masslogger | c0917d27811cdd7a7c1267f87cf6135915adbfc7fd4a3f6e74998eef74fae31e

General

Target

Ekstre.exe
Size

1.2MB
MD5

4fa8f3fb34c79b408d7c511c892358cf
SHA1

eded4cc6941f2ebf7d9b08bc98d05190c4d9e054
SHA256

9343011118ad09e9a63a24adb5cc08f406ffc927230b1be998cb263ebf23eedd
SHA512

832d9aaa4806edfdafba5fbcd6b46be87a9432ba5f56328b8254a8a8c2d0d5176a0eb2570c3fa36c0e0a94c27f9d28165e824bcd7249defabac6454b963633a8

Score

10^/10

masslogger persistence 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 11 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1640-54-0x0000000001030000-0x0000000001166000-memory.dmp	family_masslogger
\Users\Admin\Desktop\.exe	family_masslogger
C:\Users\Admin\Desktop\.exe	family_masslogger
C:\Users\Admin\Desktop\.exe	family_masslogger
behavioral1/memory/864-64-0x0000000000CD0000-0x0000000000E06000-memory.dmp	family_masslogger
behavioral1/memory/1104-71-0x0000000000400000-0x000000000049A000-memory.dmp	family_masslogger
behavioral1/memory/1104-72-0x0000000000400000-0x000000000049A000-memory.dmp	family_masslogger
behavioral1/memory/1104-73-0x0000000000400000-0x000000000049A000-memory.dmp	family_masslogger
behavioral1/memory/1104-74-0x000000000049449E-mapping.dmp	family_masslogger
behavioral1/memory/1104-77-0x0000000000400000-0x000000000049A000-memory.dmp	family_masslogger
behavioral1/memory/1104-79-0x0000000000400000-0x000000000049A000-memory.dmp	family_masslogger

Executes dropped EXE 2 IoCs

Processes:

.exeRegAsm.exe

pid process

864 .exe
1104 RegAsm.exe
Loads dropped DLL 3 IoCs

Processes:

Ekstre.exe.exeRegAsm.exe

pid process

1640 Ekstre.exe
864 .exe
1104 RegAsm.exe

pid	process
864	.exe
1104	RegAsm.exe

pid	process
1640	Ekstre.exe
864	.exe
1104	RegAsm.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\Run\admin = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\Desktop\\.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

.exe

description pid process target process

PID 864 set thread context of 1104 864 .exe RegAsm.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 5 IoCs

Processes:

Ekstre.exe.exe

pid process

1640 Ekstre.exe
1640 Ekstre.exe
864 .exe
864 .exe
864 .exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Ekstre.exe.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 1640 Ekstre.exe
Token: SeDebugPrivilege 864 .exe
Token: SeDebugPrivilege 1104 RegAsm.exe

description	pid	process	target process
PID 864 set thread context of 1104	864	.exe	RegAsm.exe

pid	process
1640	Ekstre.exe
1640	Ekstre.exe
864	.exe
864	.exe
864	.exe

description	pid	process
Token: SeDebugPrivilege	1640	Ekstre.exe
Token: SeDebugPrivilege	864	.exe
Token: SeDebugPrivilege	1104	RegAsm.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

Ekstre.execmd.exe.exe

description	pid	process	target process
PID 1640 wrote to memory of 556	1640	Ekstre.exe	cmd.exe
PID 1640 wrote to memory of 556	1640	Ekstre.exe	cmd.exe
PID 1640 wrote to memory of 556	1640	Ekstre.exe	cmd.exe
PID 1640 wrote to memory of 556	1640	Ekstre.exe	cmd.exe
PID 556 wrote to memory of 1720	556	cmd.exe	reg.exe
PID 556 wrote to memory of 1720	556	cmd.exe	reg.exe
PID 556 wrote to memory of 1720	556	cmd.exe	reg.exe
PID 556 wrote to memory of 1720	556	cmd.exe	reg.exe
PID 1640 wrote to memory of 864	1640	Ekstre.exe	.exe
PID 1640 wrote to memory of 864	1640	Ekstre.exe	.exe
PID 1640 wrote to memory of 864	1640	Ekstre.exe	.exe
PID 1640 wrote to memory of 864	1640	Ekstre.exe	.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe
PID 864 wrote to memory of 1104	864	.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\Ekstre.exe
"C:\Users\Admin\AppData\Local\Temp\Ekstre.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1640

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:556

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 key to start application
PID:1720

C:\Users\Admin\Desktop\.exe
"C:\Users\Admin\Desktop\.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:864

C:\Users\Admin\AppData\Local\Temp\RegAsm.exe
"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
PID:1104

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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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
C:\Users\Admin\Desktop\.exe
Filesize
1.2MB

MD5
4fa8f3fb34c79b408d7c511c892358cf

SHA1
eded4cc6941f2ebf7d9b08bc98d05190c4d9e054

SHA256
9343011118ad09e9a63a24adb5cc08f406ffc927230b1be998cb263ebf23eedd

SHA512
832d9aaa4806edfdafba5fbcd6b46be87a9432ba5f56328b8254a8a8c2d0d5176a0eb2570c3fa36c0e0a94c27f9d28165e824bcd7249defabac6454b963633a8

Download Submit
C:\Users\Admin\Desktop\.exe
Filesize
1.2MB

MD5
4fa8f3fb34c79b408d7c511c892358cf

SHA1
eded4cc6941f2ebf7d9b08bc98d05190c4d9e054

SHA256
9343011118ad09e9a63a24adb5cc08f406ffc927230b1be998cb263ebf23eedd

SHA512
832d9aaa4806edfdafba5fbcd6b46be87a9432ba5f56328b8254a8a8c2d0d5176a0eb2570c3fa36c0e0a94c27f9d28165e824bcd7249defabac6454b963633a8

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\Desktop\.exe
Filesize
1.2MB

MD5
4fa8f3fb34c79b408d7c511c892358cf

SHA1
eded4cc6941f2ebf7d9b08bc98d05190c4d9e054

SHA256
9343011118ad09e9a63a24adb5cc08f406ffc927230b1be998cb263ebf23eedd

SHA512
832d9aaa4806edfdafba5fbcd6b46be87a9432ba5f56328b8254a8a8c2d0d5176a0eb2570c3fa36c0e0a94c27f9d28165e824bcd7249defabac6454b963633a8

Download Submit
memory/556-58-0x0000000000000000-mapping.dmp

Download
memory/864-64-0x0000000000CD0000-0x0000000000E06000-memory.dmp

Filesize
1.2MB

Download
memory/864-61-0x0000000000000000-mapping.dmp

Download
memory/1104-71-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1104-73-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1104-82-0x00000000004A0000-0x00000000004E4000-memory.dmp

Filesize
272KB

Download
memory/1104-69-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1104-68-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1104-79-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1104-72-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1104-77-0x0000000000400000-0x000000000049A000-memory.dmp

Filesize
616KB

Download
memory/1104-74-0x000000000049449E-mapping.dmp

Download
memory/1640-56-0x0000000000390000-0x00000000003AC000-memory.dmp

Filesize
112KB

Download
memory/1640-54-0x0000000001030000-0x0000000001166000-memory.dmp

Filesize
1.2MB

Download
memory/1640-55-0x0000000076241000-0x0000000076243000-memory.dmp

Filesize
8KB

Download
memory/1640-57-0x00000000004F0000-0x00000000004FA000-memory.dmp

Filesize
40KB

Download
memory/1720-59-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads