guloader | ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6

General

Target

ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
Size

866KB
MD5

a09950fd9af3c4e3ff6f778ab5d8ce0f
SHA1

043462f3e5a9b3133908c39e6c3fd8a4f0cade1b
SHA256

ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6
SHA512

316f36143bfb519a3fd27766960f8c758867da2df52463b7373431c2788811c11823c06fe4934e990102c9c2039feb010a501ddaa99274973dd0024f192fa3c2
SSDEEP

24576:QiGFaq43NvC0vEFsNtiqnRCujTrlLq9u4J/QOeaa:QiGFu3NvnEFsNtRdu9u4J/qaa

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
3684	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

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

Web Service

T1102

flow	ioc
21	drive.google.com
22	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3684	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
3560	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3684 set thread context of 3560	3684	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe	92

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\Arder.lnk	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
File opened for modification	C:\Windows\resources\0409\figenkaktusses\Ea40.ini	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
File opened for modification	C:\Windows\Fonts\heraclitic.Wom	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
File opened for modification	C:\Windows\storsejlenes\blackweed.hor	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
File opened for modification	C:\Windows\Arder.lnk	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

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

System Information Discovery
T1082

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	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3684	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3684 wrote to memory of 3560	3684	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe	92
PID 3684 wrote to memory of 3560	3684	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe	92
PID 3684 wrote to memory of 3560	3684	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe	92
PID 3684 wrote to memory of 3560	3684	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe	92
PID 3684 wrote to memory of 3560	3684	ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe	92

C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
"C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3684
- C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe
  "C:\Users\Admin\AppData\Local\Temp\ad1dfc910b1815aea7983124549d2c04376db9b2249b99e3e672b91df91bfec6.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3560

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\nsl7B3C.tmp\System.dll

Filesize
11KB

MD5
34442e1e0c2870341df55e1b7b3cccdc

SHA1
99b2fa21aead4b6ccd8ff2f6d3d3453a51d9c70c

SHA256
269d232712c86983336badb40b9e55e80052d8389ed095ebf9214964d43b6bb1

SHA512
4a8c57fb12997438b488b862f3fc9dc0f236e07bb47b2bce6053dcb03ac7ad171842f02ac749f02dda4719c681d186330524cd2953d33cb50854844e74b33d51

Download Submit
C:\Windows\Arder.lnk

Filesize
726B

MD5
494254afe484cb2a9846dd9982017355

SHA1
1c4e61a24041dc8acffe778a81ebbb1cfd76a18d

SHA256
60b1692d995fb102bbd864cd082e8703ec3151df4fcdae2526c6e133e15a19dd

SHA512
d8bd73c7809fd9365db9590ddd11f453c746f957ae096ca9da7fd5c7892ff77d9eeb06ee85a20aa84688ad5460c960ffdc54b0dd14534a89ede5c4ec9315a5ee

Download Submit
memory/3560-286-0x0000000077AF5000-0x0000000077AF6000-memory.dmp

Filesize
4KB

Download
memory/3560-300-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3560-301-0x0000000077A51000-0x0000000077B71000-memory.dmp

Filesize
1.1MB

Download
memory/3560-282-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3560-299-0x0000000001660000-0x0000000002C19000-memory.dmp

Filesize
21.7MB

Download
memory/3560-284-0x0000000001660000-0x0000000002C19000-memory.dmp

Filesize
21.7MB

Download
memory/3560-285-0x0000000077AD8000-0x0000000077AD9000-memory.dmp

Filesize
4KB

Download
memory/3684-280-0x0000000077A51000-0x0000000077B71000-memory.dmp

Filesize
1.1MB

Download
memory/3684-283-0x0000000002A60000-0x0000000004019000-memory.dmp

Filesize
21.7MB

Download
memory/3684-281-0x0000000074EF4000-0x0000000074EF5000-memory.dmp

Filesize
4KB

Download
memory/3684-279-0x0000000002A60000-0x0000000004019000-memory.dmp

Filesize
21.7MB

Download
memory/3684-307-0x0000000002A60000-0x0000000004019000-memory.dmp

Filesize
21.7MB

Download

Analysis

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