stealc | 55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419

General

Target

55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe
Size

1.6MB
MD5

923cee9f42bc76e2c5336a0a91c956b8
SHA1

2fef488280a4de7a1f0915a6d5f7eab15e9d1fdb
SHA256

55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419
SHA512

5470299d522ea86090ab3a1890656680c8806f60b3ac264845072616edd63166a21eddf9b9170b72aee5afb65cec817998c469a8a6f3c4261e479d5ca997eecc
SSDEEP

24576:spM5863IGfTAVpalB1UfMxVVtes12FxwojKr98YGeGG9i:spQLYkTYp6B1UkxVVChjHZQs

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/4064-1-0x0000000004160000-0x0000000004270000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-4-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-8-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-10-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-15-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-16-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-34-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-35-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-51-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-64-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-65-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-75-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-76-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-77-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-78-0x0000000000400000-0x0000000000648000-memory.dmp	family_vidar_v7
behavioral1/memory/3780-80-0x0000000000400000-0x0000000000648000-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:

katEA1.tmp

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation katEA1.tmp
Executes dropped EXE 1 IoCs

Processes:

katEA1.tmp

pid process

3780 katEA1.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

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	katEA1.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe

description	pid	process	target process
PID 4064 set thread context of 3780	4064	55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe	katEA1.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:

katEA1.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString katEA1.tmp
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1336 timeout.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	katEA1.tmp

pid	process
1336	timeout.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

katEA1.tmp

pid	process
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp
3780	katEA1.tmp

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exekatEA1.tmpcmd.exe

description	pid	process	target process
PID 4064 wrote to memory of 3780	4064	55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe	katEA1.tmp
PID 4064 wrote to memory of 3780	4064	55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe	katEA1.tmp
PID 4064 wrote to memory of 3780	4064	55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe	katEA1.tmp
PID 4064 wrote to memory of 3780	4064	55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe	katEA1.tmp
PID 4064 wrote to memory of 3780	4064	55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe	katEA1.tmp
PID 4064 wrote to memory of 3780	4064	55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe	katEA1.tmp
PID 4064 wrote to memory of 3780	4064	55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe	katEA1.tmp
PID 4064 wrote to memory of 3780	4064	55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe	katEA1.tmp
PID 3780 wrote to memory of 5004	3780	katEA1.tmp	cmd.exe
PID 3780 wrote to memory of 5004	3780	katEA1.tmp	cmd.exe
PID 3780 wrote to memory of 5004	3780	katEA1.tmp	cmd.exe
PID 5004 wrote to memory of 1336	5004	cmd.exe	timeout.exe
PID 5004 wrote to memory of 1336	5004	cmd.exe	timeout.exe
PID 5004 wrote to memory of 1336	5004	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe
"C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4064

C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
2⤵
- Checks computer location settings
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3780

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\katEA1.tmp" & rd /s /q "C:\ProgramData\GIJKKKFCFHCF" & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:5004

C:\Windows\SysWOW64\timeout.exe
timeout /t 10
4⤵
- Delays execution with timeout.exe
PID:1336

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=1040 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:3
1⤵
PID:1028

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=3528 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:8
1⤵
PID:2192

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\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

Download Submit
C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/3780-65-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-51-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-80-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-10-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-15-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-16-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-19-0x000000001B7C0000-0x000000001BA1F000-memory.dmp

Filesize
2.4MB

Download
memory/3780-34-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-35-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-8-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-4-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-64-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-78-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-77-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-75-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/3780-76-0x0000000000400000-0x0000000000648000-memory.dmp

Filesize
2.3MB

Download
memory/4064-1-0x0000000004160000-0x0000000004270000-memory.dmp

Filesize
1.1MB

Download
memory/4064-0-0x0000000000890000-0x0000000000891000-memory.dmp

Filesize
4KB

Download
memory/4064-9-0x0000000000400000-0x0000000000594000-memory.dmp

Filesize
1.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads