guloader | 2222cfde2a4fb474984f2dec6e7819fc722889ede5bb9b6bad905e273c52db80

Resubmissions

11-10-2023 08:53

231011-ktqfqace3x 10

11-10-2023 08:40

231011-kk87gabh4w 10

11-10-2023 08:23

231011-kaf3yada69 10

Analysis

max time kernel
146s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
11-10-2023 08:40

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General

Target

CMR CA4653XT -10-10-2023-7.exe
Size

807KB
MD5

6f7d51ec00fe651601b179d7af7be2cf
SHA1

e199b506d0ac0a5c61af8224f69da19a3940a0dc
SHA256

bc1401e81ad110669077ad7e3f0c57fb80b04b06397e5a4d384c7bb80dec4361
SHA512

97f719f94373e7ed2f38e2915b926176909c9da87cc1d579ee5fd21c347f7b56ae2c614a8ed8ed13872d40ff84f081949915ca74eec2cb348ba8a75c27f046bf
SSDEEP

12288:qYoVFrdkb10/dREKj9g6VdKCRTU9aYTd+PGZb8OQEW+G2DsebUk8s:qYoVHkb6TEiW6VdlTtYTd7p8x/7kF

Score

10^/10

guloader downloader persistence

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Loads dropped DLL 2 IoCs

Processes:

CMR CA4653XT -10-10-2023-7.exe

pid process

4048 CMR CA4653XT -10-10-2023-7.exe
4048 CMR CA4653XT -10-10-2023-7.exe

pid	process
4048	CMR CA4653XT -10-10-2023-7.exe
4048	CMR CA4653XT -10-10-2023-7.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

wab.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3027552071-446050021-1254071215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Forretningsomraadets = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Mllernes35\\Fnugfri.exe"	wab.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

wab.exe

pid process

2916 wab.exe
2916 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

CMR CA4653XT -10-10-2023-7.exewab.exe

pid process

4048 CMR CA4653XT -10-10-2023-7.exe
2916 wab.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

CMR CA4653XT -10-10-2023-7.exe

description pid process target process

PID 4048 set thread context of 2916 4048 CMR CA4653XT -10-10-2023-7.exe wab.exe
Drops file in Program Files directory 1 IoCs

Processes:

CMR CA4653XT -10-10-2023-7.exe

description ioc process

File opened for modification C:\Program Files (x86)\Shashlick\communicated.for CMR CA4653XT -10-10-2023-7.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:

CMR CA4653XT -10-10-2023-7.exe

pid process

4048 CMR CA4653XT -10-10-2023-7.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wab.exe

pid process

2916 wab.exe

pid	process
2916	wab.exe
2916	wab.exe

pid	process
4048	CMR CA4653XT -10-10-2023-7.exe
2916	wab.exe

description	pid	process	target process
PID 4048 set thread context of 2916	4048	CMR CA4653XT -10-10-2023-7.exe	wab.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Shashlick\communicated.for	CMR CA4653XT -10-10-2023-7.exe

pid	process
4048	CMR CA4653XT -10-10-2023-7.exe

pid	process
2916	wab.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

CMR CA4653XT -10-10-2023-7.exe

description	pid	process	target process
PID 4048 wrote to memory of 2916	4048	CMR CA4653XT -10-10-2023-7.exe	wab.exe
PID 4048 wrote to memory of 2916	4048	CMR CA4653XT -10-10-2023-7.exe	wab.exe
PID 4048 wrote to memory of 2916	4048	CMR CA4653XT -10-10-2023-7.exe	wab.exe
PID 4048 wrote to memory of 2916	4048	CMR CA4653XT -10-10-2023-7.exe	wab.exe
PID 4048 wrote to memory of 2916	4048	CMR CA4653XT -10-10-2023-7.exe	wab.exe

C:\Users\Admin\AppData\Local\Temp\CMR CA4653XT -10-10-2023-7.exe
"C:\Users\Admin\AppData\Local\Temp\CMR CA4653XT -10-10-2023-7.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4048

C:\Program Files (x86)\windows mail\wab.exe
"C:\Users\Admin\AppData\Local\Temp\CMR CA4653XT -10-10-2023-7.exe"
2⤵
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:2916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

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\nseC304.tmp\System.dll
Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
C:\Users\Admin\AppData\Local\Temp\nseC304.tmp\System.dll
Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
C:\Users\Admin\AppData\Local\Temp\nseC304.tmp\System.dll
Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
memory/2916-63-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-42-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-30-0x0000000077308000-0x0000000077309000-memory.dmp

Filesize
4KB

Download
memory/2916-31-0x0000000077281000-0x00000000773A1000-memory.dmp

Filesize
1.1MB

Download
memory/2916-33-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-34-0x0000000000CA0000-0x0000000002E77000-memory.dmp

Filesize
33.8MB

Download
memory/2916-36-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-64-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-37-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-38-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-39-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-40-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-41-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-65-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-44-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-45-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-46-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-66-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-48-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-49-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-52-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-53-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-54-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-55-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-56-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-57-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-58-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-59-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-60-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-61-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-62-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-28-0x0000000000CA0000-0x0000000002E77000-memory.dmp

Filesize
33.8MB

Download
memory/2916-35-0x0000000000CA0000-0x0000000002E77000-memory.dmp

Filesize
33.8MB

Download
memory/2916-29-0x0000000000CA0000-0x0000000002E77000-memory.dmp

Filesize
33.8MB

Download
memory/2916-47-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-67-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-68-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-70-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-71-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-72-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-73-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-74-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-75-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-76-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-77-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-78-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-79-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-80-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-81-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-82-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-83-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-85-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-87-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-88-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-89-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-90-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-91-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-92-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-93-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-94-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-95-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-96-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/2916-97-0x0000000072D10000-0x0000000073F64000-memory.dmp

Filesize
18.3MB

Download
memory/4048-24-0x0000000003150000-0x0000000005327000-memory.dmp

Filesize
33.8MB

Download
memory/4048-25-0x0000000003150000-0x0000000005327000-memory.dmp

Filesize
33.8MB

Download
memory/4048-26-0x0000000077281000-0x00000000773A1000-memory.dmp

Filesize
1.1MB

Download
memory/4048-27-0x0000000073F70000-0x0000000073F77000-memory.dmp

Filesize
28KB

Download