stealc | ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d

General

Target

ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe
Size

2.4MB
MD5

d1d012998b1398dee03a07c4863551a8
SHA1

065dcbc0b8cf2ccc48f8f874ffff43c737cf414f
SHA256

ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d
SHA512

6aad7334ee333b506710e1f84d58136345791fefa0dccd148aaf1839985b929e58e28b17f41ab8592bdee9341e95bc4f5ffbced09e40fd824ca6c90090dc7f59
SSDEEP

49152:jxIRJF1HL+VdX68kUCJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68dCtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/4956-2-0x0000000004120000-0x0000000004269000-memory.dmp	family_vidar_v7
behavioral2/memory/3356-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3356-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3356-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3356-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3356-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3356-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3356-35-0x0000000000400000-0x0000000000646000-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:

kat5072.tmp

pid process

3356 kat5072.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
3356	kat5072.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe

description	pid	process	target process
PID 4956 set thread context of 3356	4956	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat5072.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:

kat5072.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat5072.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat5072.tmp

pid process

3356 kat5072.tmp
3356 kat5072.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5072.tmp

pid	process
3356	kat5072.tmp
3356	kat5072.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe

description	pid	process	target process
PID 4956 wrote to memory of 3356	4956	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat5072.tmp
PID 4956 wrote to memory of 3356	4956	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat5072.tmp
PID 4956 wrote to memory of 3356	4956	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat5072.tmp
PID 4956 wrote to memory of 3356	4956	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat5072.tmp
PID 4956 wrote to memory of 3356	4956	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat5072.tmp
PID 4956 wrote to memory of 3356	4956	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat5072.tmp
PID 4956 wrote to memory of 3356	4956	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat5072.tmp
PID 4956 wrote to memory of 3356	4956	ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe	kat5072.tmp

C:\Users\Admin\AppData\Local\Temp\ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe
"C:\Users\Admin\AppData\Local\Temp\ef5c02187889780f0d5961b38166c636c8684d373b7c83383224a4bbfd47cb3d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4956
- C:\Users\Admin\AppData\Local\Temp\kat5072.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5072.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3356

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\kat5072.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3356-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3356-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3356-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3356-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3356-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3356-19-0x0000000019360000-0x00000000195BF000-memory.dmp

Filesize
2.4MB

Download
memory/3356-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3356-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4956-0-0x0000000000930000-0x0000000000931000-memory.dmp

Filesize
4KB

Download
memory/4956-2-0x0000000004120000-0x0000000004269000-memory.dmp

Filesize
1.3MB

Download
memory/4956-10-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads