stealc | 43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd

General

Target

43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe
Size

1.8MB
MD5

3fe2e10e77be2fdb1e5dc41680482311
SHA1

b02a642052ff1d132c63e37b48aa02889ee4223a
SHA256

43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd
SHA512

0184f6762301305053e289403aa87f5b762c2737e68efcadac988724c4e29fef64d9eb147be569576f8b5ed42432854bc706232d2d3efd0f6928f15ec53987bc
SSDEEP

24576:FBfuZfeq6slO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qF3JtTF+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/5072-1-0x0000000003FC0000-0x0000000004109000-memory.dmp	family_vidar_v7
behavioral1/memory/2488-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2488-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2488-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2488-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2488-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2488-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2488-38-0x0000000000400000-0x0000000000646000-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:

kat54D7.tmp

pid process

2488 kat54D7.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
2488	kat54D7.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe

description	pid	process	target process
PID 5072 set thread context of 2488	5072	43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe	kat54D7.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:

kat54D7.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat54D7.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat54D7.tmp

pid process

2488 kat54D7.tmp
2488 kat54D7.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat54D7.tmp

pid	process
2488	kat54D7.tmp
2488	kat54D7.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe

description	pid	process	target process
PID 5072 wrote to memory of 2488	5072	43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe	kat54D7.tmp
PID 5072 wrote to memory of 2488	5072	43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe	kat54D7.tmp
PID 5072 wrote to memory of 2488	5072	43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe	kat54D7.tmp
PID 5072 wrote to memory of 2488	5072	43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe	kat54D7.tmp
PID 5072 wrote to memory of 2488	5072	43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe	kat54D7.tmp
PID 5072 wrote to memory of 2488	5072	43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe	kat54D7.tmp
PID 5072 wrote to memory of 2488	5072	43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe	kat54D7.tmp
PID 5072 wrote to memory of 2488	5072	43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe	kat54D7.tmp

C:\Users\Admin\AppData\Local\Temp\43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe
"C:\Users\Admin\AppData\Local\Temp\43f452e3c2f65ade397c970bb8b3e520a04b4da7f9750c8a22d1835abbf462fd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5072

C:\Users\Admin\AppData\Local\Temp\kat54D7.tmp
C:\Users\Admin\AppData\Local\Temp\kat54D7.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2488

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\kat54D7.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2488-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2488-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2488-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2488-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2488-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2488-22-0x00000000283F0000-0x000000002864F000-memory.dmp

Filesize
2.4MB

Download
memory/2488-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2488-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5072-0-0x0000000002230000-0x0000000002231000-memory.dmp

Filesize
4KB

Download
memory/5072-1-0x0000000003FC0000-0x0000000004109000-memory.dmp

Filesize
1.3MB

Download
memory/5072-9-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads