stealc | 484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
28-05-2024 01:10

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General

Target

484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.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

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 2 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/2452-80-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2452-305-0x0000000000400000-0x0000000000646000-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

Detect binaries embedding considerable number of MFA browser extension IDs. 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2452-305-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_MFA_Browser_Extension_IDs

Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2452-305-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_Embedded_Crypto_Wallet_Browser_Extension_IDs

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2452-80-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2452-305-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2452-305-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2452-80-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
behavioral1/memory/2452-305-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

Detects executables containing potential Windows Defender anti-emulation checks 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2452-80-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation
behavioral1/memory/2452-305-0x0000000000400000-0x0000000000646000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WindDefender_AntiEmaulation

Downloads MZ/PE file

Suspicious use of SetThreadContext 1 IoCs

Processes:

484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe

description	pid	process	target process
PID 2156 set thread context of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.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 1 IoCs

Processes:

MSBuild.exe

pid process

2452 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe

description pid process

Token: SeDebugPrivilege 2156 484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe

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

pid	process
2452	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe

description	pid	process	target process
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe
PID 2156 wrote to memory of 2452	2156	484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe
"C:\Users\Admin\AppData\Local\Temp\484de446e05081a326b443adf561111d8d550e0309639007eae2e4c8bdee436b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2156

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:2452

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
344B

MD5
d16ed7356466732ef6bef61c370649eb

SHA1
ea1fccb97c372371eaeefc40acbb32b9c360d095

SHA256
8f92956637c621526f233e2d57c6ccf2e1d92be9db2b3adf80b489d832c14953

SHA512
49b7ba66e39914f272aea22312bd60f9aabd8b39a5889640c1da7d3901359cb2806494b45ed0065bb9cd6b9babefc94053b3706d4c0036d0f5a58e84bf8b7695

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar19AF.tmp
Filesize
177KB

MD5
435a9ac180383f9fa094131b173a2f7b

SHA1
76944ea657a9db94f9a4bef38f88c46ed4166983

SHA256
67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

SHA512
1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

Download Submit
memory/2156-58-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-14-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-52-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-6-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-8-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-10-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-12-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-54-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-16-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-18-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-22-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-24-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-56-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-20-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-28-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-34-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-64-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-62-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-60-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-0-0x000000007469E000-0x000000007469F000-memory.dmp

Filesize
4KB

Download
memory/2156-26-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-4-0x0000000000510000-0x000000000052C000-memory.dmp

Filesize
112KB

Download
memory/2156-5-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-50-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-48-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-46-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-44-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-43-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-40-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-38-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-36-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-65-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2156-32-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-30-0x0000000000510000-0x0000000000525000-memory.dmp

Filesize
84KB

Download
memory/2156-1-0x0000000001170000-0x0000000001422000-memory.dmp

Filesize
2.7MB

Download
memory/2156-2-0x0000000001080000-0x0000000001118000-memory.dmp

Filesize
608KB

Download
memory/2156-3-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2156-81-0x0000000074690000-0x0000000074D7E000-memory.dmp

Filesize
6.9MB

Download
memory/2452-80-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2452-66-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2452-68-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2452-305-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download