masslogger | c6117524f5e25ef7de2eaa1e4693be4f0ebdc1548b3a8b170f96c4b1aeeb57c2

General

Target
ekstre.exe
Size 1.2MB
Sample200717-wm4qbllxes
SHA256 c6117524f5e25ef7de2eaa1e4693be4f0ebdc1548b3a8b170f96c4b1aeeb57c2
MD5 938dcd65814e49ccb1a8cfa5100923f7
SHA1 31b2fa63b6d1ed18267eba342e37f41830ac9337
SHA512 9337a6dbe2789a7639e7ba942115e357ecec430af9935d9df469ae0f7c24ba508fe23c0cac4111d5968f31f0a2b9d1c9867e3a512ecaddaddc255c496acb2a25
MD5 SHA1 SHA512

Score

10^/10

ransomware spyware stealer masslogger persistence

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\E2C1E8F1FA\Log.txt

masslogger

Ransom Note

<|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 7 Professional 64bit Windows Serial Key: HYF8J-CVRMY-CM74G-RPHKF-PW487 CPU: Persocon Processor 2.5+ GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 7/17/2020 4:37:08 PM MassLogger Started: 7/17/2020 4:37:02 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\RegAsm.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> Disabled <|| Downloader ||> Disabled <|| Bot Killer ||> Disabled <|| Window Searcher ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> Disabled

Signatures

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1448	ekstre.exe
1448	ekstre.exe
1448	ekstre.exe
1896	.exe
1896	.exe
1896	.exe
2044	RegAsm.exe

Loads dropped DLL 3 IoCs

pid	Process
1448	ekstre.exe
1896	.exe
2044	RegAsm.exe

Executes dropped EXE 2 IoCs

pid	Process
1896	.exe
2044	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1896 set thread context of 2044	1896	.exe	31

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

Looks up external IP address via web service 1 IoCs

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

flow	ioc
6	api.ipify.org

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\admin = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\Desktop\\.exe"	reg.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1448	ekstre.exe
Token: SeDebugPrivilege	1896	.exe
Token: SeDebugPrivilege	2044	RegAsm.exe

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1448 wrote to memory of 1120	1448	ekstre.exe	24
PID 1448 wrote to memory of 1120	1448	ekstre.exe	24
PID 1448 wrote to memory of 1120	1448	ekstre.exe	24
PID 1448 wrote to memory of 1120	1448	ekstre.exe	24
PID 1120 wrote to memory of 1524	1120	cmd.exe	26
PID 1120 wrote to memory of 1524	1120	cmd.exe	26
PID 1120 wrote to memory of 1524	1120	cmd.exe	26
PID 1120 wrote to memory of 1524	1120	cmd.exe	26
PID 1448 wrote to memory of 1896	1448	ekstre.exe	28
PID 1448 wrote to memory of 1896	1448	ekstre.exe	28
PID 1448 wrote to memory of 1896	1448	ekstre.exe	28
PID 1448 wrote to memory of 1896	1448	ekstre.exe	28
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31
PID 1896 wrote to memory of 2044	1896	.exe	31

C:\Users\Admin\AppData\Local\Temp\ekstre.exe
"C:\Users\Admin\AppData\Local\Temp\ekstre.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1448
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v admin /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1120
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v admin /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\Desktop\.exe"
    3⤵
    - Adds Run key to start application
    PID:1524
- C:\Users\Admin\Desktop\.exe
  "C:\Users\Admin\Desktop\.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Loads dropped DLL
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1896
- - C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Loads dropped DLL
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2044

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2044-14-0x0000000000400000-0x000000000049A000-memory.dmp

Download

memory/2044-17-0x0000000000400000-0x000000000049A000-memory.dmp

Download

memory/2044-18-0x0000000000400000-0x000000000049A000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads