masslogger | b2ad224e14768937724111bc6367030c09ea540476364fa052a64701a2c940a9

General

Target

Proforma Invoice.exe
Size

1.0MB
MD5

a009bf5f0bc5b29b3c7f70203584c20c
SHA1

1f95f553fb11d4d6f6b7a6a15a3ed19aba8403ba
SHA256

8c3156c901bae62d20fce1aa07a4c0e0252ac6ab6443877396a37f83441f2b65
SHA512

4185e273e76f21c4521f243d6f7aab693996269e4937053c053bba3ac2f83dcf0039b02ff7da23ae2648bc906e96e18f2f82e21a58956268518d4b1fd688b9bd

Score

10^/10

masslogger collection ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\79FE0CC911\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.6.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 7 Ultimate 64bit Windows Serial Key: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 3:29:29 AM MassLogger Started: 5/21/2022 3:29:18 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Proforma Invoice.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Signatures

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

MassLogger Main Payload 33 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1104-63-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-64-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-65-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-66-0x00000000004AC90E-mapping.dmp	family_masslogger
behavioral1/memory/1104-68-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-70-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-72-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-74-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-76-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-78-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-80-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-82-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-84-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-86-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-88-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-90-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-92-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-94-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-96-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-98-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-100-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-102-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-104-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-106-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-108-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-110-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-112-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-114-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-116-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-118-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-120-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-122-0x0000000000400000-0x00000000004B2000-memory.dmp	family_masslogger
behavioral1/memory/1104-589-0x00000000009E0000-0x0000000000A20000-memory.dmp	family_masslogger

MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.

Processes:

yara_rule

masslogger_log_file

yara_rule
masslogger_log_file

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1672-57-0x0000000005210000-0x00000000052C8000-memory.dmp	rezer0

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:

Proforma Invoice.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	Proforma Invoice.exe

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
T1081

Accesses Microsoft Outlook profiles 1 TTPs 15 IoCs

collection

Email Collection

T1114

Processes:

Proforma Invoice.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Proforma Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Proforma Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Proforma Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	Proforma Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	Proforma Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	Proforma Invoice.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.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

4 api.ipify.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

Proforma Invoice.exe

description pid process target process

PID 1672 set thread context of 1104 1672 Proforma Invoice.exe Proforma Invoice.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1932 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

Proforma Invoice.exe

pid process

1104 Proforma Invoice.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Proforma Invoice.exe

pid process

1104 Proforma Invoice.exe
1104 Proforma Invoice.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Proforma Invoice.exe

description pid process

Token: SeDebugPrivilege 1104 Proforma Invoice.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Proforma Invoice.exe

pid process

1104 Proforma Invoice.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 1672 set thread context of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe

pid	process
1932	schtasks.exe

pid	process
1104	Proforma Invoice.exe

pid	process
1104	Proforma Invoice.exe
1104	Proforma Invoice.exe

description	pid	process
Token: SeDebugPrivilege	1104	Proforma Invoice.exe

pid	process
1104	Proforma Invoice.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Proforma Invoice.exe

description	pid	process	target process
PID 1672 wrote to memory of 1932	1672	Proforma Invoice.exe	schtasks.exe
PID 1672 wrote to memory of 1932	1672	Proforma Invoice.exe	schtasks.exe
PID 1672 wrote to memory of 1932	1672	Proforma Invoice.exe	schtasks.exe
PID 1672 wrote to memory of 1932	1672	Proforma Invoice.exe	schtasks.exe
PID 1672 wrote to memory of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe
PID 1672 wrote to memory of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe
PID 1672 wrote to memory of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe
PID 1672 wrote to memory of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe
PID 1672 wrote to memory of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe
PID 1672 wrote to memory of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe
PID 1672 wrote to memory of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe
PID 1672 wrote to memory of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe
PID 1672 wrote to memory of 1104	1672	Proforma Invoice.exe	Proforma Invoice.exe

outlook_office_path 1 IoCs

Processes:

Proforma Invoice.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe

outlook_win_path 1 IoCs

Processes:

Proforma Invoice.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Proforma Invoice.exe

C:\Users\Admin\AppData\Local\Temp\Proforma Invoice.exe
"C:\Users\Admin\AppData\Local\Temp\Proforma Invoice.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1672

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\efLaWx" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF94E.tmp"
2⤵
- Creates scheduled task(s)
PID:1932

C:\Users\Admin\AppData\Local\Temp\Proforma Invoice.exe
"{path}"
2⤵
- Checks computer location settings
- 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:1104

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpF94E.tmp
Filesize
1KB

MD5
2ee40d83be8f6dac4cb3ac3dbfcb0fe7

SHA1
e73f24166b4992cdcc7bc729bf9f781aa71b5582

SHA256
a6a71b2f78a861fb360056ee6f8d5b64b9b3493f26df29bb9c600def8991f3ce

SHA512
c9f3ff2068c030897f9913ad9f36fb61aa4e523f4793a065647b713cb39ebc1a76daaeb11312f47e7953a2f6d0fb66ba6995b813be94c5c2904c160a09f0006c

Download Submit
memory/1104-84-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-63-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-589-0x00000000009E0000-0x0000000000A20000-memory.dmp

Filesize
256KB

Download
memory/1104-86-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-587-0x00000000009A0000-0x00000000009E4000-memory.dmp

Filesize
272KB

Download
memory/1104-90-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-61-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-88-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-64-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-65-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-66-0x00000000004AC90E-mapping.dmp

Download
memory/1104-68-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-70-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-72-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-74-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-76-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-78-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-80-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-82-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-122-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-120-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-118-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-60-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-92-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-94-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-96-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-98-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-100-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-102-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-104-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-106-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-108-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-110-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-112-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-114-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1104-116-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1672-56-0x00000000005D0000-0x00000000005E4000-memory.dmp

Filesize
80KB

Download
memory/1672-54-0x0000000001000000-0x000000000110C000-memory.dmp

Filesize
1.0MB

Download
memory/1672-55-0x00000000763C1000-0x00000000763C3000-memory.dmp

Filesize
8KB

Download
memory/1672-57-0x0000000005210000-0x00000000052C8000-memory.dmp

Filesize
736KB

Download
memory/1932-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads