stealc | 933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb

General

Target

933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe
Size

1.7MB
MD5

a14953efe2b9f3c47bf68e39a0edfa3d
SHA1

2d6ca40be0856ea91c7f3f92e6b03ae3fb3e944c
SHA256

933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb
SHA512

eaea27cae2f2350dc77030a1294cd0f82dc913dbfc9f2e4dcaf043865b9ead63de0ea8c96cbfeb73fc91cbb2131c3c8a7aa1dc0bef9ec9c8dcb2c11c952ad661
SSDEEP

24576:UBqWKKYMPEV1YzMPkYHXANYksiZArxliP4OTomFu5Xxth9:UyM8V18W5aYRi2lpYu5XxZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

vidar

C2

https://t.me/bu77un

https://steamcommunity.com/profiles/76561199730044335

Attributes

user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.1) Gecko/20100101 Firefox/128.1

Signatures

Detect Vidar Stealer 9 IoCs

stealer

resource	yara_rule
behavioral2/memory/2244-1-0x0000000004120000-0x0000000004263000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-12-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-13-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-14-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral2/memory/1056-15-0x0000000000400000-0x0000000000648000-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

Executes dropped EXE 1 IoCs

pid	Process
1056	kat880C.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
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 2244 set thread context of 1056	2244	933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe	78

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 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	kat880C.tmp
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat880C.tmp

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4256	timeout.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1056	kat880C.tmp
1056	kat880C.tmp
1056	kat880C.tmp
1056	kat880C.tmp
1056	kat880C.tmp
1056	kat880C.tmp

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 1056	2244	933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe	78
PID 2244 wrote to memory of 1056	2244	933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe	78
PID 2244 wrote to memory of 1056	2244	933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe	78
PID 2244 wrote to memory of 1056	2244	933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe	78
PID 2244 wrote to memory of 1056	2244	933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe	78
PID 2244 wrote to memory of 1056	2244	933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe	78
PID 2244 wrote to memory of 1056	2244	933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe	78
PID 2244 wrote to memory of 1056	2244	933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe	78
PID 1056 wrote to memory of 4600	1056	kat880C.tmp	80
PID 1056 wrote to memory of 4600	1056	kat880C.tmp	80
PID 1056 wrote to memory of 4600	1056	kat880C.tmp	80
PID 4600 wrote to memory of 4256	4600	cmd.exe	82
PID 4600 wrote to memory of 4256	4600	cmd.exe	82
PID 4600 wrote to memory of 4256	4600	cmd.exe	82

C:\Users\Admin\AppData\Local\Temp\933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe
"C:\Users\Admin\AppData\Local\Temp\933712c06e7f37c66f027608391a24ff0873f215f9e778b42f673957f6497acb.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2244
- C:\Users\Admin\AppData\Local\Temp\kat880C.tmp
  C:\Users\Admin\AppData\Local\Temp\kat880C.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1056
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat880C.tmp" & rd /s /q "C:\ProgramData\BFIDGHDBAFIJ" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4600
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:4256

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

2

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\kat880C.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1056-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1056-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1056-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1056-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1056-12-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1056-13-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1056-14-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/1056-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/2244-0-0x0000000002320000-0x0000000002321000-memory.dmp

Filesize
4KB

Download
memory/2244-1-0x0000000004120000-0x0000000004263000-memory.dmp

Filesize
1.3MB

Download
memory/2244-10-0x0000000000400000-0x00000000005C5000-memory.dmp

Filesize
1.8MB

Download

Analysis

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