stealc | 7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f

Analysis

max time kernel
132s
max time network
306s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
07/06/2024, 00:13

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General

Target
7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe
Size 2.4MB
Sample240607-ah7krafc63
SHA256 7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f
MD5 fdb72109edaad429bf9f89a22f0d7da8
SHA1 f017f48a93eb273c53729c6d59ac03b6123406d7
SHA512 ca5775da00961d4e63e97a56e3a9561459fe68e9ab62a2ae6d2a9c5fedc81329e53460c4060f59f77948685af71cc86218836c1e6d33ae6c82eed9c6e9da87f1
SSDEEP 49152:wQc81KnB/a/hNT/dNYa8aesY3Ot4N7G/:wDta/hNT/dNn0etD/
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

https://t.me/ta904ek
https://steamcommunity.com/profiles/76561199695752269

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 7 IoCs

stealer

resource	yara_rule
behavioral2/memory/2708-10-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2708-8-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2708-4-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2708-25-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2708-26-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2708-43-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/2708-44-0x0000000000400000-0x0000000000649000-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

Executes dropped EXE 1 IoCs

pid	Process
2708	kat8D5B.tmp

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
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 1 IoCs

description	pid	Process	procid_target
PID 4412 set thread context of 2708	4412	7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe	74

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat8D5B.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2708	kat8D5B.tmp
2708	kat8D5B.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4412 wrote to memory of 2708	4412	7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe	74
PID 4412 wrote to memory of 2708	4412	7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe	74
PID 4412 wrote to memory of 2708	4412	7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe	74
PID 4412 wrote to memory of 2708	4412	7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe	74
PID 4412 wrote to memory of 2708	4412	7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe	74
PID 4412 wrote to memory of 2708	4412	7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe	74
PID 4412 wrote to memory of 2708	4412	7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe	74
PID 4412 wrote to memory of 2708	4412	7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe	74

C:\Users\Admin\AppData\Local\Temp\7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe
"C:\Users\Admin\AppData\Local\Temp\7b056209562958d74882da961cad28601113fc5f4729a4f3823da50f722da78f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4412
- C:\Users\Admin\AppData\Local\Temp\kat8D5B.tmp
  C:\Users\Admin\AppData\Local\Temp\kat8D5B.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2708

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

kat8D5B.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat8D5B.tmp
Size 448KB
SHA256 8cdc50bc308edd6d0f70d7c8203f0ef469daaa62ae801a00c93e6b9160fef772
MD5 d7d3e9e68f500a5362ef855382d5934b
SHA1 740495877cbcda9c61c8eb1ce3cb0c0f20738a81
SHA512 512f5d5764050274d5beb6c966c787eb50a9850ec4c4886cda14f3a912dc627d29d2cac5db7f825500041a47ce65ecc4e8f728dc934c748f6575ae17d4c2cf89
SSDEEP 12288:WNt0EArdQ0h4vglO1CYcRxJ8I4awnQb7hcr9h5Jl4:o0ESdQpglO1CxDyawn27h+9hrl4
MD5 SHA1 SHA512 SSDEEP

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kat8D5B.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat8D5B.tmp
Size 192KB
SHA256 0bc85276b24e039598ebd6b0ab1f702896e3d8b91b72f135ffc107ca1da01db7
MD5 e0220c91e870805066b20f9332d42a01
SHA1 227b994b790d3a08551937d1f1cf1c01a4d9a0e3
SHA512 c968ba57edf70d3f581292d88c953b81070353d720eb28ba911f94b54c5f04f1cba0be7756fbcbbbe5f1f44cbefeaaab095a4cfee48be0578c6cdf1bf1764766
SSDEEP 3072:pzx8uB6Ncc/Kw34XC9WvIhW9YPgDE79Nz4MPLNnG7yBODqY+L9Iz0HvHRme1+EQo:rCNwCj0IX/dG7MOd+Fv5+Jo
MD5 SHA1 SHA512 SSDEEP

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memory/2708-8-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2708-4-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2708-10-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2708-25-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2708-26-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2708-28-0x00000000283C0000-0x000000002861F000-memory.dmp

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memory/2708-43-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/2708-44-0x0000000000400000-0x0000000000649000-memory.dmp

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memory/4412-0-0x00000000007F0000-0x00000000007F1000-memory.dmp

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memory/4412-9-0x0000000000400000-0x0000000000663000-memory.dmp

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memory/4412-2-0x0000000003F60000-0x00000000040AC000-memory.dmp

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