masslogger | 79690d4fb9d6c28644bb6ffaf431fb985b626ab681c857397e54c05ff221b46d

General

Target

[C38226] #TD JMMasuda_Mfg.exe
Size

817KB
MD5

6ca7ca71e6777e838bb32c911e5e68eb
SHA1

a3c11cc089fd8f5db0d673d9f4f63d495ee3cffe
SHA256

fbc70395ea55477b8827145c12f85133565b1be20e31f71327ea17d2706127be
SHA512

c772675fe56dc2d95bdf7ff59c0a0ea81f0743f074cb5c7e9c29fc78e8f9eb19eb023d9b0a2bf2f9aadef2250dba78667a454db46275c7a9a91a800180ccef58

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 v1.3.2.0 ################################################################# ### 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 6:04:01 AM MassLogger Started: 5/21/2022 6:03:34 AM Interval: 6 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/2016-56-0x00000000004F0000-0x00000000004F8000-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/2000-63-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-64-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-65-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-66-0x00000000004A1CBE-mapping.dmp	family_masslogger
behavioral1/memory/2000-68-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-70-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-72-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-74-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-76-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-78-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-80-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-82-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-84-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-86-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-88-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-90-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-92-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-94-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-96-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-98-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-100-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-102-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-104-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-106-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-108-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-110-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-112-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-114-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-116-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-118-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-120-0x0000000000400000-0x00000000004A6000-memory.dmp	family_masslogger
behavioral1/memory/2000-122-0x0000000000400000-0x00000000004A6000-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/2016-57-0x0000000005D60000-0x0000000005E0E000-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

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

Processes:

[C38226] #TD JMMasuda_Mfg.exe

description pid process target process

PID 2016 set thread context of 2000 2016 [C38226] #TD JMMasuda_Mfg.exe RegSvcs.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1700 2000 WerFault.exe RegSvcs.exe
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

1752 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

[C38226] #TD JMMasuda_Mfg.exeRegSvcs.exe

description pid process

Token: SeDebugPrivilege 2016 [C38226] #TD JMMasuda_Mfg.exe
Token: SeDebugPrivilege 2000 RegSvcs.exe

flow	ioc
4	api.ipify.org

description	pid	process	target process
PID 2016 set thread context of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe

pid	pid_target	process	target process
1700	2000	WerFault.exe	RegSvcs.exe

pid	process
1752	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2016	[C38226] #TD JMMasuda_Mfg.exe
Token: SeDebugPrivilege	2000	RegSvcs.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

[C38226] #TD JMMasuda_Mfg.exeRegSvcs.exe

description	pid	process	target process
PID 2016 wrote to memory of 1752	2016	[C38226] #TD JMMasuda_Mfg.exe	schtasks.exe
PID 2016 wrote to memory of 1752	2016	[C38226] #TD JMMasuda_Mfg.exe	schtasks.exe
PID 2016 wrote to memory of 1752	2016	[C38226] #TD JMMasuda_Mfg.exe	schtasks.exe
PID 2016 wrote to memory of 1752	2016	[C38226] #TD JMMasuda_Mfg.exe	schtasks.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2016 wrote to memory of 2000	2016	[C38226] #TD JMMasuda_Mfg.exe	RegSvcs.exe
PID 2000 wrote to memory of 1700	2000	RegSvcs.exe	WerFault.exe
PID 2000 wrote to memory of 1700	2000	RegSvcs.exe	WerFault.exe
PID 2000 wrote to memory of 1700	2000	RegSvcs.exe	WerFault.exe
PID 2000 wrote to memory of 1700	2000	RegSvcs.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\[C38226] #TD JMMasuda_Mfg.exe
"C:\Users\Admin\AppData\Local\Temp\[C38226] #TD JMMasuda_Mfg.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2016

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\CIbVwu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5439.tmp"
2⤵
- Creates scheduled task(s)
PID:1752

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2000

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2000 -s 1300
3⤵
- Program crash
PID:1700

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp5439.tmp
Filesize
1KB

MD5
fe02e3e13abc46e2e96f0f4adf80b8cf

SHA1
c34c3f26589423074e6708d80619f2d15ef06e71

SHA256
142b2d4e3addec12f5652d1d4d753bc3e4a851f3064a3b615691ea943ba898ac

SHA512
bbd44be01e5e9cc0cab0d343747ed5c9666aaff9d6027719c3110cc26398c54d758e50c3a2eecbf475c631dbafaf626b4f76aa42f85a60ffbdbe591203a01e28

Download Submit
memory/1700-572-0x0000000000000000-mapping.dmp

Download
memory/1752-58-0x0000000000000000-mapping.dmp

Download
memory/2000-84-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-122-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-88-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-60-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-61-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-63-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-64-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-65-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-86-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-68-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-70-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-72-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-74-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-76-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-78-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-80-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-82-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-120-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-66-0x00000000004A1CBE-mapping.dmp

Download
memory/2000-118-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-100-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-92-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-94-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-96-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-98-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-90-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-102-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-104-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-106-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-108-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-110-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-112-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-114-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2000-116-0x0000000000400000-0x00000000004A6000-memory.dmp

Filesize
664KB

Download
memory/2016-57-0x0000000005D60000-0x0000000005E0E000-memory.dmp

Filesize
696KB

Download
memory/2016-54-0x0000000000890000-0x0000000000962000-memory.dmp

Filesize
840KB

Download
memory/2016-56-0x00000000004F0000-0x00000000004F8000-memory.dmp

Filesize
32KB

Download
memory/2016-55-0x0000000075F21000-0x0000000075F23000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads