stealc | f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2

General

Target

f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe
Size

1.8MB
MD5

4ea5d20cfc6435c8c4fd9611227562ef
SHA1

2b51c5dea96dc64d445cdb3ab35930c49a9c4826
SHA256

f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2
SHA512

44cecfc6712f6c8190fbde10e5c1c97c28a6de9066435b0b7e03b2bcdfc5f4f36d5e4ddf408757ab0f8d6a8558167399be249658aee664065584c15acb35c153
SSDEEP

49152:k75B7FDFXbFYa8aesY3Ot4N7G/IeUAtK:k75RFDfn0etD/INAt

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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

resource	yara_rule
behavioral1/memory/1528-2-0x0000000002A40000-0x0000000002B8B000-memory.dmp	family_vidar_v7
behavioral1/memory/3220-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3220-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3220-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3220-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3220-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3220-40-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3220-41-0x0000000000400000-0x0000000000648000-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

pid	Process
3220	katF9F0.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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1528 set thread context of 3220	1528	f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe	103

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	katF9F0.tmp

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3220	katF9F0.tmp
3220	katF9F0.tmp

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1528 wrote to memory of 3220	1528	f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe	103
PID 1528 wrote to memory of 3220	1528	f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe	103
PID 1528 wrote to memory of 3220	1528	f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe	103
PID 1528 wrote to memory of 3220	1528	f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe	103
PID 1528 wrote to memory of 3220	1528	f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe	103
PID 1528 wrote to memory of 3220	1528	f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe	103
PID 1528 wrote to memory of 3220	1528	f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe	103
PID 1528 wrote to memory of 3220	1528	f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe	103

C:\Users\Admin\AppData\Local\Temp\f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe
"C:\Users\Admin\AppData\Local\Temp\f53fc0c4193235da888454911bac9ce15131147c7d7c8e8b8b3983d2aee3fcb2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1528
- C:\Users\Admin\AppData\Local\Temp\katF9F0.tmp
  C:\Users\Admin\AppData\Local\Temp\katF9F0.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:3220

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=3888,i,13281073920029625837,8253721632651544158,262144 --variations-seed-version --mojo-platform-channel-handle=3628 /prefetch:8
1⤵
PID:4472

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\katF9F0.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1528-0-0x0000000000780000-0x0000000000781000-memory.dmp

Filesize
4KB

Download
memory/1528-2-0x0000000002A40000-0x0000000002B8B000-memory.dmp

Filesize
1.3MB

Download
memory/1528-9-0x0000000000400000-0x00000000005CD000-memory.dmp

Filesize
1.8MB

Download
memory/3220-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3220-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3220-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3220-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3220-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3220-25-0x000000001DC20000-0x000000001DE7F000-memory.dmp

Filesize
2.4MB

Download
memory/3220-40-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3220-41-0x0000000000400000-0x0000000000648000-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