Malware Analysis Report

2024-09-11 15:21

Sample ID 240611-3xa5bawdqp
Target 55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419
SHA256 55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419
Tags
stealc vidar discovery spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419

Threat Level: Known bad

The file 55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419 was found to be: Known bad.

Malicious Activity Summary

stealc vidar discovery spyware stealer

Detect Vidar Stealer

Stealc

Vidar

Downloads MZ/PE file

Reads user/profile data of web browsers

Checks computer location settings

Executes dropped EXE

Reads data files stored by FTP clients

Accesses cryptocurrency files/wallets, possible credential harvesting

Checks installed software on the system

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Delays execution with timeout.exe

Suspicious behavior: EnumeratesProcesses

Checks processor information in registry

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Unsecured Credentials
T1552
Credentials In Files
T1552.001
Discovery
TA0007
Query Registry
T1012
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Data from Local System
T1005
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-11 23:53

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-11 23:53

Reported

2024-06-11 23:55

Platform

win10v2004-20240226-en

Max time kernel

142s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe"

Signatures

Detect Vidar Stealer

stealer
Description Indicator Process Target
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Stealc

stealer stealc

Vidar

stealer vidar

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A

Reads data files stored by FTP clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses cryptocurrency files/wallets, possible credential harvesting

spyware

Checks installed software on the system

discovery

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4064 set thread context of 3780 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\katEA1.tmp

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4064 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
PID 4064 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
PID 4064 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
PID 4064 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
PID 4064 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
PID 4064 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
PID 4064 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
PID 4064 wrote to memory of 3780 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\katEA1.tmp
PID 3780 wrote to memory of 5004 N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp C:\Windows\SysWOW64\cmd.exe
PID 3780 wrote to memory of 5004 N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp C:\Windows\SysWOW64\cmd.exe
PID 3780 wrote to memory of 5004 N/A C:\Users\Admin\AppData\Local\Temp\katEA1.tmp C:\Windows\SysWOW64\cmd.exe
PID 5004 wrote to memory of 1336 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 5004 wrote to memory of 1336 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 5004 wrote to memory of 1336 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe

"C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe"

C:\Users\Admin\AppData\Local\Temp\katEA1.tmp

C:\Users\Admin\AppData\Local\Temp\katEA1.tmp

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

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

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

C:\Windows\SysWOW64\timeout.exe

timeout /t 10

Network

Country Destination Domain Proto
US 8.8.8.8:53 t.me udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
NL 149.154.167.99:443 t.me tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
US 8.8.8.8:53 99.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 244.235.13.49.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
DE 49.13.235.244:5432 49.13.235.244 tcp
US 13.107.246.64:443 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 tcp
DE 49.13.235.244:5432 tcp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
DE 49.13.235.244:5432 49.13.235.244 tcp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 3.173.189.20.in-addr.arpa udp

Files

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

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

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

C:\Users\Admin\AppData\Local\Temp\katEA1.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

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

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

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

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

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

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

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

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

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

C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\SCT Auditing Pending Reports

MD5 d751713988987e9331980363e24189ce
SHA1 97d170e1550eee4afc0af065b78cda302a97674c
SHA256 4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945
SHA512 b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

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

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

C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network\Sdch Dictionaries

MD5 20d4b8fa017a12a108c87f540836e250
SHA1 1ac617fac131262b6d3ce1f52f5907e31d5f6f00
SHA256 6028bd681dbf11a0a58dde8a0cd884115c04caa59d080ba51bde1b086ce0079d
SHA512 507b2b8a8a168ff8f2bdafa5d9d341c44501a5f17d9f63f3d43bd586bc9e8ae33221887869fa86f845b7d067cb7d2a7009efd71dda36e03a40a74fee04b86856

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

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

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

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

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-11 23:53

Reported

2024-06-11 23:55

Platform

win11-20240508-en

Max time kernel

146s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe"

Signatures

Detect Vidar Stealer

stealer
Description Indicator Process Target
N/A N/A N/A N/A
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N/A N/A N/A N/A

Stealc

stealer stealc

Vidar

stealer vidar

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat9664.tmp N/A

Reads data files stored by FTP clients

spyware stealer

Checks installed software on the system

discovery

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 5060 set thread context of 1088 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\kat9664.tmp

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Users\Admin\AppData\Local\Temp\kat9664.tmp N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat9664.tmp N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\kat9664.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 5060 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\kat9664.tmp
PID 5060 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\kat9664.tmp
PID 5060 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\kat9664.tmp
PID 5060 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\kat9664.tmp
PID 5060 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\kat9664.tmp
PID 5060 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\kat9664.tmp
PID 5060 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\kat9664.tmp
PID 5060 wrote to memory of 1088 N/A C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe C:\Users\Admin\AppData\Local\Temp\kat9664.tmp
PID 1088 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\kat9664.tmp C:\Windows\SysWOW64\cmd.exe
PID 1088 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\kat9664.tmp C:\Windows\SysWOW64\cmd.exe
PID 1088 wrote to memory of 2228 N/A C:\Users\Admin\AppData\Local\Temp\kat9664.tmp C:\Windows\SysWOW64\cmd.exe
PID 2228 wrote to memory of 3272 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2228 wrote to memory of 3272 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2228 wrote to memory of 3272 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe

"C:\Users\Admin\AppData\Local\Temp\55b307c0d533906bd6cc7995db0d4c7f05d41ef40e36dfcbe1df2c445691d419.exe"

C:\Users\Admin\AppData\Local\Temp\kat9664.tmp

C:\Users\Admin\AppData\Local\Temp\kat9664.tmp

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat9664.tmp" & rd /s /q "C:\ProgramData\KKKKEHJKFCFC" & exit

C:\Windows\SysWOW64\timeout.exe

timeout /t 10

Network

Country Destination Domain Proto
US 8.8.8.8:53 t.me udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 steamcommunity.com udp

Files

memory/5060-0-0x00000000024F0000-0x00000000024F1000-memory.dmp

memory/5060-1-0x0000000003FB0000-0x00000000040C0000-memory.dmp

memory/1088-4-0x0000000000400000-0x0000000000648000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\kat9664.tmp

MD5 66064dbdb70a5eb15ebf3bf65aba254b
SHA1 0284fd320f99f62aca800fb1251eff4c31ec4ed7
SHA256 6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795
SHA512 b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

memory/1088-8-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1088-9-0x0000000000400000-0x0000000000648000-memory.dmp

memory/5060-10-0x0000000000400000-0x0000000000594000-memory.dmp

memory/1088-12-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1088-13-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1088-14-0x0000000000400000-0x0000000000648000-memory.dmp

memory/1088-17-0x0000000000400000-0x0000000000648000-memory.dmp