stealc | 12ca4ad8cd613c8d086cd39a5c6e787c12209f2271ba850817b72eae3cd559da

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
submitted
30-11-2024 21:16

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General

Target

InstalIеr-x86/TTDesktop18.exe

Score

10^/10

stealc vidar 41d35cbb974bc2d1287dcd4381b4a2a8 discovery execution stealer

Malware Config

Extracted

Family

vidar

Version

11.8

Botnet

41d35cbb974bc2d1287dcd4381b4a2a8

https://t.me/fu4chmo

https://steamcommunity.com/profiles/76561199802540894

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Safari/605.1.15 Ddg/17.6

Signatures

Detect Vidar Stealer 3 IoCs

stealer

resource	yara_rule
behavioral1/files/0x000b000000023b6c-137.dat	family_vidar_v7
behavioral1/memory/4436-143-0x0000000000C40000-0x0000000000E99000-memory.dmp	family_vidar_v7
behavioral1/memory/4436-159-0x0000000000C40000-0x0000000000E99000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Stealc family
stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Vidar family
vidar

Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3496	powershell.exe
3140	powershell.exe
2192	powershell.exe
4336	powershell.exe
956	powershell.exe
5096	powershell.exe

Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	TTDesktop18.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	ZrUXUunO.exe

Executes dropped EXE 1 IoCs

pid	Process
4436	ZrUXUunO.exe

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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
19	raw.githubusercontent.com
20	raw.githubusercontent.com

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 10 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	TTDesktop18.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ZrUXUunO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.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 opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ZrUXUunO.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ZrUXUunO.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1376	timeout.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
956	powershell.exe
956	powershell.exe
5096	powershell.exe
5096	powershell.exe
3496	powershell.exe
3496	powershell.exe
3140	powershell.exe
3140	powershell.exe
2192	powershell.exe
2192	powershell.exe
4336	powershell.exe
4336	powershell.exe
4436	ZrUXUunO.exe
4436	ZrUXUunO.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	956	powershell.exe
Token: SeDebugPrivilege	5096	powershell.exe
Token: SeDebugPrivilege	3496	powershell.exe
Token: SeDebugPrivilege	3140	powershell.exe
Token: SeDebugPrivilege	2192	powershell.exe
Token: SeDebugPrivilege	4336	powershell.exe
Token: SeDebugPrivilege	3948	TTDesktop18.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 3948 wrote to memory of 956	3948	TTDesktop18.exe	83
PID 3948 wrote to memory of 956	3948	TTDesktop18.exe	83
PID 3948 wrote to memory of 956	3948	TTDesktop18.exe	83
PID 956 wrote to memory of 5096	956	powershell.exe	85
PID 956 wrote to memory of 5096	956	powershell.exe	85
PID 956 wrote to memory of 5096	956	powershell.exe	85
PID 3948 wrote to memory of 3496	3948	TTDesktop18.exe	86
PID 3948 wrote to memory of 3496	3948	TTDesktop18.exe	86
PID 3948 wrote to memory of 3496	3948	TTDesktop18.exe	86
PID 3496 wrote to memory of 3140	3496	powershell.exe	88
PID 3496 wrote to memory of 3140	3496	powershell.exe	88
PID 3496 wrote to memory of 3140	3496	powershell.exe	88
PID 3948 wrote to memory of 2192	3948	TTDesktop18.exe	89
PID 3948 wrote to memory of 2192	3948	TTDesktop18.exe	89
PID 3948 wrote to memory of 2192	3948	TTDesktop18.exe	89
PID 2192 wrote to memory of 4336	2192	powershell.exe	93
PID 2192 wrote to memory of 4336	2192	powershell.exe	93
PID 2192 wrote to memory of 4336	2192	powershell.exe	93
PID 3948 wrote to memory of 4436	3948	TTDesktop18.exe	97
PID 3948 wrote to memory of 4436	3948	TTDesktop18.exe	97
PID 3948 wrote to memory of 4436	3948	TTDesktop18.exe	97
PID 4436 wrote to memory of 2112	4436	ZrUXUunO.exe	102
PID 4436 wrote to memory of 2112	4436	ZrUXUunO.exe	102
PID 4436 wrote to memory of 2112	4436	ZrUXUunO.exe	102
PID 2112 wrote to memory of 1376	2112	cmd.exe	104
PID 2112 wrote to memory of 1376	2112	cmd.exe	104
PID 2112 wrote to memory of 1376	2112	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\InstalIеr-x86\TTDesktop18.exe
"C:\Users\Admin\AppData\Local\Temp\InstalIеr-x86\TTDesktop18.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3948
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" powershell -Command "Add-MpPreference -ExclusionPath 'C:\ADsBNyVCUs'"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:956
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionPath C:\ADsBNyVCUs
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5096
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" powershell -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3496
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionPath C:\Users
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3140
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" powershell -Command "Add-MpPreference -ExclusionPath 'C:\Windows'"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2192
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command Add-MpPreference -ExclusionPath C:\Windows
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4336
- C:\ADsBNyVCUs\ZrUXUunO.exe
  "C:\ADsBNyVCUs\ZrUXUunO.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4436
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\ADsBNyVCUs\ZrUXUunO.exe" & rd /s /q "C:\ProgramData\ECGIIIDAKJDH" & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2112
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:1376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\ADsBNyVCUs\ZrUXUunO.exe

