gurcu | 44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31

General

Target

B9a5797cb584014f3fede.exe
Size

530KB
MD5

862e7aeb18ba5892f51b5712a213a614
SHA1

99d86e4247f52c3ea9b2bb476af66dfc7707fa8d
SHA256

44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31
SHA512

678fc8fb5dc887f41db90e6341229ce35c830ffac4cbb91ea669ab5e8bc849bae05c15909ae62e4dfd3a249bb2ff062eaa0e256989fe203863db0396c60ec713
SSDEEP

6144:XHClm6SWPoK5Z0EwVSmRPQd/t/a2zDGVPJXvnzZjDJHb571Kjn1929XDccHd8JyO:XHCnZxb88RatpvnzZjDv7oj19yTNTY

Score

10^/10

gurcu collection spyware stealer

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6176004110:AAFKA5be4dMwA848HWxzYIzrzzOGIHMOJGc/sendMessage?chat_id=615133582

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu

Executes dropped EXE 2 IoCs

pid	Process
5100	B9a5797cb584014f3fede.exe
3480	B9a5797cb584014f3fede.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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 6 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2768987046-1485460554-1347040953-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-2768987046-1485460554-1347040953-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-2768987046-1485460554-1347040953-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-2768987046-1485460554-1347040953-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-2768987046-1485460554-1347040953-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-2768987046-1485460554-1347040953-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe

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
23	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
4284	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4656	PING.EXE

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4508	B9a5797cb584014f3fede.exe
Token: SeDebugPrivilege	5100	B9a5797cb584014f3fede.exe
Token: SeDebugPrivilege	3480	B9a5797cb584014f3fede.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4508 wrote to memory of 3740	4508	B9a5797cb584014f3fede.exe	72
PID 4508 wrote to memory of 3740	4508	B9a5797cb584014f3fede.exe	72
PID 3740 wrote to memory of 2168	3740	cmd.exe	74
PID 3740 wrote to memory of 2168	3740	cmd.exe	74
PID 3740 wrote to memory of 4656	3740	cmd.exe	75
PID 3740 wrote to memory of 4656	3740	cmd.exe	75
PID 3740 wrote to memory of 4284	3740	cmd.exe	76
PID 3740 wrote to memory of 4284	3740	cmd.exe	76
PID 3740 wrote to memory of 5100	3740	cmd.exe	77
PID 3740 wrote to memory of 5100	3740	cmd.exe	77

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-1-5-21-2768987046-1485460554-1347040953-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2768987046-1485460554-1347040953-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe

C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe
"C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4508
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "B9a5797cb584014f3fede" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\B9a5797cb584014f3fede.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3740
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2168
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4656
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "B9a5797cb584014f3fede" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4284
- - C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
    "C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious use of AdjustPrivilegeToken
    PID:5100

C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
1⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:3480

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Unsecured Credentials

2

T1552

Credentials In Files

1

T1552.001

Credentials in Registry

1

T1552.002

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\B9a5797cb584014f3fede.exe.log

Filesize
847B

MD5
a908a7c6e93edeb3e400780b6fe62dde

SHA1
36e2b437f41443f6b41b45b35a0f97b2cd94123d

SHA256
cae801b0499949178298c1c1a083f7c0febb971d262be9c9588437af66c76ef0

SHA512
deb437dcb1440d37bcd61dfa43be05fd01856a1d1e59aa5b2dfa142e9ae584b0577eea024edb99d8e74e3a1b606bb7ae3b4f9cd8eb30813e67dda678b9319cbe

Download Submit
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe

Filesize
530KB

MD5
862e7aeb18ba5892f51b5712a213a614

SHA1
99d86e4247f52c3ea9b2bb476af66dfc7707fa8d

SHA256
44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31

SHA512
678fc8fb5dc887f41db90e6341229ce35c830ffac4cbb91ea669ab5e8bc849bae05c15909ae62e4dfd3a249bb2ff062eaa0e256989fe203863db0396c60ec713

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\port.dat

Filesize
4B

MD5
8fdd149fcaa7058caccc9c4ad5b0d89a

SHA1
fac4199dca4b2ffef7b038c03c3416909c34d7d1

SHA256
b6cbf3829f323ff95219b019c64797845ad48a594f70b8dfc63ceaa48b6353e2

SHA512
61dfa25cc036697f426d10d1364f9d436daed3c900b1444ce497105db7d3e9dfeaeddc251bce41ed4bb13503d564c79c0beb5f324f1f3c4c02862a17369e6f68

Download Submit
memory/3480-23-0x0000014639890000-0x00000146398A0000-memory.dmp

Filesize
64KB

Download
memory/3480-22-0x00007FFC96B30000-0x00007FFC9751C000-memory.dmp

Filesize
9.9MB

Download
memory/3480-20-0x0000014639890000-0x00000146398A0000-memory.dmp

Filesize
64KB

Download
memory/3480-18-0x00007FFC96B30000-0x00007FFC9751C000-memory.dmp

Filesize
9.9MB

Download
memory/4508-1-0x00007FFC96B30000-0x00007FFC9751C000-memory.dmp

Filesize
9.9MB

Download
memory/4508-4-0x000001E97E8E0000-0x000001E97E8F0000-memory.dmp

Filesize
64KB

Download
memory/4508-6-0x00007FFC96B30000-0x00007FFC9751C000-memory.dmp

Filesize
9.9MB

Download
memory/4508-0-0x000001E97CC00000-0x000001E97CC8A000-memory.dmp

Filesize
552KB

Download
memory/5100-11-0x00007FFC96B30000-0x00007FFC9751C000-memory.dmp

Filesize
9.9MB

Download
memory/5100-16-0x0000024F71090000-0x0000024F710A0000-memory.dmp

Filesize
64KB

Download
memory/5100-15-0x00007FFC96B30000-0x00007FFC9751C000-memory.dmp

Filesize
9.9MB

Download
memory/5100-12-0x0000024F71090000-0x0000024F710A0000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads