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
9s
max time network
12s
platform
windows7_x64
resource
win7-20240319-en
resource tags

arch:x64arch:x86image:win7-20240319-enlocale:en-usos:windows7-x64system
submitted
10/04/2024, 02:58

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General

Target
loader.exe
Size 401KB
Sample240410-dgnm2aff7x
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

Deletes itself 1 IoCs

pid	Process
3056	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2520	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
2512	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
2516	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	loader.exe
Token: SeDebugPrivilege	2520	loader.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2188 wrote to memory of 3056	2188	loader.exe	28
PID 2188 wrote to memory of 3056	2188	loader.exe	28
PID 2188 wrote to memory of 3056	2188	loader.exe	28
PID 3056 wrote to memory of 2324	3056	cmd.exe	30
PID 3056 wrote to memory of 2324	3056	cmd.exe	30
PID 3056 wrote to memory of 2324	3056	cmd.exe	30
PID 3056 wrote to memory of 2516	3056	cmd.exe	31
PID 3056 wrote to memory of 2516	3056	cmd.exe	31
PID 3056 wrote to memory of 2516	3056	cmd.exe	31
PID 3056 wrote to memory of 2512	3056	cmd.exe	32
PID 3056 wrote to memory of 2512	3056	cmd.exe	32
PID 3056 wrote to memory of 2512	3056	cmd.exe	32
PID 3056 wrote to memory of 2520	3056	cmd.exe	33
PID 3056 wrote to memory of 2520	3056	cmd.exe	33
PID 3056 wrote to memory of 2520	3056	cmd.exe	33

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:2188
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:3056
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2324
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2516
- - 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:2512
- - 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:2520

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

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

Submit Download

memory/2188-0-0x0000000001090000-0x00000000010F8000-memory.dmp

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memory/2188-1-0x000007FEF5CA0000-0x000007FEF668C000-memory.dmp

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memory/2188-2-0x000000001B1A0000-0x000000001B220000-memory.dmp

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memory/2188-5-0x000007FEF5CA0000-0x000007FEF668C000-memory.dmp

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memory/2520-9-0x00000000000C0000-0x0000000000128000-memory.dmp

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memory/2520-10-0x000007FEF52B0000-0x000007FEF5C9C000-memory.dmp

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memory/2520-11-0x000000001B1F0000-0x000000001B270000-memory.dmp

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