masslogger | cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793

General

Target

img_0933.exe
Size

1.4MB
MD5

f8d0bab3e3367fbd94c1f82eb33714e7
SHA1

e457ae2ad469dd932300a02a4e3b9c03010d5e31
SHA256

cc6b0848a3a848c9ee7ce3f63d1e3f95393f6593140e2aab400146c06e593793
SHA512

0064460f534399a26e4dd2e29804c3f8b7cd3d8b97808a9ae713c6e7eed0facd621ed3d98f3dad1b655ed051e069fbb9e513b1d51d0ccf61bfde30f668c65784

Score

10^/10

Malware Config

Signatures

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1500	img_0933.exe
Token: SeDebugPrivilege	1124	.exe
Token: SeDebugPrivilege	1952	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1500	img_0933.exe
1500	img_0933.exe
1500	img_0933.exe
1124	.exe
1124	.exe
1124	.exe
1952	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1500 wrote to memory of 1696	1500	img_0933.exe	24
PID 1500 wrote to memory of 1696	1500	img_0933.exe	24
PID 1500 wrote to memory of 1696	1500	img_0933.exe	24
PID 1500 wrote to memory of 1696	1500	img_0933.exe	24
PID 1696 wrote to memory of 1784	1696	cmd.exe	26
PID 1696 wrote to memory of 1784	1696	cmd.exe	26
PID 1696 wrote to memory of 1784	1696	cmd.exe	26
PID 1696 wrote to memory of 1784	1696	cmd.exe	26
PID 1500 wrote to memory of 1124	1500	img_0933.exe	30
PID 1500 wrote to memory of 1124	1500	img_0933.exe	30
PID 1500 wrote to memory of 1124	1500	img_0933.exe	30
PID 1500 wrote to memory of 1124	1500	img_0933.exe	30
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31
PID 1124 wrote to memory of 1952	1124	.exe	31

Executes dropped EXE 2 IoCs

pid	Process
1124	.exe
1952	RegAsm.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

Loads dropped DLL 3 IoCs

pid	Process
1500	img_0933.exe
1124	.exe
1952	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1124 set thread context of 1952	1124	.exe	31

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-1-5-21-910373003-3952921535-3480519689-1000\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
MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger

C:\Users\Admin\AppData\Local\Temp\img_0933.exe
"C:\Users\Admin\AppData\Local\Temp\img_0933.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- Loads dropped DLL
PID:1500
- 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:1696
- - 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:1784
- C:\Users\Admin\Desktop\.exe
  "C:\Users\Admin\Desktop\.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  PID:1124
- - C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
    "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious behavior: EnumeratesProcesses
    - Executes dropped EXE
    - Loads dropped DLL
    PID:1952

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/1952-18-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1952-21-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1952-22-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download

Analysis

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