stealc | fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b

General

Target

fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe
Size

2.0MB
MD5

729d4e5a1a2b87dec4c0826b19ae26d9
SHA1

f4a8ee102aec4d8da680bdb33ee05668e553ba36
SHA256

fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b
SHA512

9af4d48f794bce1ec3b3f705fb66daf2b0fcb47a6693b1aa332af9b04588912a0d2656973e51fcbfa34517bbaaae89061ed680d0f4acf254317e96df68075aa8
SSDEEP

49152:OePpQEZJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEZtIuoITsdZ

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
behavioral1/memory/4632-1-0x0000000004050000-0x0000000004199000-memory.dmp	family_vidar_v7
behavioral1/memory/396-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/396-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/396-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/396-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/396-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/396-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/396-33-0x0000000000400000-0x0000000000646000-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:

katE88B.tmp

pid process

396 katE88B.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
396	katE88B.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe

description	pid	process	target process
PID 4632 set thread context of 396	4632	fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe	katE88B.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:

katE88B.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString katE88B.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

katE88B.tmp

pid process

396 katE88B.tmp
396 katE88B.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	katE88B.tmp

pid	process
396	katE88B.tmp
396	katE88B.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe

description	pid	process	target process
PID 4632 wrote to memory of 396	4632	fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe	katE88B.tmp
PID 4632 wrote to memory of 396	4632	fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe	katE88B.tmp
PID 4632 wrote to memory of 396	4632	fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe	katE88B.tmp
PID 4632 wrote to memory of 396	4632	fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe	katE88B.tmp
PID 4632 wrote to memory of 396	4632	fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe	katE88B.tmp
PID 4632 wrote to memory of 396	4632	fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe	katE88B.tmp
PID 4632 wrote to memory of 396	4632	fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe	katE88B.tmp
PID 4632 wrote to memory of 396	4632	fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe	katE88B.tmp

C:\Users\Admin\AppData\Local\Temp\fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe
"C:\Users\Admin\AppData\Local\Temp\fa04be0dda0d438e6af625d01c9fe0d6c87e0fb2e84546a9f4f8f52a86c3f80b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4632
- C:\Users\Admin\AppData\Local\Temp\katE88B.tmp
  C:\Users\Admin\AppData\Local\Temp\katE88B.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:396

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4036,i,17096020621006928097,15544233752327415349,262144 --variations-seed-version --mojo-platform-channel-handle=1320 /prefetch:8
1⤵
PID:1844

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\katE88B.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/396-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/396-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/396-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/396-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/396-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/396-17-0x000000001B7A0000-0x000000001B9FF000-memory.dmp

Filesize
2.4MB

Download
memory/396-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/396-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4632-0-0x0000000002280000-0x0000000002281000-memory.dmp

Filesize
4KB

Download
memory/4632-1-0x0000000004050000-0x0000000004199000-memory.dmp

Filesize
1.3MB

Download
memory/4632-9-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads