masslogger | 8f454599de85acba90becf21df70d90ee0c760b58f7fb86b12a5d29d98efc62b

General

Target

P.O250520.exe
Size

815KB
MD5

aa5fb011e59d1e2a8bef56360a4f31b4
SHA1

5c80c907e0792bdf8d6d4a48ebcbb3493570b78b
SHA256

5c826e35fe48ce5410e9c553242a83e71b2408a57d3256bcd0bd4334412010b0
SHA512

f2ca54693c8a00ed447f026d309a2654c05a448f1b4d435b6d7d719d9f1798c687cc3e307a3ec53f9d1fea73e448cae91b16ccf31b59b2f17bd7bd44a46f681d

Score

10^/10

masslogger coreentity ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\8506BBE7FF\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.3.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.13 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 2:50:19 PM MassLogger Started: 5/21/2022 2:50:08 PM Interval: 2 hour MassLogger Process: C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe As Administrator: True

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/1308-56-0x00000000003C0000-0x00000000003C8000-memory.dmp	coreentity

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/972-61-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-62-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-64-0x00000000004A1A2E-mapping.dmp	family_masslogger
behavioral1/memory/972-63-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-66-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-68-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-70-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-72-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-74-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-76-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-78-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-80-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-82-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-84-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-86-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-88-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-90-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-92-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-94-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-96-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-98-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-100-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-102-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-104-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-106-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-108-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-110-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-112-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-114-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-116-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-118-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/972-120-0x0000000000400000-0x00000000004A6000-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/1308-57-0x0000000006050000-0x00000000060FE000-memory.dmp	rezer0

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:

P.O250520.exe

description pid process target process

PID 1308 set thread context of 972 1308 P.O250520.exe RegSvcs.exe
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

808 972 WerFault.exe RegSvcs.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

RegSvcs.exe

pid process

972 RegSvcs.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

P.O250520.exeRegSvcs.exe

pid process

1308 P.O250520.exe
1308 P.O250520.exe
1308 P.O250520.exe
972 RegSvcs.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

P.O250520.exeRegSvcs.exe

description pid process

Token: SeDebugPrivilege 1308 P.O250520.exe
Token: SeDebugPrivilege 972 RegSvcs.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegSvcs.exe

pid process

972 RegSvcs.exe

flow	ioc
3	api.ipify.org

description	pid	process	target process
PID 1308 set thread context of 972	1308	P.O250520.exe	RegSvcs.exe

pid	pid_target	process	target process
808	972	WerFault.exe	RegSvcs.exe

pid	process
972	RegSvcs.exe

pid	process
1308	P.O250520.exe
1308	P.O250520.exe
1308	P.O250520.exe
972	RegSvcs.exe

description	pid	process
Token: SeDebugPrivilege	1308	P.O250520.exe
Token: SeDebugPrivilege	972	RegSvcs.exe

pid	process
972	RegSvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

P.O250520.exeRegSvcs.exe

description	pid	process	target process
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 1308 wrote to memory of 972	1308	P.O250520.exe	RegSvcs.exe
PID 972 wrote to memory of 808	972	RegSvcs.exe	WerFault.exe
PID 972 wrote to memory of 808	972	RegSvcs.exe	WerFault.exe
PID 972 wrote to memory of 808	972	RegSvcs.exe	WerFault.exe
PID 972 wrote to memory of 808	972	RegSvcs.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\P.O250520.exe
"C:\Users\Admin\AppData\Local\Temp\P.O250520.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1308

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
2⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:972

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 972 -s 1360
3⤵
- Program crash
PID:808

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

memory/808-576-0x0000000000000000-mapping.dmp

Download
memory/972-82-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-120-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-86-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-58-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-59-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-61-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-62-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-64-0x00000000004A1A2E-mapping.dmp

Download
memory/972-84-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-66-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-68-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-70-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-72-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-74-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-76-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-78-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-80-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-118-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-63-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-116-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-98-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-90-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-92-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-94-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-96-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-88-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-100-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-102-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-104-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-106-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-108-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-110-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-112-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/972-114-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/1308-56-0x00000000003C0000-0x00000000003C8000-memory.dmp

Filesize
32KB

Download
memory/1308-54-0x0000000000E10000-0x0000000000EE2000-memory.dmp

Filesize
840KB

Download
memory/1308-57-0x0000000006050000-0x00000000060FE000-memory.dmp

Filesize
696KB

Download
memory/1308-55-0x0000000075261000-0x0000000075263000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix

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Downloads