masslogger | 050c2d432568b83f75b1203ecea8e2a305408bc4e296161edc1ec8f381a0241f

Analysis

max time kernel
83s
max time network
74s
platform
windows7_x64
resource
win7-20220414-en
submitted
21-05-2022 12:30

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General

Target

REQUEST_.scr
Size

858KB
MD5

ee07a20a60dd6c53958568469f4e6bec
SHA1

966cbcfcb101e2d6a70b940de20376ba2f6d7164
SHA256

8b701ead5af587161656419272dfa0fca1087ce8f5603ad1e6f70332f9a1fb04
SHA512

668c2d5a98fcca6fb18d599a17415100a2153fe06130532308012b5f4e12afbe08e6bc0f8dac249fac0f85d299800032a7971176eebf7a44ffcb74216c835bfa

Score

10^/10

masslogger ransomware rezer0 spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\3B8E3C2477\Log.txt

Family

masslogger

Ransom Note

################################################################# MassLogger v1.3.4.0 ################################################################# ### Logger Details ### User Name: Admin IP: 127.0.0.1 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 3:11:23 PM MassLogger Started: 5/21/2022 3:10:56 PM Interval: 5 hour MassLogger Process: C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.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 log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

ReZer0 packer 1 IoCs

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

rezer0

resource	yara_rule
behavioral1/memory/1304-57-0x0000000005AF0000-0x0000000005BA0000-memory.dmp	rezer0

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
5	api.ipify.org
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1304 set thread context of 2044	1304	REQUEST_.scr	30

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

pid	Process
1412	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2044	RegSvcs.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2044	RegSvcs.exe
2044	RegSvcs.exe
1632	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2044	RegSvcs.exe
Token: SeDebugPrivilege	1632	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2044	RegSvcs.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1304 wrote to memory of 1412	1304	REQUEST_.scr	28
PID 1304 wrote to memory of 1412	1304	REQUEST_.scr	28
PID 1304 wrote to memory of 1412	1304	REQUEST_.scr	28
PID 1304 wrote to memory of 1412	1304	REQUEST_.scr	28
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 1304 wrote to memory of 2044	1304	REQUEST_.scr	30
PID 2044 wrote to memory of 704	2044	RegSvcs.exe	32
PID 2044 wrote to memory of 704	2044	RegSvcs.exe	32
PID 2044 wrote to memory of 704	2044	RegSvcs.exe	32
PID 2044 wrote to memory of 704	2044	RegSvcs.exe	32
PID 704 wrote to memory of 1632	704	cmd.exe	34
PID 704 wrote to memory of 1632	704	cmd.exe	34
PID 704 wrote to memory of 1632	704	cmd.exe	34
PID 704 wrote to memory of 1632	704	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\REQUEST_.scr
"C:\Users\Admin\AppData\Local\Temp\REQUEST_.scr" /S
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1304
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\jXeioFCt" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8A56.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1412
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
  2⤵
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2044
- - C:\Windows\SysWOW64\cmd.exe
    "cmd" /c start /b powershell Add-MpPreference -ExclusionPath 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe' & exit
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:704
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      powershell Add-MpPreference -ExclusionPath 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe'
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1632

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

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8A56.tmp

Filesize
1KB

MD5
f52ba046688fa778456cc2ce8be4be7a

SHA1
db71139e2212ba196ce0db69ac0815dca7fc778b

SHA256
3593275960a5112861d9922e9a4324cbc3c59bd6795ec6a07291c0e63725c093

SHA512
623da5cb7c96bc570f6b223242c054c1bdbeddeec38bb7f951ee7270dac6ecc1084f5de68f9720b0232e6fc5daf855cd8733d3788b166b355f4e6c914b6404a6

Download Submit
memory/1304-54-0x00000000013E0000-0x00000000014BC000-memory.dmp

Filesize
880KB

Download
memory/1304-55-0x0000000076451000-0x0000000076453000-memory.dmp

Filesize
8KB

Download
memory/1304-56-0x0000000000500000-0x0000000000508000-memory.dmp

Filesize
32KB

Download
memory/1304-57-0x0000000005AF0000-0x0000000005BA0000-memory.dmp

Filesize
704KB

Download
memory/1632-584-0x000000006F4C0000-0x000000006FA6B000-memory.dmp

Filesize
5.7MB

Download
memory/2044-90-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-96-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-68-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-70-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-72-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-74-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-76-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-78-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-80-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-82-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-84-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-88-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-64-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-86-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-92-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-94-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-65-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-98-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-100-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-102-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-104-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-106-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-108-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-110-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-112-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-114-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-116-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-118-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-120-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-122-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-63-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-61-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download
memory/2044-583-0x0000000004BC5000-0x0000000004BD6000-memory.dmp

Filesize
68KB

Download
memory/2044-60-0x0000000000400000-0x00000000004A8000-memory.dmp

Filesize
672KB

Download