guloader | c69e558e5526feeb00ab90efe764fb0b93b3a09692659d1a57c652da81f1d123

Analysis

max time kernel
179s
max time network
203s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
20/04/2023, 10:17

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General

Target

justificante de transferencia.exe
Size

439KB
MD5

3931436d54a7af5e532612c3f3e06fc0
SHA1

eb3692c150cc7f8ecea9522b314e50e82c902209
SHA256

c69e558e5526feeb00ab90efe764fb0b93b3a09692659d1a57c652da81f1d123
SHA512

4881726bb3734022c79b3929e0719251986a656cf0ac18b0b3825b0da74a8877fabdd1382b956ef2f6af3a6418435aba5b2dbb7d113eb209dfbac235127c9552
SSDEEP

12288:gz1KzffDfffr2c0kz0hS19NTivjlmJdio3qH:FffDfffrrzES19NTivjlmnV0

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

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	justificante de transferencia.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	caspol.exe

Loads dropped DLL 1 IoCs

pid	Process
2044	justificante de transferencia.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2044	justificante de transferencia.exe
900	caspol.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2044 set thread context of 900	2044	justificante de transferencia.exe	28

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Straffenes\Psychoses.Pel	justificante de transferencia.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 1 IoCs

pid	Process
2044	justificante de transferencia.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2044 wrote to memory of 900	2044	justificante de transferencia.exe	28
PID 2044 wrote to memory of 900	2044	justificante de transferencia.exe	28
PID 2044 wrote to memory of 900	2044	justificante de transferencia.exe	28
PID 2044 wrote to memory of 900	2044	justificante de transferencia.exe	28
PID 2044 wrote to memory of 900	2044	justificante de transferencia.exe	28

C:\Users\Admin\AppData\Local\Temp\justificante de transferencia.exe
"C:\Users\Admin\AppData\Local\Temp\justificante de transferencia.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:2044
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
  "C:\Users\Admin\AppData\Local\Temp\justificante de transferencia.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsoCBDA.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/900-65-0x0000000001210000-0x0000000002C88000-memory.dmp

Filesize
26.5MB

Download
memory/900-66-0x0000000000400000-0x0000000000615000-memory.dmp

Filesize
2.1MB

Download
memory/900-67-0x0000000001210000-0x0000000002C88000-memory.dmp

Filesize
26.5MB

Download
memory/2044-63-0x0000000002E40000-0x00000000048B8000-memory.dmp

Filesize
26.5MB

Download
memory/2044-64-0x0000000002E40000-0x00000000048B8000-memory.dmp

Filesize
26.5MB

Download