masslogger | 5c9f19d624fe41a825e77a1e2b3e0dd3a424d0372fbecf3867f84e9160bc23d3

General

Target

DHL_January 2020 at 14M_9B7290_PDF.vbs
Size

1.0MB
MD5

06bf59ecf4abab410b7f771d88e0888a
SHA1

17bc62c87ac1af2a943df16fe18aa939ae1459cd
SHA256

5c9f19d624fe41a825e77a1e2b3e0dd3a424d0372fbecf3867f84e9160bc23d3
SHA512

1960dc19f9310d69e49e51ff5318e41d10d0e28debbc4248d9beba1319c7e2a38f11f273d77b365ac73ad582af492acb8f3cd9e8219ecc5bf886288bff308627

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 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2388-8-0x0000000000400000-0x0000000000496000-memory.dmp	family_masslogger
behavioral2/memory/2388-9-0x000000000040188B-mapping.dmp	family_masslogger
behavioral2/memory/1320-11-0x000000001BED0000-0x000000001BF66000-memory.dmp	family_masslogger
behavioral2/memory/2388-12-0x0000000000400000-0x0000000000496000-memory.dmp	family_masslogger
behavioral2/memory/2388-14-0x00000000051F0000-0x0000000005271000-memory.dmp	family_masslogger

Executes dropped EXE 4 IoCs

Processes:

bkkkl.exebkkkl.exebkkkl.exebkkkl.exe

pid process

4040 bkkkl.exe
208 bkkkl.exe
1320 bkkkl.exe
2388 bkkkl.exe
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

bkkkl.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Control Panel\International\Geo\Nation bkkkl.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
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

16 api.ipify.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

bkkkl.exe

description pid process target process

PID 1320 set thread context of 2388 1320 bkkkl.exe bkkkl.exe
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

bkkkl.exe

pid process

2388 bkkkl.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

bkkkl.exe

pid process

2388 bkkkl.exe
2388 bkkkl.exe
2388 bkkkl.exe
2388 bkkkl.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

bkkkl.exebkkkl.exe

pid process

4040 bkkkl.exe
1320 bkkkl.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

bkkkl.exe

description pid process

Token: SeDebugPrivilege 2388 bkkkl.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

bkkkl.exe

pid process

2388 bkkkl.exe

pid	process
4040	bkkkl.exe
208	bkkkl.exe
1320	bkkkl.exe
2388	bkkkl.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Control Panel\International\Geo\Nation	bkkkl.exe

flow	ioc
16	api.ipify.org

description	pid	process	target process
PID 1320 set thread context of 2388	1320	bkkkl.exe	bkkkl.exe

pid	process
2388	bkkkl.exe

pid	process
2388	bkkkl.exe
2388	bkkkl.exe
2388	bkkkl.exe
2388	bkkkl.exe

pid	process
4040	bkkkl.exe
1320	bkkkl.exe

description	pid	process
Token: SeDebugPrivilege	2388	bkkkl.exe

pid	process
2388	bkkkl.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

WScript.exebkkkl.exebkkkl.exe

description	pid	process	target process
PID 580 wrote to memory of 4040	580	WScript.exe	bkkkl.exe
PID 580 wrote to memory of 4040	580	WScript.exe	bkkkl.exe
PID 580 wrote to memory of 4040	580	WScript.exe	bkkkl.exe
PID 4040 wrote to memory of 208	4040	bkkkl.exe	bkkkl.exe
PID 4040 wrote to memory of 208	4040	bkkkl.exe	bkkkl.exe
PID 4040 wrote to memory of 208	4040	bkkkl.exe	bkkkl.exe
PID 4040 wrote to memory of 1320	4040	bkkkl.exe	bkkkl.exe
PID 4040 wrote to memory of 1320	4040	bkkkl.exe	bkkkl.exe
PID 4040 wrote to memory of 1320	4040	bkkkl.exe	bkkkl.exe
PID 1320 wrote to memory of 2388	1320	bkkkl.exe	bkkkl.exe
PID 1320 wrote to memory of 2388	1320	bkkkl.exe	bkkkl.exe
PID 1320 wrote to memory of 2388	1320	bkkkl.exe	bkkkl.exe
PID 1320 wrote to memory of 2388	1320	bkkkl.exe	bkkkl.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\DHL_January 2020 at 14M_9B7290_PDF.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:580

C:\Users\Admin\AppData\Local\Temp\bkkkl.exe
"C:\Users\Admin\AppData\Local\Temp\bkkkl.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4040

C:\Users\Admin\AppData\Local\Temp\bkkkl.exe
"C:\Users\Admin\AppData\Local\Temp\bkkkl.exe"
3⤵
- Executes dropped EXE
PID:208

C:\Users\Admin\AppData\Local\Temp\bkkkl.exe
"C:\Users\Admin\AppData\Local\Temp\bkkkl.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1320

C:\Users\Admin\AppData\Local\Temp\bkkkl.exe
"C:\Users\Admin\AppData\Local\Temp\bkkkl.exe"
4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2388

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\bkkkl.exe
MD5
311512292f477d868ce30955b002dba9

SHA1
ce39b753799b652f8cb49b56562d483e6dff5ecd

SHA256
6a7658618a2814dea0bb2a95b4923ce7800266b1968394b1bcffb9c1d123c73c

SHA512
846548227e4193f1ea74271a5dbf2b2ad4d4afc0e678696d2663cf422d6f030fbc7b1df53fd6ab6cf889ccc0cd8a6269d7123bf9b21689122778af2a3ca017da

Download Submit
C:\Users\Admin\AppData\Local\Temp\bkkkl.exe
MD5
311512292f477d868ce30955b002dba9

SHA1
ce39b753799b652f8cb49b56562d483e6dff5ecd

SHA256
6a7658618a2814dea0bb2a95b4923ce7800266b1968394b1bcffb9c1d123c73c

SHA512
846548227e4193f1ea74271a5dbf2b2ad4d4afc0e678696d2663cf422d6f030fbc7b1df53fd6ab6cf889ccc0cd8a6269d7123bf9b21689122778af2a3ca017da

Download Submit
C:\Users\Admin\AppData\Local\Temp\bkkkl.exe
MD5
311512292f477d868ce30955b002dba9

SHA1
ce39b753799b652f8cb49b56562d483e6dff5ecd

SHA256
6a7658618a2814dea0bb2a95b4923ce7800266b1968394b1bcffb9c1d123c73c

SHA512
846548227e4193f1ea74271a5dbf2b2ad4d4afc0e678696d2663cf422d6f030fbc7b1df53fd6ab6cf889ccc0cd8a6269d7123bf9b21689122778af2a3ca017da

Download Submit
C:\Users\Admin\AppData\Local\Temp\bkkkl.exe
MD5
311512292f477d868ce30955b002dba9

SHA1
ce39b753799b652f8cb49b56562d483e6dff5ecd

SHA256
6a7658618a2814dea0bb2a95b4923ce7800266b1968394b1bcffb9c1d123c73c

SHA512
846548227e4193f1ea74271a5dbf2b2ad4d4afc0e678696d2663cf422d6f030fbc7b1df53fd6ab6cf889ccc0cd8a6269d7123bf9b21689122778af2a3ca017da

Download Submit
C:\Users\Admin\AppData\Local\Temp\bkkkl.exe
MD5
311512292f477d868ce30955b002dba9

SHA1
ce39b753799b652f8cb49b56562d483e6dff5ecd

SHA256
6a7658618a2814dea0bb2a95b4923ce7800266b1968394b1bcffb9c1d123c73c

SHA512
846548227e4193f1ea74271a5dbf2b2ad4d4afc0e678696d2663cf422d6f030fbc7b1df53fd6ab6cf889ccc0cd8a6269d7123bf9b21689122778af2a3ca017da

Download Submit
memory/1320-6-0x0000000000000000-mapping.dmp

Download
memory/1320-11-0x000000001BED0000-0x000000001BF66000-memory.dmp

Filesize
600KB

Download
memory/2388-14-0x00000000051F0000-0x0000000005271000-memory.dmp

Filesize
516KB

Download
memory/2388-9-0x000000000040188B-mapping.dmp

Download
memory/2388-12-0x0000000000400000-0x0000000000496000-memory.dmp

Filesize
600KB

Download
memory/2388-13-0x0000000073610000-0x0000000073CFE000-memory.dmp

Filesize
6.9MB

Download
memory/2388-8-0x0000000000400000-0x0000000000496000-memory.dmp

Filesize
600KB

Download
memory/2388-16-0x00000000056D0000-0x00000000056D1000-memory.dmp

Filesize
4KB

Download
memory/2388-17-0x0000000005C70000-0x0000000005C71000-memory.dmp

Filesize
4KB

Download
memory/2388-18-0x00000000064E0000-0x00000000064E1000-memory.dmp

Filesize
4KB

Download
memory/2388-19-0x0000000006CD0000-0x0000000006CD1000-memory.dmp

Filesize
4KB

Download
memory/2388-20-0x0000000006D20000-0x0000000006D21000-memory.dmp

Filesize
4KB

Download
memory/2388-21-0x0000000006EE0000-0x0000000006EE1000-memory.dmp

Filesize
4KB

Download
memory/4040-2-0x0000000000000000-mapping.dmp

Download

Analysis

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