guloader | dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb

General

Target

dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe
Size

590KB
MD5

e0072e8f6e8166cda1c0b3fed59f7ed0
SHA1

bbc5b0bced26273db1261557f503537ae93911d8
SHA256

dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb
SHA512

f9b497038002d46990681af2410983c90e81f86803b433671accecc292e8b7ec0040345ae3c1215dd83caee97f6347b3d4b3e6eba24540d300451224e8b19889
SSDEEP

12288:V5RPxLcMMvMMMMMMMMMMMMMMtMMMMMMMMMMMMMMMMMMRKz7y1CHhW8SilZJfWGkl:pPxLcMMvMMMMMMMMMMMMMMtMMMMMMMMf

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 1 IoCs

pid	Process
2716	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe

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

Web Service

T1102

flow	ioc
13	drive.google.com
14	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3188	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2716	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe
3188	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2716 set thread context of 3188	2716	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe	87

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
5116	3188	WerFault.exe	87

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	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3188	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe
3188	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2716	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2716 wrote to memory of 3188	2716	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe	87
PID 2716 wrote to memory of 3188	2716	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe	87
PID 2716 wrote to memory of 3188	2716	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe	87
PID 2716 wrote to memory of 3188	2716	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe	87
PID 2716 wrote to memory of 3188	2716	dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe	87

C:\Users\Admin\AppData\Local\Temp\dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe
"C:\Users\Admin\AppData\Local\Temp\dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.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:2716
- C:\Users\Admin\AppData\Local\Temp\dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe
  "C:\Users\Admin\AppData\Local\Temp\dc221854c9102e1b98cd34e1dd075894e729e2b42634382baca6f35be94875bb.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:3188
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3188 -s 1784
    3⤵
    - Program crash
    PID:5116

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3188 -ip 3188
1⤵
PID:2876

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\nsr96E2.tmp\System.dll

Filesize
12KB

MD5
dd87a973e01c5d9f8e0fcc81a0af7c7a

SHA1
c9206ced48d1e5bc648b1d0f54cccc18bf643a14

SHA256
7fb0f8d452fefaac789986b933df050f3d3e4feb8a8d9944ada995f572dcdca1

SHA512
4910b39b1a99622ac8b3c42f173bbe7035ac2f8d40c946468e7db7e2868a2da81ea94da453857f06f39957dd690c7f1ba498936a7aaa0039975e472376f92e8f

Download Submit
memory/2716-13-0x00000000028B0000-0x00000000034FA000-memory.dmp

Filesize
12.3MB

Download
memory/2716-14-0x00000000770D1000-0x00000000771F1000-memory.dmp

Filesize
1.1MB

Download
memory/2716-15-0x0000000074575000-0x0000000074576000-memory.dmp

Filesize
4KB

Download
memory/2716-16-0x00000000028B0000-0x00000000034FA000-memory.dmp

Filesize
12.3MB

Download
memory/3188-17-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3188-18-0x0000000001660000-0x00000000022AA000-memory.dmp

Filesize
12.3MB

Download
memory/3188-19-0x0000000077158000-0x0000000077159000-memory.dmp

Filesize
4KB

Download
memory/3188-20-0x0000000077175000-0x0000000077176000-memory.dmp

Filesize
4KB

Download
memory/3188-21-0x0000000001660000-0x00000000022AA000-memory.dmp

Filesize
12.3MB

Download
memory/3188-31-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3188-35-0x00000000770D1000-0x00000000771F1000-memory.dmp

Filesize
1.1MB

Download
memory/3188-36-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3188-37-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/3188-38-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3188-39-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3188-40-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/3188-41-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3188-42-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3188-44-0x0000000001660000-0x00000000022AA000-memory.dmp

Filesize
12.3MB

Download
memory/3188-45-0x0000000000401000-0x0000000000404000-memory.dmp

Filesize
12KB

Download
memory/3188-43-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download

Analysis

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