gurcu | d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f

Resubmissions

10-04-2024 02:38

240410-c4pceacb24 10

10-04-2024 02:37

10-04-2024 02:37

10-04-2024 02:37

14-10-2023 01:31

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 02:37

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Size

339KB
MD5

1cab66a5c15f97f040fb23d354d04a9c
SHA1

f0dbebd22b2c7bfedbefa4435b345c58416f9448
SHA256

d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f
SHA512

a5508a75a0a7c747cc50fe8284b9097e1cb9ae83bd7e80553ffa875a6d07d6eec7fc18f66a0a328aa0614c26642d884bfe152e6c09a11eeb0d64f6be66064eab
SSDEEP

3072:gdrpN/JlLKd5hkad0lk0vGJGMlngDBXrkhamyeFykt9sxc8eTRLUvenjLM/zNlgl:0UGPUvva+lxXY6uXAJMI9bAV0D

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
2256	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
2912	tor.exe
780	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
3980	tor.exe
2004	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
2668	tor.exe
1324	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
1400	tor.exe
920	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
2576	tor.exe
4048	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
3784	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-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key opened	\REGISTRY\USER\S-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key opened	\REGISTRY\USER\S-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.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
1	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
2344	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1308	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2256	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	244	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	2256	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	780	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	2004	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	1324	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	920	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	4048	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 244 wrote to memory of 5100	244	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	80
PID 244 wrote to memory of 5100	244	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	80
PID 5100 wrote to memory of 3948	5100	cmd.exe	82
PID 5100 wrote to memory of 3948	5100	cmd.exe	82
PID 5100 wrote to memory of 1308	5100	cmd.exe	83
PID 5100 wrote to memory of 1308	5100	cmd.exe	83
PID 5100 wrote to memory of 2344	5100	cmd.exe	84
PID 5100 wrote to memory of 2344	5100	cmd.exe	84
PID 5100 wrote to memory of 2256	5100	cmd.exe	85
PID 5100 wrote to memory of 2256	5100	cmd.exe	85
PID 2256 wrote to memory of 4112	2256	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	86
PID 2256 wrote to memory of 4112	2256	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	86
PID 2256 wrote to memory of 2912	2256	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	88
PID 2256 wrote to memory of 2912	2256	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	88
PID 780 wrote to memory of 3980	780	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	92
PID 780 wrote to memory of 3980	780	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	92
PID 2004 wrote to memory of 2668	2004	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	98
PID 2004 wrote to memory of 2668	2004	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	98
PID 1324 wrote to memory of 1400	1324	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	103
PID 1324 wrote to memory of 1400	1324	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	103
PID 920 wrote to memory of 2576	920	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	108
PID 920 wrote to memory of 2576	920	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	108
PID 4048 wrote to memory of 3784	4048	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	113
PID 4048 wrote to memory of 3784	4048	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	113

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-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

C:\Users\Admin\AppData\Local\Temp\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
"C:\Users\Admin\AppData\Local\Temp\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:244
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "k2fef4820980d3c2c1f2cce2f95e94f5e1c18" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5100
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3948
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:1308
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "k2fef4820980d3c2c1f2cce2f95e94f5e1c18" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2344
- - C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.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:2256
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp9124.tmp" -C "C:\Users\Admin\AppData\Local\lcybndk48g"
      4⤵
      PID:4112
  - - C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe
      "C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\lcybndk48g\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:2912

C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:780
- C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe
  "C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\lcybndk48g\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:3980

C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2004
- C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe
  "C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\lcybndk48g\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2668

C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1324
- C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe
  "C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\lcybndk48g\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:1400

C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:920
- C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe
  "C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\lcybndk48g\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2576

C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4048
- C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe
  "C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\lcybndk48g\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:3784

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe.log

Filesize
847B

MD5
486ebddc86ea8b3e965d390d22283a23

SHA1
eaffc047f067084867e8575c576a9ec60e094ba8

SHA256
50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d

SHA512
0a50ba02250b38355a6f4fb94e40c61258a74031d9aea7cdf675f3e068f39ec0748ecf292aaf2f94b1963b9d66516ee79aa6c552617048e248774af0ff07189d

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Filesize
339KB

MD5
1cab66a5c15f97f040fb23d354d04a9c

SHA1
f0dbebd22b2c7bfedbefa4435b345c58416f9448

SHA256
d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f

SHA512
a5508a75a0a7c747cc50fe8284b9097e1cb9ae83bd7e80553ffa875a6d07d6eec7fc18f66a0a328aa0614c26642d884bfe152e6c09a11eeb0d64f6be66064eab

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9124.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\data\cached-microdesc-consensus

Filesize
2.7MB

MD5
a0db8a87f7b723266c8b04255da46b06

SHA1
4df00ea56d22d88f3d2e005ef66bad5b3ef92ebf

SHA256
60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3

SHA512
41b8fc467d11af7ca6a42c7e94d1b8295ab3ae5d6d186b4f378e6e079440520e8324b695da1134beb2bc1697d2491edcc70c1b75ab6fc66b9c1cb2ecbcdb4a7d

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\data\cached-microdescs.new

Filesize
9.5MB

MD5
4d6c6207bb534581ad4792731e9ea998

SHA1
d17b68012d9458e72f7f116b384e258b33471c44

SHA256
627b41384dbf00956d7dbd26f6b2ddd89bf54a7cf4d017e5fa9d3c9e219e57c9

SHA512
7d9b05df03bf7621f3c570922e756155d571fabfa1fc5fa2356a131b733ebed71b08697dbdd281ece4cee629a2e56de868847be1b2f90a511a87ca0408e3907f

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\host\hostname

Filesize
64B

MD5
0ae35449385e9e2977d42aec46ee1f80

SHA1
7e70e2ed9159a5610570c58f09ccff767fe1637c

SHA256
859467118a996a5d24f6aec25d62f58b38b05430007ff02cb6e8aced7c532c17

SHA512
222506c613c7e9ac8ea869390659cbb2a1ebdb3dc8b9e9cec64727e08bcc58e3f96dac8c578cd738a9c8cb2c0f3af93ac6b18f65161dd8128c7dc6db6022c7a2

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\port.dat

Filesize
4B

MD5
485843481a7edacbfce101ecb1e4d2a8

SHA1
68cf3877bb4c5201c8a013851c1d7301b7816896

SHA256
5728c992e0c03fa48754a8636ffb192f1e2aa23f20be242c290d5eefd9b80182

SHA512
8a4f2bfc91147b1825c6eea8f92d1ae97834fbe10033e570a7b862dfdc5ba5bc8b33df5a62dc9f184ecdd33276af45667df805ff17791a56affa2f10df3518b9

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\torrc.txt

Filesize
218B

MD5
992e6b235da95a1ebe32fd3c077cf577

SHA1
624068c43ff7704930e3a32e98d33256a09839b6

SHA256
4bf74f12df627c9c41363c18b30549b1d2c810ad1b15f0f027bc5cf0ed4aa60f

SHA512
dd9eff1ba48d3bde177245ad6f789f6dcf058de6e6fa79e1b3ede0bc3c9035051c548bec2384e3738cb4fe18238306d61c431b548b9a67c84271ec72c7665bfc

Download Submit
memory/244-1-0x00007FF9BECB0000-0x00007FF9BF772000-memory.dmp

Filesize
10.8MB

Download
memory/244-2-0x000001EA79F50000-0x000001EA79F60000-memory.dmp

Filesize
64KB

Download
memory/244-0-0x000001EA77900000-0x000001EA7795C000-memory.dmp

Filesize
368KB

Download
memory/244-6-0x00007FF9BECB0000-0x00007FF9BF772000-memory.dmp

Filesize
10.8MB

Download
memory/780-76-0x000001DEDAEA0000-0x000001DEDAEB0000-memory.dmp

Filesize
64KB

Download
memory/780-83-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/780-75-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/920-114-0x0000022D4E470000-0x0000022D4E480000-memory.dmp

Filesize
64KB

Download
memory/920-113-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/920-116-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/1324-103-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/1324-101-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/2004-89-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/2004-91-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/2256-12-0x0000023461BC0000-0x0000023461BD0000-memory.dmp

Filesize
64KB

Download
memory/2256-73-0x0000023461BC0000-0x0000023461BD0000-memory.dmp

Filesize
64KB

Download
memory/2256-72-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/2256-11-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/4048-126-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download
memory/4048-128-0x00007FF9BEAE0000-0x00007FF9BF5A2000-memory.dmp

Filesize
10.8MB

Download