gurcu | 7b2dea7a8eff410159459e3f89c5e4fa81f8b9d2f6ce02cfaf8e307f3adf9f85

Resubmissions

14-09-2023 12:20

230914-phrlvsee77 10

Analysis

max time kernel
143s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
14-09-2023 12:20

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General

Target

t40bd50ace847a114b83265af91b7.exe
Size

315KB
MD5

302fb687c1912342845fe7aa4517754c
SHA1

4b38aa9b8cc0e9696c3d79ad057d9f1caad86c55
SHA256

7b2dea7a8eff410159459e3f89c5e4fa81f8b9d2f6ce02cfaf8e307f3adf9f85
SHA512

7f84eb441ed7b4e0296f37cc16015d96b9cf829648e46058248d3e7b731a443e2c549f07ba7632f49f12e44d6759efdc7ccadd184a87ac2aa19597d1263931da
SSDEEP

6144:8T9+O50zYvPAtwVj6XbeBuQdwLaA19bUUyFLa:84H8XQ3QdwLaZUWL

Score

10^/10

gurcu collection discovery spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6237712604:AAESgAGfaQ0EUC8eWgMd7kpAW_FEGRDRfDs/sendMessage?chat_id=880824160

Signatures

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

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-1-5-21-1859779917-101786662-3680946609-1000\Control Panel\International\Geo\Nation	t40bd50ace847a114b83265af91b7.exe

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

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t40bd50ace847a114b83265af91b7.exe
Key opened	\REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t40bd50ace847a114b83265af91b7.exe
Key opened	\REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t40bd50ace847a114b83265af91b7.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

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
43	ip-api.com

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

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2008	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4312	t40bd50ace847a114b83265af91b7.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4312	t40bd50ace847a114b83265af91b7.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4312 wrote to memory of 4776	4312	t40bd50ace847a114b83265af91b7.exe	90
PID 4312 wrote to memory of 4776	4312	t40bd50ace847a114b83265af91b7.exe	90
PID 4776 wrote to memory of 3512	4776	cmd.exe	92
PID 4776 wrote to memory of 3512	4776	cmd.exe	92
PID 4776 wrote to memory of 2008	4776	cmd.exe	93
PID 4776 wrote to memory of 2008	4776	cmd.exe	93

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t40bd50ace847a114b83265af91b7.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t40bd50ace847a114b83265af91b7.exe

C:\Users\Admin\AppData\Local\Temp\t40bd50ace847a114b83265af91b7.exe
"C:\Users\Admin\AppData\Local\Temp\t40bd50ace847a114b83265af91b7.exe"
1⤵
- Checks computer location settings
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:4312
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\t40bd50ace847a114b83265af91b7.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4776
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3512
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2008

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/4312-0-0x000001E794D20000-0x000001E794D74000-memory.dmp

Filesize
336KB

Download
memory/4312-1-0x00007FFF2B8A0000-0x00007FFF2C361000-memory.dmp

Filesize
10.8MB

Download
memory/4312-2-0x000001E7AF390000-0x000001E7AF3A0000-memory.dmp

Filesize
64KB

Download
memory/4312-4-0x00007FFF2B8A0000-0x00007FFF2C361000-memory.dmp

Filesize
10.8MB

Download
memory/4312-6-0x00007FFF2B8A0000-0x00007FFF2C361000-memory.dmp

Filesize
10.8MB

Download