guloader | d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562

General

Target

d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe
Size

1003KB
MD5

44ca4d83095d7f0372c1eab439f633be
SHA1

b90fdcf957fc294917a047608bb2188a1596e5e7
SHA256

d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562
SHA512

d81d6e6b625aae8bfce7a5972d6b5e41e101c330f1ca5221333d90013c1c1ded2cddede20aad64f61bb9e645068d28eeb256cceadb307bf49c3b284c98dd5ad3
SSDEEP

24576:9jwKCNm+hbhARlNsfvUdQQIhf2cwCZLiSWfQOEy5Yx7tXv:V1CIMhKHdP3zCxHlhyqx7t/

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 2 IoCs

pid	Process
996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe
996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
42	drive.google.com
43	drive.google.com

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
82	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2836	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe
2836	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 996 set thread context of 2836	996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe	82

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
952	2836	WerFault.exe	82

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2836	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 996 wrote to memory of 2836	996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe	82
PID 996 wrote to memory of 2836	996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe	82
PID 996 wrote to memory of 2836	996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe	82
PID 996 wrote to memory of 2836	996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe	82
PID 996 wrote to memory of 2836	996	d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe	82

C:\Users\Admin\AppData\Local\Temp\d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe
"C:\Users\Admin\AppData\Local\Temp\d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:996
- C:\Users\Admin\AppData\Local\Temp\d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe
  "C:\Users\Admin\AppData\Local\Temp\d7aca08687c1ffc0b01ad90f5500c968796bebf8b60995363c8d7c19be48c562.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2836
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2836 -s 2288
    3⤵
    - Program crash
    PID:952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2836 -ip 2836
1⤵
PID:3516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsiCE00.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
memory/996-13-0x00000000032E0000-0x00000000063DB000-memory.dmp

Filesize
49.0MB

Download
memory/996-14-0x0000000077E31000-0x0000000077F51000-memory.dmp

Filesize
1.1MB

Download
memory/996-15-0x0000000074B25000-0x0000000074B26000-memory.dmp

Filesize
4KB

Download
memory/996-16-0x00000000032E0000-0x00000000063DB000-memory.dmp

Filesize
49.0MB

Download
memory/996-17-0x00000000032E0000-0x00000000063DB000-memory.dmp

Filesize
49.0MB

Download
memory/2836-18-0x00000000016E0000-0x00000000047DB000-memory.dmp

Filesize
49.0MB

Download
memory/2836-28-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2836-32-0x00000000016E0000-0x00000000047DB000-memory.dmp

Filesize
49.0MB

Download
memory/2836-33-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2836-34-0x0000000000480000-0x000000000049E000-memory.dmp

Filesize
120KB

Download
memory/2836-35-0x0000000037560000-0x0000000037B04000-memory.dmp

Filesize
5.6MB

Download
memory/2836-36-0x0000000037B10000-0x0000000037BAC000-memory.dmp

Filesize
624KB

Download
memory/2836-38-0x00000000016E0000-0x00000000047DB000-memory.dmp

Filesize
49.0MB

Download

Analysis

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