stealc | 285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273

General

Target

285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe
Size

2.4MB
MD5

fcf50151b62c80a071f6b9d7a31924e8
SHA1

944155fa05b10404162aa7831a2e54b84f14da51
SHA256

285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273
SHA512

eb3f725c16d46c5a0c28084d770efd6ae59a4f05f8d9bc09a42f7bf17279e6f0bfc343a7d04d0712f510c5d545962c2c8f01c9e0c75d571557e5de8dc83bef89
SSDEEP

49152:jxIRJF1HL+VdX68kUeJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68detIuoITsdZ

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

resource	yara_rule
behavioral2/memory/4816-1-0x00000000040F0000-0x0000000004239000-memory.dmp	family_vidar_v7
behavioral2/memory/3548-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3548-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3548-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3548-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3548-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3548-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3548-38-0x0000000000400000-0x0000000000646000-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

pid	Process
3548	kat3B73.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 4816 set thread context of 3548	4816	285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe	80

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	kat3B73.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3548	kat3B73.tmp
3548	kat3B73.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4816 wrote to memory of 3548	4816	285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe	80
PID 4816 wrote to memory of 3548	4816	285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe	80
PID 4816 wrote to memory of 3548	4816	285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe	80
PID 4816 wrote to memory of 3548	4816	285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe	80
PID 4816 wrote to memory of 3548	4816	285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe	80
PID 4816 wrote to memory of 3548	4816	285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe	80
PID 4816 wrote to memory of 3548	4816	285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe	80
PID 4816 wrote to memory of 3548	4816	285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe	80

C:\Users\Admin\AppData\Local\Temp\285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe
"C:\Users\Admin\AppData\Local\Temp\285e97efc72084742f239389b28d31382dcd9496efc0cc129257e33826b31273.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4816
- C:\Users\Admin\AppData\Local\Temp\kat3B73.tmp
  C:\Users\Admin\AppData\Local\Temp\kat3B73.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3548

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\kat3B73.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3548-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3548-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3548-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3548-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3548-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3548-22-0x0000000028580000-0x00000000287DF000-memory.dmp

Filesize
2.4MB

Download
memory/3548-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3548-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4816-0-0x00000000023E0000-0x00000000023E1000-memory.dmp

Filesize
4KB

Download
memory/4816-1-0x00000000040F0000-0x0000000004239000-memory.dmp

Filesize
1.3MB

Download
memory/4816-9-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads