masslogger | 85216c53e9590919930a55a1040fd4a67f4ff5440f12022c736baab95284a3bb

General

Target

INVOICE09809000.exe
Size

919KB
MD5

f580ef1e3aea53f11f733293d5dea0c8
SHA1

31210d185fe5da5d221fe6e77ea8057a9b3d91f1
SHA256

d1befdea5b845b2f44b7b2202bdf3d9e09a26fda3287581db28af324c865cdec
SHA512

cc4d96d43498dbfe915fe67d9cb25308a4a08e8d3360b7649dfc800d146111597c3f852fe1d3e29b605b4e4082759d8a83ef7231e686a01e49f59b6569605150

Score

10^/10

masslogger coreentity ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\AEF946DCB4\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.4.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.50 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 5:58:11 AM MassLogger Started: 5/21/2022 5:57:56 AM Interval: 1 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\INVOICE09809000.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

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/2044-56-0x0000000000720000-0x0000000000728000-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/2044-57-0x0000000005CA0000-0x0000000005D50000-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:

INVOICE09809000.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation	INVOICE09809000.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

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

Processes:

INVOICE09809000.exe

description pid process target process

PID 2044 set thread context of 856 2044 INVOICE09809000.exe INVOICE09809000.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

1552 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

INVOICE09809000.exe

pid process

856 INVOICE09809000.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

INVOICE09809000.exe

description pid process

Token: SeDebugPrivilege 856 INVOICE09809000.exe

flow	ioc
3	api.ipify.org

description	pid	process	target process
PID 2044 set thread context of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe

pid	process
1552	schtasks.exe

pid	process
856	INVOICE09809000.exe

description	pid	process
Token: SeDebugPrivilege	856	INVOICE09809000.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

INVOICE09809000.exe

description	pid	process	target process
PID 2044 wrote to memory of 1552	2044	INVOICE09809000.exe	schtasks.exe
PID 2044 wrote to memory of 1552	2044	INVOICE09809000.exe	schtasks.exe
PID 2044 wrote to memory of 1552	2044	INVOICE09809000.exe	schtasks.exe
PID 2044 wrote to memory of 1552	2044	INVOICE09809000.exe	schtasks.exe
PID 2044 wrote to memory of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe
PID 2044 wrote to memory of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe
PID 2044 wrote to memory of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe
PID 2044 wrote to memory of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe
PID 2044 wrote to memory of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe
PID 2044 wrote to memory of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe
PID 2044 wrote to memory of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe
PID 2044 wrote to memory of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe
PID 2044 wrote to memory of 856	2044	INVOICE09809000.exe	INVOICE09809000.exe

C:\Users\Admin\AppData\Local\Temp\INVOICE09809000.exe
"C:\Users\Admin\AppData\Local\Temp\INVOICE09809000.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2044

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QynTIVAvGbD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp26C3.tmp"
2⤵
- Creates scheduled task(s)
PID:1552

C:\Users\Admin\AppData\Local\Temp\INVOICE09809000.exe
"{path}"
2⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:856

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

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp26C3.tmp
Filesize
1KB

MD5
9a0e7dadd95596a5e0d55efc770c6c84

SHA1
f03549a5c46eea692ad386103ab525c33b1e85d5

SHA256
38701505a52219b39c35b89f50d16f7b49713133b9731d6d406e63aa7146bbda

SHA512
3cfd18ea42a1b605203166e05c4d6cb396409ca354c37eebe17974b1aecec571f4a8c4a4de3bc133c0fd18aee5e023cf99375bafd519da16b63ff9b9b72fec13

Download Submit
memory/856-84-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-581-0x0000000000750000-0x0000000000794000-memory.dmp

Filesize
272KB

Download
memory/856-86-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-580-0x0000000004D55000-0x0000000004D66000-memory.dmp

Filesize
68KB

Download
memory/856-90-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-88-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-65-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-66-0x00000000004A2DAE-mapping.dmp

Download
memory/856-68-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-70-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-72-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-74-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-76-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-78-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-80-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-82-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-122-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-120-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-118-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-92-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-94-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-96-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-98-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-100-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-102-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-104-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-106-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-108-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-110-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-112-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-114-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/856-116-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/1552-58-0x0000000000000000-mapping.dmp

Download
memory/2044-56-0x0000000000720000-0x0000000000728000-memory.dmp

Filesize
32KB

Download
memory/2044-54-0x0000000000A70000-0x0000000000B5C000-memory.dmp

Filesize
944KB

Download
memory/2044-55-0x0000000075841000-0x0000000075843000-memory.dmp

Filesize
8KB

Download
memory/2044-57-0x0000000005CA0000-0x0000000005D50000-memory.dmp

Filesize
704KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads