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
149s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
14-10-2023 01:33

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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

Checks computer location settings 2 TTPs 3 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-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation	x19a4f9f3d16fcc9779ba8ea79bf7.exe

Executes dropped EXE 5 IoCs

pid	Process
3372	x19a4f9f3d16fcc9779ba8ea79bf7.exe
1932	x19a4f9f3d16fcc9779ba8ea79bf7.exe
3136	tor.exe
1152	x19a4f9f3d16fcc9779ba8ea79bf7.exe
4920	tor.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-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe

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
428	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4124	PING.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3372	x19a4f9f3d16fcc9779ba8ea79bf7.exe
3372	x19a4f9f3d16fcc9779ba8ea79bf7.exe
1152	x19a4f9f3d16fcc9779ba8ea79bf7.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1956	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	3372	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	1932	x19a4f9f3d16fcc9779ba8ea79bf7.exe
Token: SeDebugPrivilege	1152	x19a4f9f3d16fcc9779ba8ea79bf7.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3372	x19a4f9f3d16fcc9779ba8ea79bf7.exe
1152	x19a4f9f3d16fcc9779ba8ea79bf7.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 4428	1956	x19a4f9f3d16fcc9779ba8ea79bf7.exe	87
PID 1956 wrote to memory of 4428	1956	x19a4f9f3d16fcc9779ba8ea79bf7.exe	87
PID 4428 wrote to memory of 4908	4428	cmd.exe	88
PID 4428 wrote to memory of 4908	4428	cmd.exe	88
PID 4428 wrote to memory of 4124	4428	cmd.exe	89
PID 4428 wrote to memory of 4124	4428	cmd.exe	89
PID 4428 wrote to memory of 428	4428	cmd.exe	91
PID 4428 wrote to memory of 428	4428	cmd.exe	91
PID 4428 wrote to memory of 3372	4428	cmd.exe	92
PID 4428 wrote to memory of 3372	4428	cmd.exe	92
PID 3372 wrote to memory of 3092	3372	x19a4f9f3d16fcc9779ba8ea79bf7.exe	95
PID 3372 wrote to memory of 3092	3372	x19a4f9f3d16fcc9779ba8ea79bf7.exe	95
PID 3372 wrote to memory of 3136	3372	x19a4f9f3d16fcc9779ba8ea79bf7.exe	99
PID 3372 wrote to memory of 3136	3372	x19a4f9f3d16fcc9779ba8ea79bf7.exe	99
PID 1152 wrote to memory of 4920	1152	x19a4f9f3d16fcc9779ba8ea79bf7.exe	107
PID 1152 wrote to memory of 4920	1152	x19a4f9f3d16fcc9779ba8ea79bf7.exe	107

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-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	x19a4f9f3d16fcc9779ba8ea79bf7.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\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⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1956
- 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:4428
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4908
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4124
- - 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:428
- - C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    - outlook_win_path
    PID:3372
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp141F.tmp" -C "C:\Users\Admin\AppData\Local\xtioxntk7k"
      4⤵
      PID:3092
  - - 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:3136

C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1932

C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
C:\Users\Admin\AppData\Local\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1152
- 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:4920

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\x19a4f9f3d16fcc9779ba8ea79bf7.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

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\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe

Filesize
392KB

MD5
2299a17350433284e58bd0fcc10edf41

SHA1
d477f1cd55365db00ca77cc5459afabe1ffc80b3

SHA256
c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d

SHA512
123d18cf17b4bb0f0b16414039c2381f77e9f12c96a109d5847c760e4d7fb64f6c592f8f185a4c0375aade6754afd0abd6a196936adac405290f157829ae25a1

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\TeamViewer\x19a4f9f3d16fcc9779ba8ea79bf7.exe

Filesize
392KB

MD5
2299a17350433284e58bd0fcc10edf41

SHA1
d477f1cd55365db00ca77cc5459afabe1ffc80b3

SHA256
c3439dd56bcf3921cdbfcbdff3f928d14ebd632b3411235657bf9f5452c1ab9d

SHA512
123d18cf17b4bb0f0b16414039c2381f77e9f12c96a109d5847c760e4d7fb64f6c592f8f185a4c0375aade6754afd0abd6a196936adac405290f157829ae25a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp141F.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

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

Filesize
2.7MB

MD5
b3ef94a3423ec1d2c0b63d3eff9c9fff

SHA1
74ba4b10cfb9ca4ee1b3c6bc318a5c765cf49df2

SHA256
8e17bbec63e22d1c3874023ba932ea3e03dbcc8116925fe893ff479d4bcfd9f1

SHA512
f6f1a685cb0844f82152da13f86042f8bd321f73cc0742c96cc8e14a55c53a9dd0cc227249f9bb60899d911e31ae4b28f72345957390e3a5c006e22cd57a6742

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

Filesize
17.6MB

MD5
38c22e6f9ed628053ead296182d952ac

SHA1
28e03e5d648c0fcccc720b45d2ac45b1ba0e1af9

SHA256
836132fe182279e1ac22b570bfc38dbcfbf346d756151e4514fd478a753e9ec6

SHA512
2deeb260f49cbb3b76a6e4ef27bad5461f5ff6155aa60566705d6d0400bca818d5b1b21d3cf1fcddab5bd2df64a3a2cdd931a7cbb11d21e2cc78382ae8463b8f

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

Filesize
64B

MD5
a8b78779e95434dc06a80c76f4b0da9c

SHA1
3db8aff20ce23ebd9ae3a3d54b2febf69b1be486

SHA256
5eca0d53e44f57eb9d238044ce9b25429e714cdb98a59bc30a5a3d54b0952f12

SHA512
3e887d61f4a8f585000f42d6903c4eaefb68146329e578cb3a28bcf97c1f5bae6c1580a31797497154b1d4cfec52fdbcc2f011087f78842ca3a222c133075715

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

Filesize
4B

MD5
3a24b25a7b092a252166a1641ae953e7

SHA1
570a3e528618d879ad7ec0179beb7b3dede2d331

SHA256
f18af665c04861d0e2d82a1fd57687173267c064b089c264caaef3359daf7372

SHA512
ed7b3018966f3dd044b570750a3fc268a154c9ae27bcf19d1a65f54c00e3ae9f1befa3ea84214c9d3760b07ec16a9ca1ca844f36e45c95ede8f078c0d34071c3

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\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

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
60018be57cd1d65d3da55194bb572159

SHA1
07dd761fa81f85b90d5464ad6d57b1f111b081a6

SHA256
88a6ac7da833cff73111b4e282602144ff29eb4e8778ae5a67aee93a2f345490

SHA512
37cf9cd9fc189d05969ceff36dd33da34c6320e2d7e5fa74e02576e1d71a436934d21c321cf109577e33cae14d2a8e3870e38d3dcc83845fa9e64b55e994eadf

Download Submit
memory/1152-84-0x00007FF9A5FC0000-0x00007FF9A6A81000-memory.dmp

Filesize
10.8MB

Download
memory/1152-81-0x000001D45D210000-0x000001D45D220000-memory.dmp

Filesize
64KB

Download
memory/1152-80-0x00007FF9A5FC0000-0x00007FF9A6A81000-memory.dmp

Filesize
10.8MB

Download
memory/1152-85-0x000001D45D210000-0x000001D45D220000-memory.dmp

Filesize
64KB

Download
memory/1152-91-0x00007FF9A5FC0000-0x00007FF9A6A81000-memory.dmp

Filesize
10.8MB

Download
memory/1932-19-0x00007FF9A5FC0000-0x00007FF9A6A81000-memory.dmp

Filesize
10.8MB

Download
memory/1932-18-0x00007FF9A5FC0000-0x00007FF9A6A81000-memory.dmp

Filesize
10.8MB

Download
memory/1956-1-0x00007FF9A5FC0000-0x00007FF9A6A81000-memory.dmp

Filesize
10.8MB

Download
memory/1956-6-0x00007FF9A5FC0000-0x00007FF9A6A81000-memory.dmp

Filesize
10.8MB

Download
memory/1956-0-0x00000218E7410000-0x00000218E7478000-memory.dmp

Filesize
416KB

Download
memory/1956-2-0x00000218E9980000-0x00000218E9990000-memory.dmp

Filesize
64KB

Download
memory/3372-17-0x00000126A30B0000-0x00000126A30C0000-memory.dmp

Filesize
64KB

Download
memory/3372-14-0x00007FF9A5FC0000-0x00007FF9A6A81000-memory.dmp

Filesize
10.8MB

Download
memory/3372-12-0x00000126A30B0000-0x00000126A30C0000-memory.dmp

Filesize
64KB

Download
memory/3372-11-0x00007FF9A5FC0000-0x00007FF9A6A81000-memory.dmp

Filesize
10.8MB

Download