stealc | 3a6f7c07d5fc5aa914c12b29e69d2598f5cd5923db2615394149e085c6257c58

General

Target

0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe
Size

406KB
MD5

ca9a95daa96005c43b2402094800081a
SHA1

82d78d90972f4e7d3494ff9bab33e6b3d65b82ed
SHA256

0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274
SHA512

b9093fb0ec4d1888a2c07630fe07ae1c28cd61289611a8965a8b1ab5c83a59fae9e690f1fd086290988250efb4e5dcd322ff5f355402863004c21ac0f05a22a1
SSDEEP

6144:jSuxvfHBpjCvTorgayosTkSqaN5K2lsmYpK8SMqvWvbbr2DCXAckx64A1vgwt4:jSIBpjCvMUXSK8SMqvWTPwCXAsh1o84

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

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 11 IoCs

stealer

resource	yara_rule
behavioral2/memory/1492-1-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-6-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-5-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-18-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-19-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-36-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-37-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-53-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-54-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-68-0x0000000000400000-0x0000000000649000-memory.dmp	family_vidar_v7
behavioral2/memory/1492-69-0x0000000000400000-0x0000000000649000-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

Checks computer location settings 2 TTPs 1 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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	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
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 1 IoCs

description	pid	Process	procid_target
PID 920 set thread context of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85

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

System Information Discovery
T1082

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	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3684	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1492	RegAsm.exe
1492	RegAsm.exe
1492	RegAsm.exe
1492	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 920 wrote to memory of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85
PID 920 wrote to memory of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85
PID 920 wrote to memory of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85
PID 920 wrote to memory of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85
PID 920 wrote to memory of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85
PID 920 wrote to memory of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85
PID 920 wrote to memory of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85
PID 920 wrote to memory of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85
PID 920 wrote to memory of 1492	920	0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe	85
PID 1492 wrote to memory of 3604	1492	RegAsm.exe	93
PID 1492 wrote to memory of 3604	1492	RegAsm.exe	93
PID 1492 wrote to memory of 3604	1492	RegAsm.exe	93
PID 3604 wrote to memory of 3684	3604	cmd.exe	95
PID 3604 wrote to memory of 3684	3604	cmd.exe	95
PID 3604 wrote to memory of 3684	3604	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe
"C:\Users\Admin\AppData\Local\Temp\0260ea7f3ee2a5b7cc6d2b648d7850ec0f96b70674ab0f9386aa6d07f59d1274.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:920
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks computer location settings
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1492
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\GIJDGCAEBFII" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3604
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:3684

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/920-0-0x0000000000CC0000-0x0000000000CC1000-memory.dmp

Filesize
4KB

Download
memory/920-2-0x0000000000CC0000-0x0000000000CC1000-memory.dmp

Filesize
4KB

Download
memory/1492-1-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-6-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-5-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-18-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-19-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-21-0x000000001B4A0000-0x000000001B6FF000-memory.dmp

Filesize
2.4MB

Download
memory/1492-36-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-37-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-53-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-54-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-68-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download
memory/1492-69-0x0000000000400000-0x0000000000649000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads