guloader | 88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491

General

Target

88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
Size

224KB
MD5

9df78bffb685bad609163dcb409f94bf
SHA1

bed934ea2ddc5bcbd971c7f10fb147d74570c7f4
SHA256

88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491
SHA512

9cc7600d4f49b48727f619a39235697ddf891554134b5ac1b27f68fbc16b1b7fc599a0700d05bfaf182050c3d053fb13d2017bb674981c2a10871760b26017df
SSDEEP

3072:yAwC5wP7dePo8fCcHbbARFdPkw6nDEgyYYkQQrFkCwJZ2REcmVv/qNrPjoKXdU4C:yx/MtGFdxUuk5FkdQ6SRjFXYk8/

Score

10^/10

guloader remcos rawraw discovery downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

rawRaw

C2

coto-ar.com:34087

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
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-UODPLC
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

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	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe

Loads dropped DLL 2 IoCs

pid	Process
5052	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
5052	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1722984668-1829624581-3022101259-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1722984668-1829624581-3022101259-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Mancipium = "C:\\Users\\Admin\\AppData\\Roaming\\Tonicen\\Charmers.exe"	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.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
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2960	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5052	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
2960	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5052 set thread context of 2960	5052	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe	87

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\pondet\omtnksomhed\Konjakglas.unr	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
File opened for modification	C:\Program Files (x86)\agosto\biderne.ini	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\mentionless\trinket\lurblsning\Premiating.ini	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
File opened for modification	C:\Windows\maoisterne\Bulldoggens\indkommet.del	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
File opened for modification	C:\Windows\resources\supracargo\Liniediagrammet\Anonymiteterne195\ensilagers.ini	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.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
5052	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5052 wrote to memory of 2960	5052	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe	87
PID 5052 wrote to memory of 2960	5052	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe	87
PID 5052 wrote to memory of 2960	5052	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe	87
PID 5052 wrote to memory of 2960	5052	88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe	87

C:\Users\Admin\AppData\Local\Temp\88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
"C:\Users\Admin\AppData\Local\Temp\88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5052
- C:\Users\Admin\AppData\Local\Temp\88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe
  "C:\Users\Admin\AppData\Local\Temp\88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491.exe"
  2⤵
  - Checks QEMU agent file
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:2960

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Web Service

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsf6C48.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsf6C48.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsf6C48.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
memory/2960-209-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2960-206-0x0000000001660000-0x0000000003C71000-memory.dmp

Filesize
38.1MB

Download
memory/2960-185-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2960-186-0x0000000001660000-0x0000000003C71000-memory.dmp

Filesize
38.1MB

Download
memory/2960-188-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2960-189-0x0000000001660000-0x0000000003C71000-memory.dmp

Filesize
38.1MB

Download
memory/2960-202-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2960-213-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2960-208-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2960-212-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2960-210-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2960-211-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/5052-183-0x00000000063D0000-0x00000000089E1000-memory.dmp

Filesize
38.1MB

Download
memory/5052-184-0x00000000063D0000-0x00000000089E1000-memory.dmp

Filesize
38.1MB

Download

Analysis

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