remcos | 4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1

Analysis

max time kernel
31s
max time network
43s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03-10-2024 01:23

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Reason

Machine shutdown

Report Analysis Logs

General

Target

4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe
Size

516KB
MD5

b60c1b642765e2156730e910dbbed55a
SHA1

e0bc18e19d753f1a09611416c8fea46d3453aac7
SHA256

4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1
SHA512

f9bca6ca4cf5f5f06faf58afa65e16897eabe40f981508d6225880d94a629675c834159a31cfaad28bf04003b949d8b054e5b8194b1211f8dc9cdfb9274f21d2
SSDEEP

12288:7813Q9hg+AKfsc/5a+NCGO1UA/DEkINz3WSV/:78lQ96+YcAvwygNz31

Score

10^/10

remcos rem_doc2 discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Rem_doc2

107.173.4.16:2404

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-DSGECX
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

Detected Nirsoft tools 5 IoCs

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

resource	yara_rule
behavioral2/memory/2476-99-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4192-96-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2476-92-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/5032-88-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4192-87-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2476-99-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2476-92-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/5032-88-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4772	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	unpastor.exe

Executes dropped EXE 1 IoCs

pid	Process
5032	unpastor.exe

Loads dropped DLL 1 IoCs

pid	Process
1312	unpastor.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Lecythoid = "%Ajowan% -windowstyle 1 $schillingenes=(gp -Path 'HKCU:\\Software\\Careening\\').Fremlejers;%Ajowan% ($schillingenes)"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1312	unpastor.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4772	powershell.exe
1312	unpastor.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1312 set thread context of 5032	1312	unpastor.exe	96

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\omdigtendes.udd	4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\knytt\Ballistics.mus	4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe
File opened for modification	C:\Windows\resources\villan\Knastakslerne.ini	4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe
File created	C:\Windows\brandbombernes.lnk	4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.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 5 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	unpastor.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4388	reg.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4772	powershell.exe
4772	powershell.exe
4772	powershell.exe
4772	powershell.exe
4772	powershell.exe
4772	powershell.exe
4772	powershell.exe
4772	powershell.exe
4772	powershell.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
4772	powershell.exe
1312	unpastor.exe

Suspicious use of AdjustPrivilegeToken 22 IoCs

description	pid	Process
Token: SeDebugPrivilege	4772	powershell.exe
Token: SeIncreaseQuotaPrivilege	4772	powershell.exe
Token: SeSecurityPrivilege	4772	powershell.exe
Token: SeTakeOwnershipPrivilege	4772	powershell.exe
Token: SeLoadDriverPrivilege	4772	powershell.exe
Token: SeSystemProfilePrivilege	4772	powershell.exe
Token: SeSystemtimePrivilege	4772	powershell.exe
Token: SeProfSingleProcessPrivilege	4772	powershell.exe
Token: SeIncBasePriorityPrivilege	4772	powershell.exe
Token: SeCreatePagefilePrivilege	4772	powershell.exe
Token: SeBackupPrivilege	4772	powershell.exe
Token: SeRestorePrivilege	4772	powershell.exe
Token: SeShutdownPrivilege	4772	powershell.exe
Token: SeDebugPrivilege	4772	powershell.exe
Token: SeSystemEnvironmentPrivilege	4772	powershell.exe
Token: SeRemoteShutdownPrivilege	4772	powershell.exe
Token: SeUndockPrivilege	4772	powershell.exe
Token: SeManageVolumePrivilege	4772	powershell.exe
Token: 33	4772	powershell.exe
Token: 34	4772	powershell.exe
Token: 35	4772	powershell.exe
Token: 36	4772	powershell.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4376 wrote to memory of 4772	4376	4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe	82
PID 4376 wrote to memory of 4772	4376	4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe	82
PID 4376 wrote to memory of 4772	4376	4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe	82
PID 4772 wrote to memory of 1312	4772	powershell.exe	89
PID 4772 wrote to memory of 1312	4772	powershell.exe	89
PID 4772 wrote to memory of 1312	4772	powershell.exe	89
PID 4772 wrote to memory of 1312	4772	powershell.exe	89
PID 1312 wrote to memory of 944	1312	unpastor.exe	92
PID 1312 wrote to memory of 944	1312	unpastor.exe	92
PID 1312 wrote to memory of 944	1312	unpastor.exe	92
PID 944 wrote to memory of 4388	944	cmd.exe	94
PID 944 wrote to memory of 4388	944	cmd.exe	94
PID 944 wrote to memory of 4388	944	cmd.exe	94
PID 1312 wrote to memory of 5032	1312	unpastor.exe	96
PID 1312 wrote to memory of 5032	1312	unpastor.exe	96
PID 1312 wrote to memory of 5032	1312	unpastor.exe	96

