gurcu | dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129

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 spyware 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

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-1-5-21-4272677097-406801653-1594978504-1000\Control Panel\International\Geo\Nation	f21559ac7c67d871d4f05.exe

Executes dropped EXE 1 IoCs

pid	Process
2100	f21559ac7c67d871d4f05.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-1-5-21-4272677097-406801653-1594978504-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	f21559ac7c67d871d4f05.exe
Key opened	\REGISTRY\USER\S-1-5-21-4272677097-406801653-1594978504-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	f21559ac7c67d871d4f05.exe
Key opened	\REGISTRY\USER\S-1-5-21-4272677097-406801653-1594978504-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	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.

persistence

Scheduled Task/Job

T1053

pid	Process
3880	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1700	PING.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3768	f21559ac7c67d871d4f05.exe
Token: SeDebugPrivilege	2100	f21559ac7c67d871d4f05.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3768 wrote to memory of 232	3768	f21559ac7c67d871d4f05.exe	85
PID 3768 wrote to memory of 232	3768	f21559ac7c67d871d4f05.exe	85
PID 232 wrote to memory of 64	232	cmd.exe	87
PID 232 wrote to memory of 64	232	cmd.exe	87
PID 232 wrote to memory of 1700	232	cmd.exe	88
PID 232 wrote to memory of 1700	232	cmd.exe	88
PID 232 wrote to memory of 3880	232	cmd.exe	94
PID 232 wrote to memory of 3880	232	cmd.exe	94
PID 232 wrote to memory of 2100	232	cmd.exe	95
PID 232 wrote to memory of 2100	232	cmd.exe	95

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-1-5-21-4272677097-406801653-1594978504-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	f21559ac7c67d871d4f05.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4272677097-406801653-1594978504-1000\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⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3768
- 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:232
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:64
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:1700
- - 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:3880
- - 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 use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:2100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\f21559ac7c67d871d4f05.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

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\Nvidia\f21559ac7c67d871d4f05.exe

Filesize
327KB

MD5
78fd6df30f791c7b5f45dca0b4c952a5

SHA1
d977ca82da0850eb5d4e69c9c657d1a41fb9c44d

SHA256
dba8f020ac6d09728422932492657fea3f0a95754cd279f5a949b6982bd32129

SHA512
abf0efb2412c522fbb7f6725a548e8d6a8bc045801a4dd8652a544a1527b99647140ad4843c41a6b00a728a5d8361c7e2ea80eba8ee3b291238729277dad228d

Download Submit
memory/2100-11-0x00007FFBEECB0000-0x00007FFBEF771000-memory.dmp

Filesize
10.8MB

Download
memory/2100-12-0x0000021A737F0000-0x0000021A73800000-memory.dmp

Filesize
64KB

Download
memory/3768-0-0x000002793D8E0000-0x000002793D938000-memory.dmp

Filesize
352KB

Download
memory/3768-1-0x00007FFBEFD20000-0x00007FFBF07E1000-memory.dmp

Filesize
10.8MB

Download
memory/3768-3-0x0000027958020000-0x0000027958030000-memory.dmp

Filesize
64KB

Download
memory/3768-6-0x00007FFBEFD20000-0x00007FFBF07E1000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads