stealc | a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24

General

Target
a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe
Size 1.8MB
Sample240603-nfec3sdh72
SHA256 a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24
MD5 d0430790be25ce4a3a45af0553a3d057
SHA1 b2150a6adc261868c0816d089c840d1a417fe8ef
SHA512 940dead6a4f44a4fca8760dc62b054261799670091d81c8cd996d2515ea85b408cdf52a33b7b0dfe409ea8e1b6e9b605ed9d2a7d67cf15828d144ba68aad4e80
SSDEEP 24576:FBfuZfeq6sdO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFPJtTF+TxMoxc1TU+j+dAzGwlrh
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

stealc vidar discovery spyware 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 7 IoCs

stealer

resource	yara_rule
behavioral2/memory/4700-1-0x0000000003FB0000-0x00000000040F9000-memory.dmp	family_vidar_v7
behavioral2/memory/3708-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3708-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3708-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3708-13-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3708-12-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3708-14-0x0000000000400000-0x0000000000646000-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

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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	kat4585.tmp

Executes dropped EXE 1 IoCs

pid	Process
3708	kat4585.tmp

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 4700 set thread context of 3708	4700	a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.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	kat4585.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2168	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3708	kat4585.tmp
3708	kat4585.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4700 wrote to memory of 3708	4700	a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe	85
PID 4700 wrote to memory of 3708	4700	a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe	85
PID 4700 wrote to memory of 3708	4700	a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe	85
PID 4700 wrote to memory of 3708	4700	a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe	85
PID 4700 wrote to memory of 3708	4700	a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe	85
PID 4700 wrote to memory of 3708	4700	a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe	85
PID 4700 wrote to memory of 3708	4700	a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe	85
PID 4700 wrote to memory of 3708	4700	a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe	85
PID 3708 wrote to memory of 228	3708	kat4585.tmp	88
PID 3708 wrote to memory of 228	3708	kat4585.tmp	88
PID 3708 wrote to memory of 228	3708	kat4585.tmp	88
PID 228 wrote to memory of 2168	228	cmd.exe	90
PID 228 wrote to memory of 2168	228	cmd.exe	90
PID 228 wrote to memory of 2168	228	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe
"C:\Users\Admin\AppData\Local\Temp\a196c14ae3a671eed1e664eeda46769128e7600bd0e4fac96beb9fecb789ea24.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4700
- C:\Users\Admin\AppData\Local\Temp\kat4585.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4585.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3708
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat4585.tmp" & rd /s /q "C:\ProgramData\IJDBKKJKJEBF" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:228
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:2168

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

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

kat4585.tmp

Path C:\Users\Admin\AppData\Local\Temp\kat4585.tmp
Size 861KB
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f
SSDEEP 24576:o0ESdQpglO1CxDyawn27h+9hrlgKQY9SGcZwCdTp:o0RIglO1CuL9VNcaCd9
MD5 SHA1 SHA512 SSDEEP

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memory/3708-4-0x0000000000400000-0x0000000000646000-memory.dmp

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memory/3708-8-0x0000000000400000-0x0000000000646000-memory.dmp

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memory/3708-9-0x0000000000400000-0x0000000000646000-memory.dmp

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memory/3708-13-0x0000000000400000-0x0000000000646000-memory.dmp

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memory/3708-12-0x0000000000400000-0x0000000000646000-memory.dmp

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memory/3708-14-0x0000000000400000-0x0000000000646000-memory.dmp

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memory/4700-0-0x0000000002330000-0x0000000002331000-memory.dmp

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memory/4700-1-0x0000000003FB0000-0x00000000040F9000-memory.dmp

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memory/4700-10-0x0000000000400000-0x00000000005D1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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