masslogger | e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4

General

Target

e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe
Size

804KB
MD5

277d2552513e4d0d0b60ee61d55f0e37
SHA1

9c556c184ea92857197a3934b894660e3416b30e
SHA256

e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4
SHA512

fa76bd9b0c1e477d3dd8ad78e38cb9efc5088bc83e2eb54812062cdbd1191700634cb3443b704de3aecec6fcf714840473d7eeda3f3cf5a7a606637b0aab4b82

Score

10^/10

masslogger collection 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 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2012-64-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/2012-65-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/2012-66-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/2012-67-0x00000000004819FE-mapping.dmp	family_masslogger
behavioral1/memory/2012-70-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger
behavioral1/memory/2012-72-0x0000000000400000-0x0000000000486000-memory.dmp	family_masslogger

Executes dropped EXE 1 IoCs

Processes:

RegAsm.exe

pid process

2012 RegAsm.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:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Control Panel\International\Geo\Nation RegAsm.exe

pid	process
2012	RegAsm.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Loads dropped DLL 3 IoCs

Processes:

e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exeRegAsm.exe

pid	process
1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe
1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe
2012	RegAsm.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 35 IoCs

collection

Email Collection

T1114

Processes:

RegAsm.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\17.0\Outlook\Profiles\Outlook	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\18.0\Outlook\Profiles\Outlook	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\19.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	RegAsm.exe
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	RegAsm.exe
Key created	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	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.

Processes:

flow ioc

4 api.ipify.org

flow	ioc
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

Processes:

e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe

description	pid	process	target process
PID 1400 set thread context of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exeRegAsm.exe

pid process

1400 e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe
2012 RegAsm.exe
2012 RegAsm.exe
2012 RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exeRegAsm.exe

description	pid	process
Token: SeDebugPrivilege	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe
Token: SeDebugPrivilege	2012	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe

description	pid	process	target process
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe
PID 1400 wrote to memory of 2012	1400	e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe	RegAsm.exe

outlook_office_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Office\20.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

Processes:

RegAsm.exe

description	ioc	process
Key queried	\REGISTRY\USER\S-1-5-21-3422572840-2899912402-917774768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe
"C:\Users\Admin\AppData\Local\Temp\e4ef7fd36fe35a933c6ac97a274a0598a78cfb4f5144525c0ad25d5b55f1a3a4.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1400
- C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Loads dropped DLL
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:2012

Network

MITRE ATT&CK Enterprise 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

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
\Users\Admin\AppData\Local\Temp\RegAsm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
\Users\Admin\AppData\Local\Temp\b6f96cbd-28d1-43bc-88f5-383eb90a6caf\e.dll

Filesize
94KB

MD5
14ff402962ad21b78ae0b4c43cd1f194

SHA1
f8a510eb26666e875a5bdd1cadad40602763ad72

SHA256
fb9646cb956945bdc503e69645f6b5316d3826b780d3c36738d6b944e884d15b

SHA512
daa7a08bf3709119a944bce28f6ebdd24e54a22b18cd9f86a87873e958df121a3881dcdd5e162f6b4e543238c7aef20f657c9830df01d4c79290f7c9a4fcc54b

Download Submit
memory/1400-59-0x00000000005A0000-0x00000000005AC000-memory.dmp

Filesize
48KB

Download
memory/1400-54-0x0000000000CE0000-0x0000000000DB0000-memory.dmp

Filesize
832KB

Download
memory/1400-56-0x00000000004B0000-0x00000000004D6000-memory.dmp

Filesize
152KB

Download
memory/1400-55-0x0000000075BD1000-0x0000000075BD3000-memory.dmp

Filesize
8KB

Download
memory/2012-61-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2012-62-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2012-64-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2012-65-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2012-66-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2012-67-0x00000000004819FE-mapping.dmp

Download
memory/2012-70-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2012-72-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2012-76-0x0000000004F95000-0x0000000004FA6000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads