stealc | 9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43

General

Target

9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe
Size

2.0MB
MD5

3a52d37f4e4c3ac752376cfbcc26755d
SHA1

b8bb2de877a135c8fb4e50a297e78aefc81939e9
SHA256

9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43
SHA512

e8abe45358606273cf82eccd4dfe9f8ef6dfa03b400f15e79db99988fb3f5faed77d228cbf30b3d3855b3ee0f35425d2c089e6fe225cb7d584afbd2deab42aa6
SSDEEP

49152:7QzHt472D7JtTF+TxMoxc1TU+j+dAzGwlrh:7QzHt9tIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/568-1-0x0000000004120000-0x0000000004269000-memory.dmp	family_vidar_v7
behavioral1/memory/4048-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4048-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4048-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4048-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4048-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4048-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4048-33-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4048-34-0x0000000000400000-0x0000000000646000-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:

kat1623.tmp

pid process

4048 kat1623.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
4048	kat1623.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe

description	pid	process	target process
PID 568 set thread context of 4048	568	9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe	kat1623.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:

kat1623.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat1623.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat1623.tmp

pid process

4048 kat1623.tmp
4048 kat1623.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat1623.tmp

pid	process
4048	kat1623.tmp
4048	kat1623.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe

description	pid	process	target process
PID 568 wrote to memory of 4048	568	9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe	kat1623.tmp
PID 568 wrote to memory of 4048	568	9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe	kat1623.tmp
PID 568 wrote to memory of 4048	568	9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe	kat1623.tmp
PID 568 wrote to memory of 4048	568	9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe	kat1623.tmp
PID 568 wrote to memory of 4048	568	9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe	kat1623.tmp
PID 568 wrote to memory of 4048	568	9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe	kat1623.tmp
PID 568 wrote to memory of 4048	568	9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe	kat1623.tmp
PID 568 wrote to memory of 4048	568	9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe	kat1623.tmp

C:\Users\Admin\AppData\Local\Temp\9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe
"C:\Users\Admin\AppData\Local\Temp\9a19ce83735b38329134985a0840e60d4c49f65981a6cb48fc30d7a68608cd43.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:568
- C:\Users\Admin\AppData\Local\Temp\kat1623.tmp
  C:\Users\Admin\AppData\Local\Temp\kat1623.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4048

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 --mojo-platform-channel-handle=4416 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:8
1⤵
PID:4644

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat1623.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/568-9-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/568-1-0x0000000004120000-0x0000000004269000-memory.dmp

Filesize
1.3MB

Download
memory/568-0-0x00000000023B0000-0x00000000023B1000-memory.dmp

Filesize
4KB

Download
memory/4048-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-18-0x0000000019340000-0x000000001959F000-memory.dmp

Filesize
2.4MB

Download
memory/4048-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads