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 8 IoCs

stealer

resource	yara_rule
behavioral1/memory/4060-2-0x0000000002AB0000-0x0000000002BC0000-memory.dmp	family_vidar_v7
behavioral1/memory/3700-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3700-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3700-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3700-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3700-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3700-33-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3700-34-0x0000000000400000-0x0000000000648000-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
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
3700	kat413F.tmp

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
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 4060 set thread context of 3700	4060	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	85

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	kat413F.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat413F.tmp

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3700	kat413F.tmp
3700	kat413F.tmp
3700	kat413F.tmp
3700	kat413F.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4060 wrote to memory of 3700	4060	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	85
PID 4060 wrote to memory of 3700	4060	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	85
PID 4060 wrote to memory of 3700	4060	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	85
PID 4060 wrote to memory of 3700	4060	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	85
PID 4060 wrote to memory of 3700	4060	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	85
PID 4060 wrote to memory of 3700	4060	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	85
PID 4060 wrote to memory of 3700	4060	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	85
PID 4060 wrote to memory of 3700	4060	a98bbce22cf20d03d964580e539721e41518757ba9a875d0938e8e7d4c60a09c.exe	85

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:4060
- C:\Users\Admin\AppData\Local\Temp\kat413F.tmp
  C:\Users\Admin\AppData\Local\Temp\kat413F.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3700

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

1

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\kat413F.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3700-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3700-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3700-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3700-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3700-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3700-25-0x00000000201C0000-0x000000002041F000-memory.dmp

Filesize
2.4MB

Download
memory/3700-33-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3700-34-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4060-0-0x0000000000800000-0x0000000000801000-memory.dmp

Filesize
4KB

Download
memory/4060-2-0x0000000002AB0000-0x0000000002BC0000-memory.dmp

Filesize
1.1MB

Download
memory/4060-9-0x0000000000400000-0x0000000000641000-memory.dmp

Filesize
2.3MB

Download

Analysis

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