C:\Users\Admin\AppData\Local\Temp\4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe
"C:\Users\Admin\AppData\Local\Temp\4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4376
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Enhedens=Get-Content -Raw 'C:\Users\Admin\AppData\Roaming\intercessionate\Favourablies117\sulfonylurea\overcheaply.Dum';$Citronsommerfuglen=$Enhedens.SubString(7497,3);.$Citronsommerfuglen($Enhedens)"
  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:4772
- - C:\Users\Admin\AppData\Local\Temp\unpastor.exe
    "C:\Users\Admin\AppData\Local\Temp\unpastor.exe"
    3⤵
    - Checks computer location settings
    - Loads dropped DLL
    - 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:1312
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Lecythoid" /t REG_EXPAND_SZ /d "%Ajowan% -windowstyle 1 $schillingenes=(gp -Path 'HKCU:\Software\Careening\').Fremlejers;%Ajowan% ($schillingenes)"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:944
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Lecythoid" /t REG_EXPAND_SZ /d "%Ajowan% -windowstyle 1 $schillingenes=(gp -Path 'HKCU:\Software\Careening\').Fremlejers;%Ajowan% ($schillingenes)"
        5⤵
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:4388
  - - C:\Users\Admin\AppData\Local\Temp\unpastor.exe
      C:\Users\Admin\AppData\Local\Temp\unpastor.exe /stext "C:\Users\Admin\AppData\Local\Temp\jsaaqtloepetuzvuurggiroooop"
      4⤵
      Executes dropped EXE
      PID:5032
  - - C:\Users\Admin\AppData\Local\Temp\unpastor.exe
      C:\Users\Admin\AppData\Local\Temp\unpastor.exe /stext "C:\Users\Admin\AppData\Local\Temp\tuntrlwhsxwyxfrglctitwbfwuhqrv"
      4⤵
      PID:2476

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mymp11ou.j31.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\unpastor.exe

Filesize
516KB

MD5
b60c1b642765e2156730e910dbbed55a

SHA1
e0bc18e19d753f1a09611416c8fea46d3453aac7

SHA256
4e11fd9ebcd710646c1c685691837f3e2d4983e9232279ece12a6db9be569ba1

SHA512
f9bca6ca4cf5f5f06faf58afa65e16897eabe40f981508d6225880d94a629675c834159a31cfaad28bf04003b949d8b054e5b8194b1211f8dc9cdfb9274f21d2

Download Submit
C:\Users\Admin\AppData\Local\Temp\unpastor.exe

Filesize
325KB

MD5
6a3361a24f00a3f2c1b6f7a595520053

SHA1
9f464df2122aa2a0e1446414ef51e86a1febf0b8

SHA256
52dc5ba4cb972bca3ee78d3c467cc11294a1765213d3ef8d0086fe536a7cff57

SHA512
dd309b4c38155ad9aeac38080239eb8799357beff6f8747b4fc62cbf0033f93324987be71ccedb410ee7a66ba6a54a409c998f0b2e013dbf5d678aacc24fbe6a

Download Submit
C:\Users\Admin\AppData\Roaming\intercessionate\Favourablies117\sulfonylurea\Operationssygeplejerskers.Afh

Filesize
301KB

MD5
83a716c7db53f1bc1519863863f3ad03

SHA1
c4f3dc4f9db365a1ee5248ec55cff29bad1dab15

SHA256
ef637bbc6c96255229aba75d076a347e7a7d44a81b7464db30f8d3c081ba2116

SHA512
1b8f0fb20374c635fc19e982f0f4b51a096a3b60b2045dae475a20ac7d27be289ecf306714fa2ff8d9d1504ea359505f4376d0cf0ac5b2dd35d63116a5d8f817

Download Submit
C:\Users\Admin\AppData\Roaming\intercessionate\Favourablies117\sulfonylurea\overcheaply.Dum

Filesize
54KB

MD5
5700ab6572287746a87ecdba691baf79

SHA1
5885062f3e65fe332bcf2077bc25323139e60b18

SHA256
e3916adcdcff1f166a6bcd0487b2d725131d275190459841dcd77d869e8f707a

SHA512
7a95bb5aee211653b556da9416709d418c77600c561ed7b5af11b559d5052170b2c93ef8e1c70e14536da01b6ac050f5feba81d04784f232cf54ad92db70b106

Download Submit
memory/1312-71-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/1312-68-0x00000000016C0000-0x0000000002A59000-memory.dmp

Filesize
19.6MB

Download
memory/1312-69-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/1312-70-0x00000000016C0000-0x0000000002A59000-memory.dmp

Filesize
19.6MB

Download
memory/2476-99-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2476-91-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2476-92-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4192-96-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4192-87-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4192-86-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4772-50-0x0000000007590000-0x00000000075BA000-memory.dmp

Filesize
168KB

Download
memory/4772-60-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-32-0x0000000008210000-0x000000000888A000-memory.dmp

Filesize
6.5MB

Download
memory/4772-34-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-35-0x0000000070560000-0x00000000705AC000-memory.dmp

Filesize
304KB

Download
memory/4772-33-0x0000000007290000-0x00000000072C2000-memory.dmp

Filesize
200KB

Download
memory/4772-36-0x00000000706C0000-0x0000000070A14000-memory.dmp

Filesize
3.3MB

Download
memory/4772-46-0x00000000072D0000-0x00000000072EE000-memory.dmp

Filesize
120KB

Download
memory/4772-47-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-48-0x0000000007300000-0x00000000073A3000-memory.dmp

Filesize
652KB

Download
memory/4772-49-0x0000000007400000-0x000000000740A000-memory.dmp

Filesize
40KB

Download
memory/4772-7-0x00000000740DE000-0x00000000740DF000-memory.dmp

Filesize
4KB

Download
memory/4772-51-0x0000000007B90000-0x0000000007BB4000-memory.dmp

Filesize
144KB

Download
memory/4772-52-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-54-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-29-0x00000000063A0000-0x00000000063C2000-memory.dmp

Filesize
136KB

Download
memory/4772-56-0x00000000740DE000-0x00000000740DF000-memory.dmp

Filesize
4KB

Download
memory/4772-57-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-58-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-30-0x00000000075E0000-0x0000000007B84000-memory.dmp

Filesize
5.6MB

Download
memory/4772-59-0x0000000008890000-0x0000000009C29000-memory.dmp

Filesize
19.6MB

Download
memory/4772-61-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-62-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-63-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-66-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-28-0x0000000006330000-0x000000000634A000-memory.dmp

Filesize
104KB

Download
memory/4772-27-0x0000000006F90000-0x0000000007026000-memory.dmp

Filesize
600KB

Download
memory/4772-26-0x0000000005E90000-0x0000000005EDC000-memory.dmp

Filesize
304KB

Download
memory/4772-25-0x0000000005E40000-0x0000000005E5E000-memory.dmp

Filesize
120KB

Download
memory/4772-24-0x0000000005970000-0x0000000005CC4000-memory.dmp

Filesize
3.3MB

Download
memory/4772-19-0x00000000057E0000-0x0000000005846000-memory.dmp

Filesize
408KB

Download
memory/4772-13-0x0000000005770000-0x00000000057D6000-memory.dmp

Filesize
408KB

Download
memory/4772-12-0x0000000004E80000-0x0000000004EA2000-memory.dmp

Filesize
136KB

Download
memory/4772-9-0x0000000004F10000-0x0000000005538000-memory.dmp

Filesize
6.2MB

Download
memory/4772-8-0x00000000048A0000-0x00000000048D6000-memory.dmp

Filesize
216KB

Download
memory/4772-10-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/4772-11-0x00000000740D0000-0x0000000074880000-memory.dmp

Filesize
7.7MB

Download
memory/5032-88-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads