gurcu | d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f | Triage™

Resubmissions

10/04/2024, 02:38

240410-c4pceacb2410

10/04/2024, 02:37

240410-c4ne4scb2310

10/04/2024, 02:37

240410-c4llhsca9910

10/04/2024, 02:37

240410-c4jf6aca9810

14/10/2023, 01:31

231014-bxezqahg8w10

Analysis

max time kernel
4s
max time network
1735s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
10/04/2024, 02:38

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General

Target
k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Size 339KB
Sample240410-c4pceacb24
SHA256 d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f
MD5 1cab66a5c15f97f040fb23d354d04a9c
SHA1 f0dbebd22b2c7bfedbefa4435b345c58416f9448
SHA512 a5508a75a0a7c747cc50fe8284b9097e1cb9ae83bd7e80553ffa875a6d07d6eec7fc18f66a0a328aa0614c26642d884bfe152e6c09a11eeb0d64f6be66064eab
SSDEEP 3072:gdrpN/JlLKd5hkad0lk0vGJGMlngDBXrkhamyeFykt9sxc8eTRLUvenjLM/zNlgl:0UGPUvva+lxXY6uXAJMI9bAV0D
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gurcu 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
1508	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.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
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
4008	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
784	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	564	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	1508	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 564 wrote to memory of 220	564	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	78
PID 564 wrote to memory of 220	564	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	78
PID 220 wrote to memory of 4316	220	cmd.exe	80
PID 220 wrote to memory of 4316	220	cmd.exe	80
PID 220 wrote to memory of 784	220	cmd.exe	81
PID 220 wrote to memory of 784	220	cmd.exe	81
PID 220 wrote to memory of 4008	220	cmd.exe	82
PID 220 wrote to memory of 4008	220	cmd.exe	82
PID 220 wrote to memory of 1508	220	cmd.exe	83
PID 220 wrote to memory of 1508	220	cmd.exe	83

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

C:\Users\Admin\AppData\Local\Temp\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
"C:\Users\Admin\AppData\Local\Temp\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:564
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "k2fef4820980d3c2c1f2cce2f95e94f5e1c18" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:220
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4316
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:784
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "k2fef4820980d3c2c1f2cce2f95e94f5e1c18" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4008
- - C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1508

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

Discovery

Query Registry

Remote System Discovery

System Information Discovery

Lateral Movement

Collection

Data from Local System

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe.log
Size 847B
SHA256 50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d
MD5 486ebddc86ea8b3e965d390d22283a23
SHA1 eaffc047f067084867e8575c576a9ec60e094ba8
SHA512 0a50ba02250b38355a6f4fb94e40c61258a74031d9aea7cdf675f3e068f39ec0748ecf292aaf2f94b1963b9d66516ee79aa6c552617048e248774af0ff07189d
MD5 SHA1 SHA512

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k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Path C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Size 339KB
SHA256 d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f
MD5 1cab66a5c15f97f040fb23d354d04a9c
SHA1 f0dbebd22b2c7bfedbefa4435b345c58416f9448
SHA512 a5508a75a0a7c747cc50fe8284b9097e1cb9ae83bd7e80553ffa875a6d07d6eec7fc18f66a0a328aa0614c26642d884bfe152e6c09a11eeb0d64f6be66064eab
SSDEEP 3072:gdrpN/JlLKd5hkad0lk0vGJGMlngDBXrkhamyeFykt9sxc8eTRLUvenjLM/zNlgl:0UGPUvva+lxXY6uXAJMI9bAV0D
MD5 SHA1 SHA512 SSDEEP

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memory/564-0-0x000001E825150000-0x000001E8251AC000-memory.dmp

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memory/564-1-0x00007FFBB7BE0000-0x00007FFBB86A2000-memory.dmp

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memory/564-4-0x000001E83F640000-0x000001E83F650000-memory.dmp

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memory/564-6-0x00007FFBB7BE0000-0x00007FFBB86A2000-memory.dmp

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memory/1508-11-0x00007FFBB7BE0000-0x00007FFBB86A2000-memory.dmp

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memory/1508-12-0x000002258B3C0000-0x000002258B3D0000-memory.dmp

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