stealc | a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9

General

Target

a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe
Size

1.9MB
MD5

2f237011f5f088a4de202490813061a0
SHA1

d7934ff9d27654ebfcf1d07d6ec1f9c6104f67b0
SHA256

a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9
SHA512

5e475596618df2d5369bb4f16bba293fa03f5e4f67684070782bff9e867e7308d6a1ba6d72fca77b143109ce69c21e40547e121e8450ed5f480fb45d87a8a8e0
SSDEEP

49152:CdKfTn6v2JtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnFtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/3012-1-0x0000000004000000-0x0000000004149000-memory.dmp	family_vidar_v7
behavioral1/memory/1780-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1780-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1780-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1780-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1780-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1780-21-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1780-38-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1780-39-0x0000000000400000-0x0000000000646000-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:

kat3B24.tmp

pid process

1780 kat3B24.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
1780	kat3B24.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe

description	pid	process	target process
PID 3012 set thread context of 1780	3012	a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe	kat3B24.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:

kat3B24.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3B24.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat3B24.tmp

pid process

1780 kat3B24.tmp
1780 kat3B24.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3B24.tmp

pid	process
1780	kat3B24.tmp
1780	kat3B24.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe

description	pid	process	target process
PID 3012 wrote to memory of 1780	3012	a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe	kat3B24.tmp
PID 3012 wrote to memory of 1780	3012	a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe	kat3B24.tmp
PID 3012 wrote to memory of 1780	3012	a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe	kat3B24.tmp
PID 3012 wrote to memory of 1780	3012	a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe	kat3B24.tmp
PID 3012 wrote to memory of 1780	3012	a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe	kat3B24.tmp
PID 3012 wrote to memory of 1780	3012	a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe	kat3B24.tmp
PID 3012 wrote to memory of 1780	3012	a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe	kat3B24.tmp
PID 3012 wrote to memory of 1780	3012	a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe	kat3B24.tmp

C:\Users\Admin\AppData\Local\Temp\a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe
"C:\Users\Admin\AppData\Local\Temp\a3d0bc5f6e959410caee1353b15a67d5dbba25172b593fe06436acb7a312cfc9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3012

C:\Users\Admin\AppData\Local\Temp\kat3B24.tmp
C:\Users\Admin\AppData\Local\Temp\kat3B24.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1780

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\kat3B24.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1780-21-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1780-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1780-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1780-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1780-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1780-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1780-23-0x0000000022480000-0x00000000226DF000-memory.dmp

Filesize
2.4MB

Download
memory/1780-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1780-39-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3012-1-0x0000000004000000-0x0000000004149000-memory.dmp

Filesize
1.3MB

Download
memory/3012-9-0x0000000000400000-0x00000000005EC000-memory.dmp

Filesize
1.9MB

Download
memory/3012-0-0x0000000002240000-0x0000000002241000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads