stealc | 7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553

General

Target

7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe
Size

401KB
MD5

cb907b20ee4fb4389d25989d7de466e8
SHA1

4d63141c71e834e81c5f57f90f663c409edf3a41
SHA256

7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553
SHA512

81c3f8e3362a565a426710b54e4f2b64165b764635818b788f43824b3f0cdd2dc354cbdb6ff945bdfe42bd4ade7ed05b721f978faa5af3d6df71cf6b81f13fe2
SSDEEP

12288:jdI4y5LNCOuGcOq1H6Bvbw1tiNPUtIbsKRHo8:jq40NKaDiyPDI

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

Detect Vidar Stealer 5 IoCs

stealer

resource	yara_rule
behavioral2/memory/4684-1-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4684-5-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4684-3-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4684-6-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4684-7-0x0000000000400000-0x0000000000648000-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
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
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 3692 set thread context of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1744	3692	WerFault.exe	76

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	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4488	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4684	RegAsm.exe
4684	RegAsm.exe
4684	RegAsm.exe
4684	RegAsm.exe
4684	RegAsm.exe
4684	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3692 wrote to memory of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77
PID 3692 wrote to memory of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77
PID 3692 wrote to memory of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77
PID 3692 wrote to memory of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77
PID 3692 wrote to memory of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77
PID 3692 wrote to memory of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77
PID 3692 wrote to memory of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77
PID 3692 wrote to memory of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77
PID 3692 wrote to memory of 4684	3692	7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe	77
PID 4684 wrote to memory of 2272	4684	RegAsm.exe	82
PID 4684 wrote to memory of 2272	4684	RegAsm.exe	82
PID 4684 wrote to memory of 2272	4684	RegAsm.exe	82
PID 2272 wrote to memory of 4488	2272	cmd.exe	84
PID 2272 wrote to memory of 4488	2272	cmd.exe	84
PID 2272 wrote to memory of 4488	2272	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe
"C:\Users\Admin\AppData\Local\Temp\7a95ae3b370d318bff008a07fddf1b6deb1beb78fa9e021c5c9f106d1149b553.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3692
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4684
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" & rd /s /q "C:\ProgramData\BKFBAKFCBFHI" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2272
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4488
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3692 -s 288
  2⤵
  - Program crash
  PID:1744

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3692 -ip 3692
1⤵
PID:1212

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3692-0-0x00000000015F0000-0x00000000015F1000-memory.dmp

Filesize
4KB

Download
memory/4684-1-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4684-5-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4684-3-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4684-6-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4684-7-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

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