stealc | 178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918

General

Target

178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe
Size

2.0MB
MD5

255e5434e6e42720548110f720b2be96
SHA1

663e245882a10331704d253727ac5ccf2df9f34e
SHA256

178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918
SHA512

9fe2999ec977e0f9ee9b6e76bd5ebde1e628f1dd3fb9a92be4de7cf151894030eede02d00338c019257e9009c1af77b50281f1573dd17646ff429eab350a6e75
SSDEEP

49152:OePpQElJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEltIuoITsdZ

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 10 IoCs

stealer

Processes:

resource	yara_rule
behavioral2/memory/1432-1-0x00000000041A0000-0x00000000042E9000-memory.dmp	family_vidar_v7
behavioral2/memory/4404-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4404-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4404-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4404-12-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4404-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4404-16-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4404-17-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4404-34-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral2/memory/4404-35-0x0000000000400000-0x0000000000646000-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:

kat3738.tmp

pid process

4404 kat3738.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
4404	kat3738.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe

description	pid	process	target process
PID 1432 set thread context of 4404	1432	178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe	kat3738.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:

kat3738.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3738.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat3738.tmp

pid process

4404 kat3738.tmp
4404 kat3738.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3738.tmp

pid	process
4404	kat3738.tmp
4404	kat3738.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe

description	pid	process	target process
PID 1432 wrote to memory of 4404	1432	178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe	kat3738.tmp
PID 1432 wrote to memory of 4404	1432	178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe	kat3738.tmp
PID 1432 wrote to memory of 4404	1432	178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe	kat3738.tmp
PID 1432 wrote to memory of 4404	1432	178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe	kat3738.tmp
PID 1432 wrote to memory of 4404	1432	178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe	kat3738.tmp
PID 1432 wrote to memory of 4404	1432	178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe	kat3738.tmp
PID 1432 wrote to memory of 4404	1432	178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe	kat3738.tmp
PID 1432 wrote to memory of 4404	1432	178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe	kat3738.tmp

C:\Users\Admin\AppData\Local\Temp\178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe
"C:\Users\Admin\AppData\Local\Temp\178c3d0349034b35c75f0e369ac453b67410e52cc282fa3233c34f8faf4e5918.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1432

C:\Users\Admin\AppData\Local\Temp\kat3738.tmp
C:\Users\Admin\AppData\Local\Temp\kat3738.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:4404

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=3760 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
1⤵
PID:2440

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\kat3738.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1432-8-0x0000000000400000-0x0000000000612000-memory.dmp

Filesize
2.1MB

Download
memory/1432-1-0x00000000041A0000-0x00000000042E9000-memory.dmp

Filesize
1.3MB

Download
memory/1432-0-0x0000000000810000-0x0000000000811000-memory.dmp

Filesize
4KB

Download
memory/4404-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4404-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4404-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4404-12-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4404-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4404-16-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4404-17-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4404-19-0x000000001B890000-0x000000001BAEF000-memory.dmp

Filesize
2.4MB

Download
memory/4404-34-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/4404-35-0x0000000000400000-0x0000000000646000-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