gurcu | c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9 | Triage™

Resubmissions

10/04/2024, 02:28

240410-cyaxtsca4310

10/04/2024, 02:28

240410-cx45aaca3610

10/04/2024, 02:28

240410-cx4hrafc6110

10/04/2024, 02:28

240410-cx37zsfc6y10

14/10/2023, 01:16

231014-bm3ysshd6t10

Analysis

max time kernel
315s
max time network
461s
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, 02:28

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
m1f1f3a069223072f8d6802a079235d.exe
Size 306KB
Sample240410-cx4hrafc61
SHA256 c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9
MD5 4b36dcaa94c3eca48a6292bd670ffe79
SHA1 705484e61ac39ba02cc80903be0da6ce74333334
SHA512 cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a
SSDEEP 3072:71E/yXS0m2pOVLVewP2D/kIyC+mvXi1QJIkjXAToknBq9tT/8RJ6W3t3dpdQGqKI:7E2mDMtqa5EOTeKXAllKD9bmTneefA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gurcu collection spyware stealer

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6209822134:AAHQxD-CI1YDVcNbXijXHlonsEUgv3dfYtg/sendMessage?chat_id=-1001529292045

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
3872	m1f1f3a069223072f8d6802a079235d.exe
4908	m1f1f3a069223072f8d6802a079235d.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 6 IoCs

Email Collection

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-81807878-2351072935-4259904108-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe
Key opened	\REGISTRY\USER\S-1-5-21-81807878-2351072935-4259904108-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe
Key opened	\REGISTRY\USER\S-1-5-21-81807878-2351072935-4259904108-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe
Key opened	\REGISTRY\USER\S-1-5-21-81807878-2351072935-4259904108-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe
Key opened	\REGISTRY\USER\S-1-5-21-81807878-2351072935-4259904108-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe
Key opened	\REGISTRY\USER\S-1-5-21-81807878-2351072935-4259904108-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.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.

flow	ioc
29	ip-api.com

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
4916	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
4964	PING.EXE

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4300	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	3872	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	4908	m1f1f3a069223072f8d6802a079235d.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4300 wrote to memory of 3560	4300	m1f1f3a069223072f8d6802a079235d.exe	72
PID 4300 wrote to memory of 3560	4300	m1f1f3a069223072f8d6802a079235d.exe	72
PID 3560 wrote to memory of 1536	3560	cmd.exe	74
PID 3560 wrote to memory of 1536	3560	cmd.exe	74
PID 3560 wrote to memory of 4964	3560	cmd.exe	75
PID 3560 wrote to memory of 4964	3560	cmd.exe	75
PID 3560 wrote to memory of 4916	3560	cmd.exe	76
PID 3560 wrote to memory of 4916	3560	cmd.exe	76
PID 3560 wrote to memory of 3872	3560	cmd.exe	77
PID 3560 wrote to memory of 3872	3560	cmd.exe	77

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-1-5-21-81807878-2351072935-4259904108-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-81807878-2351072935-4259904108-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	m1f1f3a069223072f8d6802a079235d.exe

C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe
"C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4300
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "m1f1f3a069223072f8d6802a079235d" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3560
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1536
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4964
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "m1f1f3a069223072f8d6802a079235d" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4916
- - C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious use of AdjustPrivilegeToken
    PID:3872

C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
1⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:4908

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

Loading Replay Monitor...

Downloads

m1f1f3a069223072f8d6802a079235d.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\m1f1f3a069223072f8d6802a079235d.exe.log
Size 847B
SHA256 cae801b0499949178298c1c1a083f7c0febb971d262be9c9588437af66c76ef0
MD5 a908a7c6e93edeb3e400780b6fe62dde
SHA1 36e2b437f41443f6b41b45b35a0f97b2cd94123d
SHA512 deb437dcb1440d37bcd61dfa43be05fd01856a1d1e59aa5b2dfa142e9ae584b0577eea024edb99d8e74e3a1b606bb7ae3b4f9cd8eb30813e67dda678b9319cbe
MD5 SHA1 SHA512

Submit Download

m1f1f3a069223072f8d6802a079235d.exe

Path C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
Size 306KB
SHA256 c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9
MD5 4b36dcaa94c3eca48a6292bd670ffe79
SHA1 705484e61ac39ba02cc80903be0da6ce74333334
SHA512 cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a
SSDEEP 3072:71E/yXS0m2pOVLVewP2D/kIyC+mvXi1QJIkjXAToknBq9tT/8RJ6W3t3dpdQGqKI:7E2mDMtqa5EOTeKXAllKD9bmTneefA
MD5 SHA1 SHA512 SSDEEP

Submit Download

port.dat

Path C:\Users\Admin\AppData\Local\d67800nkmj\port.dat
Size 4B
SHA256 f53c1ad5dbded0ff16324748bb2e64405601acde699e59a59e25c3b6cd35554a
MD5 03227b950778ab86436ff79fe975b596
SHA1 825c8bf5dfc889e24c9d9f51874d6007aaca021d
SHA512 1223213c8f148e277eb3c08a6e4951814562662e4a5190ad0037eb7aa8456ac5eadf198e6ccb37a9d8dd84ff38b833b51c1045f8bb4d6b9925aabd6ae2cd724f
MD5 SHA1 SHA512

Submit Download

memory/3872-16-0x000002771DDC0000-0x000002771DDD0000-memory.dmp

Download

memory/3872-11-0x00007FFCC8AA0000-0x00007FFCC948C000-memory.dmp

Download

memory/3872-12-0x000002771DDC0000-0x000002771DDD0000-memory.dmp

Download

memory/3872-15-0x00007FFCC8AA0000-0x00007FFCC948C000-memory.dmp

Download

memory/4300-6-0x00007FFCC8AA0000-0x00007FFCC948C000-memory.dmp

Download

memory/4300-2-0x000001FC1D400000-0x000001FC1D410000-memory.dmp

Download

memory/4300-0-0x000001FC1B720000-0x000001FC1B772000-memory.dmp

Download

memory/4300-1-0x00007FFCC8AA0000-0x00007FFCC948C000-memory.dmp

Download

memory/4908-18-0x00007FFCC8AA0000-0x00007FFCC948C000-memory.dmp

Download

memory/4908-19-0x000002395C6C0000-0x000002395C6D0000-memory.dmp

Download

memory/4908-22-0x00007FFCC8AA0000-0x00007FFCC948C000-memory.dmp

Download

memory/4908-23-0x000002395C6C0000-0x000002395C6D0000-memory.dmp

Download