stealc | 688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a

General

Target

688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe
Size

2.0MB
MD5

d360ab70d33011e92130c42526f09a87
SHA1

3336a3fb67eaecc85734cfed1ad18fae79f6409d
SHA256

688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a
SHA512

9632ccacc5c85983fe57f72c766fcc39decf99601c6e8c51b05c78ba76bd5a8f57a6e9a3bab8272138edef7b0f094317c398b79cb20cac1be377bc54863b2c77
SSDEEP

49152:7QzHt472DAJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHt6tIuoITsdZ

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/2532-1-0x00000000040C0000-0x0000000004209000-memory.dmp	family_vidar_v7
behavioral2/memory/4164-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4164-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4164-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4164-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4164-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4164-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4164-35-0x0000000000400000-0x0000000000646000-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:

kat5023.tmp

pid process

4164 kat5023.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
4164	kat5023.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe

description	pid	process	target process
PID 2532 set thread context of 4164	2532	688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe	kat5023.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:

kat5023.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat5023.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat5023.tmp

pid process

4164 kat5023.tmp
4164 kat5023.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5023.tmp

pid	process
4164	kat5023.tmp
4164	kat5023.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe

description	pid	process	target process
PID 2532 wrote to memory of 4164	2532	688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe	kat5023.tmp
PID 2532 wrote to memory of 4164	2532	688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe	kat5023.tmp
PID 2532 wrote to memory of 4164	2532	688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe	kat5023.tmp
PID 2532 wrote to memory of 4164	2532	688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe	kat5023.tmp
PID 2532 wrote to memory of 4164	2532	688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe	kat5023.tmp
PID 2532 wrote to memory of 4164	2532	688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe	kat5023.tmp
PID 2532 wrote to memory of 4164	2532	688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe	kat5023.tmp
PID 2532 wrote to memory of 4164	2532	688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe	kat5023.tmp

C:\Users\Admin\AppData\Local\Temp\688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe
"C:\Users\Admin\AppData\Local\Temp\688be43c5df4f384feb809364feaf42a64988128bf8e873c3f7a3e31ab23d85a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2532

C:\Users\Admin\AppData\Local\Temp\kat5023.tmp
C:\Users\Admin\AppData\Local\Temp\kat5023.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4164

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\kat5023.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2532-0-0x0000000002360000-0x0000000002361000-memory.dmp

Filesize
4KB

Download
memory/2532-1-0x00000000040C0000-0x0000000004209000-memory.dmp

Filesize
1.3MB

Download
memory/2532-10-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/4164-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-20-0x000000001B860000-0x000000001BABF000-memory.dmp

Filesize
2.4MB

Download
memory/4164-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-35-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads