stealc | 4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
01-07-2024 07:21

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General

Target

4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe
Size

2.2MB
MD5

d7186946ba0926a9bdbdcb33ab59768d
SHA1

36efd4957378955206d44495e76a7f27921cf14f
SHA256

4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95
SHA512

64b76b93cc59a0a88b5f5050dcf375032574d80b534a44252dd7e8d857b3a041efe67416c57201302aab4552b7acad909b268f8164865c680035a4896064002c
SSDEEP

24576:Uc0PyhhGkCI1wUL24jtYkYGbawg757CgXueAgXfqU2MZQti1u8LnsDJY6WpEYGYG:UJ0hsA91MPp21tuuIeNHYGY0LzjsJxK

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/4420-2-0x00000000040D0000-0x00000000041E3000-memory.dmp	family_vidar_v7
behavioral2/memory/4132-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4132-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4132-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4132-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4132-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4132-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4132-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4132-17-0x0000000000400000-0x0000000000648000-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
Executes dropped EXE 1 IoCs

Processes:

kat90F5.tmp

pid process

4132 kat90F5.tmp
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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

Processes:

4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe

description pid process target process

PID 4420 set thread context of 4132 4420 4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe kat90F5.tmp
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4132	kat90F5.tmp

description	pid	process	target process
PID 4420 set thread context of 4132	4420	4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe	kat90F5.tmp

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

kat90F5.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat90F5.tmp
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat90F5.tmp

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4924 timeout.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

kat90F5.tmp

pid process

4132 kat90F5.tmp
4132 kat90F5.tmp
4132 kat90F5.tmp
4132 kat90F5.tmp
4132 kat90F5.tmp
4132 kat90F5.tmp

pid	process
4924	timeout.exe

pid	process
4132	kat90F5.tmp
4132	kat90F5.tmp
4132	kat90F5.tmp
4132	kat90F5.tmp
4132	kat90F5.tmp
4132	kat90F5.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exekat90F5.tmpcmd.exe

description	pid	process	target process
PID 4420 wrote to memory of 4132	4420	4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe	kat90F5.tmp
PID 4420 wrote to memory of 4132	4420	4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe	kat90F5.tmp
PID 4420 wrote to memory of 4132	4420	4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe	kat90F5.tmp
PID 4420 wrote to memory of 4132	4420	4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe	kat90F5.tmp
PID 4420 wrote to memory of 4132	4420	4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe	kat90F5.tmp
PID 4420 wrote to memory of 4132	4420	4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe	kat90F5.tmp
PID 4420 wrote to memory of 4132	4420	4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe	kat90F5.tmp
PID 4420 wrote to memory of 4132	4420	4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe	kat90F5.tmp
PID 4132 wrote to memory of 664	4132	kat90F5.tmp	cmd.exe
PID 4132 wrote to memory of 664	4132	kat90F5.tmp	cmd.exe
PID 4132 wrote to memory of 664	4132	kat90F5.tmp	cmd.exe
PID 664 wrote to memory of 4924	664	cmd.exe	timeout.exe
PID 664 wrote to memory of 4924	664	cmd.exe	timeout.exe
PID 664 wrote to memory of 4924	664	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe
"C:\Users\Admin\AppData\Local\Temp\4aff771e5595904d0d6a10f74910aeb1f68e6ec34e8a2e74e915b78139a90b95.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4420

C:\Users\Admin\AppData\Local\Temp\kat90F5.tmp
C:\Users\Admin\AppData\Local\Temp\kat90F5.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4132

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat90F5.tmp" & rd /s /q "C:\ProgramData\DAAFBAKECAEG" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:664

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:4924

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat90F5.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4132-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4132-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4132-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4132-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4132-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4132-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4132-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4132-17-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4420-0-0x00000000023A0000-0x00000000023A1000-memory.dmp

Filesize
4KB

Download
memory/4420-2-0x00000000040D0000-0x00000000041E3000-memory.dmp

Filesize
1.1MB

Download
memory/4420-9-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download