gurcu | c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d | Triage™

Resubmissions

10/04/2024, 02:41

240410-c6hmmsfd7z10

10/04/2024, 02:41

240410-c6g14scb4610

10/04/2024, 02:41

240410-c6gqcacb4510

10/04/2024, 02:41

240410-c6f4tacb4410

14/10/2023, 01:33

231014-bysbfahh6s10

Analysis

max time kernel
9s
max time network
1120s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
10/04/2024, 02:41

Sharing

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Report Analysis Logs

General

Target
x19a4f9f3d16fcc9779ba8ea79bf7.exe
Size 392KB
Sample240410-c6g14scb46
SHA256 c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d
MD5 2299a17350433284e58bd0fcc10edf41
SHA1 d477f1cd55365db00ca77cc5459afabe1ffc80b3
SHA512 123d18cf17b4bb0f0b16414039c2381f77e9f12c96a109d5847c760e4d7fb64f6c592f8f185a4c0375aade6754afd0abd6a196936adac405290f157829ae25a1
SSDEEP 6144:5cJGLvLE5hu6Me646G0D1ecme1x9b31v4n:uUvLr6k9b5ecmed1v4
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gurcu collection spyware stealer

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6193093056:AAHzyNGUGS9aUG6CCx6ENLoXpCFLzEQywIQ/sendMessage?chat_id=1098292643

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu

Executes dropped EXE 1 IoCs

pid	Process
2692	x19a4f9f3d16fcc9779ba8ea79bf7.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

Email Collection

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3727096518-2913484142-3593445157-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Key opened	\REGISTRY\USER\S-1-5-21-3727096518-2913484142-3593445157-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Key opened	\REGISTRY\USER\S-1-5-21-3727096518-2913484142-3593445157-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

Scheduled Task/Job

pid	Process
1004	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
2704	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1000	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	2692	x19a4f9f3d16fcc9779ba8ea79bf7.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1000 wrote to memory of 4748	1000	x19a4f9f3d16fcc9779ba8ea79bf7.exe	74
PID 1000 wrote to memory of 4748	1000	x19a4f9f3d16fcc9779ba8ea79bf7.exe	74
PID 4748 wrote to memory of 3868	4748	cmd.exe	76
PID 4748 wrote to memory of 3868	4748	cmd.exe	76
PID 4748 wrote to memory of 2704	4748	cmd.exe	77
PID 4748 wrote to memory of 2704	4748	cmd.exe	77
PID 4748 wrote to memory of 1004	4748	cmd.exe	78
PID 4748 wrote to memory of 1004	4748	cmd.exe	78
PID 4748 wrote to memory of 2692	4748	cmd.exe	79
PID 4748 wrote to memory of 2692	4748	cmd.exe	79

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3727096518-2913484142-3593445157-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3727096518-2913484142-3593445157-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe

C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe
"C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1000
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "x19a4f9f3d16fcc9779ba8ea79bf7" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4748
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3868
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2704
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "x19a4f9f3d16fcc9779ba8ea79bf7" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1004
- - C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Credential Access

Unsecured Credentials

Credentials In Files

Credentials in Registry

Discovery

Query Registry

Remote System Discovery

System Information Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

x19a4f9f3d16fcc9779ba8ea79bf7.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\x19a4f9f3d16fcc9779ba8ea79bf7.exe.log
Size 847B
SHA256 cae801b0499949178298c1c1a083f7c0febb971d262be9c9588437af66c76ef0
MD5 a908a7c6e93edeb3e400780b6fe62dde
SHA1 36e2b437f41443f6b41b45b35a0f97b2cd94123d
SHA512 deb437dcb1440d37bcd61dfa43be05fd01856a1d1e59aa5b2dfa142e9ae584b0577eea024edb99d8e74e3a1b606bb7ae3b4f9cd8eb30813e67dda678b9319cbe
MD5 SHA1 SHA512

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x19a4f9f3d16fcc9779ba8ea79bf7.exe

Path C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
Size 392KB
SHA256 c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d
MD5 2299a17350433284e58bd0fcc10edf41
SHA1 d477f1cd55365db00ca77cc5459afabe1ffc80b3
SHA512 123d18cf17b4bb0f0b16414039c2381f77e9f12c96a109d5847c760e4d7fb64f6c592f8f185a4c0375aade6754afd0abd6a196936adac405290f157829ae25a1
SSDEEP 6144:5cJGLvLE5hu6Me646G0D1ecme1x9b31v4n:uUvLr6k9b5ecmed1v4
MD5 SHA1 SHA512 SSDEEP

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memory/1000-0-0x0000016647390000-0x00000166473F8000-memory.dmp

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memory/1000-1-0x00007FFF2CBC0000-0x00007FFF2D5AC000-memory.dmp

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memory/1000-4-0x0000016661910000-0x0000016661920000-memory.dmp

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memory/1000-6-0x00007FFF2CBC0000-0x00007FFF2D5AC000-memory.dmp

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memory/2692-11-0x00007FFF2CBC0000-0x00007FFF2D5AC000-memory.dmp

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memory/2692-12-0x0000019FFBD30000-0x0000019FFBD40000-memory.dmp

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