stealc | f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca

General

Target

f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe
Size

2.0MB
MD5

ebb567520e63719e70a1dd8bb117ec49
SHA1

d2e104c2cdab97b0e7f50535a2692bfb1811b1b5
SHA256

f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca
SHA512

787b1fa13926b0119b4319c040400c374b808d3c2e4685d8ee6e2220fe37cbc0afedefbbda43476632f1f7ad75e7ea7ddf4fee1f818823b9102f7b275a40bc78
SSDEEP

49152:7QzHt472DxJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtztIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 14 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/1964-1-0x00000000041E0000-0x0000000004329000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-38-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-54-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-55-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-66-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-67-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-68-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3416-69-0x0000000000400000-0x0000000000646000-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:

kat61B7.tmp

pid process

3416 kat61B7.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
3416	kat61B7.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe

description	pid	process	target process
PID 1964 set thread context of 3416	1964	f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe	kat61B7.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:

kat61B7.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat61B7.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4632 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat61B7.tmp

pid process

3416 kat61B7.tmp
3416 kat61B7.tmp
3416 kat61B7.tmp
3416 kat61B7.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat61B7.tmp

pid	process
4632	timeout.exe

pid	process
3416	kat61B7.tmp
3416	kat61B7.tmp
3416	kat61B7.tmp
3416	kat61B7.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exekat61B7.tmpcmd.exe

description	pid	process	target process
PID 1964 wrote to memory of 3416	1964	f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe	kat61B7.tmp
PID 1964 wrote to memory of 3416	1964	f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe	kat61B7.tmp
PID 1964 wrote to memory of 3416	1964	f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe	kat61B7.tmp
PID 1964 wrote to memory of 3416	1964	f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe	kat61B7.tmp
PID 1964 wrote to memory of 3416	1964	f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe	kat61B7.tmp
PID 1964 wrote to memory of 3416	1964	f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe	kat61B7.tmp
PID 1964 wrote to memory of 3416	1964	f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe	kat61B7.tmp
PID 1964 wrote to memory of 3416	1964	f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe	kat61B7.tmp
PID 3416 wrote to memory of 3084	3416	kat61B7.tmp	cmd.exe
PID 3416 wrote to memory of 3084	3416	kat61B7.tmp	cmd.exe
PID 3416 wrote to memory of 3084	3416	kat61B7.tmp	cmd.exe
PID 3084 wrote to memory of 4632	3084	cmd.exe	timeout.exe
PID 3084 wrote to memory of 4632	3084	cmd.exe	timeout.exe
PID 3084 wrote to memory of 4632	3084	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe
"C:\Users\Admin\AppData\Local\Temp\f3762122a80ea2c13c7bba845ec8cf682c138640110c997d4a399a07f35509ca.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1964

C:\Users\Admin\AppData\Local\Temp\kat61B7.tmp
C:\Users\Admin\AppData\Local\Temp\kat61B7.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3416

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat61B7.tmp" & rd /s /q "C:\ProgramData\CFHIIEHJKKEC" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:3084

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:4632

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\kat61B7.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1964-9-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/1964-1-0x00000000041E0000-0x0000000004329000-memory.dmp

Filesize
1.3MB

Download
memory/1964-0-0x00000000025B0000-0x00000000025B1000-memory.dmp

Filesize
4KB

Download
memory/3416-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-22-0x00000000260E0000-0x000000002633F000-memory.dmp

Filesize
2.4MB

Download
memory/3416-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-54-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-55-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-66-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-67-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-68-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3416-69-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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