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
154s
max time network
162s
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 01:31

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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

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	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Executes dropped EXE 4 IoCs

pid	Process
3544	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
4528	tor.exe
4876	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
5072	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 6 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\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
142	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
2012	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4308	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3544	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
3544	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
4876	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
4876	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5048	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	3544	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
Token: SeDebugPrivilege	4876	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3544	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
4876	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 5048 wrote to memory of 2732	5048	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	86
PID 5048 wrote to memory of 2732	5048	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	86
PID 2732 wrote to memory of 5092	2732	cmd.exe	88
PID 2732 wrote to memory of 5092	2732	cmd.exe	88
PID 2732 wrote to memory of 4308	2732	cmd.exe	90
PID 2732 wrote to memory of 4308	2732	cmd.exe	90
PID 2732 wrote to memory of 2012	2732	cmd.exe	92
PID 2732 wrote to memory of 2012	2732	cmd.exe	92
PID 2732 wrote to memory of 3544	2732	cmd.exe	93
PID 2732 wrote to memory of 3544	2732	cmd.exe	93
PID 3544 wrote to memory of 752	3544	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	94
PID 3544 wrote to memory of 752	3544	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	94
PID 3544 wrote to memory of 4528	3544	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	96
PID 3544 wrote to memory of 4528	3544	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	96
PID 4876 wrote to memory of 5072	4876	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe	102
PID 4876 wrote to memory of 5072	4876	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.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-1-5-21-1574508946-349927670-1185736483-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1574508946-349927670-1185736483-1000\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⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5048
- 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:2732
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:5092
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4308
- - 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:2012
- - C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.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
    PID:3544
  - - C:\Windows\System32\tar.exe
      "C:\Windows\System32\tar.exe" -xvzf "C:\Users\Admin\AppData\Local\Temp\tmp3014.tmp" -C "C:\Users\Admin\AppData\Local\lcybndk48g"
      4⤵
      PID:752
  - - 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:4528

C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
C:\Users\Admin\AppData\Local\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe
1⤵
- 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:4876
- 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:5072

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\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

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\TeamViewer\k2fef4820980d3c2c1f2cce2f95e94f5e1c18.exe

Filesize
339KB

MD5
1cab66a5c15f97f040fb23d354d04a9c

SHA1
f0dbebd22b2c7bfedbefa4435b345c58416f9448

SHA256
d71329c78c704ee9cc7133761b5e738a315e7eb784e348d7743a8a7366724e9f

SHA512
a5508a75a0a7c747cc50fe8284b9097e1cb9ae83bd7e80553ffa875a6d07d6eec7fc18f66a0a328aa0614c26642d884bfe152e6c09a11eeb0d64f6be66064eab

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\tmp3014.tmp

Filesize
13.3MB

MD5
89d2d5811c1aff539bb355f15f3ddad0

SHA1
5bb3577c25b6d323d927200c48cd184a3e27c873

SHA256
b630008f6d3887793d48b87091e56691e292894dd4fa100dc4a418a2f29dcc12

SHA512
39e576124c54143520c5435a2ef9b24506131e13403489c0692f09b89135015d611c4988d4772f8a1e6557fa68b4667d467334461009cee8c2227dfc3e295289

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

Filesize
2.7MB

MD5
b3ef94a3423ec1d2c0b63d3eff9c9fff

SHA1
74ba4b10cfb9ca4ee1b3c6bc318a5c765cf49df2

SHA256
8e17bbec63e22d1c3874023ba932ea3e03dbcc8116925fe893ff479d4bcfd9f1

SHA512
f6f1a685cb0844f82152da13f86042f8bd321f73cc0742c96cc8e14a55c53a9dd0cc227249f9bb60899d911e31ae4b28f72345957390e3a5c006e22cd57a6742

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

Filesize
20.1MB

MD5
a3f206a1eff936fa79c394fab2c9b9a3

SHA1
9490f320b6e900951672b018cdae8406a6e6bf4f

SHA256
12a30740afa8886e683435c32ccac148d36ffba42ffed5e9443982eb68c12e2a

SHA512
04f8c7b005347bc6ca2ea4f049cb796dc1aa72e9ceeacdddf47c60152af850e09c94009ac8cddf29790b9c3c9bfc9e74c17c2e93def7418535aa2576a8ef934f

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

Filesize
64B

MD5
a60e26a0b30521e7a70bf602cb6aae8a

SHA1
3c70d12dd2a6247a65e62ae59a33b04ef5f9554f

SHA256
b8cbb7337289e48228db6a7cacdf702521ea6d78efa80d5e9732e9312259a526

SHA512
e5f620d2e58c7070ffdcef17e26e27c6b5db49af2c4d5ae33bd3c78b6b768b454a2df8f2ac74aac3d7fb9e92af6275816c71a1ab92653cb81bd8c24eeca1291a

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

Filesize
4B

MD5
b426b30042abbc15e363cb679bbc937d

SHA1
feba5b00aa45ad164530435ce81ea1da4b2b66db

SHA256
c4f9fcfbf89fa5e150549254e038fbd92543b00e532e5b4248d88c12b4e94d01

SHA512
6d7485d47e56fbf3a1107317b78a57a2c3358f4bff185b9c0e519f1aab6f04d4ae9f5efd5241de274509912859a9488905be65bc328e357b44b1eb951344579a

Download Submit
C:\Users\Admin\AppData\Local\lcybndk48g\report.lock

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

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\tor\tor.exe

Filesize
7.4MB

MD5
88590909765350c0d70c6c34b1f31dd2

SHA1
129b27c3926e53e5df6d44cc6adf39c3a8d9ebf7

SHA256
46fe244b548265c78ab961e8f787bc8bf21edbcaaf175fa3b8be3137c6845a82

SHA512
a8af08d9169a31a1c3419d4e6e8fbe608c800d323840563b5a560d3e09e78a492201f07cc0d3864efbff8ad81e59885fc43a6b749e0a3377aa8555df258af192

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
551fbdf8f1f586cb706c6ca813cb20df

SHA1
10627ff45d1c37ea9638426a477a6699d74b0833

SHA256
a065b4e17bcffcf1da439666781234fe16f57e0a149159a284e8c36afff17493

SHA512
a7a8ef6e37f35a0a8b6ef8d54f886d752dd38b34e95cdba27dcaebc32614e5c0bcb5c249cec540e7d633c34d20cb833fc691fb4287ade09e8ebc9e343ddeebbb

Download Submit
memory/3544-11-0x00007FFC79930000-0x00007FFC7A3F1000-memory.dmp

Filesize
10.8MB

Download
memory/3544-12-0x0000020470940000-0x0000020470950000-memory.dmp

Filesize
64KB

Download
memory/3544-17-0x0000020470940000-0x0000020470950000-memory.dmp

Filesize
64KB

Download
memory/3544-15-0x00007FFC79930000-0x00007FFC7A3F1000-memory.dmp

Filesize
10.8MB

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memory/4876-72-0x00007FFC79930000-0x00007FFC7A3F1000-memory.dmp

Filesize
10.8MB

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memory/4876-79-0x00007FFC79930000-0x00007FFC7A3F1000-memory.dmp

Filesize
10.8MB

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memory/4876-80-0x000002C2F18B0000-0x000002C2F18C0000-memory.dmp

Filesize
64KB

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memory/4876-92-0x00007FFC79930000-0x00007FFC7A3F1000-memory.dmp

Filesize
10.8MB

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memory/5048-1-0x00007FFC7A660000-0x00007FFC7B121000-memory.dmp

Filesize
10.8MB

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memory/5048-6-0x00007FFC7A660000-0x00007FFC7B121000-memory.dmp

Filesize
10.8MB

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memory/5048-0-0x000001964C180000-0x000001964C1DC000-memory.dmp

Filesize
368KB

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memory/5048-2-0x000001964E0E0000-0x000001964E0F0000-memory.dmp

Filesize
64KB

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