stealc | 94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49

General

Target

94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe
Size

423KB
MD5

b470106d2e9860ea4697e58d9bb59005
SHA1

e0ac0ced62c25bcbac1e87f3323691450c834067
SHA256

94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49
SHA512

e69501712fa457b5674f3dc39cb29df036c4b53844b6b3a26ac83ff7b8754a67873fb2ef385f95a1949182a83306d976e729c0ecdb9e9ae2aa36e652f1175eaa
SSDEEP

6144:qqi+RrKHLIo4V1p+a3Vy/JDDn4LjGQpk3KXHX5dkXjKhyBc2S6LSH:sHLIoCCDujGUZXHXYuhyBc2S6L

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 11 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/4772-1-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-6-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-11-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-28-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-29-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-45-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-46-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-57-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4772-58-0x0000000000400000-0x0000000000646000-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

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation RegAsm.exe
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

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe

description	pid	process	target process
PID 1100 set thread context of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe

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

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString RegAsm.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2300 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

RegAsm.exe

pid process

4772 RegAsm.exe
4772 RegAsm.exe
4772 RegAsm.exe
4772 RegAsm.exe

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

pid	process
2300	timeout.exe

pid	process
4772	RegAsm.exe
4772	RegAsm.exe
4772	RegAsm.exe
4772	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exeRegAsm.execmd.exe

description	pid	process	target process
PID 1100 wrote to memory of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe
PID 1100 wrote to memory of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe
PID 1100 wrote to memory of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe
PID 1100 wrote to memory of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe
PID 1100 wrote to memory of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe
PID 1100 wrote to memory of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe
PID 1100 wrote to memory of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe
PID 1100 wrote to memory of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe
PID 1100 wrote to memory of 4772	1100	94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe	RegAsm.exe
PID 4772 wrote to memory of 680	4772	RegAsm.exe	cmd.exe
PID 4772 wrote to memory of 680	4772	RegAsm.exe	cmd.exe
PID 4772 wrote to memory of 680	4772	RegAsm.exe	cmd.exe
PID 680 wrote to memory of 2300	680	cmd.exe	timeout.exe
PID 680 wrote to memory of 2300	680	cmd.exe	timeout.exe
PID 680 wrote to memory of 2300	680	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe
"C:\Users\Admin\AppData\Local\Temp\94a8c46c1725fb656990f0b536166eda68c376929f0e221e60db0af6f2f4ac49.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1100
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks computer location settings
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4772
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\DGCFHIDAKECF" & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:680
  - - C:\Windows\SysWOW64\timeout.exe
      timeout /t 10
      4⤵
      Delays execution with timeout.exe
      PID:2300

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

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1100-0-0x0000000000D40000-0x0000000000D41000-memory.dmp

Filesize
4KB

Download
memory/1100-2-0x0000000000D40000-0x0000000000D41000-memory.dmp

Filesize
4KB

Download
memory/4772-1-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-6-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-11-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-13-0x000000001B640000-0x000000001B89F000-memory.dmp

Filesize
2.4MB

Download
memory/4772-28-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-29-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-45-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-46-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-57-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4772-58-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads