gurcu | c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9

Resubmissions

10/04/2024, 02:28

240410-cyaxtsca43 10

10/04/2024, 02:28

10/04/2024, 02:28

10/04/2024, 02:28

14/10/2023, 01:16

Analysis

max time kernel
23s
max time network
160s
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, 01:16

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General

Target

m1f1f3a069223072f8d6802a079235d.exe
Size

306KB
MD5

4b36dcaa94c3eca48a6292bd670ffe79
SHA1

705484e61ac39ba02cc80903be0da6ce74333334
SHA256

c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9
SHA512

cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a
SSDEEP

3072:71E/yXS0m2pOVLVewP2D/kIyC+mvXi1QJIkjXAToknBq9tT/8RJ6W3t3dpdQGqKI:7E2mDMtqa5EOTeKXAllKD9bmTneefA

Score

10^/10

gurcu spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot6209822134:AAHQxD-CI1YDVcNbXijXHlonsEUgv3dfYtg/sendMessage?chat_id=-1001529292045

Signatures

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

Checks computer location settings 2 TTPs 1 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	m1f1f3a069223072f8d6802a079235d.exe

Executes dropped EXE 1 IoCs

pid	Process
4988	m1f1f3a069223072f8d6802a079235d.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
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
1252	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5012	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1652	m1f1f3a069223072f8d6802a079235d.exe
Token: SeDebugPrivilege	4988	m1f1f3a069223072f8d6802a079235d.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 2400	1652	m1f1f3a069223072f8d6802a079235d.exe	88
PID 1652 wrote to memory of 2400	1652	m1f1f3a069223072f8d6802a079235d.exe	88
PID 2400 wrote to memory of 2352	2400	cmd.exe	90
PID 2400 wrote to memory of 2352	2400	cmd.exe	90
PID 2400 wrote to memory of 5012	2400	cmd.exe	91
PID 2400 wrote to memory of 5012	2400	cmd.exe	91
PID 2400 wrote to memory of 1252	2400	cmd.exe	93
PID 2400 wrote to memory of 1252	2400	cmd.exe	93
PID 2400 wrote to memory of 4988	2400	cmd.exe	94
PID 2400 wrote to memory of 4988	2400	cmd.exe	94

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

C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe
"C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1652
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "m1f1f3a069223072f8d6802a079235d" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\m1f1f3a069223072f8d6802a079235d.exe" &&START "" "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2400
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2352
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:5012
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "m1f1f3a069223072f8d6802a079235d" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1252
- - C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe
    "C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4988

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

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\m1f1f3a069223072f8d6802a079235d.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe

Filesize
306KB

MD5
4b36dcaa94c3eca48a6292bd670ffe79

SHA1
705484e61ac39ba02cc80903be0da6ce74333334

SHA256
c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9

SHA512
cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a

Download Submit
C:\Users\Admin\AppData\Local\TeamViewer\m1f1f3a069223072f8d6802a079235d.exe

Filesize
306KB

MD5
4b36dcaa94c3eca48a6292bd670ffe79

SHA1
705484e61ac39ba02cc80903be0da6ce74333334

SHA256
c2e57e9b6e52a5429ae7a7bd36c57f63589d78fbf0ffe5760ada4a67b9fadec9

SHA512
cf07d7f80264554eb3b945421ca41db38ff79707775d355d478c09f4b64d14f523339295aa4bc9b79c0dbb004e6756585bcf85edc8cbc2d16f7f0481be93513a

Download Submit
memory/1652-0-0x000001996AEB0000-0x000001996AF02000-memory.dmp

Filesize
328KB

Download
memory/1652-1-0x00007FF88A770000-0x00007FF88B231000-memory.dmp

Filesize
10.8MB

Download
memory/1652-2-0x000001996D420000-0x000001996D430000-memory.dmp

Filesize
64KB

Download
memory/1652-6-0x00007FF88A770000-0x00007FF88B231000-memory.dmp

Filesize
10.8MB

Download
memory/4988-11-0x00007FF88A820000-0x00007FF88B2E1000-memory.dmp

Filesize
10.8MB

Download
memory/4988-12-0x0000020118840000-0x0000020118850000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads