stealc | 40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78

General

Target

40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe
Size

1.6MB
MD5

12c9a17190249d0a63c3780e0322c77c
SHA1

e2f2b499a9279d4ee2756b589abe82b0e4be0f05
SHA256

40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78
SHA512

9b5babc8d9b30d60be9c31abb3318a848d7ff3182de4c8858e6071afcf60c4fb0348d186613d14d4e747d9eb4870bd24ddd90b1efeb4e38217255ea93964b94d
SSDEEP

24576:spM5863IGfTAVpalBSUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BSUkxVVChjHZQs

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 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/3560-1-0x0000000003F70000-0x0000000004080000-memory.dmp	family_vidar_v7
behavioral2/memory/1556-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1556-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1556-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1556-15-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1556-16-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1556-33-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1556-34-0x0000000000400000-0x0000000000648000-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
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

kat4DB2.tmp

pid process

1556 kat4DB2.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
1556	kat4DB2.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe

description	pid	process	target process
PID 3560 set thread context of 1556	3560	40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe	kat4DB2.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:

kat4DB2.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4DB2.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4DB2.tmp

pid process

1556 kat4DB2.tmp
1556 kat4DB2.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4DB2.tmp

pid	process
1556	kat4DB2.tmp
1556	kat4DB2.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe

description	pid	process	target process
PID 3560 wrote to memory of 1556	3560	40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe	kat4DB2.tmp
PID 3560 wrote to memory of 1556	3560	40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe	kat4DB2.tmp
PID 3560 wrote to memory of 1556	3560	40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe	kat4DB2.tmp
PID 3560 wrote to memory of 1556	3560	40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe	kat4DB2.tmp
PID 3560 wrote to memory of 1556	3560	40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe	kat4DB2.tmp
PID 3560 wrote to memory of 1556	3560	40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe	kat4DB2.tmp
PID 3560 wrote to memory of 1556	3560	40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe	kat4DB2.tmp
PID 3560 wrote to memory of 1556	3560	40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe	kat4DB2.tmp

C:\Users\Admin\AppData\Local\Temp\40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe
"C:\Users\Admin\AppData\Local\Temp\40d5b24890739563ee9f89944d86f561c817a36a11d6cc0d1d0e44b9062e7e78.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3560

C:\Users\Admin\AppData\Local\Temp\kat4DB2.tmp
C:\Users\Admin\AppData\Local\Temp\kat4DB2.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1556

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

2

T1012

System Information Discovery

1

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\kat4DB2.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1556-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1556-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1556-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1556-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1556-16-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1556-18-0x00000000193A0000-0x00000000195FF000-memory.dmp

Filesize
2.4MB

Download
memory/1556-33-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1556-34-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3560-0-0x0000000002300000-0x0000000002301000-memory.dmp

Filesize
4KB

Download
memory/3560-1-0x0000000003F70000-0x0000000004080000-memory.dmp

Filesize
1.1MB

Download
memory/3560-9-0x0000000000400000-0x0000000000594000-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