stealc | bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480

General

Target

bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe
Size

2.0MB
MD5

28e1811f19daa3cd7a3e7cadac19725a
SHA1

eee93e62661b3f86d5e51e84213a1249033e4afa
SHA256

bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480
SHA512

16efded87483075a3de6dc1bd1949a48a683f0ed5d8859955a9182dfc23cd0d23411674e9287283a7bfe27b0f9b4fa610eaeffdd0d95e2876aac762ef3c616ee
SSDEEP

49152:s4K3x1vUSJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18StIuoITsdZ

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 13 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/2488-2-0x0000000004030000-0x0000000004179000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-38-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-54-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-55-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-66-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-67-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3088-68-0x0000000000400000-0x0000000000646000-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:

kat3F1C.tmp

pid process

3088 kat3F1C.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

pid	process
3088	kat3F1C.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe

description	pid	process	target process
PID 2488 set thread context of 3088	2488	bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe	kat3F1C.tmp

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:

kat3F1C.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3F1C.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3048 timeout.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

kat3F1C.tmp

pid process

3088 kat3F1C.tmp
3088 kat3F1C.tmp
3088 kat3F1C.tmp
3088 kat3F1C.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3F1C.tmp

pid	process
3048	timeout.exe

pid	process
3088	kat3F1C.tmp
3088	kat3F1C.tmp
3088	kat3F1C.tmp
3088	kat3F1C.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exekat3F1C.tmpcmd.exe

description	pid	process	target process
PID 2488 wrote to memory of 3088	2488	bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe	kat3F1C.tmp
PID 2488 wrote to memory of 3088	2488	bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe	kat3F1C.tmp
PID 2488 wrote to memory of 3088	2488	bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe	kat3F1C.tmp
PID 2488 wrote to memory of 3088	2488	bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe	kat3F1C.tmp
PID 2488 wrote to memory of 3088	2488	bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe	kat3F1C.tmp
PID 2488 wrote to memory of 3088	2488	bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe	kat3F1C.tmp
PID 2488 wrote to memory of 3088	2488	bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe	kat3F1C.tmp
PID 2488 wrote to memory of 3088	2488	bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe	kat3F1C.tmp
PID 3088 wrote to memory of 1348	3088	kat3F1C.tmp	cmd.exe
PID 3088 wrote to memory of 1348	3088	kat3F1C.tmp	cmd.exe
PID 3088 wrote to memory of 1348	3088	kat3F1C.tmp	cmd.exe
PID 1348 wrote to memory of 3048	1348	cmd.exe	timeout.exe
PID 1348 wrote to memory of 3048	1348	cmd.exe	timeout.exe
PID 1348 wrote to memory of 3048	1348	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe
"C:\Users\Admin\AppData\Local\Temp\bc320765a0218caa27ac51940913aba0497d8a5d8acdaf37e17ffc2e6ea28480.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2488

C:\Users\Admin\AppData\Local\Temp\kat3F1C.tmp
C:\Users\Admin\AppData\Local\Temp\kat3F1C.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3088

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat3F1C.tmp" & rd /s /q "C:\ProgramData\GHDHJEBFBFHJ" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1348

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:3048

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

4

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kat3F1C.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2488-9-0x0000000000400000-0x000000000060C000-memory.dmp

Filesize
2.0MB

Download
memory/2488-2-0x0000000004030000-0x0000000004179000-memory.dmp

Filesize
1.3MB

Download
memory/2488-0-0x0000000002360000-0x0000000002361000-memory.dmp

Filesize
4KB

Download
memory/3088-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-22-0x0000000026040000-0x000000002629F000-memory.dmp

Filesize
2.4MB

Download
memory/3088-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-38-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-54-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-55-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-66-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-67-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3088-68-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads