stealc | 1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020

General

Target

1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe
Size

2.0MB
MD5

59358f6704a41dcee99862134b1a7e8c
SHA1

dc9dcd9a410c4c906831221ae35f9e0491942f8e
SHA256

1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020
SHA512

ba5e1ab503013fa1243518a5c801c81a222c8643f490662f33333e33a8bb8ae5feaa13551478ceec28afa7c78fbb61ce6ca8ce1ed6323f3127e0142e4e0dbaa8
SSDEEP

49152:7QzHt472DTJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtZtIuoITsdZ

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/4968-2-0x0000000004230000-0x0000000004379000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-35-0x0000000000400000-0x0000000000646000-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:

kat5052.tmp

pid process

1056 kat5052.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
1056	kat5052.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe

description	pid	process	target process
PID 4968 set thread context of 1056	4968	1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe	kat5052.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:

kat5052.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat5052.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat5052.tmp

pid process

1056 kat5052.tmp
1056 kat5052.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5052.tmp

pid	process
1056	kat5052.tmp
1056	kat5052.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe

description	pid	process	target process
PID 4968 wrote to memory of 1056	4968	1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe	kat5052.tmp
PID 4968 wrote to memory of 1056	4968	1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe	kat5052.tmp
PID 4968 wrote to memory of 1056	4968	1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe	kat5052.tmp
PID 4968 wrote to memory of 1056	4968	1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe	kat5052.tmp
PID 4968 wrote to memory of 1056	4968	1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe	kat5052.tmp
PID 4968 wrote to memory of 1056	4968	1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe	kat5052.tmp
PID 4968 wrote to memory of 1056	4968	1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe	kat5052.tmp
PID 4968 wrote to memory of 1056	4968	1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe	kat5052.tmp

C:\Users\Admin\AppData\Local\Temp\1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe
"C:\Users\Admin\AppData\Local\Temp\1686f4c3ad60b03cfe3b064ceddbe212ce9e2030aa3126804446bb9d1d8de020.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4968

C:\Users\Admin\AppData\Local\Temp\kat5052.tmp
C:\Users\Admin\AppData\Local\Temp\kat5052.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1056

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\kat5052.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1056-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1056-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1056-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1056-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1056-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1056-19-0x000000001B850000-0x000000001BAAF000-memory.dmp

Filesize
2.4MB

Download
memory/1056-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1056-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4968-0-0x00000000025A0000-0x00000000025A1000-memory.dmp

Filesize
4KB

Download
memory/4968-2-0x0000000004230000-0x0000000004379000-memory.dmp

Filesize
1.3MB

Download
memory/4968-9-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads