stealc | f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9

General

Target

f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe
Size

1.9MB
MD5

bcd8a4fd0ca74f8502dae68152f9b99e
SHA1

5974bc3e24c7745ddec186a4cc6ed356099b7f61
SHA256

f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9
SHA512

4da2848eded31a0ed9f94e81b935a4abb1611bfd9dc68617562bb878e8eab36a78135f2f29b0d7530d1c5412310022d1f75189e15f6ef985f1a0281b01dd5b26
SSDEEP

49152:zsC/lYEBYTsEAQACR07Q3byRD8aXY658:zsCdYEBqfAw07QLyLn

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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

resource	yara_rule
behavioral1/memory/380-2-0x00000000040B0000-0x0000000004213000-memory.dmp	family_vidar_v7
behavioral1/memory/3544-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3544-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3544-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3544-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3544-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3544-40-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3544-41-0x0000000000400000-0x0000000000648000-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

pid	Process
3544	kat4AF3.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 380 set thread context of 3544	380	f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe	81

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4AF3.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3544	kat4AF3.tmp
3544	kat4AF3.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 380 wrote to memory of 3544	380	f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe	81
PID 380 wrote to memory of 3544	380	f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe	81
PID 380 wrote to memory of 3544	380	f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe	81
PID 380 wrote to memory of 3544	380	f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe	81
PID 380 wrote to memory of 3544	380	f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe	81
PID 380 wrote to memory of 3544	380	f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe	81
PID 380 wrote to memory of 3544	380	f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe	81
PID 380 wrote to memory of 3544	380	f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe	81

C:\Users\Admin\AppData\Local\Temp\f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe
"C:\Users\Admin\AppData\Local\Temp\f64acfdbcdd0e6ef867864163312cc89b6c4df3589ff333f4e901e2b01dc7de9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:380
- C:\Users\Admin\AppData\Local\Temp\kat4AF3.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4AF3.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3544

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\kat4AF3.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/380-0-0x0000000002240000-0x0000000002241000-memory.dmp

Filesize
4KB

Download
memory/380-2-0x00000000040B0000-0x0000000004213000-memory.dmp

Filesize
1.4MB

Download
memory/380-10-0x0000000000400000-0x00000000005EE000-memory.dmp

Filesize
1.9MB

Download
memory/3544-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3544-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3544-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3544-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3544-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3544-25-0x000000001B7D0000-0x000000001BA2F000-memory.dmp

Filesize
2.4MB

Download
memory/3544-40-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3544-41-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads