stealc | a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c

General

Target

a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe
Size

2.2MB
MD5

90e552fbdc79f34679a5346c2b07ca1b
SHA1

984170196a268fee363d1f3105cc8d5b3d21c67d
SHA256

a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c
SHA512

faf7e541f0292b2554542f9c0e948ace8e73340155881b552fa4e8570a6d4447a7cd73c0a01e7c1d42ee2e18f0886339656f7fd243d68fa7c76aeb234a9351c4
SSDEEP

49152:lAgY7fvVtbBaxmcqMTBeutKQl+bH4JbjzzEBETT29YMST:llY7nTMBTBeutKQl+bYxzIBA6uMST

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 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/4656-1-0x0000000004030000-0x0000000004140000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4376-17-0x0000000000400000-0x0000000000648000-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

Executes dropped EXE 1 IoCs

pid	Process
4376	kat9C40.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 4656 set thread context of 4376	4656	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	77

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 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	kat9C40.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat9C40.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
736	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4376	kat9C40.tmp
4376	kat9C40.tmp
4376	kat9C40.tmp
4376	kat9C40.tmp
4376	kat9C40.tmp
4376	kat9C40.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4656 wrote to memory of 4376	4656	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	77
PID 4656 wrote to memory of 4376	4656	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	77
PID 4656 wrote to memory of 4376	4656	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	77
PID 4656 wrote to memory of 4376	4656	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	77
PID 4656 wrote to memory of 4376	4656	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	77
PID 4656 wrote to memory of 4376	4656	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	77
PID 4656 wrote to memory of 4376	4656	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	77
PID 4656 wrote to memory of 4376	4656	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	77
PID 4376 wrote to memory of 4284	4376	kat9C40.tmp	79
PID 4376 wrote to memory of 4284	4376	kat9C40.tmp	79
PID 4376 wrote to memory of 4284	4376	kat9C40.tmp	79
PID 4284 wrote to memory of 736	4284	cmd.exe	81
PID 4284 wrote to memory of 736	4284	cmd.exe	81
PID 4284 wrote to memory of 736	4284	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe
"C:\Users\Admin\AppData\Local\Temp\a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4656
- C:\Users\Admin\AppData\Local\Temp\kat9C40.tmp
  C:\Users\Admin\AppData\Local\Temp\kat9C40.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4376
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat9C40.tmp" & rd /s /q "C:\ProgramData\EBFBFBFIIJDA" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4284
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:736

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

C:\Users\Admin\AppData\Local\Temp\kat9C40.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4376-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4376-17-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4656-0-0x00000000024B0000-0x00000000024B1000-memory.dmp

Filesize
4KB

Download
memory/4656-1-0x0000000004030000-0x0000000004140000-memory.dmp

Filesize
1.1MB

Download
memory/4656-9-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download

Analysis

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