masslogger | f486c5d5fe3c9341cd331a8e6a68102a9bd7a9e7864c5179948c585806828006

General

Target

952110_2020713.exe
Size

1.3MB
MD5

52e2dd01e70bce5aac4f44e19c2876e1
SHA1

bf7326838f7b86565769f1c122bdebbbf5b6a097
SHA256

f486c5d5fe3c9341cd331a8e6a68102a9bd7a9e7864c5179948c585806828006
SHA512

1ab82d5d08de1f877ec4c45d75597f4d584460bf37c6e8e271f6ebc74a452f14b39c84cc22b2bf8a3fadeaa53f87881dcacafeeedfcaf500d34e09a8f659ddbd

Score

10^/10

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
1832	.exe
1984	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1832 set thread context of 1984	1832	.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

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

Adds Run entry 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

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
5	api.ipify.org

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

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	616	952110_2020713.exe
Token: SeDebugPrivilege	1832	.exe
Token: SeDebugPrivilege	1984	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
616	952110_2020713.exe
616	952110_2020713.exe
616	952110_2020713.exe
1832	.exe
1832	.exe
1832	.exe
1984	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 616 wrote to memory of 240	616	952110_2020713.exe	24
PID 616 wrote to memory of 240	616	952110_2020713.exe	24
PID 616 wrote to memory of 240	616	952110_2020713.exe	24
PID 616 wrote to memory of 240	616	952110_2020713.exe	24
PID 240 wrote to memory of 1072	240	cmd.exe	26
PID 240 wrote to memory of 1072	240	cmd.exe	26
PID 240 wrote to memory of 1072	240	cmd.exe	26
PID 240 wrote to memory of 1072	240	cmd.exe	26
PID 616 wrote to memory of 1832	616	952110_2020713.exe	28
PID 616 wrote to memory of 1832	616	952110_2020713.exe	28
PID 616 wrote to memory of 1832	616	952110_2020713.exe	28
PID 616 wrote to memory of 1832	616	952110_2020713.exe	28
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31
PID 1832 wrote to memory of 1984	1832	.exe	31

Loads dropped DLL 3 IoCs

pid	Process
616	952110_2020713.exe
1832	.exe
1984	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\952110_2020713.exe
"C:\Users\Admin\AppData\Local\Temp\952110_2020713.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- Loads dropped DLL
PID:616
- 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:240
- - 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 entry to start application
    PID:1072
- C:\Users\Admin\Desktop\.exe
  "C:\Users\Admin\Desktop\.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  - Loads dropped DLL
  PID:1832
- - C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious behavior: EnumeratesProcesses
    - Loads dropped DLL
    PID:1984

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

Replay Monitor

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Downloads

memory/1984-18-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1984-21-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1984-22-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download

Analysis

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