guloader | ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66

General

Target

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
Size

717KB
MD5

880321afc15e4ba38ce4c6c4e0a512e4
SHA1

b3b15390ccc25cf74df2aea1a20269e06b54a6d7
SHA256

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66
SHA512

4939777bc3b5ea2968df32a32eb47a7a168c531a2d2c7ae40a9c3bd6c2758f59042ba51a9d8a870be881b673385dff97164ac27a901d748f413c71bb824e24fe
SSDEEP

12288:irgjBLiIK2WVy/YqpuSKSKl/oSRHW2ugcYdUsr5aoWy8ihXmmwMRzcLSIHB:i0jBiIK2R/5puSsJoSknqUO5DXjZcWIh

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

Processes:

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

pid	process
4188	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
4188	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

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

Web Service
T1102

Processes:

flow ioc

19 drive.google.com
20 drive.google.com
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

pid process

3100 ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

flow	ioc
19	drive.google.com
20	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.execa59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

pid	process
4188	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
3100	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

description	pid	process	target process
PID 4188 set thread context of 3100	4188	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

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

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

916 3100 WerFault.exe ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

pid	pid_target	process	target process
916	3100	WerFault.exe	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

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

Processes:

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.execa59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

pid	process
3100	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
3100	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

pid process

4188 ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

description	pid	process	target process
PID 4188 wrote to memory of 3100	4188	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
PID 4188 wrote to memory of 3100	4188	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
PID 4188 wrote to memory of 3100	4188	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
PID 4188 wrote to memory of 3100	4188	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
PID 4188 wrote to memory of 3100	4188	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe	ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe

C:\Users\Admin\AppData\Local\Temp\ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
"C:\Users\Admin\AppData\Local\Temp\ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.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:4188
- C:\Users\Admin\AppData\Local\Temp\ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe
  "C:\Users\Admin\AppData\Local\Temp\ca59e14180c4b88c328f4704724a32c82295a9324bcbb9bf146a895f2f8eaa66.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3100
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3100 -s 1516
    3⤵
    - Program crash
    PID:916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 3100 -ip 3100
1⤵
PID:3408

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsr8ACC.tmp\System.dll

Filesize
12KB

MD5
dd87a973e01c5d9f8e0fcc81a0af7c7a

SHA1
c9206ced48d1e5bc648b1d0f54cccc18bf643a14

SHA256
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1

SHA512
4910b39b1a99622ac8b3c42f173bbe7035ac2f8d40c946468e7db7e2868a2da81ea94da453857f06f39957dd690c7f1ba498936a7aaa0039975e472376f92e8f

Download Submit
memory/3100-20-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3100-37-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3100-36-0x0000000001660000-0x0000000003DDF000-memory.dmp

Filesize
39.5MB

Download
memory/3100-35-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3100-34-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3100-21-0x0000000001660000-0x0000000003DDF000-memory.dmp

Filesize
39.5MB

Download
memory/4188-16-0x0000000076F31000-0x0000000077051000-memory.dmp

Filesize
1.1MB

Download
memory/4188-19-0x0000000003190000-0x000000000590F000-memory.dmp

Filesize
39.5MB

Download
memory/4188-17-0x0000000076F31000-0x0000000077051000-memory.dmp

Filesize
1.1MB

Download
memory/4188-18-0x00000000743D5000-0x00000000743D6000-memory.dmp

Filesize
4KB

Download
memory/4188-15-0x0000000003190000-0x000000000590F000-memory.dmp

Filesize
39.5MB

Download
memory/4188-14-0x0000000003190000-0x000000000590F000-memory.dmp

Filesize
39.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads