masslogger | affd41df487700a59f27d10e8a52a4fe7f10907f7bbf3f11d1e8b26e8435384d

General

Target

SKBMT__B.exe
Size

807KB
MD5

848160f98c9f8649b24e626a9b2b771c
SHA1

0f9b15af9c94d497979efc1ad64e81ce89a8ed76
SHA256

4e232298aee519176835a2da80f0a04ac027ac235a5b5ea51974c66318b59245
SHA512

235f7516b632632a79994cc7d35a725a141d88f301d63c40d4c68ed225075769e2aae6f2d5671c638c002d1ad136e718534517e17d4a206391e40e63610db242

Score

10^/10

masslogger 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 2:31:10 PM MassLogger Started: 5/21/2022 2:30:59 PM Interval: 96 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\SKBMT__B.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 32 IoCs

Processes:

resource	yara_rule
behavioral1/memory/660-61-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-62-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-63-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-64-0x00000000004ABEAE-mapping.dmp	family_masslogger
behavioral1/memory/660-66-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-68-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-70-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-72-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-74-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-76-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-78-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-80-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-82-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-84-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-86-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-88-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-90-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-92-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-94-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-96-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-98-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-100-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-102-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-104-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-108-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-106-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-110-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-112-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-114-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-116-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-118-0x0000000000400000-0x00000000004B0000-memory.dmp	family_masslogger
behavioral1/memory/660-120-0x0000000000400000-0x00000000004B0000-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/964-57-0x0000000005D60000-0x0000000005E18000-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:

SKBMT__B.exe

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

SKBMT__B.exe

description pid process target process

PID 964 set thread context of 660 964 SKBMT__B.exe SKBMT__B.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

SKBMT__B.exe

pid process

660 SKBMT__B.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

SKBMT__B.exe

description pid process

Token: SeDebugPrivilege 660 SKBMT__B.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 964 set thread context of 660	964	SKBMT__B.exe	SKBMT__B.exe

pid	process
660	SKBMT__B.exe

description	pid	process
Token: SeDebugPrivilege	660	SKBMT__B.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

SKBMT__B.exe

description	pid	process	target process
PID 964 wrote to memory of 660	964	SKBMT__B.exe	SKBMT__B.exe
PID 964 wrote to memory of 660	964	SKBMT__B.exe	SKBMT__B.exe
PID 964 wrote to memory of 660	964	SKBMT__B.exe	SKBMT__B.exe
PID 964 wrote to memory of 660	964	SKBMT__B.exe	SKBMT__B.exe
PID 964 wrote to memory of 660	964	SKBMT__B.exe	SKBMT__B.exe
PID 964 wrote to memory of 660	964	SKBMT__B.exe	SKBMT__B.exe
PID 964 wrote to memory of 660	964	SKBMT__B.exe	SKBMT__B.exe
PID 964 wrote to memory of 660	964	SKBMT__B.exe	SKBMT__B.exe
PID 964 wrote to memory of 660	964	SKBMT__B.exe	SKBMT__B.exe

C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe
"C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:964

C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe
"C:\Users\Admin\AppData\Local\Temp\SKBMT__B.exe"
2⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:660

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/660-86-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-114-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-579-0x00000000045A5000-0x00000000045B6000-memory.dmp

Filesize
68KB

Download
memory/660-577-0x0000000000840000-0x0000000000884000-memory.dmp

Filesize
272KB

Download
memory/660-58-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-59-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-82-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-62-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-63-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-64-0x00000000004ABEAE-mapping.dmp

Download
memory/660-66-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-68-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-70-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-72-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-74-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-76-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-78-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-120-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-61-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-118-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-80-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-88-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-90-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-92-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-94-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-96-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-98-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-100-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-102-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-104-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-108-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-106-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-110-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-112-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-84-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/660-116-0x0000000000400000-0x00000000004B0000-memory.dmp

Filesize
704KB

Download
memory/964-55-0x00000000751C1000-0x00000000751C3000-memory.dmp

Filesize
8KB

Download
memory/964-54-0x00000000009A0000-0x0000000000A70000-memory.dmp

Filesize
832KB

Download
memory/964-57-0x0000000005D60000-0x0000000005E18000-memory.dmp

Filesize
736KB

Download
memory/964-56-0x00000000003D0000-0x00000000003D8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads