remcos | 6ac986e8a1d186735ff4116474abb8de5da5cb51c3cc980bc21c37b4cdeb7b62

Resubmissions

02/05/2023, 11:37

230502-nrl73aah46 7

25/04/2023, 12:30

230425-ppgp8scb5v 10

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
25/04/2023, 12:30

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Report Analysis Logs

General

Target

DOCUMENT.exe
Size

715KB
MD5

6a4400b6d5ded18fff7c2f6886814d0a
SHA1

dc41822acc8edf8d0e130321cbb53f5c1186075a
SHA256

6ac986e8a1d186735ff4116474abb8de5da5cb51c3cc980bc21c37b4cdeb7b62
SHA512

de2fbb159e3318d691040680a6995ac47cbb28428f5a3da80d04d677f7d6614b61f28881566fc5e48be3eb8f90a55d7cd5d1e13514ce9f6c9449db9ee659e5ff
SSDEEP

12288:Gzt8QKGxDsV/VQyD5p0mwzO52MOCwRm+kg+QXLzlTT45P07dNVPv31mdbzf1BRCg:GzKQRxAJLwPm+3PX945INVPdmJf1BUTc

Score

10^/10

remcos remotehost collection discovery rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

155.94.136.202:2404

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-2WTTNV
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

Signatures

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

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1364-113-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/1364-123-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral1/memory/1364-128-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1968-110-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1968-111-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/1968-121-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 8 IoCs

resource	yara_rule
behavioral1/memory/1968-110-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1968-111-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2020-114-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1364-113-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/2020-115-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1968-121-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1364-123-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/1364-128-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft

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

Loads dropped DLL 1 IoCs

pid	Process
948	DOCUMENT.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	DOCUMENT.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
340	DOCUMENT.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
948	DOCUMENT.exe
340	DOCUMENT.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 948 set thread context of 340	948	DOCUMENT.exe	28
PID 340 set thread context of 1968	340	DOCUMENT.exe	31
PID 340 set thread context of 1364	340	DOCUMENT.exe	32
PID 340 set thread context of 2020	340	DOCUMENT.exe	33

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	POWERPNT.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	POWERPNT.EXE
Key created	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Internet Explorer\Toolbar	POWERPNT.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	POWERPNT.EXE
Key created	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	POWERPNT.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	POWERPNT.EXE
Key created	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	POWERPNT.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	POWERPNT.EXE
Key created	\REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Software\Microsoft\Internet Explorer\MenuExt	POWERPNT.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2032	POWERPNT.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1968	DOCUMENT.exe
1968	DOCUMENT.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
948	DOCUMENT.exe
340	DOCUMENT.exe
340	DOCUMENT.exe
340	DOCUMENT.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2020	DOCUMENT.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
340	DOCUMENT.exe
2032	POWERPNT.EXE
2032	POWERPNT.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 948 wrote to memory of 340	948	DOCUMENT.exe	28
PID 948 wrote to memory of 340	948	DOCUMENT.exe	28
PID 948 wrote to memory of 340	948	DOCUMENT.exe	28
PID 948 wrote to memory of 340	948	DOCUMENT.exe	28
PID 948 wrote to memory of 340	948	DOCUMENT.exe	28
PID 340 wrote to memory of 1968	340	DOCUMENT.exe	31
PID 340 wrote to memory of 1968	340	DOCUMENT.exe	31
PID 340 wrote to memory of 1968	340	DOCUMENT.exe	31
PID 340 wrote to memory of 1968	340	DOCUMENT.exe	31
PID 340 wrote to memory of 1364	340	DOCUMENT.exe	32
PID 340 wrote to memory of 1364	340	DOCUMENT.exe	32
PID 340 wrote to memory of 1364	340	DOCUMENT.exe	32
PID 340 wrote to memory of 1364	340	DOCUMENT.exe	32
PID 340 wrote to memory of 2020	340	DOCUMENT.exe	33
PID 340 wrote to memory of 2020	340	DOCUMENT.exe	33
PID 340 wrote to memory of 2020	340	DOCUMENT.exe	33
PID 340 wrote to memory of 2020	340	DOCUMENT.exe	33
PID 2032 wrote to memory of 568	2032	POWERPNT.EXE	35
PID 2032 wrote to memory of 568	2032	POWERPNT.EXE	35
PID 2032 wrote to memory of 568	2032	POWERPNT.EXE	35
PID 2032 wrote to memory of 568	2032	POWERPNT.EXE	35

C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe
"C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:948
- C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe
  "C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:340
- - C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe
    C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe /stext "C:\Users\Admin\AppData\Local\Temp\ljcr"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:1968
- - C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe
    C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe /stext "C:\Users\Admin\AppData\Local\Temp\wlicbez"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1364
- - C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe
    C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe /stext "C:\Users\Admin\AppData\Local\Temp\gfnuuxsvyj"
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2020

C:\Program Files (x86)\Microsoft Office\Office14\POWERPNT.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\POWERPNT.EXE" "C:\Users\Admin\Desktop\PublishSearch.odp"
1⤵
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:568

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Web Service

T1102

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
88dc41cb739a363dabd5afc73a761d16

SHA1
e81652a088dd4174ced99fb593d6b70e9a234c9a

SHA256
0f9867b89960b6e303b717f2acaba135e78182450b52397678e777b5fa58407e

SHA512
5715e3f9a4a98423aa823c5ee4c5592a718c297283193d8d5811dc637f4b3c3799446c0d5ead186c84ce37e19c5a3dff138be7eb6148fefcfa86622081f3d55c

Download Submit
C:\Users\Admin\AppData\Local\Temp\ljcr

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nsd15B5.tmp\System.dll

Filesize
11KB

MD5
c9473cb90d79a374b2ba6040ca16e45c

SHA1
ab95b54f12796dce57210d65f05124a6ed81234a

SHA256
b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352

SHA512
eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

Download Submit
memory/340-94-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-141-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-88-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-98-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-165-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-66-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-162-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-156-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-147-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-92-0x0000000001470000-0x0000000005B16000-memory.dmp

Filesize
70.6MB

Download
memory/340-140-0x0000000036FC0000-0x0000000036FD9000-memory.dmp

Filesize
100KB

Download
memory/340-136-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-65-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-134-0x0000000036FC0000-0x0000000036FD9000-memory.dmp

Filesize
100KB

Download
memory/340-133-0x0000000036FC0000-0x0000000036FD9000-memory.dmp

Filesize
100KB

Download
memory/340-130-0x0000000036FC0000-0x0000000036FD9000-memory.dmp

Filesize
100KB

Download
memory/340-126-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/1364-103-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1364-128-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1364-113-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1364-123-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1364-108-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/1968-110-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1968-121-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1968-101-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1968-105-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1968-111-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2020-106-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2020-112-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2020-114-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2020-115-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2032-146-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download