stealc | 4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9

Analysis

max time kernel
129s
max time network
298s
platform
windows10-1703_x64
resource
win10-20240611-en
resource tags

arch:x64arch:x86image:win10-20240611-enlocale:en-usos:windows10-1703-x64system
submitted
11/07/2024, 22:33

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General

Target

4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe
Size

5.5MB
MD5

983dff02742f5837caf4346840a2781e
SHA1

068034b6154abcb93cf7cc63b43a1b68b74cbcc6
SHA256

4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9
SHA512

a7b5eb217a829aaeb902467d046d5dff1886bccb7b29c7081a5c512411dedfed2ac041d4ecbc7a29944be3eb643377aecd42cf15a7b32d759ab598a91059802d
SSDEEP

98304:nY/z5D4MPXHgcQI0pjKY6po40sv+nWwy3ir4:Ozp4MPUpwpo4Eny30

Score

10^/10

stealc vidar spyware stealer

Malware Config

Extracted

Family

vidar

https://steamcommunity.com/profiles/76561199735694209

https://t.me/puffclou

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.1) Gecko/20100101 Firefox/128.1

Signatures

Detect Vidar Stealer 5 IoCs

stealer

resource	yara_rule
behavioral2/memory/2224-67-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2224-69-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2224-72-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2224-81-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/2224-136-0x0000000000400000-0x0000000000648000-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

Loads dropped DLL 2 IoCs

pid	Process
2224	MSBuild.exe
2224	MSBuild.exe

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

Data from Local System
T1005

Credentials In Files
T1552.001

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4296 set thread context of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70

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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4896	timeout.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2224	MSBuild.exe
2224	MSBuild.exe
2224	MSBuild.exe
2224	MSBuild.exe
2224	MSBuild.exe
2224	MSBuild.exe
2224	MSBuild.exe
2224	MSBuild.exe
2224	MSBuild.exe
2224	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4296 wrote to memory of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70
PID 4296 wrote to memory of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70
PID 4296 wrote to memory of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70
PID 4296 wrote to memory of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70
PID 4296 wrote to memory of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70
PID 4296 wrote to memory of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70
PID 4296 wrote to memory of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70
PID 4296 wrote to memory of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70
PID 4296 wrote to memory of 2224	4296	4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe	70
PID 2224 wrote to memory of 4556	2224	MSBuild.exe	72
PID 2224 wrote to memory of 4556	2224	MSBuild.exe	72
PID 2224 wrote to memory of 4556	2224	MSBuild.exe	72
PID 4556 wrote to memory of 4896	4556	cmd.exe	74
PID 4556 wrote to memory of 4896	4556	cmd.exe	74
PID 4556 wrote to memory of 4896	4556	cmd.exe	74

C:\Users\Admin\AppData\Local\Temp\4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe
"C:\Users\Admin\AppData\Local\Temp\4bdfd59b483a10eb95136609e25962884d8c6c4c97249fde304dc19b504768c9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4296
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - Loads dropped DLL
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2224
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\EBAKEBAECGCB" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4556
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4896

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

Replay Monitor

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Downloads

\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
memory/2224-67-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2224-136-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2224-81-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2224-72-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2224-69-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4296-44-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-40-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-66-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-65-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-26-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-6-0x0000000005280000-0x000000000529C000-memory.dmp

Filesize
112KB

Download
memory/4296-62-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-60-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-58-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-56-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-54-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-52-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-50-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-48-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-46-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-0-0x000000007325E000-0x000000007325F000-memory.dmp

Filesize
4KB

Download
memory/4296-71-0x0000000073250000-0x000000007393E000-memory.dmp

Filesize
6.9MB

Download
memory/4296-42-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-5-0x00000000056D0000-0x0000000005822000-memory.dmp

Filesize
1.3MB

Download
memory/4296-36-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-34-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-32-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-30-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-28-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-22-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-20-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-16-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-14-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-12-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-10-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-8-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-38-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-25-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-18-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-7-0x0000000005280000-0x0000000005295000-memory.dmp

Filesize
84KB

Download
memory/4296-4-0x00000000054C0000-0x00000000056C8000-memory.dmp

Filesize
2.0MB

Download
memory/4296-3-0x0000000073250000-0x000000007393E000-memory.dmp

Filesize
6.9MB

Download
memory/4296-2-0x0000000005300000-0x000000000539C000-memory.dmp

Filesize
624KB

Download
memory/4296-1-0x00000000004C0000-0x0000000000A4A000-memory.dmp

Filesize
5.5MB

Download