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
592s
max time network
458s
platform
windows10-1703_x64
resource
win10-20230915-en
resource tags

arch:x64arch:x86image:win10-20230915-enlocale:en-usos:windows10-1703-x64system
submitted
11-10-2023 08:53

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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 remcos crypted downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Crypted

ourt2949aslumes9.duckdns.org:2401

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
keylog_crypt
false
keylog_file
paqlgkfs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
ourvbpld-RBN2WW
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
take_screenshot_option
false
take_screenshot_time
5

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Loads dropped DLL 2 IoCs

Processes:

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

pid process

4224 CMR CA4653XT -10-10-2023-7.exe
4224 CMR CA4653XT -10-10-2023-7.exe

pid	process
4224	CMR CA4653XT -10-10-2023-7.exe
4224	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-1-5-21-844837608-3875958368-2945961404-1000\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

4848 wab.exe
4848 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

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

pid process

4224 CMR CA4653XT -10-10-2023-7.exe
4848 wab.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

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

description pid process target process

PID 4224 set thread context of 4848 4224 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

4224 CMR CA4653XT -10-10-2023-7.exe

pid	process
4848	wab.exe
4848	wab.exe

pid	process
4224	CMR CA4653XT -10-10-2023-7.exe
4848	wab.exe

description	pid	process	target process
PID 4224 set thread context of 4848	4224	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
4224	CMR CA4653XT -10-10-2023-7.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

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

description	pid	process	target process
PID 4224 wrote to memory of 4848	4224	CMR CA4653XT -10-10-2023-7.exe	wab.exe
PID 4224 wrote to memory of 4848	4224	CMR CA4653XT -10-10-2023-7.exe	wab.exe
PID 4224 wrote to memory of 4848	4224	CMR CA4653XT -10-10-2023-7.exe	wab.exe
PID 4224 wrote to memory of 4848	4224	CMR CA4653XT -10-10-2023-7.exe	wab.exe
PID 4224 wrote to memory of 4848	4224	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:4224

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
PID:4848

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\nshFD1F.tmp\System.dll
Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
\Users\Admin\AppData\Local\Temp\nshFD1F.tmp\System.dll
Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
\Users\Admin\AppData\Local\Temp\nshFD1F.tmp\System.dll
Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
memory/4224-24-0x00000000030B0000-0x0000000005287000-memory.dmp

Filesize
33.8MB

Download
memory/4224-25-0x00000000030B0000-0x0000000005287000-memory.dmp

Filesize
33.8MB

Download
memory/4224-26-0x00007FFAF06B0000-0x00007FFAF088B000-memory.dmp

Filesize
1.9MB

Download
memory/4224-27-0x0000000077611000-0x0000000077724000-memory.dmp

Filesize
1.1MB

Download
memory/4224-28-0x0000000073580000-0x0000000073587000-memory.dmp

Filesize
28KB

Download
memory/4848-29-0x00000000030F0000-0x00000000052C7000-memory.dmp

Filesize
33.8MB

Download
memory/4848-7117-0x00000000030F0000-0x00000000052C7000-memory.dmp

Filesize
33.8MB

Download
memory/4848-21723-0x00007FFAF06B0000-0x00007FFAF088B000-memory.dmp

Filesize
1.9MB

Download
memory/4848-98540-0x0000000077696000-0x0000000077697000-memory.dmp

Filesize
4KB

Download
memory/4848-103208-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-120270-0x0000000077611000-0x0000000077724000-memory.dmp

Filesize
1.1MB

Download
memory/4848-164373-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-175775-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-186940-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-196179-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-207118-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-219139-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-229389-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-240298-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-250336-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-260520-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-272276-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-283246-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-292756-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-303527-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-314782-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323071-0x00000000030F0000-0x00000000052C7000-memory.dmp

Filesize
33.8MB

Download
memory/4848-323094-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323120-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323127-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323133-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323163-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323171-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323178-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323197-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323204-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323211-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323219-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323223-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323228-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323235-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323242-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323252-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323259-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323268-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323274-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323282-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323288-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323294-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323300-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323313-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323322-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323330-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323346-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323355-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323354-0x00000000030F0000-0x00000000052C7000-memory.dmp

Filesize
33.8MB

Download
memory/4848-323362-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323371-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323387-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323395-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323406-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323415-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323422-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323428-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323432-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323439-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323445-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323451-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323458-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323465-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323486-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323499-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323524-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323535-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323552-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323580-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323600-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323608-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323630-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323638-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323653-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download
memory/4848-323659-0x00000000721F0000-0x0000000073573000-memory.dmp

Filesize
19.5MB

Download