stealc | 7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7

General

Target

7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe
Size

1.9MB
MD5

94499b1c20fda69aef65f87bfed21b54
SHA1

a6a3c10af718b8d979c1ef492eb4ee0fb43702f8
SHA256

7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7
SHA512

f752224cb1d6f6c70c0ff89887b1bb6778f6cece01992968136a5b0a0b0c9c7db108457bef31636d1000550102589ce3f00617799fbd315a41b618eaf93acff6
SSDEEP

49152:CdKfTn6vWJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnFtIuoITsdZ

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 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/4004-2-0x00000000041D0000-0x0000000004319000-memory.dmp	family_vidar_v7
behavioral1/memory/1376-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1376-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1376-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1376-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1376-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1376-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/1376-36-0x0000000000400000-0x0000000000646000-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
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

kat441.tmp

pid process

1376 kat441.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

pid	process
1376	kat441.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe

description	pid	process	target process
PID 4004 set thread context of 1376	4004	7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe	kat441.tmp

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

Processes:

kat441.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat441.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat441.tmp

pid process

1376 kat441.tmp
1376 kat441.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat441.tmp

pid	process
1376	kat441.tmp
1376	kat441.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe

description	pid	process	target process
PID 4004 wrote to memory of 1376	4004	7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe	kat441.tmp
PID 4004 wrote to memory of 1376	4004	7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe	kat441.tmp
PID 4004 wrote to memory of 1376	4004	7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe	kat441.tmp
PID 4004 wrote to memory of 1376	4004	7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe	kat441.tmp
PID 4004 wrote to memory of 1376	4004	7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe	kat441.tmp
PID 4004 wrote to memory of 1376	4004	7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe	kat441.tmp
PID 4004 wrote to memory of 1376	4004	7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe	kat441.tmp
PID 4004 wrote to memory of 1376	4004	7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe	kat441.tmp

C:\Users\Admin\AppData\Local\Temp\7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe
"C:\Users\Admin\AppData\Local\Temp\7890a8b6fa3d22281d32700d088c9530c11a703d3dde1f559fde62fc091e92e7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4004

C:\Users\Admin\AppData\Local\Temp\kat441.tmp
C:\Users\Admin\AppData\Local\Temp\kat441.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:1376

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4500,i,9746875443948590908,1444894342962555245,262144 --variations-seed-version --mojo-platform-channel-handle=4180 /prefetch:8
1⤵
PID:752

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat441.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1376-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1376-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1376-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1376-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1376-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1376-20-0x000000001B7F0000-0x000000001BA4F000-memory.dmp

Filesize
2.4MB

Download
memory/1376-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/1376-36-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4004-0-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/4004-2-0x00000000041D0000-0x0000000004319000-memory.dmp

Filesize
1.3MB

Download
memory/4004-10-0x0000000000400000-0x00000000005EC000-memory.dmp

Filesize
1.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads