stealc | fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886

General

Target

fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe
Size

2.4MB
MD5

8abf6048a2772227d534f9f6e54f9410
SHA1

b173a12c290c37751a2ea4a83bbf7afa35215b69
SHA256

fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886
SHA512

c24a629df1341d15776670a038995d35d4c9fc25a1768e2253dcdaee61d79fffaa31b0c138fa1b9c8c801796cab635c92c9c6ef5a30365b50757b8b56e3b69d0
SSDEEP

49152:jxIRJF1HL+VdX68kUKJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dKtIuoITsdZ

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/264-2-0x0000000004120000-0x0000000004269000-memory.dmp	family_vidar_v7
behavioral1/memory/5056-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/5056-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/5056-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/5056-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/5056-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/5056-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/5056-33-0x0000000000400000-0x0000000000646000-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:

kat5331.tmp

pid process

5056 kat5331.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
5056	kat5331.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe

description	pid	process	target process
PID 264 set thread context of 5056	264	fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe	kat5331.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:

kat5331.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat5331.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat5331.tmp

pid process

5056 kat5331.tmp
5056 kat5331.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5331.tmp

pid	process
5056	kat5331.tmp
5056	kat5331.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe

description	pid	process	target process
PID 264 wrote to memory of 5056	264	fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe	kat5331.tmp
PID 264 wrote to memory of 5056	264	fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe	kat5331.tmp
PID 264 wrote to memory of 5056	264	fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe	kat5331.tmp
PID 264 wrote to memory of 5056	264	fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe	kat5331.tmp
PID 264 wrote to memory of 5056	264	fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe	kat5331.tmp
PID 264 wrote to memory of 5056	264	fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe	kat5331.tmp
PID 264 wrote to memory of 5056	264	fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe	kat5331.tmp
PID 264 wrote to memory of 5056	264	fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe	kat5331.tmp

C:\Users\Admin\AppData\Local\Temp\fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe
"C:\Users\Admin\AppData\Local\Temp\fb220d172fe9238bcd867c8a80259402be56d7e8249539f60db0a1f21c8f1886.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:264
- C:\Users\Admin\AppData\Local\Temp\kat5331.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5331.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:5056

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\kat5331.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/264-0-0x00000000022D0000-0x00000000022D1000-memory.dmp

Filesize
4KB

Download
memory/264-2-0x0000000004120000-0x0000000004269000-memory.dmp

Filesize
1.3MB

Download
memory/264-9-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download
memory/5056-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5056-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5056-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5056-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5056-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5056-17-0x000000001B720000-0x000000001B97F000-memory.dmp

Filesize
2.4MB

Download
memory/5056-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5056-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads