stealc | 4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5

General

Target

4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe
Size

1.6MB
MD5

3892653352cff70ec13da5c1f91ba171
SHA1

1da97b04ee6596f2e795f9c5ddb28939de96d192
SHA256

4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5
SHA512

c46cea399bfa6eb0288ac78e9fa8d721a1edcf2850c856b7e0515b3240c660b920b31f931638eca19373088eee6825dd55ca8c18c7786382733f9adefd5cf17d
SSDEEP

24576:spM5863IGfTAVpalB+UfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6B+UkxVVChjHZQs

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 16 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/1380-2-0x0000000004170000-0x0000000004280000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-5-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-11-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-25-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-42-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-43-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-59-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-60-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-77-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-78-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-79-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-80-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/4560-87-0x0000000000400000-0x0000000000648000-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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

katEB89.tmp

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	katEB89.tmp

Executes dropped EXE 1 IoCs

Processes:

katEB89.tmp

pid process

4560 katEB89.tmp
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

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

Processes:

4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe

description	pid	process	target process
PID 1380 set thread context of 4560	1380	4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe	katEB89.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
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:

katEB89.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString katEB89.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2056 timeout.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	katEB89.tmp

pid	process
2056	timeout.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

katEB89.tmp

pid	process
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp
4560	katEB89.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exekatEB89.tmpcmd.exe

description	pid	process	target process
PID 1380 wrote to memory of 4560	1380	4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe	katEB89.tmp
PID 1380 wrote to memory of 4560	1380	4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe	katEB89.tmp
PID 1380 wrote to memory of 4560	1380	4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe	katEB89.tmp
PID 1380 wrote to memory of 4560	1380	4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe	katEB89.tmp
PID 1380 wrote to memory of 4560	1380	4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe	katEB89.tmp
PID 1380 wrote to memory of 4560	1380	4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe	katEB89.tmp
PID 1380 wrote to memory of 4560	1380	4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe	katEB89.tmp
PID 1380 wrote to memory of 4560	1380	4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe	katEB89.tmp
PID 4560 wrote to memory of 4608	4560	katEB89.tmp	cmd.exe
PID 4560 wrote to memory of 4608	4560	katEB89.tmp	cmd.exe
PID 4560 wrote to memory of 4608	4560	katEB89.tmp	cmd.exe
PID 4608 wrote to memory of 2056	4608	cmd.exe	timeout.exe
PID 4608 wrote to memory of 2056	4608	cmd.exe	timeout.exe
PID 4608 wrote to memory of 2056	4608	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe
"C:\Users\Admin\AppData\Local\Temp\4a4bb1f58d36dfc348999f8b6b6eea6fc8086bc27816600ab2fc0615293adad5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1380

C:\Users\Admin\AppData\Local\Temp\katEB89.tmp
C:\Users\Admin\AppData\Local\Temp\katEB89.tmp
2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4560

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\katEB89.tmp" & rd /s /q "C:\ProgramData\DGCGDBGCAAEB" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:4608

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:2056

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=2676 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:3
1⤵
PID:1440

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=1404 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:3320

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\82f5e91f-40f9-4294-be48-faab75e13411.tmp
Filesize
2B

MD5
d751713988987e9331980363e24189ce

SHA1
97d170e1550eee4afc0af065b78cda302a97674c

SHA256
4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

SHA512
b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Network Persistent State
Filesize
1KB

MD5
ae5d04a5160df253492465869e18643a

SHA1
1edbae3e0819ce40eb1be3a834a59634da18b11a

SHA256
0e9610233cfc593c3def51e3b012e005e3e9b7297d372c210e0e4267ef34a5c7

SHA512
278c9ca143406d99f90d535404f36630b46711582c2917db98dcd7c53ed0f9568dd6c9fbf9296e97dcf4d5625c65a564a2a10e058befc14ff4932cbcce850de2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries
Filesize
40B

MD5
20d4b8fa017a12a108c87f540836e250

SHA1
1ac617fac131262b6d3ce1f52f5907e31d5f6f00

SHA256
6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d

SHA512
507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

Download Submit
C:\Users\Admin\AppData\Local\Temp\katEB89.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1380-0-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download
memory/1380-1-0x0000000002330000-0x0000000002331000-memory.dmp

Filesize
4KB

Download
memory/1380-2-0x0000000004170000-0x0000000004280000-memory.dmp

Filesize
1.1MB

Download
memory/1380-10-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download
memory/4560-42-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-60-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-25-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-27-0x0000000019320000-0x000000001957F000-memory.dmp

Filesize
2.4MB

Download
memory/4560-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-43-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-59-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-11-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-77-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-78-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-79-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-80-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-87-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4560-5-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads