guloader | cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac

General

Target

cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
Size

1.1MB
MD5

2ac9cd56e3877efa00a0353cde71186f
SHA1

d0460a2b1fe30c342216048c4390af045b120146
SHA256

cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac
SHA512

e78d405d9b92319d396d488e4c104021a224789fabf09a278d252e1aa407cae1ce4d3562f1e6a18bc3151e16049a1a6d3687b6a4578fc4c946349d5292eb9e2d
SSDEEP

24576:oS5HuMJiUsl/f4g0lnQFpy54j3BjqgMQUWhypBj:B5o/falnQ+54j3ZftUNBj

Score

10^/10

guloader downloader persistence

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
4432	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Gaucheries = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Kerykeion126\\Tranlampe231.exe"	wab.exe

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

Web Service

T1102

flow	ioc
37	drive.google.com
38	drive.google.com

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\lohoch.gim	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
File opened for modification	C:\Windows\SysWOW64\threshes.uds	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4432	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
4284	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4432 set thread context of 4284	4432	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	90

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\forbandelsernes\kln.lio	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\enchasing.Pet	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
File opened for modification	C:\Windows\Fonts\Forters67\Elektrotekniker.wra	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
File opened for modification	C:\Windows\Tnkepauses.tro	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4432	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 4284	4432	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	90
PID 4432 wrote to memory of 4284	4432	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	90
PID 4432 wrote to memory of 4284	4432	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	90
PID 4432 wrote to memory of 4284	4432	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	90
PID 4432 wrote to memory of 4284	4432	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	90

C:\Users\Admin\AppData\Local\Temp\cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
"C:\Users\Admin\AppData\Local\Temp\cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Program Files (x86)\windows mail\wab.exe
  "C:\Users\Admin\AppData\Local\Temp\cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:4284

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsa51D.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/4284-23-0x0000000002150000-0x000000000499D000-memory.dmp

Filesize
40.3MB

Download
memory/4284-24-0x00000000772C8000-0x00000000772C9000-memory.dmp

Filesize
4KB

Download
memory/4284-25-0x0000000077241000-0x0000000077361000-memory.dmp

Filesize
1.1MB

Download
memory/4284-27-0x0000000002150000-0x000000000499D000-memory.dmp

Filesize
40.3MB

Download
memory/4284-28-0x0000000000EF0000-0x0000000002144000-memory.dmp

Filesize
18.3MB

Download
memory/4432-19-0x00000000052D0000-0x0000000007B1D000-memory.dmp

Filesize
40.3MB

Download
memory/4432-20-0x00000000052D0000-0x0000000007B1D000-memory.dmp

Filesize
40.3MB

Download
memory/4432-21-0x0000000077241000-0x0000000077361000-memory.dmp

Filesize
1.1MB

Download
memory/4432-22-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads