stealc | 3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd

General

Target

3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe
Size

2.0MB
MD5

c4da3e0445e672d9a5a4ce37d6b44bb7
SHA1

6a4301a630e7d93d27248a82489a3ab8a54afb70
SHA256

3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd
SHA512

35e1e9b93bb574e7dee864fca74fea5144653b06b20de24d70abad5af54e384e929e08a3c02c6f8b6a2a836a3df1abb96ced195d4dee89d86be99f70643e6d44
SSDEEP

49152:7QzHt472DcJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtatIuoITsdZ

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/4496-1-0x0000000004160000-0x00000000042A9000-memory.dmp	family_vidar_v7
behavioral1/memory/4596-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4596-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4596-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4596-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4596-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4596-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4596-38-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4596-39-0x0000000000400000-0x0000000000646000-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:

kat60CD.tmp

pid process

4596 kat60CD.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
4596	kat60CD.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe

description	pid	process	target process
PID 4496 set thread context of 4596	4496	3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe	kat60CD.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:

kat60CD.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat60CD.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat60CD.tmp

pid process

4596 kat60CD.tmp
4596 kat60CD.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat60CD.tmp

pid	process
4596	kat60CD.tmp
4596	kat60CD.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe

description	pid	process	target process
PID 4496 wrote to memory of 4596	4496	3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe	kat60CD.tmp
PID 4496 wrote to memory of 4596	4496	3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe	kat60CD.tmp
PID 4496 wrote to memory of 4596	4496	3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe	kat60CD.tmp
PID 4496 wrote to memory of 4596	4496	3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe	kat60CD.tmp
PID 4496 wrote to memory of 4596	4496	3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe	kat60CD.tmp
PID 4496 wrote to memory of 4596	4496	3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe	kat60CD.tmp
PID 4496 wrote to memory of 4596	4496	3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe	kat60CD.tmp
PID 4496 wrote to memory of 4596	4496	3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe	kat60CD.tmp

C:\Users\Admin\AppData\Local\Temp\3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe
"C:\Users\Admin\AppData\Local\Temp\3a66e87715918ab44acbd17d50ce96e3f0818c2e9fb87c133b25c8515fd035fd.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4496
- C:\Users\Admin\AppData\Local\Temp\kat60CD.tmp
  C:\Users\Admin\AppData\Local\Temp\kat60CD.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4596

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\kat60CD.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4496-9-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/4496-1-0x0000000004160000-0x00000000042A9000-memory.dmp

Filesize
1.3MB

Download
memory/4496-0-0x00000000024A0000-0x00000000024A1000-memory.dmp

Filesize
4KB

Download
memory/4596-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4596-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4596-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4596-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4596-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4596-22-0x000000001B790000-0x000000001B9EF000-memory.dmp

Filesize
2.4MB

Download
memory/4596-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4596-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4596-39-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads