stealc | d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483

General

Target

d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe
Size

1.9MB
MD5

8d9019e8d5c7f65b3e7a7b3678e6e300
SHA1

71ceacc395c39eabbda5d612e897b734c6be96ae
SHA256

d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483
SHA512

393abc6004c421bf879d495d55fb1155868cf2aac47a831ef2e6add252176b627ab3efde73eaffd7707ff678b3fb8cba94f49c9c2d54c4acbe63d29f6b781f19
SSDEEP

49152:CdKfTn6vGJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnNtIuoITsdZ

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
behavioral1/memory/3544-2-0x0000000004150000-0x0000000004299000-memory.dmp	family_vidar_v7
behavioral1/memory/3648-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3648-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3648-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3648-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3648-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3648-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3648-38-0x0000000000400000-0x0000000000646000-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:

kat2F6C.tmp

pid process

3648 kat2F6C.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
3648	kat2F6C.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe

description	pid	process	target process
PID 3544 set thread context of 3648	3544	d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe	kat2F6C.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:

kat2F6C.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat2F6C.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat2F6C.tmp

pid process

3648 kat2F6C.tmp
3648 kat2F6C.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat2F6C.tmp

pid	process
3648	kat2F6C.tmp
3648	kat2F6C.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe

description	pid	process	target process
PID 3544 wrote to memory of 3648	3544	d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe	kat2F6C.tmp
PID 3544 wrote to memory of 3648	3544	d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe	kat2F6C.tmp
PID 3544 wrote to memory of 3648	3544	d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe	kat2F6C.tmp
PID 3544 wrote to memory of 3648	3544	d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe	kat2F6C.tmp
PID 3544 wrote to memory of 3648	3544	d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe	kat2F6C.tmp
PID 3544 wrote to memory of 3648	3544	d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe	kat2F6C.tmp
PID 3544 wrote to memory of 3648	3544	d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe	kat2F6C.tmp
PID 3544 wrote to memory of 3648	3544	d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe	kat2F6C.tmp

C:\Users\Admin\AppData\Local\Temp\d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe
"C:\Users\Admin\AppData\Local\Temp\d5b03a7a0167f3dd37c40c59ea3039d43645a71c67e9e2918fe181b5661c8483.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3544

C:\Users\Admin\AppData\Local\Temp\kat2F6C.tmp
C:\Users\Admin\AppData\Local\Temp\kat2F6C.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3648

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\kat2F6C.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3544-0-0x0000000002380000-0x0000000002381000-memory.dmp

Filesize
4KB

Download
memory/3544-2-0x0000000004150000-0x0000000004299000-memory.dmp

Filesize
1.3MB

Download
memory/3544-10-0x0000000000400000-0x00000000005EC000-memory.dmp

Filesize
1.9MB

Download
memory/3648-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3648-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3648-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3648-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3648-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3648-22-0x0000000025F70000-0x00000000261CF000-memory.dmp

Filesize
2.4MB

Download
memory/3648-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3648-38-0x0000000000400000-0x0000000000646000-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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Downloads