gurcu | e890b9a76c6f9b47913ad5102fd668b556234c6be3488580577a03ed3f61b62c

Analysis

max time kernel
61s
max time network
131s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
06-04-2023 13:30

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General

Target

tmp.exe
Size

77KB
MD5

10f57aeea7d69c1fd26302daea446d8d
SHA1

a2c2b246233565b7deade7a4e27b9bf521cdb714
SHA256

e890b9a76c6f9b47913ad5102fd668b556234c6be3488580577a03ed3f61b62c
SHA512

a28fc863f62f48fa26810ae7c099b03fc85b0d2542b3491aa2b5afb54df1114f415636f0ff048d3a8e0d158ff6378403a60c1ad3e3270c49e06ffea85da2ccb4
SSDEEP

768:oGJtwP79DfSNRjXkUs/2PC0UjobHXyZ3Bs9naW+9SLQ:9J+P7RKNRjXkUs/2KrUbHes9a3SLQ

Score

10^/10

gurcu spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6125631937:AAHzA1e2kkAXSFSX6lSoyDACqaM80kXHnEw/sendMessage?chat_id=6155788902

Signatures

Gurcu
Gurcu stealer is a malware 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-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	tmp.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). Likely ransomware behaviour.

System Information Discovery
T1082

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5028	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1668	tmp.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 2776	1668	tmp.exe	84
PID 1668 wrote to memory of 2776	1668	tmp.exe	84
PID 2776 wrote to memory of 2164	2776	cmd.exe	86
PID 2776 wrote to memory of 2164	2776	cmd.exe	86
PID 2776 wrote to memory of 5028	2776	cmd.exe	87
PID 2776 wrote to memory of 5028	2776	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1668
- 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\tmp.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2164
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:5028

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

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Downloads

memory/1668-133-0x000001CB2C1B0000-0x000001CB2C1C8000-memory.dmp

Filesize
96KB

Download
memory/1668-134-0x000001CB47480000-0x000001CB47490000-memory.dmp

Filesize
64KB

Download
memory/1668-135-0x000001CB2DED0000-0x000001CB2DF20000-memory.dmp

Filesize
320KB

Download