stealc | 72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984

General

Target

72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe
Size

2.1MB
MD5

51dfbc9d4099c72b15e45fe817edede8
SHA1

8242f36d9ebc1571f675a7b5a3147e339ed342d9
SHA256

72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984
SHA512

28375c421eb315e7abc5f8dd44a713d144fc66d2044c0919ff841a9cd1720c8ae055c35d76d4081ce2835f6cce6aa098ab88461533ff0a6a0d1b3a2f8ab285f3
SSDEEP

49152:N6uDuaS9refWwJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9zwtIuoITsdZ

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/4080-2-0x0000000004030000-0x0000000004179000-memory.dmp	family_vidar_v7
behavioral1/memory/3068-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3068-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3068-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3068-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3068-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3068-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3068-33-0x0000000000400000-0x0000000000646000-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:

kat3289.tmp

pid process

3068 kat3289.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
3068	kat3289.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe

description	pid	process	target process
PID 4080 set thread context of 3068	4080	72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe	kat3289.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:

kat3289.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3289.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat3289.tmp

pid process

3068 kat3289.tmp
3068 kat3289.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3289.tmp

pid	process
3068	kat3289.tmp
3068	kat3289.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe

description	pid	process	target process
PID 4080 wrote to memory of 3068	4080	72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe	kat3289.tmp
PID 4080 wrote to memory of 3068	4080	72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe	kat3289.tmp
PID 4080 wrote to memory of 3068	4080	72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe	kat3289.tmp
PID 4080 wrote to memory of 3068	4080	72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe	kat3289.tmp
PID 4080 wrote to memory of 3068	4080	72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe	kat3289.tmp
PID 4080 wrote to memory of 3068	4080	72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe	kat3289.tmp
PID 4080 wrote to memory of 3068	4080	72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe	kat3289.tmp
PID 4080 wrote to memory of 3068	4080	72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe	kat3289.tmp

C:\Users\Admin\AppData\Local\Temp\72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe
"C:\Users\Admin\AppData\Local\Temp\72f8c8b85e06cfa56aa3ca24fc864bb009b337fa372636a329c4c16cee755984.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4080

C:\Users\Admin\AppData\Local\Temp\kat3289.tmp
C:\Users\Admin\AppData\Local\Temp\kat3289.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3068

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\kat3289.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3068-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3068-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3068-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3068-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3068-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3068-17-0x000000001B7B0000-0x000000001BA0F000-memory.dmp

Filesize
2.4MB

Download
memory/3068-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3068-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4080-0-0x00000000007A0000-0x00000000007A1000-memory.dmp

Filesize
4KB

Download
memory/4080-2-0x0000000004030000-0x0000000004179000-memory.dmp

Filesize
1.3MB

Download
memory/4080-9-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads