stealc | 4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806

General

Target

4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe
Size

1.9MB
MD5

6bcfaadd4612cbff8f8c5230519094e6
SHA1

33de0a41a644fefd32313a38dd0782cc3af16ea0
SHA256

4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806
SHA512

a9c0ff98a309f10f64961fe9cb08a64897576302685c6a24bf2f87ec7e0e4ce6f359bc3c386044ab207496c07c108ce9f558d978f5c60aa80cfbf7aec10ec077
SSDEEP

49152:CdKfTn6viJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnZtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

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 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/912-2-0x0000000004050000-0x0000000004199000-memory.dmp	family_vidar_v7
behavioral2/memory/4340-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4340-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4340-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4340-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4340-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4340-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4340-38-0x0000000000400000-0x0000000000646000-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:

kat55B1.tmp

pid process

4340 kat55B1.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
4340	kat55B1.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe

description	pid	process	target process
PID 912 set thread context of 4340	912	4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe	kat55B1.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:

kat55B1.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat55B1.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat55B1.tmp

pid process

4340 kat55B1.tmp
4340 kat55B1.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat55B1.tmp

pid	process
4340	kat55B1.tmp
4340	kat55B1.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe

description	pid	process	target process
PID 912 wrote to memory of 4340	912	4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe	kat55B1.tmp
PID 912 wrote to memory of 4340	912	4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe	kat55B1.tmp
PID 912 wrote to memory of 4340	912	4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe	kat55B1.tmp
PID 912 wrote to memory of 4340	912	4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe	kat55B1.tmp
PID 912 wrote to memory of 4340	912	4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe	kat55B1.tmp
PID 912 wrote to memory of 4340	912	4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe	kat55B1.tmp
PID 912 wrote to memory of 4340	912	4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe	kat55B1.tmp
PID 912 wrote to memory of 4340	912	4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe	kat55B1.tmp

C:\Users\Admin\AppData\Local\Temp\4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe
"C:\Users\Admin\AppData\Local\Temp\4c1980ebb8041f13c222d5cd17d047c915090134013ab272f02818c5161d5806.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:912

C:\Users\Admin\AppData\Local\Temp\kat55B1.tmp
C:\Users\Admin\AppData\Local\Temp\kat55B1.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4340

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat55B1.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/912-0-0x0000000002350000-0x0000000002351000-memory.dmp

Filesize
4KB

Download
memory/912-2-0x0000000004050000-0x0000000004199000-memory.dmp

Filesize
1.3MB

Download
memory/912-10-0x0000000000400000-0x00000000005EC000-memory.dmp

Filesize
1.9MB

Download
memory/4340-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4340-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4340-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4340-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4340-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4340-22-0x0000000026050000-0x00000000262AF000-memory.dmp

Filesize
2.4MB

Download
memory/4340-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4340-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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