stealc | a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479

General

Target

a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe
Size

2.4MB
MD5

7b8d6baf4ed9b124e6547e1c9fbc43fd
SHA1

2b1166140f556376bffef520c73f5015ce924da3
SHA256

a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479
SHA512

91953d23cb5041ab2edcf51e86dfcd6e0f9591e9e226711eafd05bde446bc6c6124c0e04b422d496921f1d5e7d5da3d825a4e265a4ae8c44622014ca2ce07c53
SSDEEP

49152:jxIRJF1HL+VdX68kU2JtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68d2tIuoITsdZ

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/2140-1-0x00000000040E0000-0x0000000004229000-memory.dmp	family_vidar_v7
behavioral2/memory/4144-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4144-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4144-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4144-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4144-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4144-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4144-35-0x0000000000400000-0x0000000000646000-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:

kat50A0.tmp

pid process

4144 kat50A0.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
4144	kat50A0.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe

description	pid	process	target process
PID 2140 set thread context of 4144	2140	a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe	kat50A0.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:

kat50A0.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat50A0.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat50A0.tmp

pid process

4144 kat50A0.tmp
4144 kat50A0.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat50A0.tmp

pid	process
4144	kat50A0.tmp
4144	kat50A0.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe

description	pid	process	target process
PID 2140 wrote to memory of 4144	2140	a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe	kat50A0.tmp
PID 2140 wrote to memory of 4144	2140	a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe	kat50A0.tmp
PID 2140 wrote to memory of 4144	2140	a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe	kat50A0.tmp
PID 2140 wrote to memory of 4144	2140	a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe	kat50A0.tmp
PID 2140 wrote to memory of 4144	2140	a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe	kat50A0.tmp
PID 2140 wrote to memory of 4144	2140	a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe	kat50A0.tmp
PID 2140 wrote to memory of 4144	2140	a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe	kat50A0.tmp
PID 2140 wrote to memory of 4144	2140	a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe	kat50A0.tmp

C:\Users\Admin\AppData\Local\Temp\a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe
"C:\Users\Admin\AppData\Local\Temp\a3c161600ab64462dbabbab822f395fe3f82048ae3cb0502e49a98eedfc6f479.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2140

C:\Users\Admin\AppData\Local\Temp\kat50A0.tmp
C:\Users\Admin\AppData\Local\Temp\kat50A0.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4144

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\kat50A0.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2140-0-0x00000000023D0000-0x00000000023D1000-memory.dmp

Filesize
4KB

Download
memory/2140-1-0x00000000040E0000-0x0000000004229000-memory.dmp

Filesize
1.3MB

Download
memory/2140-9-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download
memory/4144-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4144-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4144-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4144-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4144-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4144-19-0x0000000019430000-0x000000001968F000-memory.dmp

Filesize
2.4MB

Download
memory/4144-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4144-35-0x0000000000400000-0x0000000000646000-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