stealc | 87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62

General

Target

87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe
Size

1.6MB
MD5

e12407f6a87c81f0e83f35c07e4c4df2
SHA1

fec482ef39ad4930f24d69fec75cd07ad49aad92
SHA256

87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62
SHA512

b2d64c33074afacbf006dd53afa8df6ec412c7a02faab993949c0bdc4a7a4fadfd67d83ee30f03648f1fe83faf0936961354720ebf6e65a189a54c1f8f5c8d79
SSDEEP

24576:spM5863IGfTAVpalB5UfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6B5UkxVVChjHZQs

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/4904-1-0x00000000040B0000-0x00000000041C0000-memory.dmp	family_vidar_v7
behavioral1/memory/2744-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2744-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2744-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2744-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2744-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2744-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2744-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/2744-15-0x0000000000400000-0x0000000000648000-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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

kat4A76.tmp

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	kat4A76.tmp

Executes dropped EXE 1 IoCs

Processes:

kat4A76.tmp

pid process

2744 kat4A76.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
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
2744	kat4A76.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe

description	pid	process	target process
PID 4904 set thread context of 2744	4904	87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe	kat4A76.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:

kat4A76.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4A76.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2156 timeout.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4A76.tmp

pid process

2744 kat4A76.tmp
2744 kat4A76.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4A76.tmp

pid	process
2156	timeout.exe

pid	process
2744	kat4A76.tmp
2744	kat4A76.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exekat4A76.tmpcmd.exe

description	pid	process	target process
PID 4904 wrote to memory of 2744	4904	87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe	kat4A76.tmp
PID 4904 wrote to memory of 2744	4904	87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe	kat4A76.tmp
PID 4904 wrote to memory of 2744	4904	87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe	kat4A76.tmp
PID 4904 wrote to memory of 2744	4904	87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe	kat4A76.tmp
PID 4904 wrote to memory of 2744	4904	87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe	kat4A76.tmp
PID 4904 wrote to memory of 2744	4904	87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe	kat4A76.tmp
PID 4904 wrote to memory of 2744	4904	87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe	kat4A76.tmp
PID 4904 wrote to memory of 2744	4904	87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe	kat4A76.tmp
PID 2744 wrote to memory of 5028	2744	kat4A76.tmp	cmd.exe
PID 2744 wrote to memory of 5028	2744	kat4A76.tmp	cmd.exe
PID 2744 wrote to memory of 5028	2744	kat4A76.tmp	cmd.exe
PID 5028 wrote to memory of 2156	5028	cmd.exe	timeout.exe
PID 5028 wrote to memory of 2156	5028	cmd.exe	timeout.exe
PID 5028 wrote to memory of 2156	5028	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe
"C:\Users\Admin\AppData\Local\Temp\87488962f74b9a143fda08c3692c7a5aea65283a3bd90b16d6122437e4c5df62.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4904

C:\Users\Admin\AppData\Local\Temp\kat4A76.tmp
C:\Users\Admin\AppData\Local\Temp\kat4A76.tmp
2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2744

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat4A76.tmp" & rd /s /q "C:\ProgramData\EBGCFBGCBFHJ" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:5028

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:2156

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

3

T1012

System Information Discovery

3

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\kat4A76.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2744-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2744-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2744-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2744-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2744-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2744-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2744-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2744-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4904-0-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download
memory/4904-1-0x00000000040B0000-0x00000000041C0000-memory.dmp

Filesize
1.1MB

Download
memory/4904-10-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads