stealc | ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d

General

Target

ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe
Size

2.4MB
MD5

d1d012998b1398dee03a07c4863551a8
SHA1

065dcbc0b8cf2ccc48f8f874ffff43c737cf414f
SHA256

ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d
SHA512

6aad7334ee333b506710e1f84d58136345791fefa0dccd148aaf1839985b929e58e28b17f41ab8592bdee9341e95bc4f5ffbced09e40fd824ca6c90090dc7f59
SSDEEP

49152:jxIRJF1HL+VdX68kUCJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dCtIuoITsdZ

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/4000-2-0x00000000042B0000-0x00000000043F9000-memory.dmp	family_vidar_v7
behavioral1/memory/2480-5-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2480-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2480-11-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2480-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2480-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2480-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2480-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2480-38-0x0000000000400000-0x0000000000646000-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:

kat2AF3.tmp

pid process

2480 kat2AF3.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
2480	kat2AF3.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe

description	pid	process	target process
PID 4000 set thread context of 2480	4000	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat2AF3.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:

kat2AF3.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat2AF3.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat2AF3.tmp

pid process

2480 kat2AF3.tmp
2480 kat2AF3.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat2AF3.tmp

pid	process
2480	kat2AF3.tmp
2480	kat2AF3.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe

description	pid	process	target process
PID 4000 wrote to memory of 2480	4000	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat2AF3.tmp
PID 4000 wrote to memory of 2480	4000	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat2AF3.tmp
PID 4000 wrote to memory of 2480	4000	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat2AF3.tmp
PID 4000 wrote to memory of 2480	4000	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat2AF3.tmp
PID 4000 wrote to memory of 2480	4000	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat2AF3.tmp
PID 4000 wrote to memory of 2480	4000	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat2AF3.tmp
PID 4000 wrote to memory of 2480	4000	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat2AF3.tmp
PID 4000 wrote to memory of 2480	4000	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat2AF3.tmp

C:\Users\Admin\AppData\Local\Temp\ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe
"C:\Users\Admin\AppData\Local\Temp\ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Users\Admin\AppData\Local\Temp\kat2AF3.tmp
  C:\Users\Admin\AppData\Local\Temp\kat2AF3.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:2480

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=3700 --field-trial-handle=2272,i,4858140932023865871,5726683989663339295,262144 --variations-seed-version /prefetch:8
1⤵
PID:2460

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\kat2AF3.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2480-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2480-5-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2480-11-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2480-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2480-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2480-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2480-22-0x000000001B820000-0x000000001BA7F000-memory.dmp

Filesize
2.4MB

Download
memory/2480-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2480-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4000-2-0x00000000042B0000-0x00000000043F9000-memory.dmp

Filesize
1.3MB

Download
memory/4000-1-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download
memory/4000-9-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download
memory/4000-0-0x0000000002410000-0x0000000002411000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads