stealc | 8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae

General

Target

8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe
Size

1.8MB
MD5

12f7cf374e153af525a37e7157e11c10
SHA1

3231c4dc99f5d72ec6c0fc4af94e47384ddda8d3
SHA256

8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae
SHA512

f3a48045330be8ac9b3b5e591d4037de4401463840df33a75bd30f6ce39d9f86f4ec691a97241efc01edf54ccd2db0983319f390a614efab76bace8941f0b01e
SSDEEP

24576:FBfuZfeq6sxO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFbJtTF+TxMoxc1TU+j+dAzGwlrh

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/1612-2-0x0000000004030000-0x0000000004179000-memory.dmp	family_vidar_v7
behavioral2/memory/4064-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4064-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4064-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4064-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4064-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4064-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4064-35-0x0000000000400000-0x0000000000646000-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:

kat566D.tmp

pid process

4064 kat566D.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
4064	kat566D.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe

description	pid	process	target process
PID 1612 set thread context of 4064	1612	8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe	kat566D.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:

kat566D.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat566D.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat566D.tmp

pid process

4064 kat566D.tmp
4064 kat566D.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat566D.tmp

pid	process
4064	kat566D.tmp
4064	kat566D.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe

description	pid	process	target process
PID 1612 wrote to memory of 4064	1612	8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe	kat566D.tmp
PID 1612 wrote to memory of 4064	1612	8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe	kat566D.tmp
PID 1612 wrote to memory of 4064	1612	8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe	kat566D.tmp
PID 1612 wrote to memory of 4064	1612	8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe	kat566D.tmp
PID 1612 wrote to memory of 4064	1612	8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe	kat566D.tmp
PID 1612 wrote to memory of 4064	1612	8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe	kat566D.tmp
PID 1612 wrote to memory of 4064	1612	8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe	kat566D.tmp
PID 1612 wrote to memory of 4064	1612	8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe	kat566D.tmp

C:\Users\Admin\AppData\Local\Temp\8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe
"C:\Users\Admin\AppData\Local\Temp\8a6fcbbaeba40a7708df130f0537981cf3e5a0e812afcb3ebc46a319d3abe0ae.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1612

C:\Users\Admin\AppData\Local\Temp\kat566D.tmp
C:\Users\Admin\AppData\Local\Temp\kat566D.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4064

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat566D.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1612-0-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download
memory/1612-2-0x0000000004030000-0x0000000004179000-memory.dmp

Filesize
1.3MB

Download
memory/1612-10-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download
memory/4064-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4064-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4064-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4064-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4064-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4064-19-0x0000000019430000-0x000000001968F000-memory.dmp

Filesize
2.4MB

Download
memory/4064-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4064-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads