stealc | c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183

General

Target

c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe
Size

2.1MB
MD5

db4ff366df435a94bb66350c32d66c8a
SHA1

6e75ab16ea0045d8ee894e6e32c71c22e62e3441
SHA256

c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183
SHA512

1945b7707ae28958b0b1b43d24210dd64001e7be6f91f0ac37f2e356fd1ccf5d070f042cb109d5b2763478723d02baf381173f29bca3b98cb706f24f1cedee86
SSDEEP

49152:N6uDuaS9ref+8JtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb978tIuoITsdZ

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/3308-2-0x0000000004010000-0x0000000004159000-memory.dmp	family_vidar_v7
behavioral1/memory/3436-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3436-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3436-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3436-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3436-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3436-28-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3436-29-0x0000000000400000-0x0000000000646000-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:

kat490F.tmp

pid process

3436 kat490F.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
3436	kat490F.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe

description	pid	process	target process
PID 3308 set thread context of 3436	3308	c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe	kat490F.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:

kat490F.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat490F.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat490F.tmp

pid process

3436 kat490F.tmp
3436 kat490F.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat490F.tmp

pid	process
3436	kat490F.tmp
3436	kat490F.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe

description	pid	process	target process
PID 3308 wrote to memory of 3436	3308	c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe	kat490F.tmp
PID 3308 wrote to memory of 3436	3308	c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe	kat490F.tmp
PID 3308 wrote to memory of 3436	3308	c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe	kat490F.tmp
PID 3308 wrote to memory of 3436	3308	c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe	kat490F.tmp
PID 3308 wrote to memory of 3436	3308	c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe	kat490F.tmp
PID 3308 wrote to memory of 3436	3308	c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe	kat490F.tmp
PID 3308 wrote to memory of 3436	3308	c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe	kat490F.tmp
PID 3308 wrote to memory of 3436	3308	c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe	kat490F.tmp

C:\Users\Admin\AppData\Local\Temp\c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe
"C:\Users\Admin\AppData\Local\Temp\c4fda86a54d54ca824f28aff3a13e39539dc13938f268dcea7d293235e684183.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3308

C:\Users\Admin\AppData\Local\Temp\kat490F.tmp
C:\Users\Admin\AppData\Local\Temp\kat490F.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3436

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\kat490F.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3308-0-0x0000000002270000-0x0000000002271000-memory.dmp

Filesize
4KB

Download
memory/3308-2-0x0000000004010000-0x0000000004159000-memory.dmp

Filesize
1.3MB

Download
memory/3308-7-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download
memory/3436-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3436-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3436-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3436-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3436-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3436-20-0x000000001B790000-0x000000001B9EF000-memory.dmp

Filesize
2.4MB

Download
memory/3436-28-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3436-29-0x0000000000400000-0x0000000000646000-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