stealc | 40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad

General

Target

40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe
Size

1.6MB
MD5

c71bf0e332756f3b42cdd980f569abaa
SHA1

cb38436ad4eed6c0a1d4a783fdcea06423b53cec
SHA256

40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad
SHA512

be3c2a6b35df9b16f6334fe3186feb89d209c3371ac5d13e7c3399e6c25bdcdc05d7356cbf82ba49f957a152c1ec704817935126e86f2df0c6e5f8e7373471b3
SSDEEP

24576:spM5863IGfTAVpalBdUfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6BdUkxVVChjHZQs

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 15 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/1188-1-0x00000000040A0000-0x00000000041B0000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-9-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-22-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-23-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-24-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-41-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-57-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-64-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-71-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-76-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-77-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-78-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3900-84-0x0000000000400000-0x0000000000648000-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:

katF3A7.tmp

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	katF3A7.tmp

Executes dropped EXE 1 IoCs

Processes:

katF3A7.tmp

pid process

3900 katF3A7.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:

40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe

description	pid	process	target process
PID 1188 set thread context of 3900	1188	40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe	katF3A7.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:

katF3A7.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString katF3A7.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4472 timeout.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	katF3A7.tmp

pid	process
4472	timeout.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

katF3A7.tmp

pid	process
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp
3900	katF3A7.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exekatF3A7.tmpcmd.exe

description	pid	process	target process
PID 1188 wrote to memory of 3900	1188	40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe	katF3A7.tmp
PID 1188 wrote to memory of 3900	1188	40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe	katF3A7.tmp
PID 1188 wrote to memory of 3900	1188	40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe	katF3A7.tmp
PID 1188 wrote to memory of 3900	1188	40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe	katF3A7.tmp
PID 1188 wrote to memory of 3900	1188	40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe	katF3A7.tmp
PID 1188 wrote to memory of 3900	1188	40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe	katF3A7.tmp
PID 1188 wrote to memory of 3900	1188	40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe	katF3A7.tmp
PID 1188 wrote to memory of 3900	1188	40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe	katF3A7.tmp
PID 3900 wrote to memory of 2924	3900	katF3A7.tmp	cmd.exe
PID 3900 wrote to memory of 2924	3900	katF3A7.tmp	cmd.exe
PID 3900 wrote to memory of 2924	3900	katF3A7.tmp	cmd.exe
PID 2924 wrote to memory of 4472	2924	cmd.exe	timeout.exe
PID 2924 wrote to memory of 4472	2924	cmd.exe	timeout.exe
PID 2924 wrote to memory of 4472	2924	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe
"C:\Users\Admin\AppData\Local\Temp\40fdb908600a0889a4de1914aafd067fab61ddc342b3c33200baaa6f94ab81ad.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1188

C:\Users\Admin\AppData\Local\Temp\katF3A7.tmp
C:\Users\Admin\AppData\Local\Temp\katF3A7.tmp
2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3900

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\katF3A7.tmp" & rd /s /q "C:\ProgramData\HCGCBFHCFCFB" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:2924

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:4472

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=3532 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:3
1⤵
PID:4092

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=4164 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
1⤵
PID:1644

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\Network Persistent State
Filesize
1KB

MD5
1bfbeb3d2784ae106d11969473b8f6ef

SHA1
11b1479a0e43b4bf80e021d8d86df775cb82eab1

SHA256
5fb52305bb4420748c3fc0ecdeb67551241ddf303b853ee5af5d88b5229b39da

SHA512
e73b0d5f336c1f11ce4cd6e990458e2e6545a39dbc6ae113873fa8e0c048284a214f9f2b34074acf7990043f6a605b4520fb85bc5e1be8aeec99e6f9b2954b3d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports
Filesize
2B

MD5
d751713988987e9331980363e24189ce

SHA1
97d170e1550eee4afc0af065b78cda302a97674c

SHA256
4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

SHA512
b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

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

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C:\Users\Admin\AppData\Local\Temp\katF3A7.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1188-0-0x0000000002340000-0x0000000002341000-memory.dmp

Filesize
4KB

Download
memory/1188-1-0x00000000040A0000-0x00000000041B0000-memory.dmp

Filesize
1.1MB

Download
memory/1188-8-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download
memory/3900-26-0x000000001B760000-0x000000001B9BF000-memory.dmp

Filesize
2.4MB

Download
memory/3900-64-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-24-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-22-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-41-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-57-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-23-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-71-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-76-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-77-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-78-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-9-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-84-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3900-4-0x0000000000400000-0x0000000000648000-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