guloader | 1185cc573b94a0c8fe2b032356de723afed807f6568f15a31fbd18b05b260152

Analysis

max time kernel
147s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
31/12/2024, 18:54

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General

Target

PROFORMA INV BTI39405059_PDF.exe
Size

120KB
MD5

9bff0125ee75813a016a50d69bf733da
SHA1

2926e83c26a210dab8272405b3fd6938e52afbe7
SHA256

b5f925f4de1012dc51fc822718fdee1816e651ec178b88327b3feb1068db13c9
SHA512

ede9a23437a256be28054bb37e77cc92a152262dd40194645a9ef52a3ffc74cc7005de013be78af9d6ccaa60cf0519f389507226ba96e8fe8c353b59f979dc87
SSDEEP

1536:TDkmB3sAiK0kF1JyQmvoTgdJNBbDkeLsKVfHFfwUO4ekqGnD7HECGk/pDk:TYWeKN7crumD6KVfa4e1GnDD//pY

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader family
guloader
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	PROFORMA INV BTI39405059_PDF.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	PROFORMA INV BTI39405059_PDF.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2980	PROFORMA INV BTI39405059_PDF.exe
2660	PROFORMA INV BTI39405059_PDF.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2980 set thread context of 2660	2980	PROFORMA INV BTI39405059_PDF.exe	30

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	PROFORMA INV BTI39405059_PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PROFORMA INV BTI39405059_PDF.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2980	PROFORMA INV BTI39405059_PDF.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2980	PROFORMA INV BTI39405059_PDF.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2980 wrote to memory of 2660	2980	PROFORMA INV BTI39405059_PDF.exe	30
PID 2980 wrote to memory of 2660	2980	PROFORMA INV BTI39405059_PDF.exe	30
PID 2980 wrote to memory of 2660	2980	PROFORMA INV BTI39405059_PDF.exe	30
PID 2980 wrote to memory of 2660	2980	PROFORMA INV BTI39405059_PDF.exe	30
PID 2980 wrote to memory of 2660	2980	PROFORMA INV BTI39405059_PDF.exe	30

C:\Users\Admin\AppData\Local\Temp\PROFORMA INV BTI39405059_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\PROFORMA INV BTI39405059_PDF.exe"
1⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2980
- C:\Users\Admin\AppData\Local\Temp\PROFORMA INV BTI39405059_PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\PROFORMA INV BTI39405059_PDF.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2660-6-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/2660-9-0x0000000076E40000-0x0000000076FE9000-memory.dmp

Filesize
1.7MB

Download
memory/2660-10-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/2660-12-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download
memory/2980-2-0x0000000000290000-0x00000000002A7000-memory.dmp

Filesize
92KB

Download
memory/2980-3-0x0000000076E41000-0x0000000076F42000-memory.dmp

Filesize
1.0MB

Download
memory/2980-4-0x0000000076E40000-0x0000000076FE9000-memory.dmp

Filesize
1.7MB

Download
memory/2980-5-0x0000000000290000-0x00000000002A7000-memory.dmp

Filesize
92KB

Download
memory/2980-8-0x0000000000290000-0x00000000002A7000-memory.dmp

Filesize
92KB

Download