gurcu | 631d7e6e0d9b03928ea24c0f846e3aad741bd675b8837035e8bdc028dc25fc98

Resubmissions

22-05-2023 08:14

230522-j48vdafa34 10

30-03-2023 14:59

230330-scqn6adb45 7

Analysis

max time kernel
135s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2023 08:14

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General

Target

5a1a37fb68eeb445df8c647dab8af952.exe
Size

48KB
MD5

5a1a37fb68eeb445df8c647dab8af952
SHA1

95f2c1a9ae32d39ed616d2007bbcf6f74feba18f
SHA256

631d7e6e0d9b03928ea24c0f846e3aad741bd675b8837035e8bdc028dc25fc98
SHA512

349c588d9fc96ecf4db16004afec719e00e6ec887a4d89319a150b9ef75b1836fb8dfbff1a1fc0953a0dccf6a27ae117a00cd94c0991ecc70931fd1349cd8d05
SSDEEP

768:4g/hgfJYO9KqosayemfSbvZ5l9GCAPk2/PWC/cEnUSBQtP9:R/hgGO9KrHmKbvtelRJnUSBiP9

Score

10^/10

gurcu spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6288342522:AAFSUbGsrmP7ztzdv4uDMwLGETn2Ea_tq1M/sendMessage?chat_id=1953693386

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-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	5a1a37fb68eeb445df8c647dab8af952.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
T1081

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
5	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
3604	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1920	5a1a37fb68eeb445df8c647dab8af952.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 1752	1920	5a1a37fb68eeb445df8c647dab8af952.exe	84
PID 1920 wrote to memory of 1752	1920	5a1a37fb68eeb445df8c647dab8af952.exe	84
PID 1752 wrote to memory of 1828	1752	cmd.exe	86
PID 1752 wrote to memory of 1828	1752	cmd.exe	86
PID 1752 wrote to memory of 3604	1752	cmd.exe	87
PID 1752 wrote to memory of 3604	1752	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\5a1a37fb68eeb445df8c647dab8af952.exe
"C:\Users\Admin\AppData\Local\Temp\5a1a37fb68eeb445df8c647dab8af952.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1920
- 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\5a1a37fb68eeb445df8c647dab8af952.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1752
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1828
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:3604

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1920-133-0x0000022444360000-0x0000022444372000-memory.dmp

Filesize
72KB

Download
memory/1920-134-0x000002245E9E0000-0x000002245EA30000-memory.dmp

Filesize
320KB

Download
memory/1920-135-0x000002245E880000-0x000002245E890000-memory.dmp

Filesize
64KB

Download