stealc | b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2

General

Target

b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe
Size

2.0MB
MD5

85a0a6d2685712b4cf6afc5cb10a93e7
SHA1

e6f8ad4d3862de7eba2f2fc4721d89ef0fba38fe
SHA256

b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2
SHA512

f934b45e131db9cbdf3ae0eb3b6777b938c451e32b6f6b616604ba5098d0f881c628cc2a8723f19e30ca4d86cd20e8893fb72a823a449e41538e20f41c79d6ed
SSDEEP

49152:7QzHt472DaJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtMtIuoITsdZ

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/2724-1-0x0000000004060000-0x00000000041A9000-memory.dmp	family_vidar_v7
behavioral1/memory/3996-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3996-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3996-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3996-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3996-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3996-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3996-33-0x0000000000400000-0x0000000000646000-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:

kat3B44.tmp

pid process

3996 kat3B44.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
3996	kat3B44.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe

description	pid	process	target process
PID 2724 set thread context of 3996	2724	b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe	kat3B44.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:

kat3B44.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3B44.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat3B44.tmp

pid process

3996 kat3B44.tmp
3996 kat3B44.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3B44.tmp

pid	process
3996	kat3B44.tmp
3996	kat3B44.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe

description	pid	process	target process
PID 2724 wrote to memory of 3996	2724	b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe	kat3B44.tmp
PID 2724 wrote to memory of 3996	2724	b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe	kat3B44.tmp
PID 2724 wrote to memory of 3996	2724	b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe	kat3B44.tmp
PID 2724 wrote to memory of 3996	2724	b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe	kat3B44.tmp
PID 2724 wrote to memory of 3996	2724	b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe	kat3B44.tmp
PID 2724 wrote to memory of 3996	2724	b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe	kat3B44.tmp
PID 2724 wrote to memory of 3996	2724	b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe	kat3B44.tmp
PID 2724 wrote to memory of 3996	2724	b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe	kat3B44.tmp

C:\Users\Admin\AppData\Local\Temp\b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe
"C:\Users\Admin\AppData\Local\Temp\b9c592b9e1f1ce6649c2fe1f58c5a778fca65974003b8df0e7db90e57d3a33e2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2724

C:\Users\Admin\AppData\Local\Temp\kat3B44.tmp
C:\Users\Admin\AppData\Local\Temp\kat3B44.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3996

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\kat3B44.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2724-0-0x0000000002360000-0x0000000002361000-memory.dmp

Filesize
4KB

Download
memory/2724-1-0x0000000004060000-0x00000000041A9000-memory.dmp

Filesize
1.3MB

Download
memory/2724-10-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/3996-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3996-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3996-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3996-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3996-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3996-18-0x000000001B720000-0x000000001B97F000-memory.dmp

Filesize
2.4MB

Download
memory/3996-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3996-33-0x0000000000400000-0x0000000000646000-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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Downloads