remcos | cb04e8c4131fdb0b74051052efef4ee111e2b84741cd9d1ce0dec24c4a0079a0

General

Target

Quotation Sheet and PO-including FOB, MOQ.exe
Size

240KB
MD5

575d7ca2e5fc3ff6e2d568ab8c67c5d8
SHA1

9c399b34f7391602b3b70cb7b4b60a1af8d0b65e
SHA256

fd4d0c198aa010dee3d726fe7d7a526725b51404c1684b7df9d520455e5d16ec
SHA512

deaeb797c0667351290b5d84716dee1faeead5228c440b270b1fd18bc805b07e0292206d386807d88337ae388b209d83addf8b3d21542b5ae7c1341233881a92

Score

10^/10

remcos marshal host coreentity rat rezer0

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

MARSHAL HOST

C2

194.5.99.143:6666

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-NTSQI6
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

Processes:

resource	yara_rule
behavioral1/memory/1364-56-0x00000000007F0000-0x00000000007F8000-memory.dmp	coreentity

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1364-57-0x0000000000A80000-0x0000000000AAC000-memory.dmp	rezer0

Suspicious use of SetThreadContext 1 IoCs

Processes:

Quotation Sheet and PO-including FOB, MOQ.exe

description	pid	process	target process
PID 1364 set thread context of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

880 schtasks.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Quotation Sheet and PO-including FOB, MOQ.exe

pid process

1312 Quotation Sheet and PO-including FOB, MOQ.exe

pid	process
880	schtasks.exe

pid	process
1312	Quotation Sheet and PO-including FOB, MOQ.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Quotation Sheet and PO-including FOB, MOQ.exe

C:\Users\Admin\AppData\Local\Temp\Quotation Sheet and PO-including FOB, MOQ.exe
"C:\Users\Admin\AppData\Local\Temp\Quotation Sheet and PO-including FOB, MOQ.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1364

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\UOTSTlVU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp17D5.tmp"
2⤵
- Creates scheduled task(s)
PID:880

C:\Users\Admin\AppData\Local\Temp\Quotation Sheet and PO-including FOB, MOQ.exe
"{path}"
2⤵
- Suspicious use of SetWindowsHookEx
PID:1312

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp17D5.tmp
Filesize
1KB

MD5
933768f9a2536f48bf18c7cb82173cd6

SHA1
2b82e41ea1b318ba96a7a1cea9ad336d448b490b

SHA256
77b46cc404f6b1df3d54702a68a369b271c95651eb91f930b5ebcad8fbb4cbdf

SHA512
91e1cc8d9ab943e16237ebadbb96a77534e1bba67b34ab24e0e339cc6001a699e2ee44851dafd0c6549d91adf22b329c2fb8b12cb4a6210ee6ae1b5063090a01

Download Submit
memory/880-58-0x0000000000000000-mapping.dmp

Download
memory/1312-63-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1312-65-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1312-74-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1312-73-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1312-60-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1312-61-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1312-70-0x0000000000413A84-mapping.dmp

Download
memory/1312-69-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1312-66-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1312-67-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1364-57-0x0000000000A80000-0x0000000000AAC000-memory.dmp

Filesize
176KB

Download
memory/1364-54-0x0000000000AB0000-0x0000000000AF2000-memory.dmp

Filesize
264KB

Download
memory/1364-55-0x0000000075501000-0x0000000075503000-memory.dmp

Filesize
8KB

Download
memory/1364-56-0x00000000007F0000-0x00000000007F8000-memory.dmp

Filesize
32KB

Download

description	pid	process	target process
PID 1364 wrote to memory of 880	1364	Quotation Sheet and PO-including FOB, MOQ.exe	schtasks.exe
PID 1364 wrote to memory of 880	1364	Quotation Sheet and PO-including FOB, MOQ.exe	schtasks.exe
PID 1364 wrote to memory of 880	1364	Quotation Sheet and PO-including FOB, MOQ.exe	schtasks.exe
PID 1364 wrote to memory of 880	1364	Quotation Sheet and PO-including FOB, MOQ.exe	schtasks.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe
PID 1364 wrote to memory of 1312	1364	Quotation Sheet and PO-including FOB, MOQ.exe	Quotation Sheet and PO-including FOB, MOQ.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads