stealc | 12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27

General

Target

12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe
Size

2.0MB
MD5

b744db4b971c328001c4fbaf685a6d71
SHA1

b5c0dc4dd8aab8adb6d4d0e17481106ea9f4bfd5
SHA256

12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27
SHA512

8b5fcf865cea7e9db845e5b0e494d43114943f160352bcd2b1ee2747c057ea1dcc07a4ff64384a75fa2e194b1fd81a440456b8a4cf8ea12bc50c3215cca4f1d1
SSDEEP

49152:7QzHt472DgJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHt+tIuoITsdZ

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
behavioral2/memory/4864-2-0x00000000041A0000-0x00000000042E9000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4324-35-0x0000000000400000-0x0000000000646000-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:

kat4B80.tmp

pid process

4324 kat4B80.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
4324	kat4B80.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe

description	pid	process	target process
PID 4864 set thread context of 4324	4864	12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe	kat4B80.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:

kat4B80.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4B80.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4B80.tmp

pid process

4324 kat4B80.tmp
4324 kat4B80.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4B80.tmp

pid	process
4324	kat4B80.tmp
4324	kat4B80.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe

description	pid	process	target process
PID 4864 wrote to memory of 4324	4864	12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe	kat4B80.tmp
PID 4864 wrote to memory of 4324	4864	12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe	kat4B80.tmp
PID 4864 wrote to memory of 4324	4864	12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe	kat4B80.tmp
PID 4864 wrote to memory of 4324	4864	12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe	kat4B80.tmp
PID 4864 wrote to memory of 4324	4864	12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe	kat4B80.tmp
PID 4864 wrote to memory of 4324	4864	12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe	kat4B80.tmp
PID 4864 wrote to memory of 4324	4864	12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe	kat4B80.tmp
PID 4864 wrote to memory of 4324	4864	12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe	kat4B80.tmp

C:\Users\Admin\AppData\Local\Temp\12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe
"C:\Users\Admin\AppData\Local\Temp\12358655f745708b9a29fd19ac08970fab28ae68b7ae9172a461fee772941e27.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4864

C:\Users\Admin\AppData\Local\Temp\kat4B80.tmp
C:\Users\Admin\AppData\Local\Temp\kat4B80.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4324

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\kat4B80.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4324-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4324-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4324-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4324-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4324-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4324-19-0x00000000193E0000-0x000000001963F000-memory.dmp

Filesize
2.4MB

Download
memory/4324-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4324-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4864-0-0x00000000025B0000-0x00000000025B1000-memory.dmp

Filesize
4KB

Download
memory/4864-2-0x00000000041A0000-0x00000000042E9000-memory.dmp

Filesize
1.3MB

Download
memory/4864-10-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads