gurcu | 8d647fd3ebb00c9d853eb728ff7cba75b7a089d30f84090e3bc1dc460bdd47f3 | Triage™

Resubmissions

10/04/2024, 02:58

240410-dgn9kacd4610

10/04/2024, 02:58

240410-dgnm2aff7x10

10/04/2024, 02:58

240410-dgnb9sff7w10

10/04/2024, 02:58

240410-dgm2haff7v10

23/08/2023, 14:58

230823-sb7laaed4110

Analysis

max time kernel
7s
max time network
255s
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, 02:58

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General

Target
loader.exe
Size 401KB
Sample240410-dgm2haff7v
SHA256 8d647fd3ebb00c9d853eb728ff7cba75b7a089d30f84090e3bc1dc460bdd47f3
MD5 69e3cdc923b668aec4cb405c040565c6
SHA1 6a675ebf6f241e543f7bb50ccc8ead462a427880
SHA512 5580919f6710fc210f079875eae22a87c85e854b57f59d10fc22680460f370154d7d223a66c9797387e4675a7954ba6f051a34571499481927980eb9ebf07cdb
SSDEEP 6144:+CGmWI/2hvRn6Ie646G0D1eBlxy9bAmI6:+KWI/8B6Q9b5eBlxnmI6
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
4516	loader.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
1996	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
3792	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	228	loader.exe
Token: SeDebugPrivilege	4516	loader.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 228 wrote to memory of 4664	228	loader.exe	74
PID 228 wrote to memory of 4664	228	loader.exe	74
PID 4664 wrote to memory of 4496	4664	cmd.exe	76
PID 4664 wrote to memory of 4496	4664	cmd.exe	76
PID 4664 wrote to memory of 3792	4664	cmd.exe	77
PID 4664 wrote to memory of 3792	4664	cmd.exe	77
PID 4664 wrote to memory of 1996	4664	cmd.exe	78
PID 4664 wrote to memory of 1996	4664	cmd.exe	78
PID 4664 wrote to memory of 4516	4664	cmd.exe	79
PID 4664 wrote to memory of 4516	4664	cmd.exe	79

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\loader.exe
"C:\Users\Admin\AppData\Local\Temp\loader.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:228
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "loader" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\loader.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\loader.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\loader.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4664
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4496
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:3792
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "loader" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\loader.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1996
- - C:\Users\Admin\AppData\Local\TeamViewer\loader.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\loader.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4516

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

loader.exe.log

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

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loader.exe

Path C:\Users\Admin\AppData\Local\TeamViewer\loader.exe
Size 401KB
SHA256 8d647fd3ebb00c9d853eb728ff7cba75b7a089d30f84090e3bc1dc460bdd47f3
MD5 69e3cdc923b668aec4cb405c040565c6
SHA1 6a675ebf6f241e543f7bb50ccc8ead462a427880
SHA512 5580919f6710fc210f079875eae22a87c85e854b57f59d10fc22680460f370154d7d223a66c9797387e4675a7954ba6f051a34571499481927980eb9ebf07cdb
SSDEEP 6144:+CGmWI/2hvRn6Ie646G0D1eBlxy9bAmI6:+KWI/8B6Q9b5eBlxnmI6
MD5 SHA1 SHA512 SSDEEP

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memory/228-0-0x0000027828D50000-0x0000027828DB8000-memory.dmp

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memory/228-1-0x00007FF911870000-0x00007FF91225C000-memory.dmp

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memory/228-2-0x0000027843250000-0x0000027843260000-memory.dmp

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memory/228-6-0x00007FF911870000-0x00007FF91225C000-memory.dmp

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memory/4516-11-0x00007FF911870000-0x00007FF91225C000-memory.dmp

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memory/4516-12-0x000001E27EB50000-0x000001E27EB60000-memory.dmp

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