gurcu | c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d

Resubmissions

10/04/2024, 02:41

240410-c6hmmsfd7z 10

10/04/2024, 02:41

10/04/2024, 02:41

10/04/2024, 02:41

14/10/2023, 01:33

Analysis

max time kernel
300s
max time network
305s
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, 02:41

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General

Target

x19a4f9f3d16fcc9779ba8ea79bf7.exe
Size

392KB
MD5

2299a17350433284e58bd0fcc10edf41
SHA1

d477f1cd55365db00ca77cc5459afabe1ffc80b3
SHA256

c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d
SHA512

123d18cf17b4bb0f0b16414039c2381f77e9f12c96a109d5847c760e4d7fb64f6c592f8f185a4c0375aade6754afd0abd6a196936adac405290f157829ae25a1
SSDEEP

6144:5cJGLvLE5hu6Me646G0D1ecme1x9b31v4n:uUvLr6k9b5ecmed1v4

Score

10^/10

gurcu collection spyware stealer

Malware Config

Extracted

Family

gurcu

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 12 IoCs

pid	Process
4160	x19a4f9f3d16fcc9779ba8ea79bf7.exe
4808	tor.exe
4980	x19a4f9f3d16fcc9779ba8ea79bf7.exe
5048	tor.exe
3364	x19a4f9f3d16fcc9779ba8ea79bf7.exe
432	tor.exe
4988	x19a4f9f3d16fcc9779ba8ea79bf7.exe
1832	tor.exe
424	x19a4f9f3d16fcc9779ba8ea79bf7.exe
2396	tor.exe
3756	x19a4f9f3d16fcc9779ba8ea79bf7.exe
432	tor.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 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-647252928-2816094679-1307623958-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Key opened	\REGISTRY\USER\S-1-5-21-647252928-2816094679-1307623958-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Key opened	\REGISTRY\USER\S-1-5-21-647252928-2816094679-1307623958-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.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
18	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
1020	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2284	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
4160	x19a4f9f3d16fcc9779ba8ea79bf7.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1052	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	4160	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	4980	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	3364	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	4988	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	424	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	3756	x19a4f9f3d16fcc9779ba8ea79bf7.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1052 wrote to memory of 872	1052	x19a4f9f3d16fcc9779ba8ea79bf7.exe	81
PID 1052 wrote to memory of 872	1052	x19a4f9f3d16fcc9779ba8ea79bf7.exe	81
PID 872 wrote to memory of 4916	872	cmd.exe	83
PID 872 wrote to memory of 4916	872	cmd.exe	83
PID 872 wrote to memory of 2284	872	cmd.exe	84
PID 872 wrote to memory of 2284	872	cmd.exe	84
PID 872 wrote to memory of 1020	872	cmd.exe	85
PID 872 wrote to memory of 1020	872	cmd.exe	85
PID 872 wrote to memory of 4160	872	cmd.exe	86
PID 872 wrote to memory of 4160	872	cmd.exe	86
PID 4160 wrote to memory of 4704	4160	x19a4f9f3d16fcc9779ba8ea79bf7.exe	87
PID 4160 wrote to memory of 4704	4160	x19a4f9f3d16fcc9779ba8ea79bf7.exe	87
PID 4160 wrote to memory of 4808	4160	x19a4f9f3d16fcc9779ba8ea79bf7.exe	89
PID 4160 wrote to memory of 4808	4160	x19a4f9f3d16fcc9779ba8ea79bf7.exe	89
PID 4980 wrote to memory of 5048	4980	x19a4f9f3d16fcc9779ba8ea79bf7.exe	93
PID 4980 wrote to memory of 5048	4980	x19a4f9f3d16fcc9779ba8ea79bf7.exe	93
PID 3364 wrote to memory of 432	3364	x19a4f9f3d16fcc9779ba8ea79bf7.exe	99
PID 3364 wrote to memory of 432	3364	x19a4f9f3d16fcc9779ba8ea79bf7.exe	99
PID 4988 wrote to memory of 1832	4988	x19a4f9f3d16fcc9779ba8ea79bf7.exe	104
PID 4988 wrote to memory of 1832	4988	x19a4f9f3d16fcc9779ba8ea79bf7.exe	104
PID 424 wrote to memory of 2396	424	x19a4f9f3d16fcc9779ba8ea79bf7.exe	109
PID 424 wrote to memory of 2396	424	x19a4f9f3d16fcc9779ba8ea79bf7.exe	109
PID 3756 wrote to memory of 432	3756	x19a4f9f3d16fcc9779ba8ea79bf7.exe	114
PID 3756 wrote to memory of 432	3756	x19a4f9f3d16fcc9779ba8ea79bf7.exe	114

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-1-5-21-647252928-2816094679-1307623958-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-647252928-2816094679-1307623958-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe

C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe
"C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1052
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "x19a4f9f3d16fcc9779ba8ea79bf7" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\x19a4f9f3d16fcc9779ba8ea79bf7.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:872
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4916
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2284
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "x19a4f9f3d16fcc9779ba8ea79bf7" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1020
- - C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.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:4160
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp81C3.tmp" -C "C:\Users\Admin\AppData\Local\xtioxntk7k"
      4⤵
      PID:4704
  - - C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
      "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:4808

C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4980
- C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
  "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:5048

C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3364
- C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
  "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:432

C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
  "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:1832

C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:424
- C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
  "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2396

C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3756
- C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe
  "C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:432

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

Credentials in Registry

T1552.002

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\x19a4f9f3d16fcc9779ba8ea79bf7.exe.log

Filesize
847B

MD5
486ebddc86ea8b3e965d390d22283a23

SHA1
eaffc047f067084867e8575c576a9ec60e094ba8

SHA256
50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d

SHA512
0a50ba02250b38355a6f4fb94e40c61258a74031d9aea7cdf675f3e068f39ec0748ecf292aaf2f94b1963b9d66516ee79aa6c552617048e248774af0ff07189d

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe

Filesize
392KB

MD5
2299a17350433284e58bd0fcc10edf41

SHA1
d477f1cd55365db00ca77cc5459afabe1ffc80b3

SHA256
c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d

SHA512
123d18cf17b4bb0f0b16414039c2381f77e9f12c96a109d5847c760e4d7fb64f6c592f8f185a4c0375aade6754afd0abd6a196936adac405290f157829ae25a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp81C3.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\xtioxntk7k\data\cached-microdesc-consensus

Filesize
2.7MB

MD5
a0db8a87f7b723266c8b04255da46b06

SHA1
4df00ea56d22d88f3d2e005ef66bad5b3ef92ebf

SHA256
60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3

SHA512
41b8fc467d11af7ca6a42c7e94d1b8295ab3ae5d6d186b4f378e6e079440520e8324b695da1134beb2bc1697d2491edcc70c1b75ab6fc66b9c1cb2ecbcdb4a7d

Download Submit
C:\Users\Admin\AppData\Local\xtioxntk7k\data\cached-microdescs.new

Filesize
8.4MB

MD5
0952a8705afa7f027d1ffbd69e39abf7

SHA1
ab61d8104c5d9c2c138163d8a58deef787ea2ef5

SHA256
b8c75ca17a79f3c95bd9aa1c7dd637647c67b78fa5e4f2d651121f84f3dfc835

SHA512
608f6707ae1e48ba1d707d3f874590c97a24309c33b1032d2f7bc74f6bfdeecc840467270988bfabe803984141c50f624b944937b060eb0f4a72d1ae1af78fb7

Download Submit
C:\Users\Admin\AppData\Local\xtioxntk7k\host\hostname

Filesize
64B

MD5
03dcf5f5cdf990737b8aebe998025dd1

SHA1
5cea26039b79bc95763ae7c3c4d6b49a250144fe

SHA256
ade34f1def90b849b72827918510d551089bc351852cc44bbc2b99fb9943de75

SHA512
3bdcda39efa810cdb4e4a7d314a973507bcb25c2d99a813aac6950ecfc9d7dc751b2720ee458874697d5ab394d8cc8b60fed5962b98a1926e1d2cc552e1c97d4

Download Submit
C:\Users\Admin\AppData\Local\xtioxntk7k\port.dat

Filesize
4B

MD5
9a86d531e19ec6f5937ad1373bb118bd

SHA1
9491531157806078a1ce2da9ab6ff7e33761d86f

SHA256
b8e5918871d490fedab8e3b8de116e80b2cdd5c5b3027d927853cea5b279d19d

SHA512
75093d0afd2265b66dfda5c4dac853b7c703594411d67c83f8f420994005bf2078061fe7219fe7682ebb40951dbb488f8c9d627520e783dced24a6afd879f9cc

Download Submit
C:\Users\Admin\AppData\Local\xtioxntk7k\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\xtioxntk7k\torrc.txt

Filesize
218B

MD5
51ffb85541f98f1bb444875dd66eacfc

SHA1
3faac1a020f8f35889529baca1bffd373c9a7b83

SHA256
a9ec09359c190fc186eecff5ec3a8f796ac5e6d9d196c867c0fa4941de24a8e4

SHA512
693c9910cf81f4265678f9aa9648d1b867947634613f726d37947cee1e9020fc452cf1cc7bbf2adc6224a91bc10f3e287b30875f3f98d1241ecabe325bb4e613

Download Submit
memory/424-111-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/424-109-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/1052-0-0x0000015CA5AA0000-0x0000015CA5B08000-memory.dmp

Filesize
416KB

Download
memory/1052-6-0x00007FF9929D0000-0x00007FF993492000-memory.dmp

Filesize
10.8MB

Download
memory/1052-2-0x0000015CC02E0000-0x0000015CC02F0000-memory.dmp

Filesize
64KB

Download
memory/1052-1-0x00007FF9929D0000-0x00007FF993492000-memory.dmp

Filesize
10.8MB

Download
memory/3364-93-0x000001BBA49D0000-0x000001BBA49E0000-memory.dmp

Filesize
64KB

Download
memory/3364-95-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/3364-92-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/3756-123-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/3756-121-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/4160-12-0x000001FA1FEC0000-0x000001FA1FED0000-memory.dmp

Filesize
64KB

Download
memory/4160-76-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/4160-11-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/4980-86-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/4980-84-0x00000168A7320000-0x00000168A7330000-memory.dmp

Filesize
64KB

Download
memory/4980-82-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/4988-105-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download
memory/4988-107-0x00007FF991CF0000-0x00007FF9927B2000-memory.dmp

Filesize
10.8MB

Download