Malware Analysis Report

2025-05-05 21:46

Sample ID 240829-syw33a1clk
Target regasm.exe
SHA256 e93063292dbb2c3209541ea13e57d0cca3225f35eb18977d2b3400a97255a49d
Tags
vipkeylogger collection credential_access discovery keylogger spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

e93063292dbb2c3209541ea13e57d0cca3225f35eb18977d2b3400a97255a49d

Threat Level: Known bad

The file regasm.exe was found to be: Known bad.

Malicious Activity Summary

vipkeylogger collection credential_access discovery keylogger spyware stealer

VIPKeylogger

Credentials from Password Stores: Credentials from Web Browsers

Reads user/profile data of web browsers

Reads user/profile data of local email clients

Looks up external IP address via web service

Accesses Microsoft Outlook profiles

Suspicious use of SetThreadContext

Browser Information Discovery

System Location Discovery: System Language Discovery

Unsigned PE

outlook_office_path

outlook_win_path

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-29 15:32

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-29 15:32

Reported

2024-08-29 15:35

Platform

win7-20240704-en

Max time kernel

139s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\regasm.exe"

Signatures

VIPKeylogger

stealer keylogger vipkeylogger

Credentials from Password Stores: Credentials from Web Browsers

credential_access stealer

Reads user/profile data of local email clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook profiles

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A checkip.dyndns.org N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1980 set thread context of 2492 N/A C:\Users\Admin\AppData\Local\Temp\regasm.exe C:\Users\Admin\AppData\Local\Temp\regasm.exe

Browser Information Discovery

discovery

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\regasm.exe

"C:\Users\Admin\AppData\Local\Temp\regasm.exe"

C:\Users\Admin\AppData\Local\Temp\regasm.exe

"C:\Users\Admin\AppData\Local\Temp\regasm.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 checkip.dyndns.org udp
US 193.122.130.0:80 checkip.dyndns.org tcp
US 8.8.8.8:53 reallyfreegeoip.org udp
US 172.67.177.134:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 api.telegram.org udp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 smtp.coxenregy.com udp
US 208.91.199.223:25 smtp.coxenregy.com tcp
US 208.91.199.224:25 smtp.coxenregy.com tcp
US 208.91.199.225:25 smtp.coxenregy.com tcp
US 208.91.198.143:25 smtp.coxenregy.com tcp

Files

memory/1980-0-0x0000000073F6E000-0x0000000073F6F000-memory.dmp

memory/1980-1-0x00000000001C0000-0x0000000000274000-memory.dmp

memory/1980-2-0x0000000073F60000-0x000000007464E000-memory.dmp

memory/1980-3-0x0000000000360000-0x0000000000372000-memory.dmp

memory/1980-4-0x0000000073F6E000-0x0000000073F6F000-memory.dmp

memory/1980-5-0x0000000073F60000-0x000000007464E000-memory.dmp

memory/1980-6-0x00000000003A0000-0x00000000003AE000-memory.dmp

memory/1980-7-0x0000000004D80000-0x0000000004E0C000-memory.dmp

memory/2492-8-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2492-14-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2492-16-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2492-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2492-11-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2492-10-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2492-18-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2492-9-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2492-19-0x0000000073F60000-0x000000007464E000-memory.dmp

memory/1980-20-0x0000000073F60000-0x000000007464E000-memory.dmp

memory/2492-21-0x0000000073F60000-0x000000007464E000-memory.dmp

memory/2492-22-0x0000000073F60000-0x000000007464E000-memory.dmp

memory/2492-23-0x0000000073F60000-0x000000007464E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-29 15:32

Reported

2024-08-29 15:35

Platform

win10v2004-20240802-en

Max time kernel

134s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\regasm.exe"

Signatures

VIPKeylogger

stealer keylogger vipkeylogger

Credentials from Password Stores: Credentials from Web Browsers

credential_access stealer

Reads user/profile data of local email clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook profiles

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A checkip.dyndns.org N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4516 set thread context of 4528 N/A C:\Users\Admin\AppData\Local\Temp\regasm.exe C:\Users\Admin\AppData\Local\Temp\regasm.exe

Browser Information Discovery

discovery

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\regasm.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\regasm.exe

"C:\Users\Admin\AppData\Local\Temp\regasm.exe"

C:\Users\Admin\AppData\Local\Temp\regasm.exe

"C:\Users\Admin\AppData\Local\Temp\regasm.exe"

C:\Users\Admin\AppData\Local\Temp\regasm.exe

"C:\Users\Admin\AppData\Local\Temp\regasm.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 checkip.dyndns.org udp
JP 132.226.8.169:80 checkip.dyndns.org tcp
US 8.8.8.8:53 reallyfreegeoip.org udp
US 188.114.96.0:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 169.8.226.132.in-addr.arpa udp
US 8.8.8.8:53 0.96.114.188.in-addr.arpa udp
US 8.8.8.8:53 api.telegram.org udp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 220.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 smtp.coxenregy.com udp
US 208.91.199.223:25 smtp.coxenregy.com tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 37.56.20.217.in-addr.arpa udp
US 208.91.199.225:25 smtp.coxenregy.com tcp
US 208.91.199.224:25 smtp.coxenregy.com tcp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 208.91.198.143:25 smtp.coxenregy.com tcp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp

Files

memory/4516-0-0x00000000746FE000-0x00000000746FF000-memory.dmp

memory/4516-1-0x0000000000770000-0x0000000000824000-memory.dmp

memory/4516-2-0x00000000058B0000-0x0000000005E54000-memory.dmp

memory/4516-3-0x0000000005210000-0x00000000052A2000-memory.dmp

memory/4516-4-0x00000000052E0000-0x00000000052EA000-memory.dmp

memory/4516-5-0x00000000746F0000-0x0000000074EA0000-memory.dmp

memory/4516-6-0x00000000054C0000-0x00000000054D2000-memory.dmp

memory/4516-7-0x00000000746FE000-0x00000000746FF000-memory.dmp

memory/4516-8-0x00000000746F0000-0x0000000074EA0000-memory.dmp

memory/4516-9-0x00000000055F0000-0x00000000055FE000-memory.dmp

memory/4516-10-0x00000000064F0000-0x000000000657C000-memory.dmp

memory/4516-11-0x0000000009010000-0x00000000090AC000-memory.dmp

memory/4528-12-0x0000000000400000-0x000000000044A000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\regasm.exe.log

MD5 8ec831f3e3a3f77e4a7b9cd32b48384c
SHA1 d83f09fd87c5bd86e045873c231c14836e76a05c
SHA256 7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982
SHA512 26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

memory/4516-15-0x00000000746F0000-0x0000000074EA0000-memory.dmp

memory/4528-16-0x00000000746F0000-0x0000000074EA0000-memory.dmp

memory/4528-17-0x00000000746F0000-0x0000000074EA0000-memory.dmp

memory/4528-18-0x00000000746F0000-0x0000000074EA0000-memory.dmp

memory/4528-19-0x0000000006580000-0x0000000006742000-memory.dmp

memory/4528-20-0x0000000006400000-0x0000000006450000-memory.dmp

memory/4528-21-0x0000000006C80000-0x00000000071AC000-memory.dmp