stealc | 8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360

General

Target

8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe
Size

1.8MB
MD5

a555d4eeba7d2d06dfc73701ac4877bc
SHA1

366a4ed9bef1c6731ee55d8f6554513516dc684a
SHA256

8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360
SHA512

05efe16d44e373981f22abbae2222dff6385c9febeafb327b88d55a5f25f1d1e3b5e25be2b1fb24c52404797d6087c03f9a55b8f15e830090df241f3456eb99c
SSDEEP

24576:FBfuZfeq6slO6hTdtTF+TxMoxQH1Tj4wtjYZH1DmoYYzi3WH45yv+OueSJhm9e:F7qF3JtTF+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

resource	yara_rule
behavioral1/memory/4828-1-0x00000000040B0000-0x00000000041F9000-memory.dmp	family_vidar_v7
behavioral1/memory/4520-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4520-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4520-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4520-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4520-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4520-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4520-33-0x0000000000400000-0x0000000000646000-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

pid	Process
4520	kat4537.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

description	pid	Process	procid_target
PID 4828 set thread context of 4520	4828	8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe	84

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat4537.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4520	kat4537.tmp
4520	kat4537.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4828 wrote to memory of 4520	4828	8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe	84
PID 4828 wrote to memory of 4520	4828	8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe	84
PID 4828 wrote to memory of 4520	4828	8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe	84
PID 4828 wrote to memory of 4520	4828	8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe	84
PID 4828 wrote to memory of 4520	4828	8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe	84
PID 4828 wrote to memory of 4520	4828	8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe	84
PID 4828 wrote to memory of 4520	4828	8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe	84
PID 4828 wrote to memory of 4520	4828	8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe	84

C:\Users\Admin\AppData\Local\Temp\8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe
"C:\Users\Admin\AppData\Local\Temp\8dbb5bf34ca4feb59909a475173c36c89514f92905f7e156515a76257f46c360.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4828
- C:\Users\Admin\AppData\Local\Temp\kat4537.tmp
  C:\Users\Admin\AppData\Local\Temp\kat4537.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4520

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\kat4537.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4520-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4520-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4520-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4520-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4520-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4520-17-0x000000001B780000-0x000000001B9DF000-memory.dmp

Filesize
2.4MB

Download
memory/4520-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4520-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4828-0-0x0000000000790000-0x0000000000791000-memory.dmp

Filesize
4KB

Download
memory/4828-1-0x00000000040B0000-0x00000000041F9000-memory.dmp

Filesize
1.3MB

Download
memory/4828-10-0x0000000000400000-0x00000000005D1000-memory.dmp

Filesize
1.8MB

Download

Analysis

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