stealc | 6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5

General

Target

6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe
Size

2.0MB
MD5

3d2827a97619c3aad1e1c03444df8c41
SHA1

4e29ca126bbd255d7ece151d937edbe12df43ee9
SHA256

6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5
SHA512

eda7b7f2a27c7391f5db2ec7fe3e256e95444859f6fb9f2421fd233b127eeb2ce18b64612bca9150fa957b76feebf0ae388949cc601d274292648e44ee0390c7
SSDEEP

49152:7QzHt472D3JtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtZtIuoITsdZ

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/5036-1-0x0000000004050000-0x0000000004199000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3596-39-0x0000000000400000-0x0000000000646000-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:

kat4074.tmp

pid process

3596 kat4074.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
3596	kat4074.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe

description	pid	process	target process
PID 5036 set thread context of 3596	5036	6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe	kat4074.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:

kat4074.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4074.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4074.tmp

pid process

3596 kat4074.tmp
3596 kat4074.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4074.tmp

pid	process
3596	kat4074.tmp
3596	kat4074.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe

description	pid	process	target process
PID 5036 wrote to memory of 3596	5036	6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe	kat4074.tmp
PID 5036 wrote to memory of 3596	5036	6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe	kat4074.tmp
PID 5036 wrote to memory of 3596	5036	6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe	kat4074.tmp
PID 5036 wrote to memory of 3596	5036	6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe	kat4074.tmp
PID 5036 wrote to memory of 3596	5036	6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe	kat4074.tmp
PID 5036 wrote to memory of 3596	5036	6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe	kat4074.tmp
PID 5036 wrote to memory of 3596	5036	6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe	kat4074.tmp
PID 5036 wrote to memory of 3596	5036	6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe	kat4074.tmp

C:\Users\Admin\AppData\Local\Temp\6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe
"C:\Users\Admin\AppData\Local\Temp\6cb9b55719f469b27ea2e00ec9e033a095fe2082c672184b79c3a94fbab877b5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5036
- C:\Users\Admin\AppData\Local\Temp\kat4074.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4074.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3596

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\kat4074.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3596-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-22-0x0000000025F70000-0x00000000261CF000-memory.dmp

Filesize
2.4MB

Download
memory/3596-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3596-39-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/5036-0-0x00000000007C0000-0x00000000007C1000-memory.dmp

Filesize
4KB

Download
memory/5036-1-0x0000000004050000-0x0000000004199000-memory.dmp

Filesize
1.3MB

Download
memory/5036-10-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads