stealc | 79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa

General

Target

79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe
Size

1.8MB
MD5

1881e115a57a40aa86493f5424972c04
SHA1

9ea6315817acb0f6a5e226f7482d1b8735b07133
SHA256

79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa
SHA512

70e0b4f60514035f003797ff475cfd4693367bef4d3326dfc402da564b8d8317db816c81dd24679a302cf484718e705943907fff2a20930f419c2631285bd0bd
SSDEEP

24576:FBfuZfeq6sdO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFPJtTF+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/4852-2-0x0000000004060000-0x00000000041A9000-memory.dmp	family_vidar_v7
behavioral2/memory/3304-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3304-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3304-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3304-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3304-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3304-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3304-38-0x0000000000400000-0x0000000000646000-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:

kat41BC.tmp

pid process

3304 kat41BC.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
3304	kat41BC.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe

description	pid	process	target process
PID 4852 set thread context of 3304	4852	79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe	kat41BC.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:

kat41BC.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat41BC.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat41BC.tmp

pid process

3304 kat41BC.tmp
3304 kat41BC.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat41BC.tmp

pid	process
3304	kat41BC.tmp
3304	kat41BC.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe

description	pid	process	target process
PID 4852 wrote to memory of 3304	4852	79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe	kat41BC.tmp
PID 4852 wrote to memory of 3304	4852	79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe	kat41BC.tmp
PID 4852 wrote to memory of 3304	4852	79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe	kat41BC.tmp
PID 4852 wrote to memory of 3304	4852	79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe	kat41BC.tmp
PID 4852 wrote to memory of 3304	4852	79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe	kat41BC.tmp
PID 4852 wrote to memory of 3304	4852	79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe	kat41BC.tmp
PID 4852 wrote to memory of 3304	4852	79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe	kat41BC.tmp
PID 4852 wrote to memory of 3304	4852	79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe	kat41BC.tmp

C:\Users\Admin\AppData\Local\Temp\79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe
"C:\Users\Admin\AppData\Local\Temp\79a8a05cc8390c81d05a519f362fda1cbc145907867c85b2a819c8dcb6660aaa.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4852
- C:\Users\Admin\AppData\Local\Temp\kat41BC.tmp
  C:\Users\Admin\AppData\Local\Temp\kat41BC.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3304

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\kat41BC.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3304-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3304-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3304-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3304-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3304-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3304-22-0x0000000026090000-0x00000000262EF000-memory.dmp

Filesize
2.4MB

Download
memory/3304-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3304-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4852-0-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download
memory/4852-2-0x0000000004060000-0x00000000041A9000-memory.dmp

Filesize
1.3MB

Download
memory/4852-10-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads