-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/952-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/952-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/952-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/952-19-0x0000000019370000-0x00000000195CF000-memory.dmp

Filesize
2.4MB

Download
memory/952-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/952-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1448-0-0x0000000002370000-0x0000000002371000-memory.dmp

Filesize
4KB

Download
memory/1448-1-0x00000000040F0000-0x0000000004239000-memory.dmp

Filesize
1.3MB

Download
memory/1448-6-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads