stealc | 91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4

Analysis

max time kernel
149s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
13-09-2024 09:57

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General

Target

91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe
Size

206KB
MD5

68076ff4fb08f203da72e47f536db2d3
SHA1

c7d2df2f68fefa1b3b9ddc61809966eaa6daef49
SHA256

91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4
SHA512

f400d2424839ae1ce5a362cddc759a46be3e0528d45ade309a182c202a03534acb24e90b9a02d17865c6f9a828d91d9d90927d0734ec8ffd8452a10b414ab5d6
SSDEEP

3072:0lyVDc5YYBO1w3EiWJ7UYsYz3PLk3l6z0u5xTewBj8L5R3yz2VlI/8agaOFrMKYp:WEw0iWhWifM6z0uHqwJS5xne8XZkEO

Score

10^/10

stealc vidar default credential_access discovery spyware stealer

Malware Config

Extracted

Family

stealc

Botnet

default

http://46.8.231.109

Attributes

url_path
/c4754d4f680ead72.php

Extracted

Family

vidar

https://t.me/edm0d

https://steamcommunity.com/profiles/76561199768374681

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 OPR/110.0.0.0

Signatures

Detect Vidar Stealer 7 IoCs

stealer

resource	yara_rule
behavioral2/memory/4812-111-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/4812-115-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/4812-113-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/4812-133-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/4812-134-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/4812-149-0x0000000000400000-0x0000000000657000-memory.dmp	family_vidar_v7
behavioral2/memory/4812-150-0x0000000000400000-0x0000000000657000-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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2360	AdminFIJECAEHJJ.exe
3248	AdminEBFBKFBGII.exe

Loads dropped DLL 2 IoCs

pid	Process
3764	RegAsm.exe
3764	RegAsm.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
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
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

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 3 IoCs

description	pid	Process	procid_target
PID 3312 set thread context of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 2360 set thread context of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 3248 set thread context of 4812	3248	AdminEBFBKFBGII.exe	94

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 8 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	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AdminFIJECAEHJJ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AdminEBFBKFBGII.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Checks processor information in registry 2 TTPs 4 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	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3764	RegAsm.exe
3764	RegAsm.exe
3764	RegAsm.exe
3764	RegAsm.exe
4812	RegAsm.exe
4812	RegAsm.exe
4812	RegAsm.exe
4812	RegAsm.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 3312 wrote to memory of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 3312 wrote to memory of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 3312 wrote to memory of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 3312 wrote to memory of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 3312 wrote to memory of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 3312 wrote to memory of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 3312 wrote to memory of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 3312 wrote to memory of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 3312 wrote to memory of 3764	3312	91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe	82
PID 3764 wrote to memory of 3888	3764	RegAsm.exe	83
PID 3764 wrote to memory of 3888	3764	RegAsm.exe	83
PID 3764 wrote to memory of 3888	3764	RegAsm.exe	83
PID 3888 wrote to memory of 2360	3888	cmd.exe	85
PID 3888 wrote to memory of 2360	3888	cmd.exe	85
PID 3888 wrote to memory of 2360	3888	cmd.exe	85
PID 2360 wrote to memory of 2228	2360	AdminFIJECAEHJJ.exe	87
PID 2360 wrote to memory of 2228	2360	AdminFIJECAEHJJ.exe	87
PID 2360 wrote to memory of 2228	2360	AdminFIJECAEHJJ.exe	87
PID 2360 wrote to memory of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 2360 wrote to memory of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 2360 wrote to memory of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 2360 wrote to memory of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 2360 wrote to memory of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 2360 wrote to memory of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 2360 wrote to memory of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 2360 wrote to memory of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 2360 wrote to memory of 3528	2360	AdminFIJECAEHJJ.exe	88
PID 3764 wrote to memory of 1936	3764	RegAsm.exe	89
PID 3764 wrote to memory of 1936	3764	RegAsm.exe	89
PID 3764 wrote to memory of 1936	3764	RegAsm.exe	89
PID 1936 wrote to memory of 3248	1936	cmd.exe	91
PID 1936 wrote to memory of 3248	1936	cmd.exe	91
PID 1936 wrote to memory of 3248	1936	cmd.exe	91
PID 3248 wrote to memory of 1424	3248	AdminEBFBKFBGII.exe	93
PID 3248 wrote to memory of 1424	3248	AdminEBFBKFBGII.exe	93
PID 3248 wrote to memory of 1424	3248	AdminEBFBKFBGII.exe	93
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94
PID 3248 wrote to memory of 4812	3248	AdminEBFBKFBGII.exe	94

C:\Users\Admin\AppData\Local\Temp\91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe
"C:\Users\Admin\AppData\Local\Temp\91f03b0ae9dcae932e3043b7cb19cf52541504e9a4510501d9cb2f1ddd6d10f4.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3312
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3764
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\AdminFIJECAEHJJ.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3888
  - - C:\Users\AdminFIJECAEHJJ.exe
      "C:\Users\AdminFIJECAEHJJ.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2360
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        
        PID:2228
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:3528
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\AdminEBFBKFBGII.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1936
  - - C:\Users\AdminEBFBKFBGII.exe
      "C:\Users\AdminEBFBKFBGII.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3248
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        
        PID:1424
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        5⤵
        System Location Discovery: System Language Discovery
        Checks processor information in registry
        Suspicious behavior: EnumeratesProcesses
        
        PID:4812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\mozglue.dll

Filesize
593KB

MD5
c8fd9be83bc728cc04beffafc2907fe9

SHA1
95ab9f701e0024cedfbd312bcfe4e726744c4f2e

SHA256
ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

SHA512
fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

Download Submit
C:\ProgramData\nss3.dll

Filesize
2.0MB

MD5
1cc453cdf74f31e4d913ff9c10acdde2

SHA1
6e85eae544d6e965f15fa5c39700fa7202f3aafe

SHA256
ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

SHA512
dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

Download Submit
C:\Users\AdminEBFBKFBGII.exe

Filesize
282KB

MD5
f31d21c664ded57509d1e2e1e2c73098

SHA1
58abbe186f2324eca451d3866b63ceeb924d3391

SHA256
44d0e959d4a9c31cc02dc12dacdf34b4fa4d0d9eda5a4c6d03dfff72045cda8b

SHA512
5aff27d9ffb0568072f52e51679bbd9cb3c063d7bb1c3fe658c10241b633a66738d6bd7ee2111e065a1b93098bdaa1e5da6b9b8d063fe3f1ff1de7d71d32aa53

Download Submit
C:\Users\AdminFIJECAEHJJ.exe

Filesize
321KB

MD5
5831ebced7b72207603126ed67601c28

SHA1
2ba46b54074675cc132b2c4eb6f310b21c7d7041

SHA256
02097348db100eb22d46dc474a1078b5ddbb56ee916cc81f24fadd0a6938ac58

SHA512
a9924ef2373851156d981bc3c5b5d533e8b510abf6c3f12e62af0c019e740f0d077efb8f7f93699d797335df33013c72fd9ead3b2253dd82f14b7b330faacb8e

Download Submit
memory/2360-151-0x0000000072140000-0x00000000728F1000-memory.dmp

Filesize
7.7MB

Download
memory/2360-99-0x0000000072140000-0x00000000728F1000-memory.dmp

Filesize
7.7MB

Download
memory/2360-89-0x0000000000A90000-0x0000000000AE4000-memory.dmp

Filesize
336KB

Download
memory/2360-90-0x000000007214E000-0x000000007214F000-memory.dmp

Filesize
4KB

Download
memory/3248-107-0x0000000000B90000-0x0000000000BDA000-memory.dmp

Filesize
296KB

Download
memory/3312-9-0x0000000074B60000-0x0000000075311000-memory.dmp

Filesize
7.7MB

Download
memory/3312-130-0x0000000074B60000-0x0000000075311000-memory.dmp

Filesize
7.7MB

Download
memory/3312-1-0x0000000000170000-0x00000000001A8000-memory.dmp

Filesize
224KB

Download
memory/3312-0-0x0000000074B6E000-0x0000000074B6F000-memory.dmp

Filesize
4KB

Download
memory/3528-100-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/3528-93-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/3528-97-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/3764-4-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3764-11-0x0000000061E00000-0x0000000061EF3000-memory.dmp

Filesize
972KB

Download
memory/3764-10-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3764-110-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/3764-7-0x0000000000400000-0x0000000000643000-memory.dmp

Filesize
2.3MB

Download
memory/4812-115-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/4812-113-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/4812-133-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/4812-134-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/4812-136-0x00000000222B0000-0x000000002250F000-memory.dmp

Filesize
2.4MB

Download
memory/4812-149-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/4812-150-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download
memory/4812-111-0x0000000000400000-0x0000000000657000-memory.dmp

Filesize
2.3MB

Download