stealc | 2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee

General

Target

2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe
Size

1.8MB
MD5

aea0e90c3cc7a1096274e6f5d467afb2
SHA1

3c5ef2f989740f48b61edfda747a7b079e27e0c9
SHA256

2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee
SHA512

cac50e55de56b9e0d5d9dab18cfdf9fd701e4d263340e7fac08b9caf3883c77d0e8141a7bbef90f2440a41179000b2863b59b92cd42bdd9183a066e1c20c5838
SSDEEP

24576:FBfuZfeq6sVO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFHJtTF+TxMoxc1TU+j+dAzGwlrh

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/2172-1-0x00000000040D0000-0x0000000004219000-memory.dmp	family_vidar_v7
behavioral1/memory/2668-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2668-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2668-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2668-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2668-18-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2668-35-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2668-51-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2668-52-0x0000000000400000-0x0000000000646000-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:

kat6A91.tmp

pid process

2668 kat6A91.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
2668	kat6A91.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe

description	pid	process	target process
PID 2172 set thread context of 2668	2172	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat6A91.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:

kat6A91.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat6A91.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat6A91.tmp

pid process

2668 kat6A91.tmp
2668 kat6A91.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat6A91.tmp

pid	process
2668	kat6A91.tmp
2668	kat6A91.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe

description	pid	process	target process
PID 2172 wrote to memory of 2668	2172	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat6A91.tmp
PID 2172 wrote to memory of 2668	2172	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat6A91.tmp
PID 2172 wrote to memory of 2668	2172	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat6A91.tmp
PID 2172 wrote to memory of 2668	2172	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat6A91.tmp
PID 2172 wrote to memory of 2668	2172	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat6A91.tmp
PID 2172 wrote to memory of 2668	2172	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat6A91.tmp
PID 2172 wrote to memory of 2668	2172	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat6A91.tmp
PID 2172 wrote to memory of 2668	2172	2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe	kat6A91.tmp

C:\Users\Admin\AppData\Local\Temp\2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe
"C:\Users\Admin\AppData\Local\Temp\2a4534b85a38f45c3a95b04c4d88983fc99c15bb98dde5536b9733789413fcee.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2172

C:\Users\Admin\AppData\Local\Temp\kat6A91.tmp
C:\Users\Admin\AppData\Local\Temp\kat6A91.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:2668

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\kat6A91.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2172-9-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download
memory/2172-1-0x00000000040D0000-0x0000000004219000-memory.dmp

Filesize
1.3MB

Download
memory/2172-0-0x0000000000890000-0x0000000000891000-memory.dmp

Filesize
4KB

Download
memory/2668-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2668-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2668-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2668-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2668-18-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2668-20-0x000000001DC40000-0x000000001DE9F000-memory.dmp

Filesize
2.4MB

Download
memory/2668-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2668-51-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2668-52-0x0000000000400000-0x0000000000646000-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