stealc | 5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08

General

Target

5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe
Size

2.0MB
MD5

7de9cc7acfb895495a3242c6b10629aa
SHA1

ea6f3b1ed1a4f583cb18f0f94b5f86814d3a4d81
SHA256

5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08
SHA512

d5e63fbdd21b81ac8548711d1aeedbf20031736c9fc99939b2e902832bb4ff8539a00f23ee57cfc9bcc0387c5964785dba8fd426164da629b06919ebb0a01c7d
SSDEEP

49152:IFno/jfcJtTF+TxMoxc1TU+j+dAzGkiT:IFno/j0tIuoITsdZT

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/4580-2-0x0000000004120000-0x0000000004269000-memory.dmp	family_vidar_v7
behavioral2/memory/3792-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3792-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3792-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3792-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3792-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3792-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3792-21-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3792-24-0x0000000000400000-0x0000000000646000-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	kat4C7A.tmp

Executes dropped EXE 1 IoCs

pid	Process
3792	kat4C7A.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 4580 set thread context of 3792	4580	5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe	86

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	kat4C7A.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4052	timeout.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3792	kat4C7A.tmp
3792	kat4C7A.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4580 wrote to memory of 3792	4580	5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe	86
PID 4580 wrote to memory of 3792	4580	5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe	86
PID 4580 wrote to memory of 3792	4580	5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe	86
PID 4580 wrote to memory of 3792	4580	5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe	86
PID 4580 wrote to memory of 3792	4580	5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe	86
PID 4580 wrote to memory of 3792	4580	5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe	86
PID 4580 wrote to memory of 3792	4580	5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe	86
PID 4580 wrote to memory of 3792	4580	5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe	86
PID 3792 wrote to memory of 400	3792	kat4C7A.tmp	99
PID 3792 wrote to memory of 400	3792	kat4C7A.tmp	99
PID 3792 wrote to memory of 400	3792	kat4C7A.tmp	99
PID 400 wrote to memory of 4052	400	cmd.exe	101
PID 400 wrote to memory of 4052	400	cmd.exe	101
PID 400 wrote to memory of 4052	400	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe
"C:\Users\Admin\AppData\Local\Temp\5b976920a8ac0a3b84b5ab38b00582b3a363fcfbef190ed972894dd0773ddc08.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4580
- C:\Users\Admin\AppData\Local\Temp\kat4C7A.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4C7A.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3792
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat4C7A.tmp" & rd /s /q "C:\ProgramData\DHJECFCGHIDG" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:400
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4052

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

C:\Users\Admin\AppData\Local\Temp\kat4C7A.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3792-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3792-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3792-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3792-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3792-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3792-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3792-21-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3792-24-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4580-0-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/4580-2-0x0000000004120000-0x0000000004269000-memory.dmp

Filesize
1.3MB

Download
memory/4580-10-0x0000000000400000-0x0000000000602000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads