stealc | a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98

General

Target

a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe
Size

1.6MB
MD5

af38e7be820896b52a20a22e81f6c79f
SHA1

76c64234b2cb5c793922104349d011295c150678
SHA256

a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98
SHA512

c5428e6e76f94081545fef94583a0c93a5ae0db25e9c5af41d217f8efc79637dae1a477de91ee1d43db6c92f658e7a1480bcfaa1a3675bdc26698b71e3d0eb23
SSDEEP

24576:spM5863IGfTAVpalBYUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BYUkxVVChjHZQs

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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/1252-1-0x0000000003FC0000-0x00000000040D0000-memory.dmp	family_vidar_v7
behavioral2/memory/4908-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4908-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4908-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4908-15-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4908-16-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4908-33-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/4908-34-0x0000000000400000-0x0000000000648000-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
4908	kat787C.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 1252 set thread context of 4908	1252	a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe	78

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	kat787C.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4908	kat787C.tmp
4908	kat787C.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1252 wrote to memory of 4908	1252	a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe	78
PID 1252 wrote to memory of 4908	1252	a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe	78
PID 1252 wrote to memory of 4908	1252	a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe	78
PID 1252 wrote to memory of 4908	1252	a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe	78
PID 1252 wrote to memory of 4908	1252	a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe	78
PID 1252 wrote to memory of 4908	1252	a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe	78
PID 1252 wrote to memory of 4908	1252	a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe	78
PID 1252 wrote to memory of 4908	1252	a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe	78

C:\Users\Admin\AppData\Local\Temp\a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe
"C:\Users\Admin\AppData\Local\Temp\a35588f8c042184df0fdc15877ed5d46ea6cd151f12a42180b302d22d64d7a98.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1252
- C:\Users\Admin\AppData\Local\Temp\kat787C.tmp
  C:\Users\Admin\AppData\Local\Temp\kat787C.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4908

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\kat787C.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1252-0-0x00000000023D0000-0x00000000023D1000-memory.dmp

Filesize
4KB

Download
memory/1252-1-0x0000000003FC0000-0x00000000040D0000-memory.dmp

Filesize
1.1MB

Download
memory/1252-9-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download
memory/4908-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4908-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4908-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4908-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4908-16-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4908-18-0x0000000019360000-0x00000000195BF000-memory.dmp

Filesize
2.4MB

Download
memory/4908-33-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4908-34-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads