stealc | d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee

General

Target

d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe
Size

2.0MB
MD5

4d686811c4dd1ab8c1620f7cb8572d3b
SHA1

2ee200ca78f0776c37d6d497bf9d7578d04e663c
SHA256

d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee
SHA512

dc12d71197cb69ede5ddae7312168c8752b9d7c5f581488c4049b328a9fe0c2b71f7c2cfd76277574fb6e4e6e2bd4dcdf2c87002fea6305f20e4097030d8a6dc
SSDEEP

49152:s4K3x1vU2JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex182tIuoITsdZ

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
behavioral2/memory/3096-2-0x0000000004090000-0x00000000041D9000-memory.dmp	family_vidar_v7
behavioral2/memory/4048-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4048-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4048-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4048-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4048-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4048-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4048-38-0x0000000000400000-0x0000000000646000-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:

kat6BBA.tmp

pid process

4048 kat6BBA.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	kat6BBA.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe

description	pid	process	target process
PID 3096 set thread context of 4048	3096	d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe	kat6BBA.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:

kat6BBA.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat6BBA.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat6BBA.tmp

pid process

4048 kat6BBA.tmp
4048 kat6BBA.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat6BBA.tmp

pid	process
4048	kat6BBA.tmp
4048	kat6BBA.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe

description	pid	process	target process
PID 3096 wrote to memory of 4048	3096	d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe	kat6BBA.tmp
PID 3096 wrote to memory of 4048	3096	d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe	kat6BBA.tmp
PID 3096 wrote to memory of 4048	3096	d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe	kat6BBA.tmp
PID 3096 wrote to memory of 4048	3096	d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe	kat6BBA.tmp
PID 3096 wrote to memory of 4048	3096	d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe	kat6BBA.tmp
PID 3096 wrote to memory of 4048	3096	d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe	kat6BBA.tmp
PID 3096 wrote to memory of 4048	3096	d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe	kat6BBA.tmp
PID 3096 wrote to memory of 4048	3096	d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe	kat6BBA.tmp

C:\Users\Admin\AppData\Local\Temp\d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe
"C:\Users\Admin\AppData\Local\Temp\d28b3ea1f8fd6885497e550e37a019d0a364a6d1bc26222889a62e15b3389dee.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3096

C:\Users\Admin\AppData\Local\Temp\kat6BBA.tmp
C:\Users\Admin\AppData\Local\Temp\kat6BBA.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4048

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat6BBA.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3096-0-0x0000000000800000-0x0000000000801000-memory.dmp

Filesize
4KB

Download
memory/3096-2-0x0000000004090000-0x00000000041D9000-memory.dmp

Filesize
1.3MB

Download
memory/3096-10-0x0000000000400000-0x000000000060C000-memory.dmp

Filesize
2.0MB

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

Filesize
2.3MB

Download
memory/4048-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

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

Filesize
2.3MB

Download
memory/4048-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-22-0x0000000026070000-0x00000000262CF000-memory.dmp

Filesize
2.4MB

Download
memory/4048-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4048-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads