masslogger | d2232949a80b21e9c967490be35b87ba8e5495cb61b10493b5adb1297e37dd4b

General

Target

Neptune_028887E.exe
Size

1.4MB
MD5

8dff4b620965db5895629bc5e4733154
SHA1

7aab2496a2cba81df62eb42b6b069dcba4e80424
SHA256

8ba2916d91cfaa19c67d2e8a9603fca8a41fac3f960b79edcadab0bb094c3e52
SHA512

fc901d3cb5908ee2a094577d669d0acba760e2ea30fd514845ce674dd0e150c9813c4ef933b76521e93d7357aa5e432f5ee1493468497caa013a4b795087a846

Score

10^/10

masslogger spyware stealer

Malware Config

Signatures

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

MassLogger Main Payload 3 IoCs

resource	yara_rule
behavioral2/memory/2260-130-0x0000000000F50000-0x00000000010C2000-memory.dmp	family_masslogger
behavioral2/files/0x00060000000231c7-137.dat	family_masslogger
behavioral2/files/0x00060000000231c7-138.dat	family_masslogger

Executes dropped EXE 1 IoCs

pid	Process
1532	mas.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	Neptune_028887E.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	mas.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
2260	Neptune_028887E.exe
1532	mas.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2260	Neptune_028887E.exe
Token: SeDebugPrivilege	1532	mas.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 4120	2260	Neptune_028887E.exe	83
PID 2260 wrote to memory of 4120	2260	Neptune_028887E.exe	83
PID 2260 wrote to memory of 4120	2260	Neptune_028887E.exe	83
PID 4120 wrote to memory of 4504	4120	cmd.exe	85
PID 4120 wrote to memory of 4504	4120	cmd.exe	85
PID 4120 wrote to memory of 4504	4120	cmd.exe	85
PID 2260 wrote to memory of 1532	2260	Neptune_028887E.exe	89
PID 2260 wrote to memory of 1532	2260	Neptune_028887E.exe	89
PID 2260 wrote to memory of 1532	2260	Neptune_028887E.exe	89
PID 1532 wrote to memory of 4056	1532	mas.exe	93
PID 1532 wrote to memory of 4056	1532	mas.exe	93
PID 1532 wrote to memory of 4056	1532	mas.exe	93
PID 4056 wrote to memory of 4304	4056	cmd.exe	95
PID 4056 wrote to memory of 4304	4056	cmd.exe	95
PID 4056 wrote to memory of 4304	4056	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\Neptune_028887E.exe
"C:\Users\Admin\AppData\Local\Temp\Neptune_028887E.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2260
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\mas.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4120
- - C:\Windows\SysWOW64\reg.exe
    REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\mas.exe"
    3⤵
    PID:4504
- C:\Users\Admin\AppData\Roaming\mas.exe
  "C:\Users\Admin\AppData\Roaming\mas.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1532
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\mas.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4056
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\mas.exe"
      4⤵
      PID:4304

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\mas.exe

Filesize
1.4MB

MD5
8dff4b620965db5895629bc5e4733154

SHA1
7aab2496a2cba81df62eb42b6b069dcba4e80424

SHA256
8ba2916d91cfaa19c67d2e8a9603fca8a41fac3f960b79edcadab0bb094c3e52

SHA512
fc901d3cb5908ee2a094577d669d0acba760e2ea30fd514845ce674dd0e150c9813c4ef933b76521e93d7357aa5e432f5ee1493468497caa013a4b795087a846

Download Submit
C:\Users\Admin\AppData\Roaming\mas.exe

Filesize
1.4MB

MD5
8dff4b620965db5895629bc5e4733154

SHA1
7aab2496a2cba81df62eb42b6b069dcba4e80424

SHA256
8ba2916d91cfaa19c67d2e8a9603fca8a41fac3f960b79edcadab0bb094c3e52

SHA512
fc901d3cb5908ee2a094577d669d0acba760e2ea30fd514845ce674dd0e150c9813c4ef933b76521e93d7357aa5e432f5ee1493468497caa013a4b795087a846

Download Submit
memory/2260-130-0x0000000000F50000-0x00000000010C2000-memory.dmp

Filesize
1.4MB

Download
memory/2260-131-0x00000000066D0000-0x0000000006C74000-memory.dmp

Filesize
5.6MB

Download
memory/2260-132-0x0000000006200000-0x0000000006292000-memory.dmp

Filesize
584KB

Download
memory/2260-133-0x0000000007380000-0x00000000073C4000-memory.dmp

Filesize
272KB

Download

Analysis

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