stealc | 88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf

General

Target

88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe
Size

2.4MB
MD5

260da841708efb8904a7abf5f59bd301
SHA1

70c0e33d9ee31d3ee41f558e8eef5c9c22174dd6
SHA256

88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf
SHA512

cfede6ef85bdf1856201e39a241d2ec7de30a2b4a67df168bb2c9c76b6fc4c2f57dca383b9587144f5aafe850e26151a7a63c2a3c2c8fce16c5b5dec35fb66cb
SSDEEP

49152:jxIRJF1HL+VdX68kUqJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dqtIuoITsdZ

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

resource	yara_rule
behavioral2/memory/4712-2-0x0000000004070000-0x00000000041B9000-memory.dmp	family_vidar_v7
behavioral2/memory/4496-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4496-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4496-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4496-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4496-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4496-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4496-33-0x0000000000400000-0x0000000000646000-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

pid	Process
4496	kat4798.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 4712 set thread context of 4496	4712	88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe	84

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4798.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4496	kat4798.tmp
4496	kat4798.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4712 wrote to memory of 4496	4712	88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe	84
PID 4712 wrote to memory of 4496	4712	88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe	84
PID 4712 wrote to memory of 4496	4712	88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe	84
PID 4712 wrote to memory of 4496	4712	88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe	84
PID 4712 wrote to memory of 4496	4712	88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe	84
PID 4712 wrote to memory of 4496	4712	88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe	84
PID 4712 wrote to memory of 4496	4712	88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe	84
PID 4712 wrote to memory of 4496	4712	88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe	84

C:\Users\Admin\AppData\Local\Temp\88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe
"C:\Users\Admin\AppData\Local\Temp\88c44aaed93b06d47fa8fe986fa0cd5e16f55e4858e17c101ae57bbacc8beeaf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4712
- C:\Users\Admin\AppData\Local\Temp\kat4798.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4798.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4496

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\kat4798.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4496-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4496-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4496-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4496-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4496-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4496-17-0x000000001DC30000-0x000000001DE8F000-memory.dmp

Filesize
2.4MB

Download
memory/4496-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4496-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4712-0-0x00000000024D0000-0x00000000024D1000-memory.dmp

Filesize
4KB

Download
memory/4712-2-0x0000000004070000-0x00000000041B9000-memory.dmp

Filesize
1.3MB

Download
memory/4712-10-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads