stealc | dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427

General

Target

dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe
Size

2.0MB
MD5

6fed0bcd0900f4c90d68f62fa416ad54
SHA1

9073d511e9632b1d24329f257d7c20e8a5ce169c
SHA256

dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427
SHA512

c0beb9cf52408b88a64bba3e51e4dfd58eea3c32c04e76b1df98fcfaca7fcf89fafa2c4884de71411c3e96f6005a4536b6efcb6348c84a4edbc0e57e319fadd8
SSDEEP

49152:OePpQEhJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEhtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

Detect Vidar Stealer 14 IoCs

stealer

resource	yara_rule
behavioral1/memory/2084-1-0x00000000040D0000-0x0000000004219000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-33-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-49-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-56-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-61-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-62-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-63-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/2092-66-0x0000000000400000-0x0000000000646000-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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	kat3894.tmp

Executes dropped EXE 1 IoCs

pid	Process
2092	kat3894.tmp

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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 2084 set thread context of 2092	2084	dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe	84

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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	kat3894.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2908	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2092	kat3894.tmp
2092	kat3894.tmp
2092	kat3894.tmp
2092	kat3894.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2092	2084	dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe	84
PID 2084 wrote to memory of 2092	2084	dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe	84
PID 2084 wrote to memory of 2092	2084	dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe	84
PID 2084 wrote to memory of 2092	2084	dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe	84
PID 2084 wrote to memory of 2092	2084	dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe	84
PID 2084 wrote to memory of 2092	2084	dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe	84
PID 2084 wrote to memory of 2092	2084	dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe	84
PID 2084 wrote to memory of 2092	2084	dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe	84
PID 2092 wrote to memory of 1136	2092	kat3894.tmp	93
PID 2092 wrote to memory of 1136	2092	kat3894.tmp	93
PID 2092 wrote to memory of 1136	2092	kat3894.tmp	93
PID 1136 wrote to memory of 2908	1136	cmd.exe	95
PID 1136 wrote to memory of 2908	1136	cmd.exe	95
PID 1136 wrote to memory of 2908	1136	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe
"C:\Users\Admin\AppData\Local\Temp\dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Users\Admin\AppData\Local\Temp\kat3894.tmp
  C:\Users\Admin\AppData\Local\Temp\kat3894.tmp
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2092
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat3894.tmp" & rd /s /q "C:\ProgramData\DGDHJEGIEBFH" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1136
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:2908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

4

T1552

Credentials In Files

4

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat3894.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2084-1-0x00000000040D0000-0x0000000004219000-memory.dmp

Filesize
1.3MB

Download
memory/2084-0-0x00000000007F0000-0x00000000007F1000-memory.dmp

Filesize
4KB

Download
memory/2084-10-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download
memory/2092-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-17-0x000000001B710000-0x000000001B96F000-memory.dmp

Filesize
2.4MB

Download
memory/2092-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-49-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-56-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-61-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-62-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-63-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/2092-66-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads