gurcu | 44eca198c64197c511441f644895afd6a2777c28bcb6a376d4d4623b030ced31

Resubmissions

10-04-2024 02:49

240410-da1n1sfe7v 10

10-04-2024 02:49

10-04-2024 02:48

10-04-2024 02:48

14-10-2023 03:45

Analysis

max time kernel
288s
max time network
304s
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 02:48

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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 discovery spyware stealer

Malware Config

Extracted

Family

gurcu

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 11 IoCs

pid	Process
2144	B9a5797cb584014f3fede.exe
1608	tor.exe
4152	B9a5797cb584014f3fede.exe
328	tor.exe
2372	B9a5797cb584014f3fede.exe
2044	tor.exe
3284	B9a5797cb584014f3fede.exe
3860	tor.exe
3396	B9a5797cb584014f3fede.exe
888	tor.exe
2356	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-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.exe
Key opened	\REGISTRY\USER\S-1-5-21-627134735-902745853-4257352768-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	B9a5797cb584014f3fede.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
2	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
1144	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2888	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2144	B9a5797cb584014f3fede.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4892	B9a5797cb584014f3fede.exe
Token: SeDebugPrivilege	2144	B9a5797cb584014f3fede.exe
Token: SeDebugPrivilege	4152	B9a5797cb584014f3fede.exe
Token: SeDebugPrivilege	2372	B9a5797cb584014f3fede.exe
Token: SeDebugPrivilege	3284	B9a5797cb584014f3fede.exe
Token: SeDebugPrivilege	3396	B9a5797cb584014f3fede.exe
Token: SeDebugPrivilege	2356	B9a5797cb584014f3fede.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 4892 wrote to memory of 1908	4892	B9a5797cb584014f3fede.exe	80
PID 4892 wrote to memory of 1908	4892	B9a5797cb584014f3fede.exe	80
PID 1908 wrote to memory of 1044	1908	cmd.exe	82
PID 1908 wrote to memory of 1044	1908	cmd.exe	82
PID 1908 wrote to memory of 2888	1908	cmd.exe	83
PID 1908 wrote to memory of 2888	1908	cmd.exe	83
PID 1908 wrote to memory of 1144	1908	cmd.exe	84
PID 1908 wrote to memory of 1144	1908	cmd.exe	84
PID 1908 wrote to memory of 2144	1908	cmd.exe	85
PID 1908 wrote to memory of 2144	1908	cmd.exe	85
PID 2144 wrote to memory of 2288	2144	B9a5797cb584014f3fede.exe	87
PID 2144 wrote to memory of 2288	2144	B9a5797cb584014f3fede.exe	87
PID 2144 wrote to memory of 1608	2144	B9a5797cb584014f3fede.exe	89
PID 2144 wrote to memory of 1608	2144	B9a5797cb584014f3fede.exe	89
PID 4152 wrote to memory of 328	4152	B9a5797cb584014f3fede.exe	92
PID 4152 wrote to memory of 328	4152	B9a5797cb584014f3fede.exe	92
PID 2372 wrote to memory of 2044	2372	B9a5797cb584014f3fede.exe	98
PID 2372 wrote to memory of 2044	2372	B9a5797cb584014f3fede.exe	98
PID 3284 wrote to memory of 3860	3284	B9a5797cb584014f3fede.exe	103
PID 3284 wrote to memory of 3860	3284	B9a5797cb584014f3fede.exe	103
PID 3396 wrote to memory of 888	3396	B9a5797cb584014f3fede.exe	108
PID 3396 wrote to memory of 888	3396	B9a5797cb584014f3fede.exe	108

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	B9a5797cb584014f3fede.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	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:4892
- 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:1908
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1044
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2888
- - 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:1144
- - 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 behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2144
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp762A.tmp" -C "C:\Users\Admin\AppData\Local\gzrj1xdnai"
      4⤵
      PID:2288
  - - C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe
      "C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\gzrj1xdnai\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:1608

C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4152
- C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe
  "C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\gzrj1xdnai\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:328

C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2372
- C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe
  "C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\gzrj1xdnai\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2044

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
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:3284
- C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe
  "C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\gzrj1xdnai\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:3860

C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3396
- C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe
  "C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\gzrj1xdnai\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:888

C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
C:\Users\Admin\AppData\Local\Nvidia\B9a5797cb584014f3fede.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2356
- C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe
  "C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\gzrj1xdnai\torrc.txt"
  2⤵
  PID:1136

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\B9a5797cb584014f3fede.exe.log

Filesize
847B

MD5
486ebddc86ea8b3e965d390d22283a23

SHA1
eaffc047f067084867e8575c576a9ec60e094ba8

SHA256
50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d

SHA512
0a50ba02250b38355a6f4fb94e40c61258a74031d9aea7cdf675f3e068f39ec0748ecf292aaf2f94b1963b9d66516ee79aa6c552617048e248774af0ff07189d

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\Temp\tmp762A.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\data\cached-microdesc-consensus

Filesize
2.7MB

MD5
a0db8a87f7b723266c8b04255da46b06

SHA1
4df00ea56d22d88f3d2e005ef66bad5b3ef92ebf

SHA256
60b43cdce0f807f7891521f396f53def34a7d98986dbde0faa2a197189c587f3

SHA512
41b8fc467d11af7ca6a42c7e94d1b8295ab3ae5d6d186b4f378e6e079440520e8324b695da1134beb2bc1697d2491edcc70c1b75ab6fc66b9c1cb2ecbcdb4a7d

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\data\cached-microdescs.new

Filesize
9.0MB

MD5
8f5d630aaebc2e3bdda52588fe385c3f

SHA1
5fc0bca6aac9a4b109b5f31716198c52a29d471d

SHA256
118351def4f7524443a17ffae2017219b1e2215e50e4c40c7d257ca239ae1975

SHA512
63dadb74b50459d729572b323362ed6fb623ba5def5c815a70e993108401e6c0410d9063c0fc32dcef342080646f47a22b7cd7df37e0dc33601a6ec068481a3d

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\host\hostname

Filesize
64B

MD5
765140391a0ef343065a84e0ef6c62d7

SHA1
a7cf65a73a8b4dddcf0a9850bfe43708aba70096

SHA256
22267f31500eea6870feadcbc7a24195af072f601430d83401052eb5f96377ba

SHA512
98f7967ae5e6f6ab101ef36f33a2873481b89bae08716e09fcf7a31c94feb42272fc5edd89a2d53c0ed394d611d245ffac554a52e853f7080f85bb4fc72f3e84

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

Filesize
4B

MD5
99607461cdb9c26e2bd5f31b12dcf27a

SHA1
c5652b04914b88d8744be54b15f37015ffec9efd

SHA256
31c784955084f7758276ccd3d8746388c63eac05414ccf1891e481f89b3f59a1

SHA512
ef3ebc935c9bf2fdaffa55b2730d09ab928eba4f5a159312c82b9d389017dab73291a50afe39daef8bb3f65e085a30114b2ed7a041ed6f7f670714e64f935623

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\gzrj1xdnai\torrc.txt

Filesize
218B

MD5
89a32e783ba9bf7c9b6d21d7589c14dc

SHA1
fe5001d2a14116d866f6b23595fbe27c2a5fd5a1

SHA256
b9f48431e9d26c22b9730b4cec2295d75e9285f4e0bf80e0f55fa91dd406b186

SHA512
0a2945a070d55e41f0d2fb4421235abdf3b7b1b53475dfbecc614e2806ba050f3c37e237f246fc22a596a4db501a47e1f48a490f5b88bb39fae00907273280ff

Download Submit
memory/2144-12-0x00000233A1550000-0x00000233A1560000-memory.dmp

Filesize
64KB

Download
memory/2144-11-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/2144-59-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/2144-65-0x00000233A1550000-0x00000233A1560000-memory.dmp

Filesize
64KB

Download
memory/2356-120-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/2356-127-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/2356-121-0x0000022CC4700000-0x0000022CC4710000-memory.dmp

Filesize
64KB

Download
memory/2372-90-0x000001BC72500000-0x000001BC72510000-memory.dmp

Filesize
64KB

Download
memory/2372-92-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/2372-89-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/3284-102-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/3284-103-0x000001AA68130000-0x000001AA68140000-memory.dmp

Filesize
64KB

Download
memory/3284-105-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/3396-107-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/3396-108-0x00000270B52F0000-0x00000270B5300000-memory.dmp

Filesize
64KB

Download
memory/3396-110-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/4152-79-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/4152-76-0x000001D0FFF00000-0x000001D0FFF10000-memory.dmp

Filesize
64KB

Download
memory/4152-75-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/4892-0-0x000001EBD8500000-0x000001EBD858A000-memory.dmp

Filesize
552KB

Download
memory/4892-6-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download
memory/4892-2-0x000001EBF2B80000-0x000001EBF2B90000-memory.dmp

Filesize
64KB

Download
memory/4892-1-0x00007FFB9F930000-0x00007FFBA03F2000-memory.dmp

Filesize
10.8MB

Download