gurcu | dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129

Resubmissions

10-04-2024 02:52

240410-dcqxlaff2v 10

10-04-2024 02:52

10-04-2024 02:51

10-04-2024 02:51

14-10-2023 04:10

Analysis

max time kernel
299s
max time network
301s
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 02:51

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General

Target

f21559ac7c67d871d4f05.exe
Size

327KB
MD5

78fd6df30f791c7b5f45dca0b4c952a5
SHA1

d977ca82da0850eb5d4e69c9c657d1a41fb9c44d
SHA256

dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129
SHA512

abf0efb2412c522fbb7f6725a548e8d6a8bc045801a4dd8652a544a1527b99647140ad4843c41a6b00a728a5d8361c7e2ea80eba8ee3b291238729277dad228d
SSDEEP

6144:Vc6sWfGY/yODx332tOIXlU1QWZxXAnuHW9bbGDwVdqe1mM:Ps+CXIAuGG8dA

Score

10^/10

gurcu collection discovery spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot5968091729:AAHVag_ncx5c5AIYERGTqv9kr7clJT1_HDU/sendMessage?chat_id=-1001962300376

Signatures

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

Executes dropped EXE 12 IoCs

pid	Process
1564	f21559ac7c67d871d4f05.exe
2436	tor.exe
428	f21559ac7c67d871d4f05.exe
1040	tor.exe
3584	f21559ac7c67d871d4f05.exe
4608	tor.exe
3696	f21559ac7c67d871d4f05.exe
4384	tor.exe
5016	f21559ac7c67d871d4f05.exe
2624	tor.exe
2932	f21559ac7c67d871d4f05.exe
568	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-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	f21559ac7c67d871d4f05.exe
Key opened	\REGISTRY\USER\S-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	f21559ac7c67d871d4f05.exe
Key opened	\REGISTRY\USER\S-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	f21559ac7c67d871d4f05.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
4	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
2560	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3396	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1564	f21559ac7c67d871d4f05.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2112	f21559ac7c67d871d4f05.exe
Token: SeDebugPrivilege	1564	f21559ac7c67d871d4f05.exe
Token: SeDebugPrivilege	428	f21559ac7c67d871d4f05.exe
Token: SeDebugPrivilege	3584	f21559ac7c67d871d4f05.exe
Token: SeDebugPrivilege	3696	f21559ac7c67d871d4f05.exe
Token: SeDebugPrivilege	5016	f21559ac7c67d871d4f05.exe
Token: SeDebugPrivilege	2932	f21559ac7c67d871d4f05.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 4812	2112	f21559ac7c67d871d4f05.exe	78
PID 2112 wrote to memory of 4812	2112	f21559ac7c67d871d4f05.exe	78
PID 4812 wrote to memory of 3760	4812	cmd.exe	80
PID 4812 wrote to memory of 3760	4812	cmd.exe	80
PID 4812 wrote to memory of 3396	4812	cmd.exe	81
PID 4812 wrote to memory of 3396	4812	cmd.exe	81
PID 4812 wrote to memory of 2560	4812	cmd.exe	82
PID 4812 wrote to memory of 2560	4812	cmd.exe	82
PID 4812 wrote to memory of 1564	4812	cmd.exe	83
PID 4812 wrote to memory of 1564	4812	cmd.exe	83
PID 1564 wrote to memory of 720	1564	f21559ac7c67d871d4f05.exe	85
PID 1564 wrote to memory of 720	1564	f21559ac7c67d871d4f05.exe	85
PID 1564 wrote to memory of 2436	1564	f21559ac7c67d871d4f05.exe	87
PID 1564 wrote to memory of 2436	1564	f21559ac7c67d871d4f05.exe	87
PID 428 wrote to memory of 1040	428	f21559ac7c67d871d4f05.exe	90
PID 428 wrote to memory of 1040	428	f21559ac7c67d871d4f05.exe	90
PID 3584 wrote to memory of 4608	3584	f21559ac7c67d871d4f05.exe	96
PID 3584 wrote to memory of 4608	3584	f21559ac7c67d871d4f05.exe	96
PID 3696 wrote to memory of 4384	3696	f21559ac7c67d871d4f05.exe	101
PID 3696 wrote to memory of 4384	3696	f21559ac7c67d871d4f05.exe	101
PID 5016 wrote to memory of 2624	5016	f21559ac7c67d871d4f05.exe	106
PID 5016 wrote to memory of 2624	5016	f21559ac7c67d871d4f05.exe	106
PID 2932 wrote to memory of 568	2932	f21559ac7c67d871d4f05.exe	111
PID 2932 wrote to memory of 568	2932	f21559ac7c67d871d4f05.exe	111

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-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	f21559ac7c67d871d4f05.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2930051783-2551506282-3430162621-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	f21559ac7c67d871d4f05.exe

C:\Users\Admin\AppData\Local\Temp\f21559ac7c67d871d4f05.exe
"C:\Users\Admin\AppData\Local\Temp\f21559ac7c67d871d4f05.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "f21559ac7c67d871d4f05" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\f21559ac7c67d871d4f05.exe" &&START "" "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4812
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3760
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:3396
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "f21559ac7c67d871d4f05" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2560
- - C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
    "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.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:1564
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp4788.tmp" -C "C:\Users\Admin\AppData\Local\z1jp774dks"
      4⤵
      PID:720
  - - C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
      "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:2436

C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:428
- C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
  "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:1040

C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3584
- C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
  "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:4608

C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3696
- C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
  "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:4384

C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
  "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:2624

C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe
  "C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt"
  2⤵
  - Executes dropped EXE
  PID:568

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\f21559ac7c67d871d4f05.exe.log

Filesize
847B

MD5
486ebddc86ea8b3e965d390d22283a23

SHA1
eaffc047f067084867e8575c576a9ec60e094ba8

SHA256
50a57273ecb794e53b0622eb841341e2643c11f53fa47356e6e754ab2268171d

SHA512
0a50ba02250b38355a6f4fb94e40c61258a74031d9aea7cdf675f3e068f39ec0748ecf292aaf2f94b1963b9d66516ee79aa6c552617048e248774af0ff07189d

Download Submit
C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe

Filesize
327KB

MD5
78fd6df30f791c7b5f45dca0b4c952a5

SHA1
d977ca82da0850eb5d4e69c9c657d1a41fb9c44d

SHA256
dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129

SHA512
abf0efb2412c522fbb7f6725a548e8d6a8bc045801a4dd8652a544a1527b99647140ad4843c41a6b00a728a5d8361c7e2ea80eba8ee3b291238729277dad228d

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp4788.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

Download Submit
C:\Users\Admin\AppData\Local\z1jp774dks\data\cached-microdesc-consensus

Filesize
2.7MB

MD5
814f8cba43d923834b0d0027591e52bf

SHA1
2814b4faa0221b252164fbf9586051c07faa050f

SHA256
406d96a4788b07a0c4bda0e289d04472bc92a13f3b5b51e7478d095986735597

SHA512
45d866ec699d731eb7a50669bfa2fb469652b92d92b4546d373777192bff9d2201095ec9e13079ff422b4a7a15175142aa7d2abb57aaf4262b3e837340677069

Download Submit
C:\Users\Admin\AppData\Local\z1jp774dks\data\cached-microdescs.new

Filesize
9.6MB

MD5
d547b75eae6ba991c04d2d5823573bb1

SHA1
fa1ae229518b90a400f02cff1e38a08dd093951b

SHA256
a28638a4f504af07a5cae50ce7a37b193bfb517fa1bad7b7c8697d84c5e6566f

SHA512
59fbdfa061bfddad05d56f3715ee0e919efb9c7b1310540e1950566fffbaab1be154ced2dcc15e86a777f6bf484c85e3198da5ff506a682aa6cb98926a276498

Download Submit
C:\Users\Admin\AppData\Local\z1jp774dks\host\hostname

Filesize
64B

MD5
3292d38441b678c0e53a25d57021ebc9

SHA1
7d2b7d3927d3e406c41e217edb77cbe37c31deb2

SHA256
ed590b1670887a986e40e9df871d264d714aaa4bc929186098ab911e36435b7f

SHA512
e43985f6a291d067fb390034dedab78afc31d39f141af43de49ac5afd7709f8965df13ec5208e231ddddb786ed3be000589ab0a324952b051a5f4a297b3809be

Download Submit
C:\Users\Admin\AppData\Local\z1jp774dks\port.dat

Filesize
4B

MD5
e22cb9d6bbb4c290a94e4fff4d68a831

SHA1
576e5087ae2a7cef90f227119e86f104ec0fdb69

SHA256
d04babcc634473e9751e1dae73d84180eb778e2c92d1ea32810e3866ca0af465

SHA512
2fdd6eb7537cddea088e4e82d9f1317915a0ead43c3b3da8911bea366a768cd263fb11825aeaae76ec4d5f108e9a9d4af559a1bb1cea8564dc71a8841a2d5a0f

Download Submit
C:\Users\Admin\AppData\Local\z1jp774dks\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

Download Submit
C:\Users\Admin\AppData\Local\z1jp774dks\torrc.txt

Filesize
218B

MD5
e20d4e1e175b1d4e8eaade85efa69202

SHA1
ca24f2827d248d7a055fbba7a30aeaef4ae817b9

SHA256
9f45cfd7733447d31e5c4e53dc519e897a26f9c86b64a1821b7fa99bb854fa50

SHA512
ac5b4df632adf355ecf8e8bf96a92f7d6fed8602bc59817253325cd879e80f7561fda6e749218a9c4bfe61c42a9666a76a83bdcd918b2f5b3254843b3c4ff1a5

Download Submit
memory/428-75-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/428-72-0x0000029EEC050000-0x0000029EEC060000-memory.dmp

Filesize
64KB

Download
memory/428-71-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/1564-12-0x000002296E9B0000-0x000002296E9C0000-memory.dmp

Filesize
64KB

Download
memory/1564-57-0x000002296E9B0000-0x000002296E9C0000-memory.dmp

Filesize
64KB

Download
memory/1564-11-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/1564-48-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/2112-0-0x000001E9AE680000-0x000001E9AE6D8000-memory.dmp

Filesize
352KB

Download
memory/2112-6-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/2112-4-0x000001E9B0440000-0x000001E9B0450000-memory.dmp

Filesize
64KB

Download
memory/2112-1-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/2932-114-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/2932-117-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/2932-115-0x0000025DA0DE0000-0x0000025DA0DF0000-memory.dmp

Filesize
64KB

Download
memory/3584-90-0x000001B01B2E0000-0x000001B01B2F0000-memory.dmp

Filesize
64KB

Download
memory/3584-92-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/3584-89-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/3696-96-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/3696-94-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/5016-102-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download
memory/5016-104-0x00007FFA01730000-0x00007FFA021F2000-memory.dmp

Filesize
10.8MB

Download