stealc | b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212

General

Target

b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe
Size

1.8MB
MD5

9dd1ebec74f8fa3cca2167f2cedf4afc
SHA1

412b3aee147e78eda48f9fbf089d3341eef3a5e1
SHA256

b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212
SHA512

eb30e4a013337e3d40195d578de9bec8718ad02a2231a7f1401d06fc9ce77b8f615433ecdb6b3712ebd3b4773e4282d6948e3f22dd4c053e24be64fb56e8e3d5
SSDEEP

24576:FBfuZfeq6s5O6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qFjJtTF+TxMoxc1TU+j+dAzGwlrh

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/2628-1-0x00000000041D0000-0x0000000004319000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3132-38-0x0000000000400000-0x0000000000646000-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:

kat901A.tmp

pid process

3132 kat901A.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
3132	kat901A.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe

description	pid	process	target process
PID 2628 set thread context of 3132	2628	b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe	kat901A.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:

kat901A.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat901A.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat901A.tmp

pid process

3132 kat901A.tmp
3132 kat901A.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat901A.tmp

pid	process
3132	kat901A.tmp
3132	kat901A.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe

description	pid	process	target process
PID 2628 wrote to memory of 3132	2628	b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe	kat901A.tmp
PID 2628 wrote to memory of 3132	2628	b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe	kat901A.tmp
PID 2628 wrote to memory of 3132	2628	b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe	kat901A.tmp
PID 2628 wrote to memory of 3132	2628	b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe	kat901A.tmp
PID 2628 wrote to memory of 3132	2628	b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe	kat901A.tmp
PID 2628 wrote to memory of 3132	2628	b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe	kat901A.tmp
PID 2628 wrote to memory of 3132	2628	b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe	kat901A.tmp
PID 2628 wrote to memory of 3132	2628	b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe	kat901A.tmp

C:\Users\Admin\AppData\Local\Temp\b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe
"C:\Users\Admin\AppData\Local\Temp\b1f67e16ef67b958f74b96d940ea6216dd800dfbf4afbff79e4c8ce313473212.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Users\Admin\AppData\Local\Temp\kat901A.tmp
  C:\Users\Admin\AppData\Local\Temp\kat901A.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3132

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat901A.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2628-0-0x0000000002580000-0x0000000002581000-memory.dmp

Filesize
4KB

Download
memory/2628-1-0x00000000041D0000-0x0000000004319000-memory.dmp

Filesize
1.3MB

Download
memory/2628-10-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download
memory/3132-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-22-0x000000001B830000-0x000000001BA8F000-memory.dmp

Filesize
2.4MB

Download
memory/3132-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3132-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads