masslogger | 420da876f8efdf70da0ec0ccd1b7aaa09547b6868d5fc655c05b50eadf20c360

General

Target

doc07675720200626101857.exe
Size

930KB
MD5

243a515982e6eba872d6366ec71d63b6
SHA1

85b71070f258dce1b5f92ea4aaa117419f6b8828
SHA256

420da876f8efdf70da0ec0ccd1b7aaa09547b6868d5fc655c05b50eadf20c360
SHA512

cfaf4f25351c10962d143de38df4758d1359224975520bc1345d284ab62254b75e6115c1283b47331b312e0e624329f8c402235cb8682d9007419ad0b89122a4

Score

10^/10

spyware stealer masslogger

Malware Config

Signatures

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

doc07675720200626101857.exe

description pid process

Token: SeDebugPrivilege 1020 doc07675720200626101857.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

doc07675720200626101857.exe

pid process

1020 doc07675720200626101857.exe
MassLogger log file 1 IoCs
Detects a log file produced by MassLogger.

Processes:

yara_rule

masslogger_log_file
Suspicious use of SetThreadContext 1 IoCs

Processes:

doc07675720200626101857.exe

description pid process target process

PID 1496 set thread context of 1020 1496 doc07675720200626101857.exe doc07675720200626101857.exe

description	pid	process
Token: SeDebugPrivilege	1020	doc07675720200626101857.exe

pid	process
1020	doc07675720200626101857.exe

yara_rule
masslogger_log_file

description	pid	process	target process
PID 1496 set thread context of 1020	1496	doc07675720200626101857.exe	doc07675720200626101857.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

doc07675720200626101857.exe

description	pid	process	target process
PID 1496 wrote to memory of 1020	1496	doc07675720200626101857.exe	doc07675720200626101857.exe
PID 1496 wrote to memory of 1020	1496	doc07675720200626101857.exe	doc07675720200626101857.exe
PID 1496 wrote to memory of 1020	1496	doc07675720200626101857.exe	doc07675720200626101857.exe
PID 1496 wrote to memory of 1020	1496	doc07675720200626101857.exe	doc07675720200626101857.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

doc07675720200626101857.exe

pid process

1496 doc07675720200626101857.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

doc07675720200626101857.exe

pid process

1020 doc07675720200626101857.exe

pid	process
1496	doc07675720200626101857.exe

pid	process
1020	doc07675720200626101857.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

Processes:

resource	yara_rule
behavioral1/memory/1020-0-0x0000000000400000-0x0000000000542000-memory.dmp	upx
behavioral1/memory/1020-2-0x0000000000400000-0x0000000000542000-memory.dmp	upx
behavioral1/memory/1020-3-0x0000000000400000-0x0000000000542000-memory.dmp	upx

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.

Processes:

flow ioc

4 api.ipify.org
MassLogger
Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.
stealer spyware masslogger
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

doc07675720200626101857.exedoc07675720200626101857.exe

pid process

1496 doc07675720200626101857.exe
1020 doc07675720200626101857.exe
1020 doc07675720200626101857.exe

flow	ioc
4	api.ipify.org

pid	process
1496	doc07675720200626101857.exe
1020	doc07675720200626101857.exe
1020	doc07675720200626101857.exe

C:\Users\Admin\AppData\Local\Temp\doc07675720200626101857.exe
"C:\Users\Admin\AppData\Local\Temp\doc07675720200626101857.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- Suspicious behavior: MapViewOfSection
- Suspicious behavior: EnumeratesProcesses
PID:1496

C:\Users\Admin\AppData\Local\Temp\doc07675720200626101857.exe
"C:\Users\Admin\AppData\Local\Temp\doc07675720200626101857.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
PID:1020

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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/1020-0-0x0000000000400000-0x0000000000542000-memory.dmp

Filesize
1.3MB

Download
memory/1020-1-0x0000000000540BB0-mapping.dmp

Download
memory/1020-2-0x0000000000400000-0x0000000000542000-memory.dmp

Filesize
1.3MB

Download
memory/1020-3-0x0000000000400000-0x0000000000542000-memory.dmp

Filesize
1.3MB

Download
memory/1020-4-0x0000000001EC0000-0x0000000001F5A000-memory.dmp

Filesize
616KB

Download
memory/1020-5-0x0000000000252000-0x0000000000253000-memory.dmp

Filesize
4KB

Download
memory/1020-6-0x0000000000260000-0x00000000002F4000-memory.dmp

Filesize
592KB

Download

Analysis

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