stealc | 46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa

General

Target

46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe
Size

1.8MB
MD5

94a4583880969260fb8e126274b26d45
SHA1

cf022ae6cc8e523e851d15e84df0d32253160fff
SHA256

46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa
SHA512

679e3b3b083ed2fefb2c7e14ec7a85c834c4e5ec1991326cb495454892f37abd7d9105c9bfab35bd0b7f175520e9aab739d80dde3728727c95f10421b9d958af
SSDEEP

24576:FBfuZfeq6sRO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qF7JtTF+TxMoxc1TU+j+dAzGwlrh

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/748-2-0x0000000004000000-0x0000000004149000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2916-33-0x0000000000400000-0x0000000000646000-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:

kat4508.tmp

pid process

2916 kat4508.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
2916	kat4508.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe

description	pid	process	target process
PID 748 set thread context of 2916	748	46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe	kat4508.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:

kat4508.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4508.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4508.tmp

pid process

2916 kat4508.tmp
2916 kat4508.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4508.tmp

pid	process
2916	kat4508.tmp
2916	kat4508.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe

description	pid	process	target process
PID 748 wrote to memory of 2916	748	46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe	kat4508.tmp
PID 748 wrote to memory of 2916	748	46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe	kat4508.tmp
PID 748 wrote to memory of 2916	748	46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe	kat4508.tmp
PID 748 wrote to memory of 2916	748	46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe	kat4508.tmp
PID 748 wrote to memory of 2916	748	46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe	kat4508.tmp
PID 748 wrote to memory of 2916	748	46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe	kat4508.tmp
PID 748 wrote to memory of 2916	748	46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe	kat4508.tmp
PID 748 wrote to memory of 2916	748	46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe	kat4508.tmp

C:\Users\Admin\AppData\Local\Temp\46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe
"C:\Users\Admin\AppData\Local\Temp\46befef3f1783ec60fddfca543d53cc49d16a83cb821f72ac3e417e91338a3fa.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:748

C:\Users\Admin\AppData\Local\Temp\kat4508.tmp
C:\Users\Admin\AppData\Local\Temp\kat4508.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2916

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\kat4508.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/748-0-0x0000000002220000-0x0000000002221000-memory.dmp

Filesize
4KB

Download
memory/748-2-0x0000000004000000-0x0000000004149000-memory.dmp

Filesize
1.3MB

Download
memory/748-10-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download
memory/2916-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-17-0x000000001DBC0000-0x000000001DE1F000-memory.dmp

Filesize
2.4MB

Download
memory/2916-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2916-33-0x0000000000400000-0x0000000000646000-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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