stealc | 1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9

General

Target

1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe
Size

2.4MB
MD5

b3a53a41f415ab344937b86d5f39eabb
SHA1

74cc99a3b6da3ee47d6e8e44276b3d3dbc998a03
SHA256

1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9
SHA512

5060a9de5387f2940234ce12abf8869b1e8099e97d09175c0c7f4621dfe3613b2ab75fa0a151cf2243660a8dcee7dfc035f32b82a04acf94e729c30a9d772f0b
SSDEEP

49152:jxIRJF1HL+VdX68kUeJtTF+TxMoxc1TU+j+dAzGwlrh:jEJF16dX68detIuoITsdZ

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/4168-2-0x00000000041F0000-0x0000000004339000-memory.dmp	family_vidar_v7
behavioral2/memory/4804-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4804-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4804-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4804-19-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4804-20-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4804-37-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4804-38-0x0000000000400000-0x0000000000646000-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:

kat2FDA.tmp

pid process

4804 kat2FDA.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
4804	kat2FDA.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe

description	pid	process	target process
PID 4168 set thread context of 4804	4168	1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe	kat2FDA.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:

kat2FDA.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat2FDA.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat2FDA.tmp

pid process

4804 kat2FDA.tmp
4804 kat2FDA.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat2FDA.tmp

pid	process
4804	kat2FDA.tmp
4804	kat2FDA.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe

description	pid	process	target process
PID 4168 wrote to memory of 4804	4168	1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe	kat2FDA.tmp
PID 4168 wrote to memory of 4804	4168	1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe	kat2FDA.tmp
PID 4168 wrote to memory of 4804	4168	1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe	kat2FDA.tmp
PID 4168 wrote to memory of 4804	4168	1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe	kat2FDA.tmp
PID 4168 wrote to memory of 4804	4168	1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe	kat2FDA.tmp
PID 4168 wrote to memory of 4804	4168	1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe	kat2FDA.tmp
PID 4168 wrote to memory of 4804	4168	1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe	kat2FDA.tmp
PID 4168 wrote to memory of 4804	4168	1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe	kat2FDA.tmp

C:\Users\Admin\AppData\Local\Temp\1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe
"C:\Users\Admin\AppData\Local\Temp\1cb762f6c9fc262dc75c639862cfcfaea947f7c5e6a4983b33ddd5a1118e3bf9.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4168
- C:\Users\Admin\AppData\Local\Temp\kat2FDA.tmp
  C:\Users\Admin\AppData\Local\Temp\kat2FDA.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4804

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\kat2FDA.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/4168-0-0x0000000000880000-0x0000000000881000-memory.dmp

Filesize
4KB

Download
memory/4168-2-0x00000000041F0000-0x0000000004339000-memory.dmp

Filesize
1.3MB

Download
memory/4168-9-0x0000000000400000-0x0000000000678000-memory.dmp

Filesize
2.5MB

Download
memory/4804-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4804-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4804-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4804-19-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4804-20-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4804-22-0x00000000284A0000-0x00000000286FF000-memory.dmp

Filesize
2.4MB

Download
memory/4804-37-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4804-38-0x0000000000400000-0x0000000000646000-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