Filesize
275KB

MD5
0a7b3454fdad8431bd3523648c915665

SHA1
800a97a7c1a92a92cac76afc1fe5349895ee5287

SHA256
baf217d7bb8f3a86856def6891638318a94ed5d7082149d4dd4cb755d90d86ce

SHA512
020e45eaeee083d6739155d9a821ab54dd07f1320b8efb73871ee5d29188122fdbb7d39b34a8b3694a8b0c08ae1801ec370e40ff8d837c9190a72905f26baff9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
11KB

MD5
0007fa6dbfa8d02c1e04ee657ff968cd

SHA1
d80a81b0fdfae0b5fe3c230019c529dd0b8a2686

SHA256
67a4e2db6a1e4c43c7066b5ed4a3cac08156a5518465a4d0432b5bf2e70b7dfd

SHA512
ea119f69565b6880b94b40be7887c4b1206c460c5cd13f7389deb23cbecc0c22cb42be41160a84a36bde6f0de684a4c99d91d973b14b0e059f3a925d568f6708

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
663B

MD5
59a2d4c3f57a590a08854163177ad20f

SHA1
2eca1822e74128b7250e0d4370fc77dba14f92c4

SHA256
04746cbd01a3f738377998f399e4d6d48657bf7cc283719d636bfb92ecce61be

SHA512
dc31e1a681c5d20725f653e11b128de46622b76766af0e4e8ee3ec5c2a922305bb7939760634decda895ba252e6d5a8d86e174006623ac729ffd66431a609245

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
11KB

MD5
ee903eff46a05e922e33bd01b6d0ee53

SHA1
4f3dff37da330811378fd8d041043c943559d433

SHA256
7304a154ab726d0f751bf38199f07757f6599a4b6b8764467f0235f8ad3dd5fc

SHA512
9189ed97a12b9df3a78782ac1f16e269330e883a346a0e7267a997486cf16182df07cee1ce65f0459edbddc8f1191fe3cbde57b49d9995a4b87b76e8566f8b86

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
11KB

MD5
cbdc900d6f6a55bc52157be4d8880074

SHA1
18d273ac72891e95e3244b4cfc9c9d8039c00bbe

SHA256
c9779d347dfdd1225fee9ec00fb02f810b6f113d98e1da859f012f10c6d2a12b

SHA512
a63387f5aa34739f1fd5932a49aa8db2c53490d1e3ae73f9ddebb0591c204f90ed1e431f21306a4c080b93052c4c883212b63be59e9fdb5ad9d06aa6ec4b7c8f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sef1p3x0.4ta.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/956-65-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/956-7-0x0000000005CD0000-0x0000000005D36000-memory.dmp

Filesize
408KB

Download
memory/956-8-0x0000000005DB0000-0x0000000005E16000-memory.dmp

Filesize
408KB

Download
memory/956-15-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/956-19-0x0000000005EA0000-0x00000000061F4000-memory.dmp

Filesize
3.3MB

Download
memory/956-20-0x00000000064B0000-0x00000000064CE000-memory.dmp

Filesize
120KB

Download
memory/956-21-0x00000000064F0000-0x000000000653C000-memory.dmp

Filesize
304KB

Download
memory/956-5-0x0000000005C30000-0x0000000005C52000-memory.dmp

Filesize
136KB

Download
memory/956-4-0x0000000005600000-0x0000000005C28000-memory.dmp

Filesize
6.2MB

Download
memory/956-3-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/956-2-0x0000000004F20000-0x0000000004F56000-memory.dmp

Filesize
216KB

Download
memory/956-6-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/2192-108-0x00000000062A0000-0x00000000065F4000-memory.dmp

Filesize
3.3MB

Download
memory/3140-86-0x0000000070250000-0x000000007029C000-memory.dmp

Filesize
304KB

Download
memory/3496-75-0x0000000005750000-0x0000000005AA4000-memory.dmp

Filesize
3.3MB

Download
memory/3948-132-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/3948-46-0x000000007445E000-0x000000007445F000-memory.dmp

Filesize
4KB

Download
memory/3948-1-0x0000000000700000-0x000000000070A000-memory.dmp

Filesize
40KB

Download
memory/3948-145-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/3948-0-0x000000007445E000-0x000000007445F000-memory.dmp

Filesize
4KB

Download
memory/4336-119-0x0000000070250000-0x000000007029C000-memory.dmp

Filesize
304KB

Download
memory/4436-143-0x0000000000C40000-0x0000000000E99000-memory.dmp

Filesize
2.3MB

Download
memory/4436-159-0x0000000000C40000-0x0000000000E99000-memory.dmp

Filesize
2.3MB

Download
memory/5096-49-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/5096-58-0x0000000007F20000-0x0000000007F28000-memory.dmp

Filesize
32KB

Download
memory/5096-57-0x0000000007F40000-0x0000000007F5A000-memory.dmp

Filesize
104KB

Download
memory/5096-61-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/5096-56-0x0000000007E40000-0x0000000007E54000-memory.dmp

Filesize
80KB

Download
memory/5096-55-0x0000000007E30000-0x0000000007E3E000-memory.dmp

Filesize
56KB

Download
memory/5096-54-0x0000000007E00000-0x0000000007E11000-memory.dmp

Filesize
68KB

Download
memory/5096-53-0x0000000007E80000-0x0000000007F16000-memory.dmp

Filesize
600KB

Download
memory/5096-52-0x0000000007C70000-0x0000000007C7A000-memory.dmp

Filesize
40KB

Download
memory/5096-34-0x0000000006EA0000-0x0000000006ED2000-memory.dmp

Filesize
200KB

Download
memory/5096-35-0x0000000070250000-0x000000007029C000-memory.dmp

Filesize
304KB

Download
memory/5096-51-0x0000000007C00000-0x0000000007C1A000-memory.dmp

Filesize
104KB

Download
memory/5096-50-0x0000000008250000-0x00000000088CA000-memory.dmp

Filesize
6.5MB

Download
memory/5096-36-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/5096-48-0x00000000078B0000-0x0000000007953000-memory.dmp

Filesize
652KB

Download
memory/5096-47-0x0000000006E80000-0x0000000006E9E000-memory.dmp

Filesize
120KB

Download
memory/5096-29-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/5096-23-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download
memory/5096-22-0x0000000074450000-0x0000000074C00000-memory.dmp

Filesize
7.7MB

Download