masslogger | 677906173148035544d96ed87acd962194baf88a2c5c6a33e2ad94a850a81835

General

Target

IMG__295541.exe
Size

1.3MB
MD5

5f0dcd355fed551839938d7add9f40e6
SHA1

e628bc47384fe3f5af640e06f31f3c2e9f14d689
SHA256

677906173148035544d96ed87acd962194baf88a2c5c6a33e2ad94a850a81835
SHA512

2004e67ad4f77d9d4d1ae389d6bece2d69fd66a5ed5b0603215477bbef0856c4e32979a3b96ad728a18430d3d4fe9a66ea2517871cbab7e970d48ff638ccf93e

Score

10^/10

Malware Config

Signatures

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
240	IMG__295541.exe
240	IMG__295541.exe
240	IMG__295541.exe
568	.exe
568	.exe
568	.exe
1576	RegAsm.exe

Executes dropped EXE 2 IoCs

pid	Process
568	.exe
1576	RegAsm.exe

MassLogger log file 1 IoCs

Detects a log file produced by MassLogger.

yara_rule
masslogger_log_file

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	240	IMG__295541.exe
Token: SeDebugPrivilege	568	.exe
Token: SeDebugPrivilege	1576	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 240 wrote to memory of 1892	240	IMG__295541.exe	26
PID 240 wrote to memory of 1892	240	IMG__295541.exe	26
PID 240 wrote to memory of 1892	240	IMG__295541.exe	26
PID 240 wrote to memory of 1892	240	IMG__295541.exe	26
PID 1892 wrote to memory of 1756	1892	cmd.exe	28
PID 1892 wrote to memory of 1756	1892	cmd.exe	28
PID 1892 wrote to memory of 1756	1892	cmd.exe	28
PID 1892 wrote to memory of 1756	1892	cmd.exe	28
PID 240 wrote to memory of 568	240	IMG__295541.exe	30
PID 240 wrote to memory of 568	240	IMG__295541.exe	30
PID 240 wrote to memory of 568	240	IMG__295541.exe	30
PID 240 wrote to memory of 568	240	IMG__295541.exe	30
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31
PID 568 wrote to memory of 1576	568	.exe	31

Loads dropped DLL 3 IoCs

pid	Process
240	IMG__295541.exe
568	.exe
1576	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 568 set thread context of 1576	568	.exe	31

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-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run\admin = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\Desktop\\.exe"	reg.exe

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

C:\Users\Admin\AppData\Local\Temp\IMG__295541.exe
"C:\Users\Admin\AppData\Local\Temp\IMG__295541.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- Loads dropped DLL
PID:240
- 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:1892
- - 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:1756
- C:\Users\Admin\Desktop\.exe
  "C:\Users\Admin\Desktop\.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  PID:568
- - C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Loads dropped DLL
    PID:1576

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/1576-19-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download
memory/1576-20-0x0000000000090000-0x000000000012A000-memory.dmp

Filesize
616KB

Download

Analysis

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