stealc | 38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888

General

Target

38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe
Size

2.0MB
MD5

ef1fd91b22ff3154e018641e3858ca48
SHA1

6e99e1c3404268ff5af88caf899b4795dfd613a6
SHA256

38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888
SHA512

160c4be7bbe9852181934a9badad8d0752bdc4f42e332364318b5299f3472a4979fb6534316179ae529348e32a3e78d515a3313e1c9d0c5734429a2a768ef903
SSDEEP

49152:7QzHt472DzJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtltIuoITsdZ

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/3272-1-0x00000000041B0000-0x00000000042F9000-memory.dmp	family_vidar_v7
behavioral2/memory/4484-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4484-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4484-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4484-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4484-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4484-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4484-38-0x0000000000400000-0x0000000000646000-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:

kat62C1.tmp

pid process

4484 kat62C1.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
4484	kat62C1.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe

description	pid	process	target process
PID 3272 set thread context of 4484	3272	38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe	kat62C1.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:

kat62C1.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat62C1.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat62C1.tmp

pid process

4484 kat62C1.tmp
4484 kat62C1.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat62C1.tmp

pid	process
4484	kat62C1.tmp
4484	kat62C1.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe

description	pid	process	target process
PID 3272 wrote to memory of 4484	3272	38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe	kat62C1.tmp
PID 3272 wrote to memory of 4484	3272	38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe	kat62C1.tmp
PID 3272 wrote to memory of 4484	3272	38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe	kat62C1.tmp
PID 3272 wrote to memory of 4484	3272	38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe	kat62C1.tmp
PID 3272 wrote to memory of 4484	3272	38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe	kat62C1.tmp
PID 3272 wrote to memory of 4484	3272	38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe	kat62C1.tmp
PID 3272 wrote to memory of 4484	3272	38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe	kat62C1.tmp
PID 3272 wrote to memory of 4484	3272	38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe	kat62C1.tmp

C:\Users\Admin\AppData\Local\Temp\38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe
"C:\Users\Admin\AppData\Local\Temp\38bbcabe8608c99d9f662dce0c6f140f572f932a9ce012e2ed401e14ee977888.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3272

C:\Users\Admin\AppData\Local\Temp\kat62C1.tmp
C:\Users\Admin\AppData\Local\Temp\kat62C1.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4484

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\kat62C1.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3272-0-0x00000000024A0000-0x00000000024A1000-memory.dmp

Filesize
4KB

Download
memory/3272-1-0x00000000041B0000-0x00000000042F9000-memory.dmp

Filesize
1.3MB

Download
memory/3272-9-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/4484-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4484-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4484-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4484-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4484-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4484-22-0x0000000026090000-0x00000000262EF000-memory.dmp

Filesize
2.4MB

Download
memory/4484-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4484-38-0x0000000000400000-0x0000000000646000-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