masslogger | a96a475be3398490fb0cb4e92cb758e7c8bba0f866f8fec08349043c7ea8313c

General

Target

Emailer ? Quarterly Tax Returns for April and March 2020.exe
Size

2.3MB
MD5

48beacc3662cc5784bb8bd925958f50b
SHA1

c17b246dbbaa86c3e252b2978ce747456cfba241
SHA256

6033acde8c4bde98b22ad4e45db8bc34123e794019b42750a3430ba97e33c804
SHA512

68757d4af66fb544321cf25ec10695fd3d6e9bbc89b3bcdde27c3fde49f7c85998976a2ee6c32cbb18a3a6cac9c08d9c7e4444796a03364bf1803256226d9042

Score

10^/10

masslogger collection persistence spyware stealer upx

Malware Config

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger
MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.

Processes:

yara_rule

masslogger_log_file

yara_rule
masslogger_log_file

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Costura\8E3603ED8A0381E02887C1DBBE921340\32\sqlite.interop.dll	acprotect

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Costura\8E3603ED8A0381E02887C1DBBE921340\32\sqlite.interop.dll	upx

Loads dropped DLL 1 IoCs

Processes:

InstallUtil.exe

pid process

4324 InstallUtil.exe

pid	process
4324	InstallUtil.exe

Accesses Microsoft Outlook profiles 1 TTPs 18 IoCs

collection

Email Collection

T1114

Processes:

InstallUtil.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	InstallUtil.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	InstallUtil.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	InstallUtil.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook	InstallUtil.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key opened	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	InstallUtil.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook	InstallUtil.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Emailer _ Quarterly Tax Returns for April and March 2020.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wFkna = "C:\\TLWHJTYB\\wFknaA\\wFknaAqbs.vbs"	Emailer _ Quarterly Tax Returns for April and March 2020.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

26 api.ipify.org

flow	ioc
26	api.ipify.org

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

Emailer _ Quarterly Tax Returns for April and March 2020.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Emailer _ Quarterly Tax Returns for April and March 2020.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	Emailer _ Quarterly Tax Returns for April and March 2020.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Emailer _ Quarterly Tax Returns for April and March 2020.exe

description	pid	process	target process
PID 2468 set thread context of 4324	2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe	InstallUtil.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

InstallUtil.exe

pid process

4324 InstallUtil.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

InstallUtil.exe

pid process

4324 InstallUtil.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

Emailer _ Quarterly Tax Returns for April and March 2020.exe

pid process

2468 Emailer _ Quarterly Tax Returns for April and March 2020.exe
2468 Emailer _ Quarterly Tax Returns for April and March 2020.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

InstallUtil.exe

description pid process

Token: SeDebugPrivilege 4324 InstallUtil.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

InstallUtil.exe

pid process

4324 InstallUtil.exe

pid	process
4324	InstallUtil.exe

pid	process
4324	InstallUtil.exe

pid	process
2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe
2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe

description	pid	process
Token: SeDebugPrivilege	4324	InstallUtil.exe

pid	process
4324	InstallUtil.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

Emailer _ Quarterly Tax Returns for April and March 2020.exe

description	pid	process	target process
PID 2468 wrote to memory of 2400	2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe	InstallUtil.exe
PID 2468 wrote to memory of 2400	2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe	InstallUtil.exe
PID 2468 wrote to memory of 2400	2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe	InstallUtil.exe
PID 2468 wrote to memory of 4324	2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe	InstallUtil.exe
PID 2468 wrote to memory of 4324	2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe	InstallUtil.exe
PID 2468 wrote to memory of 4324	2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe	InstallUtil.exe
PID 2468 wrote to memory of 4324	2468	Emailer _ Quarterly Tax Returns for April and March 2020.exe	InstallUtil.exe

outlook_office_path 1 IoCs

Processes:

InstallUtil.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe

outlook_win_path 1 IoCs

Processes:

InstallUtil.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\Emailer _ Quarterly Tax Returns for April and March 2020.exe
"C:\Users\Admin\AppData\Local\Temp\Emailer _ Quarterly Tax Returns for April and March 2020.exe"
1⤵
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2468

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
"C:\Windows\\\\Microsoft.NET\\\\Framework\\\\v4.0.30319\\\\InstallUtil.exe"
2⤵
PID:2400

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
"C:\Windows\\\\Microsoft.NET\\\\Framework\\\\v4.0.30319\\\\InstallUtil.exe"
2⤵
- Loads dropped DLL
- Accesses Microsoft Outlook profiles
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:4324

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Costura\8E3603ED8A0381E02887C1DBBE921340\32\sqlite.interop.dll
Filesize
594KB

MD5
e81aeac387c5db32b7f9b07d15e788e0

SHA1
829be6eaf1cb0d82b2ddfc98272e1087f4a7a7c3

SHA256
44f31f99f048bfc5195937353b5207332e455bcd5a722bcfd32cacfd93f60f06

SHA512
cc6a96325a01c50c059706a1f4156f109e502ef9c0b0f5de209d1f52e7cc973cebc027f57ed988e9d1b8fca62746b60ee7430d608de95cdd0e5ac3cb61fbe32e

Download Submit
memory/2468-130-0x0000000000780000-0x00000000009C8000-memory.dmp

Filesize
2.3MB

Download
memory/2468-131-0x0000000005F70000-0x0000000006514000-memory.dmp

Filesize
5.6MB

Download
memory/2468-133-0x00000000059C0000-0x0000000005F64000-memory.dmp

Filesize
5.6MB

Download
memory/4324-132-0x0000000000000000-mapping.dmp

Download
memory/4324-134-0x0000000000400000-0x000000000055E000-memory.dmp

Filesize
1.4MB

Download
memory/4324-136-0x0000000005C30000-0x0000000005CC2000-memory.dmp

Filesize
584KB

Download
memory/4324-137-0x00000000065F0000-0x0000000006656000-memory.dmp

Filesize
408KB

Download
memory/4324-138-0x0000000006C90000-0x0000000006C9A000-memory.dmp

Filesize
40KB

Download
memory/4324-139-0x0000000008770000-0x00000000087C0000-memory.dmp

Filesize
320KB

Download
memory/4324-140-0x0000000007CB0000-0x0000000007D4C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads