stealc | e85d5b53626307eb032ccfe4ba7e1441a88af81062e5afe8a69f1d283b4f3ea9

Resubmissions

11-10-2024 14:50

241011-r7wcfsxhkf 10

11-10-2024 14:47

241011-r5zbbssgrp 10

Analysis

max time kernel
30s
max time network
31s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11-10-2024 14:47

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General

Target

default.exe
Size

4.2MB
MD5

589903101622ead17fb90da578086962
SHA1

8c0b3b771ac79959dc155166bf22495b3197b97d
SHA256

e85d5b53626307eb032ccfe4ba7e1441a88af81062e5afe8a69f1d283b4f3ea9
SHA512

49b74af8105878f6d7e491f6bb56d23ad8cb28e317a0c99a1ac36b7aa4948610e3d171a2b64a58fd3fab83ba48691f58bf033462a592fa61bbdd6cb9e49a47fd
SSDEEP

49152:UTgmiz2o3rioSPZQpAookqlq40imXDUZei3xRxwcCjg5835S2m:UcfbiV9U5/3HE58p

Score

10^/10

stealc vidar 6b8642176bdf6e69e18dcef863f92aad credential_access discovery stealer

Malware Config

Extracted

Family

vidar

Version

10.2

Botnet

6b8642176bdf6e69e18dcef863f92aad

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 6 IoCs

stealer

resource	yara_rule
behavioral1/memory/4264-70-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4264-68-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4264-74-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4264-86-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4264-87-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4264-89-0x0000000000400000-0x0000000000648000-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

.NET Reactor proctector 1 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral1/memory/60-1-0x0000000000890000-0x0000000000CCC000-memory.dmp	net_reactor

Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 60 set thread context of 4264	60	default.exe	88

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	default.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	MSBuild.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	MSBuild.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4436	timeout.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
60	default.exe
60	default.exe
4264	MSBuild.exe
4264	MSBuild.exe
4264	MSBuild.exe
4264	MSBuild.exe
4264	MSBuild.exe
4264	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	60	default.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 60 wrote to memory of 1664	60	default.exe	87
PID 60 wrote to memory of 1664	60	default.exe	87
PID 60 wrote to memory of 1664	60	default.exe	87
PID 60 wrote to memory of 4264	60	default.exe	88
PID 60 wrote to memory of 4264	60	default.exe	88
PID 60 wrote to memory of 4264	60	default.exe	88
PID 60 wrote to memory of 4264	60	default.exe	88
PID 60 wrote to memory of 4264	60	default.exe	88
PID 60 wrote to memory of 4264	60	default.exe	88
PID 60 wrote to memory of 4264	60	default.exe	88
PID 60 wrote to memory of 4264	60	default.exe	88
PID 60 wrote to memory of 4264	60	default.exe	88
PID 4264 wrote to memory of 4788	4264	MSBuild.exe	90
PID 4264 wrote to memory of 4788	4264	MSBuild.exe	90
PID 4264 wrote to memory of 4788	4264	MSBuild.exe	90
PID 4788 wrote to memory of 4436	4788	cmd.exe	92
PID 4788 wrote to memory of 4436	4788	cmd.exe	92
PID 4788 wrote to memory of 4436	4788	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\default.exe
"C:\Users\Admin\AppData\Local\Temp\default.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:60
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  PID:1664
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4264
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe" & rd /s /q "C:\ProgramData\FCGCFCAFIIEB" & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4788
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:4436

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/60-45-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-73-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/60-2-0x00000000056F0000-0x000000000578C000-memory.dmp

Filesize
624KB

Download
memory/60-3-0x0000000005620000-0x000000000562A000-memory.dmp

Filesize
40KB

Download
memory/60-4-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/60-5-0x0000000005790000-0x000000000588A000-memory.dmp

Filesize
1000KB

Download
memory/60-6-0x0000000005660000-0x0000000005668000-memory.dmp

Filesize
32KB

Download
memory/60-7-0x0000000005670000-0x000000000568C000-memory.dmp

Filesize
112KB

Download
memory/60-8-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-17-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-67-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-85-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/60-72-0x00000000748E0000-0x0000000075090000-memory.dmp

Filesize
7.7MB

Download
memory/60-47-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-49-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-63-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-61-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-60-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-57-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-55-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-54-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-52-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-65-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-1-0x0000000000890000-0x0000000000CCC000-memory.dmp

Filesize
4.2MB

Download
memory/60-27-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-43-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-41-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-39-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-37-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-35-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-31-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-29-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-0-0x00000000748EE000-0x00000000748EF000-memory.dmp

Filesize
4KB

Download
memory/60-25-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-23-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-21-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-19-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-15-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-14-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-11-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-9-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/60-33-0x0000000005670000-0x0000000005685000-memory.dmp

Filesize
84KB

Download
memory/4264-68-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4264-74-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4264-70-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4264-86-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4264-87-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4264-89-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download