guloader | 67f175e8da6a4a4a521b457be91e35a9021059db411573070d0a2ae0c9b48355

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28-06-2024 01:25

Target

Jailkeeper.exe
Size

858KB
MD5

c7eefc30a9cdc5bab3269cefde2d221e
SHA1

27914bc81bdc74d9607784d9e239f5437b1e8cb1
SHA256

2a089fc9b24c5253a913526be0ac2ee62b911a96645cb70885d678c91dcb83c9
SHA512

fce33213726f84946162e2c115f67dc4dbfe60af9ca6b6ceb75d576f9370abc98ed0309acf617a2c6f34ffc023632ce1b32391716190980aceb4af84dce3798c
SSDEEP

24576:XcIjUna3iVPF+zgyKKht6APjMtiVBsRXRU:kbF50httQbi

Score

10^/10

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Loads dropped DLL 1 IoCs

Processes:

Jailkeeper.exe

pid process

2624 Jailkeeper.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Jailkeeper.exeJailkeeper.exe

pid process

2624 Jailkeeper.exe
1248 Jailkeeper.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

Jailkeeper.exe

description pid process target process

PID 2624 set thread context of 1248 2624 Jailkeeper.exe Jailkeeper.exe
Drops file in Windows directory 1 IoCs

Processes:

Jailkeeper.exe

description ioc process

File opened for modification C:\Windows\reassigned\sandi.ini Jailkeeper.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

Processes:

Jailkeeper.exe

pid process

2624 Jailkeeper.exe

pid	process
2624	Jailkeeper.exe

pid	process
2624	Jailkeeper.exe
1248	Jailkeeper.exe

description	pid	process	target process
PID 2624 set thread context of 1248	2624	Jailkeeper.exe	Jailkeeper.exe

description	ioc	process
File opened for modification	C:\Windows\reassigned\sandi.ini	Jailkeeper.exe

pid	process
2624	Jailkeeper.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

Jailkeeper.exe

description	pid	process	target process
PID 2624 wrote to memory of 1248	2624	Jailkeeper.exe	Jailkeeper.exe
PID 2624 wrote to memory of 1248	2624	Jailkeeper.exe	Jailkeeper.exe
PID 2624 wrote to memory of 1248	2624	Jailkeeper.exe	Jailkeeper.exe
PID 2624 wrote to memory of 1248	2624	Jailkeeper.exe	Jailkeeper.exe
PID 2624 wrote to memory of 1248	2624	Jailkeeper.exe	Jailkeeper.exe

C:\Users\Admin\AppData\Local\Temp\Jailkeeper.exe
"C:\Users\Admin\AppData\Local\Temp\Jailkeeper.exe"
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:1248

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

C:\Users\Admin\AppData\Local\Temp\nsl4A49.tmp\System.dll
Filesize
11KB

MD5
55a26d7800446f1373056064c64c3ce8

SHA1
80256857e9a0a9c8897923b717f3435295a76002

SHA256
904fd5481d72f4e03b01a455f848dedd095d0fb17e33608e0d849f5196fb6ff8

SHA512
04b8ab7a85c26f188c0a06f524488d6f2ac2884bf107c860c82e94ae12c3859f825133d78338fd2b594dfc48f7dc9888ae76fee786c6252a5c77c88755128a5b

Download Submit
memory/1248-27-0x0000000001700000-0x000000000254A000-memory.dmp

Filesize
14.3MB

Download
memory/1248-28-0x0000000077858000-0x0000000077859000-memory.dmp

Filesize
4KB

Download
memory/1248-29-0x0000000077875000-0x0000000077876000-memory.dmp

Filesize
4KB

Download
memory/1248-31-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/1248-32-0x0000000001700000-0x000000000254A000-memory.dmp

Filesize
14.3MB

Download
memory/1248-34-0x00000000777D1000-0x00000000778F1000-memory.dmp

Filesize
1.1MB

Download
memory/2624-24-0x0000000004B70000-0x00000000059BA000-memory.dmp

Filesize
14.3MB

Download
memory/2624-25-0x00000000777D1000-0x00000000778F1000-memory.dmp

Filesize
1.1MB

Download
memory/2624-26-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2624-30-0x0000000004B70000-0x00000000059BA000-memory.dmp

Filesize
14.3MB

Download
memory/2624-39-0x0000000004B70000-0x00000000059BA000-memory.dmp

Filesize
14.3MB

Download