stealc | 3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb

General

Target

3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe
Size

1.9MB
MD5

6b171d2c0816650fb0de45f04c42bb07
SHA1

964dc7a8f3999bdfaeceeb30d00d5a084f369546
SHA256

3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb
SHA512

a1f8913719420a09491fc7ee00ec512a474aa31c1b64c9d673351c9f5cc04a1f566b461eb745014d4e09807d1f64d0ffef69edf07674f2833995a7f00d96a386
SSDEEP

49152:CdKfTn6vCJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnRtIuoITsdZ

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 9 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/1496-1-0x0000000004170000-0x00000000042B9000-memory.dmp	family_vidar_v7
behavioral1/memory/4164-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4164-8-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4164-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4164-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4164-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4164-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4164-33-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/4164-34-0x0000000000400000-0x0000000000646000-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:

kat1604.tmp

pid process

4164 kat1604.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
4164	kat1604.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe

description	pid	process	target process
PID 1496 set thread context of 4164	1496	3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe	kat1604.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:

kat1604.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat1604.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat1604.tmp

pid process

4164 kat1604.tmp
4164 kat1604.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat1604.tmp

pid	process
4164	kat1604.tmp
4164	kat1604.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe

description	pid	process	target process
PID 1496 wrote to memory of 4164	1496	3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe	kat1604.tmp
PID 1496 wrote to memory of 4164	1496	3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe	kat1604.tmp
PID 1496 wrote to memory of 4164	1496	3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe	kat1604.tmp
PID 1496 wrote to memory of 4164	1496	3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe	kat1604.tmp
PID 1496 wrote to memory of 4164	1496	3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe	kat1604.tmp
PID 1496 wrote to memory of 4164	1496	3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe	kat1604.tmp
PID 1496 wrote to memory of 4164	1496	3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe	kat1604.tmp
PID 1496 wrote to memory of 4164	1496	3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe	kat1604.tmp

C:\Users\Admin\AppData\Local\Temp\3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe
"C:\Users\Admin\AppData\Local\Temp\3bcef9701945ae62a5f2b479afff7ea777fbd297a23e2387582dc2cb7f1578fb.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1496
- C:\Users\Admin\AppData\Local\Temp\kat1604.tmp
  C:\Users\Admin\AppData\Local\Temp\kat1604.tmp
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:4164

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 --mojo-platform-channel-handle=4240 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
1⤵
PID:376

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\kat1604.tmp

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1496-9-0x0000000000400000-0x00000000005EC000-memory.dmp

Filesize
1.9MB

Download
memory/1496-1-0x0000000004170000-0x00000000042B9000-memory.dmp

Filesize
1.3MB

Download
memory/1496-0-0x0000000002390000-0x0000000002391000-memory.dmp

Filesize
4KB

Download
memory/4164-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-8-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-18-0x000000001DBA0000-0x000000001DDFF000-memory.dmp

Filesize
2.4MB

Download
memory/4164-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4164-34-0x0000000000400000-0x0000000000646000-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