stealc | 8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24

General

Target

8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe
Size

2.4MB
MD5

f1b762ec0868115ea8a39d6ef051d485
SHA1

a6bcb404c0ad9076d7db06ae8c242e2f6ee87b0f
SHA256

8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24
SHA512

365c6a50f743bb4962d566bad184f28eda09014578662918d2121d2ce1caa469476bd03de11251d09c3dd2f9fa9f4df5e84b1aee9c9f14622cd5ebd526eb14d4
SSDEEP

49152:jxIRJF1HL+VdX68kU+JtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68d+tIuoITsdZ

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 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/3564-2-0x00000000040C0000-0x0000000004209000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3840-35-0x0000000000400000-0x0000000000646000-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:

kat7C64.tmp

pid process

3840 kat7C64.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
3840	kat7C64.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe

description	pid	process	target process
PID 3564 set thread context of 3840	3564	8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe	kat7C64.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:

kat7C64.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat7C64.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat7C64.tmp

pid process

3840 kat7C64.tmp
3840 kat7C64.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat7C64.tmp

pid	process
3840	kat7C64.tmp
3840	kat7C64.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe

description	pid	process	target process
PID 3564 wrote to memory of 3840	3564	8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe	kat7C64.tmp
PID 3564 wrote to memory of 3840	3564	8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe	kat7C64.tmp
PID 3564 wrote to memory of 3840	3564	8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe	kat7C64.tmp
PID 3564 wrote to memory of 3840	3564	8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe	kat7C64.tmp
PID 3564 wrote to memory of 3840	3564	8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe	kat7C64.tmp
PID 3564 wrote to memory of 3840	3564	8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe	kat7C64.tmp
PID 3564 wrote to memory of 3840	3564	8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe	kat7C64.tmp
PID 3564 wrote to memory of 3840	3564	8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe	kat7C64.tmp

C:\Users\Admin\AppData\Local\Temp\8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe
"C:\Users\Admin\AppData\Local\Temp\8b58b14f2bce7f4640b46249cd6754d4334fd2cb5943d450d1c540c379adfe24.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3564

C:\Users\Admin\AppData\Local\Temp\kat7C64.tmp
C:\Users\Admin\AppData\Local\Temp\kat7C64.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3840

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat7C64.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3564-0-0x00000000023D0000-0x00000000023D1000-memory.dmp

Filesize
4KB

Download
memory/3564-2-0x00000000040C0000-0x0000000004209000-memory.dmp

Filesize
1.3MB

Download
memory/3564-10-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download
memory/3840-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3840-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3840-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3840-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3840-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3840-19-0x0000000019390000-0x00000000195EF000-memory.dmp

Filesize
2.4MB

Download
memory/3840-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3840-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads