stealc | 484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b

General

Target

b8b6d94f2e3b6ae6be5205ef84ae0332.exe
Size

2.7MB
MD5

b8b6d94f2e3b6ae6be5205ef84ae0332
SHA1

5ddf798d3d0a007a030a102e6bfc150e5a08ea83
SHA256

484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b
SHA512

968a81025278fe2598961e1376f4c144dd20979f316231093157dee7364713265675070d67c08510b574966e6178264d7e4d350c15cd5eaa7026ca3e9a2f45b3
SSDEEP

49152:KFzUITu6rv7vkceIsWGIgT+pFeawTkvBt:KKfYv4J0wTQB

Score

10^/10

stealc vidar stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 5 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/388-68-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/388-66-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/388-73-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/388-76-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/388-96-0x0000000000400000-0x0000000000646000-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
Suspicious use of SetThreadContext 1 IoCs

Processes:

b8b6d94f2e3b6ae6be5205ef84ae0332.exe

description pid process target process

PID 1532 set thread context of 388 1532 b8b6d94f2e3b6ae6be5205ef84ae0332.exe MSBuild.exe
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

Processes:

MSBuild.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString MSBuild.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

MSBuild.exe

pid process

388 MSBuild.exe
388 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

b8b6d94f2e3b6ae6be5205ef84ae0332.exe

description pid process

Token: SeDebugPrivilege 1532 b8b6d94f2e3b6ae6be5205ef84ae0332.exe

description	pid	process	target process
PID 1532 set thread context of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe

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

pid	process
388	MSBuild.exe
388	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

b8b6d94f2e3b6ae6be5205ef84ae0332.exe

description	pid	process	target process
PID 1532 wrote to memory of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe
PID 1532 wrote to memory of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe
PID 1532 wrote to memory of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe
PID 1532 wrote to memory of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe
PID 1532 wrote to memory of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe
PID 1532 wrote to memory of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe
PID 1532 wrote to memory of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe
PID 1532 wrote to memory of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe
PID 1532 wrote to memory of 388	1532	b8b6d94f2e3b6ae6be5205ef84ae0332.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\b8b6d94f2e3b6ae6be5205ef84ae0332.exe
"C:\Users\Admin\AppData\Local\Temp\b8b6d94f2e3b6ae6be5205ef84ae0332.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1532

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
2⤵
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:388

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/388-68-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/388-96-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/388-76-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/388-73-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/388-66-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1532-43-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-39-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-11-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-65-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-64-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-4-0x0000000005AB0000-0x0000000005ACC000-memory.dmp

Filesize
112KB

Download
memory/1532-70-0x00000000752A0000-0x0000000075A50000-memory.dmp

Filesize
7.7MB

Download
memory/1532-5-0x00000000752A0000-0x0000000075A50000-memory.dmp

Filesize
7.7MB

Download
memory/1532-61-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-59-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-57-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-55-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-53-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-51-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-49-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-47-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-45-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-0-0x00000000752AE000-0x00000000752AF000-memory.dmp

Filesize
4KB

Download
memory/1532-41-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-13-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-37-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-35-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-33-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-29-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-27-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-25-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-16-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-10-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-6-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-32-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-23-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-21-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-19-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-17-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-7-0x0000000005AB0000-0x0000000005AC5000-memory.dmp

Filesize
84KB

Download
memory/1532-3-0x0000000005CD0000-0x0000000005D68000-memory.dmp

Filesize
608KB

Download
memory/1532-72-0x00000000752A0000-0x0000000075A50000-memory.dmp

Filesize
7.7MB

Download
memory/1532-2-0x0000000005C30000-0x0000000005CCC000-memory.dmp

Filesize
624KB

Download
memory/1532-1-0x0000000000ED0000-0x0000000001182000-memory.dmp

Filesize
2.7MB

Download
memory/1532-97-0x00000000752A0000-0x0000000075A50000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads