masslogger | 114f6ec5f4bf961c2cefd0640c19bf6c7efb1e59f6a58b289fe098e4db0074c0

Analysis

max time kernel
84s
max time network
130s
platform
windows7_x64
resource
win7-20220414-en
submitted
21-05-2022 03:28

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General

Target

HCtR5cTfBBvX0Tt.exe
Size

956KB
MD5

946617f29b6f4d728a590d6eaae36126
SHA1

d06818f1f24d85e26d7159845076f346564253a0
SHA256

45ef1e51df38e6778aaf2cd726748b55459b4aa54a2c8c2fea445cab0885f7bc
SHA512

7204f1163662f391fe09c2637ca9c2e07e08bc1c047fab4e1594c49a37fb222093d86298c267cec9ee27f842f538f480c2bb8078ffea59c501f4777ff50a7d2f

Score

10^/10

masslogger collection coreentity ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

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

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.5.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.51 Location: United States OS: Microsoft Windows 7 Ultimate 64bit CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 5:08:28 AM MassLogger Started: 5/21/2022 5:08:17 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\HCtR5cTfBBvX0Tt.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Extracted

Credentials

Protocol: smtp
Host:
mail.privateemail.com
Port:
587
Username:
[email protected]
Password:
@willsmith1.,

Signatures

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

Processes:

resource	yara_rule
behavioral1/memory/1644-57-0x00000000004E0000-0x00000000004E8000-memory.dmp	coreentity

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

ReZer0 packer 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1644-58-0x0000000005E30000-0x0000000005EE8000-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:

HCtR5cTfBBvX0Tt.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Control Panel\International\Geo\Nation	HCtR5cTfBBvX0Tt.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:

HCtR5cTfBBvX0Tt.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	HCtR5cTfBBvX0Tt.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	HCtR5cTfBBvX0Tt.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	HCtR5cTfBBvX0Tt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	HCtR5cTfBBvX0Tt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	HCtR5cTfBBvX0Tt.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	HCtR5cTfBBvX0Tt.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	HCtR5cTfBBvX0Tt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	HCtR5cTfBBvX0Tt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	HCtR5cTfBBvX0Tt.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	HCtR5cTfBBvX0Tt.exe
Key created	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	HCtR5cTfBBvX0Tt.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	HCtR5cTfBBvX0Tt.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	HCtR5cTfBBvX0Tt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	HCtR5cTfBBvX0Tt.exe
Key queried	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	HCtR5cTfBBvX0Tt.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:

HCtR5cTfBBvX0Tt.exe

description pid process target process

PID 1644 set thread context of 844 1644 HCtR5cTfBBvX0Tt.exe HCtR5cTfBBvX0Tt.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

1064 schtasks.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

HCtR5cTfBBvX0Tt.exe

pid process

844 HCtR5cTfBBvX0Tt.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

HCtR5cTfBBvX0Tt.exe

pid process

844 HCtR5cTfBBvX0Tt.exe
844 HCtR5cTfBBvX0Tt.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

HCtR5cTfBBvX0Tt.exeHCtR5cTfBBvX0Tt.exe

description pid process

Token: SeDebugPrivilege 1644 HCtR5cTfBBvX0Tt.exe
Token: SeDebugPrivilege 844 HCtR5cTfBBvX0Tt.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

HCtR5cTfBBvX0Tt.exe

pid process

844 HCtR5cTfBBvX0Tt.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 1644 set thread context of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe

pid	process
1064	schtasks.exe

pid	process
844	HCtR5cTfBBvX0Tt.exe

pid	process
844	HCtR5cTfBBvX0Tt.exe
844	HCtR5cTfBBvX0Tt.exe

description	pid	process
Token: SeDebugPrivilege	1644	HCtR5cTfBBvX0Tt.exe
Token: SeDebugPrivilege	844	HCtR5cTfBBvX0Tt.exe

pid	process
844	HCtR5cTfBBvX0Tt.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

HCtR5cTfBBvX0Tt.exe

description	pid	process	target process
PID 1644 wrote to memory of 1064	1644	HCtR5cTfBBvX0Tt.exe	schtasks.exe
PID 1644 wrote to memory of 1064	1644	HCtR5cTfBBvX0Tt.exe	schtasks.exe
PID 1644 wrote to memory of 1064	1644	HCtR5cTfBBvX0Tt.exe	schtasks.exe
PID 1644 wrote to memory of 1064	1644	HCtR5cTfBBvX0Tt.exe	schtasks.exe
PID 1644 wrote to memory of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe
PID 1644 wrote to memory of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe
PID 1644 wrote to memory of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe
PID 1644 wrote to memory of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe
PID 1644 wrote to memory of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe
PID 1644 wrote to memory of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe
PID 1644 wrote to memory of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe
PID 1644 wrote to memory of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe
PID 1644 wrote to memory of 844	1644	HCtR5cTfBBvX0Tt.exe	HCtR5cTfBBvX0Tt.exe

outlook_office_path 1 IoCs

Processes:

HCtR5cTfBBvX0Tt.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	HCtR5cTfBBvX0Tt.exe

outlook_win_path 1 IoCs

Processes:

HCtR5cTfBBvX0Tt.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	HCtR5cTfBBvX0Tt.exe

C:\Users\Admin\AppData\Local\Temp\HCtR5cTfBBvX0Tt.exe
"C:\Users\Admin\AppData\Local\Temp\HCtR5cTfBBvX0Tt.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1644
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AvKneptmDajjT" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB9A0.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1064
- C:\Users\Admin\AppData\Local\Temp\HCtR5cTfBBvX0Tt.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:844

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB9A0.tmp

Filesize
1KB

MD5
b2336f50de47446f830fd67d5313a0ec

SHA1
ec2ef40bcf9a2dcf33b627b1416d288429559b82

SHA256
68773bf984a5f20858101c30b61bc82567ca5c4e38e8823d5baea133006e6fb6

SHA512
dc0d6537b8803695bee4aeb04fc3ce331a4ce721e940c6b27bcb3b29026134754de9ebe5a99d641357d93e1048a69fdfd365bf15fb40c8cf5ec1e6370767f730

Download Submit
memory/844-87-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-107-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-585-0x0000000004810000-0x0000000004824000-memory.dmp

Filesize
80KB

Download
memory/844-85-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-582-0x00000000008B0000-0x00000000008F4000-memory.dmp

Filesize
272KB

Download
memory/844-123-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-61-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-62-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-64-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-65-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-66-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-67-0x00000000004ABB2E-mapping.dmp

Download
memory/844-69-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-71-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-73-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-89-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-77-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-79-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-83-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-81-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-584-0x0000000004D65000-0x0000000004D76000-memory.dmp

Filesize
68KB

Download
memory/844-121-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-75-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-91-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-93-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-95-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-97-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-99-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-101-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-103-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-105-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-119-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-109-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-111-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-113-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-115-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/844-117-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/1064-59-0x0000000000000000-mapping.dmp

Download
memory/1644-56-0x0000000076781000-0x0000000076783000-memory.dmp

Filesize
8KB

Download
memory/1644-58-0x0000000005E30000-0x0000000005EE8000-memory.dmp

Filesize
736KB

Download
memory/1644-55-0x0000000000600000-0x00000000006CA000-memory.dmp

Filesize
808KB

Download
memory/1644-54-0x0000000000050000-0x0000000000148000-memory.dmp

Filesize
992KB

Download
memory/1644-57-0x00000000004E0000-0x00000000004E8000-memory.dmp

Filesize
32KB

Download