stealc | 1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82

General

Target

1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe
Size

2.1MB
MD5

84bf44fef9cc04cdb5af55681c5823e2
SHA1

533d9c14601b17eb128c95a0c77d83a09c9e3e98
SHA256

1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82
SHA512

2a9f373e920f715a312ba958439a8cd2634823e3c9bb6bc322f8b6a8813cd1fd00617fbc289f2bebcf2d9bf4dc7b22e49fb0c3bc00cba84a97aa246f0aeb6cf2
SSDEEP

49152:N6uDuaS9refygJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9HgtIuoITsdZ

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/8-1-0x0000000004030000-0x0000000004179000-memory.dmp	family_vidar_v7
behavioral2/memory/4036-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4036-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4036-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4036-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4036-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4036-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4036-38-0x0000000000400000-0x0000000000646000-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:

kat4239.tmp

pid process

4036 kat4239.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

Processes:

1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe

description pid process target process

PID 8 set thread context of 4036 8 1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe kat4239.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:

kat4239.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat4239.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat4239.tmp

pid process

4036 kat4239.tmp
4036 kat4239.tmp

pid	process
4036	kat4239.tmp

description	pid	process	target process
PID 8 set thread context of 4036	8	1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe	kat4239.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4239.tmp

pid	process
4036	kat4239.tmp
4036	kat4239.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe

description	pid	process	target process
PID 8 wrote to memory of 4036	8	1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe	kat4239.tmp
PID 8 wrote to memory of 4036	8	1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe	kat4239.tmp
PID 8 wrote to memory of 4036	8	1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe	kat4239.tmp
PID 8 wrote to memory of 4036	8	1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe	kat4239.tmp
PID 8 wrote to memory of 4036	8	1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe	kat4239.tmp
PID 8 wrote to memory of 4036	8	1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe	kat4239.tmp
PID 8 wrote to memory of 4036	8	1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe	kat4239.tmp
PID 8 wrote to memory of 4036	8	1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe	kat4239.tmp

C:\Users\Admin\AppData\Local\Temp\1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe
"C:\Users\Admin\AppData\Local\Temp\1cd747be5f3d8ff13d1eed13aaef92997497912479fcfede5898425bc34cba82.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:8

C:\Users\Admin\AppData\Local\Temp\kat4239.tmp
C:\Users\Admin\AppData\Local\Temp\kat4239.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4036

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat4239.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/8-0-0x0000000002380000-0x0000000002381000-memory.dmp

Filesize
4KB

Download
memory/8-1-0x0000000004030000-0x0000000004179000-memory.dmp

Filesize
1.3MB

Download
memory/8-9-0x0000000000400000-0x000000000061C000-memory.dmp

Filesize
2.1MB

Download
memory/4036-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4036-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4036-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4036-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4036-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4036-22-0x0000000026030000-0x000000002628F000-memory.dmp

Filesize
2.4MB

Download
memory/4036-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4036-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

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