stealc | 98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b

General

Target

98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe
Size

2.0MB
MD5

e0a64ce738c511638a9daaf1c9049475
SHA1

30c3234419fcd5489ef6a6eb2310ed1441de9c44
SHA256

98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b
SHA512

4970812501ea327631f5930005c918bd464bc0d40d953db92065826287d2afaad82ff5196952f444939ef14508d7f371f1affd63bf7340c466ec0fbae7d36334
SSDEEP

49152:7QzHt472DmJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtItIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 13 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/4688-1-0x0000000004030000-0x0000000004179000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-38-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-54-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-55-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-66-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-67-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4384-70-0x0000000000400000-0x0000000000646000-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:

kat4EEB.tmp

pid process

4384 kat4EEB.tmp
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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
4384	kat4EEB.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe

description	pid	process	target process
PID 4688 set thread context of 4384	4688	98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe	kat4EEB.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
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:

kat4EEB.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4EEB.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

5048 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat4EEB.tmp

pid process

4384 kat4EEB.tmp
4384 kat4EEB.tmp
4384 kat4EEB.tmp
4384 kat4EEB.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4EEB.tmp

pid	process
5048	timeout.exe

pid	process
4384	kat4EEB.tmp
4384	kat4EEB.tmp
4384	kat4EEB.tmp
4384	kat4EEB.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exekat4EEB.tmpcmd.exe

description	pid	process	target process
PID 4688 wrote to memory of 4384	4688	98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe	kat4EEB.tmp
PID 4688 wrote to memory of 4384	4688	98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe	kat4EEB.tmp
PID 4688 wrote to memory of 4384	4688	98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe	kat4EEB.tmp
PID 4688 wrote to memory of 4384	4688	98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe	kat4EEB.tmp
PID 4688 wrote to memory of 4384	4688	98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe	kat4EEB.tmp
PID 4688 wrote to memory of 4384	4688	98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe	kat4EEB.tmp
PID 4688 wrote to memory of 4384	4688	98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe	kat4EEB.tmp
PID 4688 wrote to memory of 4384	4688	98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe	kat4EEB.tmp
PID 4384 wrote to memory of 2084	4384	kat4EEB.tmp	cmd.exe
PID 4384 wrote to memory of 2084	4384	kat4EEB.tmp	cmd.exe
PID 4384 wrote to memory of 2084	4384	kat4EEB.tmp	cmd.exe
PID 2084 wrote to memory of 5048	2084	cmd.exe	timeout.exe
PID 2084 wrote to memory of 5048	2084	cmd.exe	timeout.exe
PID 2084 wrote to memory of 5048	2084	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe
"C:\Users\Admin\AppData\Local\Temp\98548553b0f07b01c917a3c94f3dc88ebcd856b7c7b6ef1cd1c51051f83efc6b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4688

C:\Users\Admin\AppData\Local\Temp\kat4EEB.tmp
C:\Users\Admin\AppData\Local\Temp\kat4EEB.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4384

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat4EEB.tmp" & rd /s /q "C:\ProgramData\EHJDHJKFIECA" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:2084

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:5048

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

4

T1552

Credentials In Files

4

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat4EEB.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4384-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-23-0x0000000026040000-0x000000002629F000-memory.dmp

Filesize
2.4MB

Download
memory/4384-70-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-67-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-66-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-54-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4384-55-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4688-0-0x0000000002360000-0x0000000002361000-memory.dmp

Filesize
4KB

Download
memory/4688-1-0x0000000004030000-0x0000000004179000-memory.dmp

Filesize
1.3MB

Download
memory/4688-10-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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