stealc | 9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885

Resubmissions

14-06-2024 01:34

240614-by3geazena 10

13-06-2024 23:44

240613-3q5qcazckj 10

Analysis

max time kernel
30s
max time network
31s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
14-06-2024 01:34

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General

Target

9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe
Size

368KB
MD5

bf808afcc221165140ff57a5e31bdef2
SHA1

64f4ddd4a0f8cde10c990e6167fefb95a311ccec
SHA256

9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885
SHA512

d1521cd2ca9e064a08f4252bd82c0b6c97c464c49cd327a201d085107201e9cac02a9b311e042e79ee1eddee482975afea1ef0682e2c8bbd74e1415f23cbe1cf
SSDEEP

3072:VUrql9LC/xRNNWY+/BFsiLMcOQlBDQiOKehsPsPn0ScNMvlL+l0A+5NnpINCfh1:VUraLC/xRPO/BmjJQlNKhskHcwL+W/b

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

https://t.me/memve4erin

https://steamcommunity.com/profiles/76561199699680841

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 8 IoCs

stealer

resource	yara_rule
behavioral2/memory/2152-3-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2152-2-0x00000000024F0000-0x0000000002525000-memory.dmp	family_vidar_v7
behavioral2/memory/2152-1-0x0000000002540000-0x0000000002640000-memory.dmp	family_vidar_v7
behavioral2/memory/2152-4-0x0000000000400000-0x0000000002378000-memory.dmp	family_vidar_v7
behavioral2/memory/2152-6-0x0000000000400000-0x0000000002378000-memory.dmp	family_vidar_v7
behavioral2/memory/2152-7-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2152-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2152-8-0x0000000000400000-0x0000000002378000-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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation	9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe

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
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3204	2152	WerFault.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	9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2548	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2152	9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe
2152	9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 1916	2152	9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe	85
PID 2152 wrote to memory of 1916	2152	9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe	85
PID 2152 wrote to memory of 1916	2152	9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe	85
PID 1916 wrote to memory of 2548	1916	cmd.exe	89
PID 1916 wrote to memory of 2548	1916	cmd.exe	89
PID 1916 wrote to memory of 2548	1916	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe
"C:\Users\Admin\AppData\Local\Temp\9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe"
1⤵
- Checks computer location settings
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2152
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\9fd04eb7256cd879dc38ea0765ffc538b89e708ba30250f23d947c3713f97885.exe" & rd /s /q "C:\ProgramData\JJJEGCGDGHCB" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1916
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 10
    3⤵
    - Delays execution with timeout.exe
    PID:2548
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2152 -s 1816
  2⤵
  - Program crash
  PID:3204

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2152 -ip 2152
1⤵
PID:3660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

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Downloads

memory/2152-3-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2152-2-0x00000000024F0000-0x0000000002525000-memory.dmp

Filesize
212KB

Download
memory/2152-1-0x0000000002540000-0x0000000002640000-memory.dmp

Filesize
1024KB

Download
memory/2152-4-0x0000000000400000-0x0000000002378000-memory.dmp

Filesize
31.5MB

Download
memory/2152-5-0x0000000002540000-0x0000000002640000-memory.dmp

Filesize
1024KB

Download
memory/2152-6-0x0000000000400000-0x0000000002378000-memory.dmp

Filesize
31.5MB

Download
memory/2152-7-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2152-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2152-8-0x0000000000400000-0x0000000002378000-memory.dmp

Filesize
31.5MB

Download