guloader | 9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa

General

Target

9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe
Size

562KB
MD5

ac95b030d070152383d1e7cb8848c666
SHA1

ecc1e3bbfb34901f7318f53bbf6a0de5ed7f2c13
SHA256

9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa
SHA512

f02a84ebe21348452b5ba67762f1ea3b3915a4b1e5a10d3cfa6b456371861384be5abc60123798371a92a59f5fd3ce1a0ee5f3c00e527110ee9e95d8ce087bb2
SSDEEP

12288:1k2kjT6WanMG0UCcmhcz218oAm3R3W6TRVZdMNd/:+T6BMSCcmv18oRR1ZdM7

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 6 IoCs

pid	Process
2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe
2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe
2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe
2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe
2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe
2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\equity.Mag	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe

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
1068	1616	WerFault.exe	31

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	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2712 wrote to memory of 1616	2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe	31
PID 2712 wrote to memory of 1616	2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe	31
PID 2712 wrote to memory of 1616	2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe	31
PID 2712 wrote to memory of 1616	2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe	31
PID 2712 wrote to memory of 1616	2712	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe	31
PID 1616 wrote to memory of 1068	1616	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe	32
PID 1616 wrote to memory of 1068	1616	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe	32
PID 1616 wrote to memory of 1068	1616	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe	32
PID 1616 wrote to memory of 1068	1616	9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe	32

C:\Users\Admin\AppData\Local\Temp\9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe
"C:\Users\Admin\AppData\Local\Temp\9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2712
- C:\Users\Admin\AppData\Local\Temp\9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe
  "C:\Users\Admin\AppData\Local\Temp\9915d5e510f38806933bfc362590ba12f31c0f003cf40a84b12a5f997b2959fa.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1616
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1616 -s 104
    3⤵
    - Program crash
    PID:1068

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

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\secondo\ruddys\Unobtainably\birgita.txt

Filesize
4KB

MD5
2e7baf4f3c9f5830af25c66ecbe1dac4

SHA1
275ee3d8faeef514ec71605788561bae14f3a48a

SHA256
37346b6387f7d33a9eab62407f94cd716081eb80d7443db91b788479e6fcaf4c

SHA512
a7900cc0e56998f9cd30b24584c15a8a533139cb01d16bf2046c1b1bf5ffbd67216aac69a83d1968206a99185f692bf21429622cbf53a9abbbf528ff21f7cb45

Download Submit
\Users\Admin\AppData\Local\Temp\nseE86D.tmp\LangDLL.dll

Filesize
5KB

MD5
f1e9eed02db3a822a7ddef0c724e5f1f

SHA1
65864992f5b6c79c5efbefb5b1354648a8a86709

SHA256
6dff504c6759c418c6635c9b25b8c91d0d9ef7787a3a93610d7670bb563c09df

SHA512
c22b64fff76b25cf53231b8636f07b361d95791c4646787ce7beac27ad6a0de88337dcceb25b5196f97c452dda72e2614647f51a8a18cb4d5228a82ed2e0780c

Download Submit
\Users\Admin\AppData\Local\Temp\nseE86D.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/1616-51-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1616-50-0x0000000001470000-0x0000000006959000-memory.dmp

Filesize
84.9MB

Download
memory/1616-53-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2712-48-0x0000000076D81000-0x0000000076E82000-memory.dmp

Filesize
1.0MB

Download
memory/2712-49-0x0000000076D80000-0x0000000076F29000-memory.dmp

Filesize
1.7MB

Download

Analysis

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