lucastealer | 4d39b23c7878830c7ec428f0ea6949aeeb9822004ab1d579940b89c1b9201e50

General

Target

33.exe
Size

2.5MB
MD5

a094693a978562418fdd5cf8b605a52b
SHA1

89f2b7014486ac0528a47fa6caaedff45d02e9c9
SHA256

336e044e990d0d7e5ffeb12923b9e171b823a751d165976893bfe4d714d4b4f9
SHA512

4fa6003569ca0b93aef3f75abd46ec242adee2547fe74f774fa44cbd13eefcc8aaef087475e42a63dce3575146d1ee76c038692f1a2400806a489a11adb58569
SSDEEP

49152:oxnjHmbOaZiqi75PBZ5oJFDr7CMfdmM0VSGn:rXZiqi7/kzfdmM0VSGn

Score

10^/10

lucastealer persistence stealer

Malware Config

Signatures

Luca Stealer
Info stealer written in Rust first seen in July 2022.
stealer lucastealer

Luca Stealer payload 4 IoCs

resource	yara_rule
behavioral1/files/0x0006000000023256-10.dat	family_lucastealer
behavioral1/files/0x0006000000023256-16.dat	family_lucastealer
behavioral1/files/0x0006000000023256-15.dat	family_lucastealer
behavioral1/files/0x0006000000023256-49.dat	family_lucastealer

Downloads MZ/PE file

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1926387074-3400613176-3566796709-1000\Control Panel\International\Geo\Nation	33.exe

Executes dropped EXE 2 IoCs

pid	Process
3680	test.exe
812	test.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1926387074-3400613176-3566796709-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\downloader = "C:\\Program Files\\Windows NT\\downloader.exe"	33.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
228	NOTEPAD.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2140	powershell.exe
2140	powershell.exe
3696	powershell.exe
3696	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeDebugPrivilege	3696	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2572 wrote to memory of 3680	2572	33.exe	90
PID 2572 wrote to memory of 3680	2572	33.exe	90
PID 3680 wrote to memory of 2140	3680	test.exe	91
PID 3680 wrote to memory of 2140	3680	test.exe	91
PID 812 wrote to memory of 3696	812	test.exe	108
PID 812 wrote to memory of 3696	812	test.exe	108

C:\Users\Admin\AppData\Local\Temp\33.exe
"C:\Users\Admin\AppData\Local\Temp\33.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2572
- C:\Users\Admin\AppData\Local\Temp\test.exe
  "C:\Users\Admin\AppData\Local\Temp\test.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3680
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" -WindowStyle Hidden -Command "Set-MpPreference -ExclusionPath" C:\
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2140

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3700

C:\Users\Admin\AppData\Local\Temp\test.exe
"C:\Users\Admin\AppData\Local\Temp\test.exe"
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:812
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -WindowStyle Hidden -Command "Set-MpPreference -ExclusionPath" C:\
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3696

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\Eo5EhxvsCD5b2n8imFEE5XO9PwIHKZ\user_info.txt
1⤵
- Opens file in notepad (likely ransom note)
PID:228

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ag5w2o5l.sdm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4.2MB

MD5
a463e8c66b6bbe9d3c8d65f7554803c9

SHA1
98e66c663e3e269d62617ededc75a1fdbd1efc15

SHA256
4a9fad4b35a2aee9bd5c65d373318499fdd7e92989bc41709fe851642f28b65a

SHA512
346654d866f53012b50879ed477488bf4b2bd31e7d6cc85145777b6c9391a5ce34ad64971793a6972775d3190f16c6b04541f5b2286a461e2234f4dc1a382e84

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

Filesize
4.2MB

MD5
a463e8c66b6bbe9d3c8d65f7554803c9

SHA1
98e66c663e3e269d62617ededc75a1fdbd1efc15

SHA256
4a9fad4b35a2aee9bd5c65d373318499fdd7e92989bc41709fe851642f28b65a

SHA512
346654d866f53012b50879ed477488bf4b2bd31e7d6cc85145777b6c9391a5ce34ad64971793a6972775d3190f16c6b04541f5b2286a461e2234f4dc1a382e84

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

Filesize
4.2MB

MD5
a463e8c66b6bbe9d3c8d65f7554803c9

SHA1
98e66c663e3e269d62617ededc75a1fdbd1efc15

SHA256
4a9fad4b35a2aee9bd5c65d373318499fdd7e92989bc41709fe851642f28b65a

SHA512
346654d866f53012b50879ed477488bf4b2bd31e7d6cc85145777b6c9391a5ce34ad64971793a6972775d3190f16c6b04541f5b2286a461e2234f4dc1a382e84

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

Filesize
4.2MB

MD5
a463e8c66b6bbe9d3c8d65f7554803c9

SHA1
98e66c663e3e269d62617ededc75a1fdbd1efc15

SHA256
4a9fad4b35a2aee9bd5c65d373318499fdd7e92989bc41709fe851642f28b65a

SHA512
346654d866f53012b50879ed477488bf4b2bd31e7d6cc85145777b6c9391a5ce34ad64971793a6972775d3190f16c6b04541f5b2286a461e2234f4dc1a382e84

Download Submit
memory/2140-30-0x000002A168F10000-0x000002A168F20000-memory.dmp

Filesize
64KB

Download
memory/2140-29-0x000002A168F10000-0x000002A168F20000-memory.dmp

Filesize
64KB

Download
memory/2140-33-0x00007FFD583F0000-0x00007FFD58EB1000-memory.dmp

Filesize
10.8MB

Download
memory/2140-17-0x000002A168F50000-0x000002A168F72000-memory.dmp

Filesize
136KB

Download
memory/2140-28-0x000002A168F10000-0x000002A168F20000-memory.dmp

Filesize
64KB

Download
memory/2140-27-0x00007FFD583F0000-0x00007FFD58EB1000-memory.dmp

Filesize
10.8MB

Download
memory/2572-34-0x0000000000400000-0x00000000004FC000-memory.dmp

Filesize
1008KB

Download
memory/3696-60-0x0000016233970000-0x0000016233980000-memory.dmp

Filesize
64KB

Download
memory/3696-56-0x00007FFD57CA0000-0x00007FFD58761000-memory.dmp

Filesize
10.8MB

Download
memory/3696-62-0x0000016233970000-0x0000016233980000-memory.dmp

Filesize
64KB

Download
memory/3696-64-0x0000016233970000-0x0000016233980000-memory.dmp

Filesize
64KB

Download
memory/3696-66-0x00007FFD57CA0000-0x00007FFD58761000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads