purelogstealer | ff1a81ba33a6328568c2c3fa6c02d90909322624fd07c76d9fb300e56d47092a

Analysis

max time kernel
134s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
28-06-2024 11:42

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General

Target

5.exe
Size

50KB
MD5

a4ae05762502813b211f8a85ade4aaf9
SHA1

d8ccccad0ec7dd9ada63a9b7b2f318d5c2bf7345
SHA256

ff1a81ba33a6328568c2c3fa6c02d90909322624fd07c76d9fb300e56d47092a
SHA512

4ec7b4063079e418d1b7a7d4a81bf823976fb22aa3011914420cd95b1a0f7a0a7b36e3b6a2edbb5395c11c71cbf800747fc2cdaea9fa5fe0ca6df0ee59041dff
SSDEEP

768:hYkXQd1NrfaBQrpl21Ic6ehe9cy3i5j6Aw6/hnkz8IkOWHQki8T:O6Qr8QrMryp+WIhnO8jOWF

Score

10^/10

purelogstealer snakekeylogger collection keylogger persistence spyware stealer

Malware Config

Extracted

Family

snakekeylogger

Credentials

Protocol: smtp
Host:
mail.oleonidas.gr
Port:
587
Username:
[email protected]
Password:
fT@*Lj)MTz0y
Email To:
[email protected]

Signatures

PureLog Stealer
PureLog Stealer is an infostealer written in C#.
stealer purelogstealer
PureLog Stealer payload 1 IoCs

Processes:

resource yara_rule

behavioral2/memory/4516-1-0x0000000000560000-0x0000000000572000-memory.dmp family_purelog_stealer
Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger
Snake Keylogger payload 1 IoCs

Processes:

resource yara_rule

behavioral2/memory/4612-4904-0x0000000000400000-0x0000000000426000-memory.dmp family_snakekeylogger
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
T1552.001

resource	yara_rule
behavioral2/memory/4516-1-0x0000000000560000-0x0000000000572000-memory.dmp	family_purelog_stealer

resource	yara_rule
behavioral2/memory/4612-4904-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

5.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	5.exe
Key opened	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	5.exe
Key opened	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	5.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

5.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Nsxwcunqmuw = "C:\\Users\\Admin\\AppData\\Roaming\\Nsxwcunqmuw.exe"	5.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

49 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

5.exe

description pid process target process

PID 4516 set thread context of 4612 4516 5.exe 5.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

5.exe

pid process

4612 5.exe
4612 5.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

5.exe5.exe

description pid process

Token: SeDebugPrivilege 4516 5.exe
Token: SeDebugPrivilege 4516 5.exe
Token: SeDebugPrivilege 4612 5.exe

flow	ioc
49	checkip.dyndns.org

description	pid	process	target process
PID 4516 set thread context of 4612	4516	5.exe	5.exe

pid	process
4612	5.exe
4612	5.exe

description	pid	process
Token: SeDebugPrivilege	4516	5.exe
Token: SeDebugPrivilege	4516	5.exe
Token: SeDebugPrivilege	4612	5.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

5.exe

description	pid	process	target process
PID 4516 wrote to memory of 4612	4516	5.exe	5.exe
PID 4516 wrote to memory of 4612	4516	5.exe	5.exe
PID 4516 wrote to memory of 4612	4516	5.exe	5.exe
PID 4516 wrote to memory of 4612	4516	5.exe	5.exe
PID 4516 wrote to memory of 4612	4516	5.exe	5.exe
PID 4516 wrote to memory of 4612	4516	5.exe	5.exe
PID 4516 wrote to memory of 4612	4516	5.exe	5.exe
PID 4516 wrote to memory of 4612	4516	5.exe	5.exe

outlook_office_path 1 IoCs

Processes:

5.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 5.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	5.exe

outlook_win_path 1 IoCs

Processes:

5.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	5.exe

C:\Users\Admin\AppData\Local\Temp\5.exe
"C:\Users\Admin\AppData\Local\Temp\5.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4516

C:\Users\Admin\AppData\Local\Temp\5.exe
"C:\Users\Admin\AppData\Local\Temp\5.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:4612

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\5.exe.log
Filesize
1KB

MD5
f3eb81974dc5933681e933f07209ff5f

SHA1
7af8cae0f1d03e82daaf784df9886705685baac7

SHA256
e82069884dd428bd6a1c67fe00c5fa56f9c4d62b538b694694a699588f1f4ab2

SHA512
d9aa3871dffb76c8a73a7940fa03bbc9b65cf575cbd07f7c1fbf490cb0f3d670415eaef0bf79e34689f61ab3cdfbb104efdef004becc12e54b501f02f948aaff

Download Submit
memory/4516-0-0x0000000074BCE000-0x0000000074BCF000-memory.dmp

Filesize
4KB

Download
memory/4516-1-0x0000000000560000-0x0000000000572000-memory.dmp

Filesize
72KB

Download
memory/4516-2-0x0000000004E70000-0x0000000004E76000-memory.dmp

Filesize
24KB

Download
memory/4516-3-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/4516-4-0x00000000074A0000-0x00000000076C8000-memory.dmp

Filesize
2.2MB

Download
memory/4516-5-0x0000000007CC0000-0x0000000008264000-memory.dmp

Filesize
5.6MB

Download
memory/4516-6-0x0000000007920000-0x00000000079B2000-memory.dmp

Filesize
584KB

Download
memory/4516-8-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-22-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-16-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-10-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-7-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-38-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-42-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-68-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-70-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-66-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-64-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-62-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-60-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-58-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-56-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-54-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-52-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-51-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-48-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-46-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-40-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-36-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-34-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-32-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-44-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-30-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-28-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-26-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-24-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-20-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-18-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-14-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-12-0x00000000074A0000-0x00000000076C2000-memory.dmp

Filesize
2.1MB

Download
memory/4516-4893-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/4516-4895-0x0000000005D30000-0x0000000005D7C000-memory.dmp

Filesize
304KB

Download
memory/4516-4894-0x0000000005CD0000-0x0000000005D32000-memory.dmp

Filesize
392KB

Download
memory/4516-4896-0x0000000074BCE000-0x0000000074BCF000-memory.dmp

Filesize
4KB

Download
memory/4516-4897-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/4516-4898-0x0000000000D10000-0x0000000000D64000-memory.dmp

Filesize
336KB

Download
memory/4516-4903-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/4612-4904-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/4612-4905-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/4612-4906-0x0000000004ED0000-0x0000000004F6C000-memory.dmp

Filesize
624KB

Download
memory/4612-4907-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/4612-4908-0x00000000062D0000-0x0000000006320000-memory.dmp

Filesize
320KB

Download
memory/4612-4909-0x00000000064F0000-0x00000000066B2000-memory.dmp

Filesize
1.8MB

Download
memory/4612-4910-0x0000000006380000-0x000000000638A000-memory.dmp

Filesize
40KB

Download
memory/4612-4911-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download