stealc | f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240611-en
resource tags

arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
submitted
01-07-2024 21:36

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General

Target

f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe
Size

1.6MB
MD5

abab70683b8e44e8ba6bda544a8644f0
SHA1

9278cd5ce651e61ea88ddc39e9a6eefa854d8a24
SHA256

f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86
SHA512

01af958c43358fcb95951612d2265cb5680ad480c696dd0951d455b00e86e44e1a1ad6cdec16f58f78a207a4971c629b7ea8a5531810b65938006befa51cb9c8
SSDEEP

24576:T16dvdD4B0+lF0U2MZQti1u8LnsDJY6WpEYGYPORL4UjqmiIS5BxxK:T1Km2Or21tuuIeNHYGY0LzjsJxK

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 16 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/3552-1-0x0000000002B00000-0x0000000002C13000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-35-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-36-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-44-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-45-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-61-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-62-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-69-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-74-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-75-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4116-76-0x0000000000400000-0x0000000000648000-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

Processes:

kat74B3.tmp

pid process

4116 kat74B3.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
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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:

f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe

description pid process target process

PID 3552 set thread context of 4116 3552 f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe kat74B3.tmp
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4116	kat74B3.tmp

description	pid	process	target process
PID 3552 set thread context of 4116	3552	f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe	kat74B3.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:

kat74B3.tmp

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat74B3.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat74B3.tmp

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1116 timeout.exe
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

kat74B3.tmp

pid process

4116 kat74B3.tmp
4116 kat74B3.tmp
4116 kat74B3.tmp
4116 kat74B3.tmp
4116 kat74B3.tmp
4116 kat74B3.tmp
4116 kat74B3.tmp
4116 kat74B3.tmp

pid	process
1116	timeout.exe

pid	process
4116	kat74B3.tmp
4116	kat74B3.tmp
4116	kat74B3.tmp
4116	kat74B3.tmp
4116	kat74B3.tmp
4116	kat74B3.tmp
4116	kat74B3.tmp
4116	kat74B3.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exekat74B3.tmpcmd.exe

description	pid	process	target process
PID 3552 wrote to memory of 4116	3552	f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe	kat74B3.tmp
PID 3552 wrote to memory of 4116	3552	f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe	kat74B3.tmp
PID 3552 wrote to memory of 4116	3552	f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe	kat74B3.tmp
PID 3552 wrote to memory of 4116	3552	f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe	kat74B3.tmp
PID 3552 wrote to memory of 4116	3552	f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe	kat74B3.tmp
PID 3552 wrote to memory of 4116	3552	f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe	kat74B3.tmp
PID 3552 wrote to memory of 4116	3552	f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe	kat74B3.tmp
PID 3552 wrote to memory of 4116	3552	f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe	kat74B3.tmp
PID 4116 wrote to memory of 2952	4116	kat74B3.tmp	cmd.exe
PID 4116 wrote to memory of 2952	4116	kat74B3.tmp	cmd.exe
PID 4116 wrote to memory of 2952	4116	kat74B3.tmp	cmd.exe
PID 2952 wrote to memory of 1116	2952	cmd.exe	timeout.exe
PID 2952 wrote to memory of 1116	2952	cmd.exe	timeout.exe
PID 2952 wrote to memory of 1116	2952	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe
"C:\Users\Admin\AppData\Local\Temp\f61a6938815354d7f5df5fba81cb5626991a100a3275aab1eba37abd0aa12a86.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3552

C:\Users\Admin\AppData\Local\Temp\kat74B3.tmp
C:\Users\Admin\AppData\Local\Temp\kat74B3.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4116

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat74B3.tmp" & rd /s /q "C:\ProgramData\JJJECFIECBGD" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:2952

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:1116

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\kat74B3.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3552-9-0x0000000000400000-0x00000000005A9000-memory.dmp

Filesize
1.7MB

Download
memory/3552-1-0x0000000002B00000-0x0000000002C13000-memory.dmp

Filesize
1.1MB

Download
memory/3552-0-0x0000000002300000-0x0000000002301000-memory.dmp

Filesize
4KB

Download
memory/4116-35-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-36-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-27-0x000000002D170000-0x000000002D3CF000-memory.dmp

Filesize
2.4MB

Download
memory/4116-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-44-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-45-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-61-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-62-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-69-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-74-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-75-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4116-76-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download