stealc | f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14

General

Target

f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe
Size

1.9MB
MD5

084121611060b1d0f783a6bfc7babc71
SHA1

9ae1d13f9966be50fe0c462d65f1c5b6b1d34906
SHA256

f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14
SHA512

3b0db0a4453542dd01aee0b88b347d8fc3171880bef6d98a4e04886fb0d7f8d7d5da5efa4d83b8dec0581cf27b4a25b5b50be4ed84ebe6a5dcbc101de30a59e4
SSDEEP

49152:CdKfTn6vyJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnxtIuoITsdZ

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 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/2752-3-0x0000000004060000-0x00000000041A9000-memory.dmp	family_vidar_v7
behavioral2/memory/3680-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3680-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3680-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3680-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3680-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3680-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/3680-38-0x0000000000400000-0x0000000000646000-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:

kat5B20.tmp

pid process

3680 kat5B20.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

pid	process
3680	kat5B20.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe

description	pid	process	target process
PID 2752 set thread context of 3680	2752	f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe	kat5B20.tmp

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:

kat5B20.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat5B20.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat5B20.tmp

pid process

3680 kat5B20.tmp
3680 kat5B20.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat5B20.tmp

pid	process
3680	kat5B20.tmp
3680	kat5B20.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe

description	pid	process	target process
PID 2752 wrote to memory of 3680	2752	f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe	kat5B20.tmp
PID 2752 wrote to memory of 3680	2752	f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe	kat5B20.tmp
PID 2752 wrote to memory of 3680	2752	f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe	kat5B20.tmp
PID 2752 wrote to memory of 3680	2752	f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe	kat5B20.tmp
PID 2752 wrote to memory of 3680	2752	f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe	kat5B20.tmp
PID 2752 wrote to memory of 3680	2752	f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe	kat5B20.tmp
PID 2752 wrote to memory of 3680	2752	f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe	kat5B20.tmp
PID 2752 wrote to memory of 3680	2752	f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe	kat5B20.tmp

C:\Users\Admin\AppData\Local\Temp\f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe
"C:\Users\Admin\AppData\Local\Temp\f2d71666c53e10ef26339537787b33c49988b5d095316153926fe739dd129a14.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Users\Admin\AppData\Local\Temp\kat5B20.tmp
  C:\Users\Admin\AppData\Local\Temp\kat5B20.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3680

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat5B20.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/2752-0-0x0000000002320000-0x0000000002321000-memory.dmp

Filesize
4KB

Download
memory/2752-3-0x0000000004060000-0x00000000041A9000-memory.dmp

Filesize
1.3MB

Download
memory/2752-10-0x0000000000400000-0x00000000005EC000-memory.dmp

Filesize
1.9MB

Download
memory/3680-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3680-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3680-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3680-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3680-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3680-23-0x00000000260B0000-0x000000002630F000-memory.dmp

Filesize
2.4MB

Download
memory/3680-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3680-38-0x0000000000400000-0x0000000000646000-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