guloader | 9ae2e398f3c3346697bec12a775d67d2f74cbedf1f8b676df3a967e47a88a7c4

Analysis

max time kernel
147s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
09/05/2023, 07:52

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General

Target

APPROVE FI without value. 08-05-23.exe
Size

169KB
MD5

61283feeb2c28dc764c8427a85c7a8b1
SHA1

d4faefdaebadaaa4dd609504740ab24db6e9769d
SHA256

9ae2e398f3c3346697bec12a775d67d2f74cbedf1f8b676df3a967e47a88a7c4
SHA512

d826491b373af5f425b8fe7b2050ba77e5f0b7754b82e2b6867f943fe8dc902edcdbec830279e6d31e2fe7af9d1a2f44f013efb792519794ad97cf1b3c285aff
SSDEEP

3072:EwJ52Y7ZoH5XJaqKz8HIoLmMXmWz0kmARQ/1k75erJq0uVOusH+wCmDiHo6FsvHt:EwHysqKzL8X50kmARQ/1eerjVuSN1HYW

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Checks QEMU agent file 2 TTPs 1 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	APPROVE FI without value. 08-05-23.exe

Loads dropped DLL 1 IoCs

pid	Process
4192	APPROVE FI without value. 08-05-23.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
4192	APPROVE FI without value. 08-05-23.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4192 set thread context of 2284	4192	APPROVE FI without value. 08-05-23.exe	91

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\Cedre\Mecometer.Smr	APPROVE FI without value. 08-05-23.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
4192	APPROVE FI without value. 08-05-23.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4192 wrote to memory of 2284	4192	APPROVE FI without value. 08-05-23.exe	91
PID 4192 wrote to memory of 2284	4192	APPROVE FI without value. 08-05-23.exe	91
PID 4192 wrote to memory of 2284	4192	APPROVE FI without value. 08-05-23.exe	91
PID 4192 wrote to memory of 2284	4192	APPROVE FI without value. 08-05-23.exe	91

C:\Users\Admin\AppData\Local\Temp\APPROVE FI without value. 08-05-23.exe
"C:\Users\Admin\AppData\Local\Temp\APPROVE FI without value. 08-05-23.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:4192
- C:\Users\Admin\AppData\Local\Temp\APPROVE FI without value. 08-05-23.exe
  "C:\Users\Admin\AppData\Local\Temp\APPROVE FI without value. 08-05-23.exe"
  2⤵
  PID:2284

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

C:\Users\Admin\AppData\Local\Temp\nseEAE3.tmp\System.dll

Filesize
11KB

MD5
a436db0c473a087eb61ff5c53c34ba27

SHA1
65ea67e424e75f5065132b539c8b2eda88aa0506

SHA256
75ed40311875312617d6711baed0be29fcaee71031ca27a8d308a72b15a51e49

SHA512
908f46a855480af6eacb2fb64de0e60b1e04bbb10b23992e2cf38a4cbebdcd7d3928c4c022d7ad9f7479265a8f426b93eef580afec95570e654c360d62f5e08d

Download Submit
memory/2284-146-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2284-148-0x0000000001660000-0x0000000002F48000-memory.dmp

Filesize
24.9MB

Download
memory/4192-145-0x00000000058E0000-0x00000000071C8000-memory.dmp

Filesize
24.9MB

Download
memory/4192-147-0x00000000058E0000-0x00000000071C8000-memory.dmp

Filesize
24.9MB

Download