guloader | cc4ec245c4b3331cf3a4d87b5ee073b3b83141f54d64ea716c916ed7201df9d4

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
28-03-2023 06:58

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General

Target

Operaciones de Cuenta.exe
Size

678KB
MD5

71b2e12765ab5b744e42aea118f2845d
SHA1

8882d7c1ef14d140f9de727207a95ef5ffb68fd3
SHA256

f6ff5a18073b56d3a8d83195fa49486e289524729a081b5e49664f38854fe7e3
SHA512

67050f92dca57dc887d11736f7722c085e29b5a6e2974ff74e9ab2182856d6246ce113123a27ef13728d31ef2fab333cf677bf488f8f8ab400e65fd168262c20
SSDEEP

12288:uMw4EAPcLqU6LfBVbPWxAeWqHpST3yZrn0aHDyq9DSXALFWscaLU2:uMwtAPcLqU6nPKAzR3yBDyq0G62

Score

10^/10

guloader downloader

Malware Config

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Operaciones de Cuenta.execaspol.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	Operaciones de Cuenta.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	caspol.exe

Loads dropped DLL 2 IoCs

Processes:

Operaciones de Cuenta.exe

pid process

1752 Operaciones de Cuenta.exe
1752 Operaciones de Cuenta.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Operaciones de Cuenta.execaspol.exe

pid process

1752 Operaciones de Cuenta.exe
872 caspol.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

Operaciones de Cuenta.exe

description pid process target process

PID 1752 set thread context of 872 1752 Operaciones de Cuenta.exe caspol.exe
Drops file in Windows directory 1 IoCs

Processes:

Operaciones de Cuenta.exe

description ioc process

File opened for modification C:\Windows\resources\0409\Ledetekstens\smrokkerne\Slowheartedness.ini Operaciones de Cuenta.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

Operaciones de Cuenta.exe

pid process

1752 Operaciones de Cuenta.exe
1752 Operaciones de Cuenta.exe

pid	process
1752	Operaciones de Cuenta.exe
1752	Operaciones de Cuenta.exe

pid	process
1752	Operaciones de Cuenta.exe
872	caspol.exe

description	pid	process	target process
PID 1752 set thread context of 872	1752	Operaciones de Cuenta.exe	caspol.exe

description	ioc	process
File opened for modification	C:\Windows\resources\0409\Ledetekstens\smrokkerne\Slowheartedness.ini	Operaciones de Cuenta.exe

pid	process
1752	Operaciones de Cuenta.exe
1752	Operaciones de Cuenta.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

Operaciones de Cuenta.exe

description	pid	process	target process
PID 1752 wrote to memory of 564	1752	Operaciones de Cuenta.exe	caspol.exe
PID 1752 wrote to memory of 564	1752	Operaciones de Cuenta.exe	caspol.exe
PID 1752 wrote to memory of 564	1752	Operaciones de Cuenta.exe	caspol.exe
PID 1752 wrote to memory of 564	1752	Operaciones de Cuenta.exe	caspol.exe
PID 1752 wrote to memory of 872	1752	Operaciones de Cuenta.exe	caspol.exe
PID 1752 wrote to memory of 872	1752	Operaciones de Cuenta.exe	caspol.exe
PID 1752 wrote to memory of 872	1752	Operaciones de Cuenta.exe	caspol.exe
PID 1752 wrote to memory of 872	1752	Operaciones de Cuenta.exe	caspol.exe
PID 1752 wrote to memory of 872	1752	Operaciones de Cuenta.exe	caspol.exe

C:\Users\Admin\AppData\Local\Temp\Operaciones de Cuenta.exe
"C:\Users\Admin\AppData\Local\Temp\Operaciones de Cuenta.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1752

C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
"C:\Users\Admin\AppData\Local\Temp\Operaciones de Cuenta.exe"
2⤵
PID:564

C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
"C:\Users\Admin\AppData\Local\Temp\Operaciones de Cuenta.exe"
2⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:872

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsy34F7.tmp\AdvSplash.dll
Filesize
6KB

MD5
1871af84805057b5ebc05ee46b56625d

SHA1
50e1c315ad30f5f3f300c7cd9dd0d5d626fe0167

SHA256
62b3db0446750ca9fd693733eec927acc1f50012a47785343286e63b650b7621

SHA512
c1979ee98dfdb807776c439218528d80b4b244a87e692f1538e40f9c2c82db8b77485eb1429325b6f44419bf1f4cd454e43ff381eff077a8b4f4d9eb0d7e54d4

Download Submit
\Users\Admin\AppData\Local\Temp\nsy34F7.tmp\System.dll
Filesize
12KB

MD5
564bb0373067e1785cba7e4c24aab4bf

SHA1
7c9416a01d821b10b2eef97b80899d24014d6fc1

SHA256
7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5

SHA512
22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

Download Submit
memory/872-75-0x00000000012D0000-0x0000000003DF5000-memory.dmp

Filesize
43.1MB

Download
memory/872-76-0x00000000012D0000-0x0000000003DF5000-memory.dmp

Filesize
43.1MB

Download
memory/872-77-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/1752-73-0x00000000057E0000-0x0000000008305000-memory.dmp

Filesize
43.1MB

Download
memory/1752-74-0x00000000057E0000-0x0000000008305000-memory.dmp

Filesize
43.1MB

Download