gurcu | dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129 | Triage™

Resubmissions

10/04/2024, 02:52

240410-dcqxlaff2v10

10/04/2024, 02:52

240410-dcqltscc7210

10/04/2024, 02:51

240410-dcm6pscc6710

10/04/2024, 02:51

240410-dcmj6scc6610

14/10/2023, 04:10

231014-erhp7sga6y10

Analysis

max time kernel
7s
max time network
13s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
10/04/2024, 02:52

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General

Target
f21559ac7c67d871d4f05.exe
Size 327KB
Sample240410-dcqltscc72
SHA256 dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129
MD5 78fd6df30f791c7b5f45dca0b4c952a5
SHA1 d977ca82da0850eb5d4e69c9c657d1a41fb9c44d
SHA512 abf0efb2412c522fbb7f6725a548e8d6a8bc045801a4dd8652a544a1527b99647140ad4843c41a6b00a728a5d8361c7e2ea80eba8ee3b291238729277dad228d
SSDEEP 6144:Vc6sWfGY/yODx332tOIXlU1QWZxXAnuHW9bbGDwVdqe1mM:Ps+CXIAuGG8dA
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

gurcu stealer

Malware Config

Extracted

Family

gurcu

C2

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

Deletes itself 1 IoCs

pid	Process
2780	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2648	f21559ac7c67d871d4f05.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.

Scheduled Task/Job

pid	Process
2736	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
2592	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2036	f21559ac7c67d871d4f05.exe
Token: SeDebugPrivilege	2648	f21559ac7c67d871d4f05.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2036 wrote to memory of 2780	2036	f21559ac7c67d871d4f05.exe	28
PID 2036 wrote to memory of 2780	2036	f21559ac7c67d871d4f05.exe	28
PID 2036 wrote to memory of 2780	2036	f21559ac7c67d871d4f05.exe	28
PID 2780 wrote to memory of 2484	2780	cmd.exe	30
PID 2780 wrote to memory of 2484	2780	cmd.exe	30
PID 2780 wrote to memory of 2484	2780	cmd.exe	30
PID 2780 wrote to memory of 2592	2780	cmd.exe	31
PID 2780 wrote to memory of 2592	2780	cmd.exe	31
PID 2780 wrote to memory of 2592	2780	cmd.exe	31
PID 2780 wrote to memory of 2736	2780	cmd.exe	32
PID 2780 wrote to memory of 2736	2780	cmd.exe	32
PID 2780 wrote to memory of 2736	2780	cmd.exe	32
PID 2780 wrote to memory of 2648	2780	cmd.exe	33
PID 2780 wrote to memory of 2648	2780	cmd.exe	33
PID 2780 wrote to memory of 2648	2780	cmd.exe	33

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\f21559ac7c67d871d4f05.exe
"C:\Users\Admin\AppData\Local\Temp\f21559ac7c67d871d4f05.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2036
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2780
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2484
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2592
- - 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:2736
- - C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
    "C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Credential Access

Discovery

Query Registry

Remote System Discovery

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

f21559ac7c67d871d4f05.exe

Path C:\Users\Admin\AppData\Local\Nvidia\f21559ac7c67d871d4f05.exe
Size 327KB
SHA256 dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129
MD5 78fd6df30f791c7b5f45dca0b4c952a5
SHA1 d977ca82da0850eb5d4e69c9c657d1a41fb9c44d
SHA512 abf0efb2412c522fbb7f6725a548e8d6a8bc045801a4dd8652a544a1527b99647140ad4843c41a6b00a728a5d8361c7e2ea80eba8ee3b291238729277dad228d
SSDEEP 6144:Vc6sWfGY/yODx332tOIXlU1QWZxXAnuHW9bbGDwVdqe1mM:Ps+CXIAuGG8dA
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2036-0-0x0000000000FD0000-0x0000000001028000-memory.dmp

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memory/2036-1-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

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memory/2036-2-0x000000001A8D0000-0x000000001A950000-memory.dmp

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memory/2036-5-0x000007FEF5C40000-0x000007FEF662C000-memory.dmp

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memory/2648-9-0x0000000000B30000-0x0000000000B88000-memory.dmp

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memory/2648-10-0x000007FEF5250000-0x000007FEF5C3C000-memory.dmp

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memory/2648-11-0x000000001B550000-0x000000001B5D0000-memory.dmp

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