gurcu | 61bca95b6a024da3cc6ac31c4e24d470d9750a6838cf285136ba7a70f9be847e

General

Target

b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe
Size

827KB
MD5

a1ce7b26712e1db177d86fa87d09c354
SHA1

23d567e5ee4d4bf882f5d4ebe54643eecd921ef4
SHA256

b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e
SHA512

e5d5c4770131274c28dab0adbac3ed84395aca30a8c15f7004cd4d28ae503c507dacb432dcce65b2f004711837b3cd7a26766b028957aa3a8bc2d99f9dd849d4
SSDEEP

12288:IKY7z5GoJiGaq5auxKSjipNvJDK2WSqcIVr4vo1euUTyH2BQMyEp0mpefJ3Lww:G5GoR5amjipNvFK2LXG3VrEuqqJ8w

Score

10^/10

gurcu collection spyware stealer

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot5948365373:AAHGoShKq2YoPLHuMrakRbVNthbMABFYHUc/sendMessage?chat_id=-1001620069625

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu
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
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3384 set thread context of 5056	3384	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe	91

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4680	5056	WerFault.exe	91

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5056	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3384 wrote to memory of 5056	3384	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe	91
PID 3384 wrote to memory of 5056	3384	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe	91
PID 3384 wrote to memory of 5056	3384	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe	91
PID 3384 wrote to memory of 5056	3384	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe	91
PID 3384 wrote to memory of 5056	3384	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe	91
PID 3384 wrote to memory of 5056	3384	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe	91
PID 3384 wrote to memory of 5056	3384	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe	91
PID 3384 wrote to memory of 5056	3384	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe	91

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe

C:\Users\Admin\AppData\Local\Temp\b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe
"C:\Users\Admin\AppData\Local\Temp\b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3384
- C:\Users\Admin\AppData\Local\Temp\b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe
  "C:\Users\Admin\AppData\Local\Temp\b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:5056
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 5056 -s 1864
    3⤵
    - Program crash
    PID:4680

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 5056 -ip 5056
1⤵
PID:400

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\b6b0ac3d7e4ef3a97fb470b38e53f3d8114b736b60408d9828cd5f81e2d7cf0e.exe.log

Filesize
1KB

MD5
7cad59aef5a93f093b6ba494f13f796f

SHA1
3cef97b77939bfc06dfd3946fc1a8cd159f67100

SHA256
1e1b444fe2d8772f6709b22b94bb5b0aa7fa590f6a693705d9bf1f2f71267a55

SHA512
8cedd03efec34c6226a01fd6b4831a689be16545ea6b849cd96f775e0722bfefd4b47f3dd8401d2080d341d4319f75995ece60de44352a1f86a2e5dc01e6210b

Download Submit
memory/3384-133-0x0000000000FA0000-0x0000000001076000-memory.dmp

Filesize
856KB

Download
memory/3384-134-0x0000000005FC0000-0x0000000006564000-memory.dmp

Filesize
5.6MB

Download
memory/3384-135-0x0000000005910000-0x00000000059A2000-memory.dmp

Filesize
584KB

Download
memory/3384-136-0x00000000059D0000-0x00000000059DA000-memory.dmp

Filesize
40KB

Download
memory/3384-137-0x0000000005BC0000-0x0000000005BD0000-memory.dmp

Filesize
64KB

Download
memory/3384-138-0x0000000005BC0000-0x0000000005BD0000-memory.dmp

Filesize
64KB

Download
memory/3384-139-0x0000000009920000-0x00000000099BC000-memory.dmp

Filesize
624KB

Download
memory/5056-140-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/5056-143-0x0000000005360000-0x0000000005370000-memory.dmp

Filesize
64KB

Download

Analysis

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