remcos | b4b7eab942bf5ffa93bef1444c82b059d3c18234bcec49df9ec2294bf0ec66bd

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-12-2024 03:45

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General

Target

b4b7eab942bf5ffa93bef1444c82b059d3c18234bcec49df9ec2294bf0ec66bd.exe
Size

819KB
MD5

e4e7b853e87922ff59bcae3527b206f9
SHA1

15e8dc7771a5b9ebeae4b64ccc20a8d9798158c2
SHA256

b4b7eab942bf5ffa93bef1444c82b059d3c18234bcec49df9ec2294bf0ec66bd
SHA512

92406ea4aa0b16b825a776756fd875cc1d224144666c56fe6a7fb3ca6d8f0090adeb3e6e1a07bddd83ef1e2b9dda382fa50738ccb78a3f3f73245a330da8be4c
SSDEEP

12288:3zpSYVj1vkBEu7i6rcdUYH+pIpHjGERkr1w0ZS8atGZnnBIjLNA8xrduQg9eC:9SYkWuO6dcQIpDJ2ZVnaFP5qEC

Score

10^/10

remcos remotehost collection discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

212.162.149.91:2404

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-HSAM04
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/732-80-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4840-79-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4240-85-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/732-80-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4840-79-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2892	powershell.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	msiexec.exe

Blocklisted process makes network request 4 IoCs

flow	pid	Process
15	3280	msiexec.exe
17	3280	msiexec.exe
18	3280	msiexec.exe
20	3280	msiexec.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
3280	msiexec.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2892	powershell.exe
3280	msiexec.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3280 set thread context of 4840	3280	msiexec.exe	91
PID 3280 set thread context of 732	3280	msiexec.exe	93
PID 3280 set thread context of 4240	3280	msiexec.exe	94

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	powershell.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	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b4b7eab942bf5ffa93bef1444c82b059d3c18234bcec49df9ec2294bf0ec66bd.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
2892	powershell.exe
2892	powershell.exe
2892	powershell.exe
2892	powershell.exe
2892	powershell.exe
2892	powershell.exe
2892	powershell.exe
4840	msiexec.exe
4840	msiexec.exe
4240	msiexec.exe
4240	msiexec.exe
4840	msiexec.exe
4840	msiexec.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2892	powershell.exe
3280	msiexec.exe
3280	msiexec.exe
3280	msiexec.exe
3280	msiexec.exe
3280	msiexec.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeDebugPrivilege	2892	powershell.exe
Token: SeIncreaseQuotaPrivilege	2892	powershell.exe
Token: SeSecurityPrivilege	2892	powershell.exe
Token: SeTakeOwnershipPrivilege	2892	powershell.exe
Token: SeLoadDriverPrivilege	2892	powershell.exe
Token: SeSystemProfilePrivilege	2892	powershell.exe
Token: SeSystemtimePrivilege	2892	powershell.exe
Token: SeProfSingleProcessPrivilege	2892	powershell.exe
Token: SeIncBasePriorityPrivilege	2892	powershell.exe
Token: SeCreatePagefilePrivilege	2892	powershell.exe
Token: SeBackupPrivilege	2892	powershell.exe
Token: SeRestorePrivilege	2892	powershell.exe
Token: SeShutdownPrivilege	2892	powershell.exe
Token: SeDebugPrivilege	2892	powershell.exe
Token: SeSystemEnvironmentPrivilege	2892	powershell.exe
Token: SeRemoteShutdownPrivilege	2892	powershell.exe
Token: SeUndockPrivilege	2892	powershell.exe
Token: SeManageVolumePrivilege	2892	powershell.exe
Token: 33	2892	powershell.exe
Token: 34	2892	powershell.exe
Token: 35	2892	powershell.exe
Token: 36	2892	powershell.exe
Token: SeDebugPrivilege	4240	msiexec.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3280	msiexec.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2336 wrote to memory of 2892	2336	b4b7eab942bf5ffa93bef1444c82b059d3c18234bcec49df9ec2294bf0ec66bd.exe	82
PID 2336 wrote to memory of 2892	2336	b4b7eab942bf5ffa93bef1444c82b059d3c18234bcec49df9ec2294bf0ec66bd.exe	82
PID 2336 wrote to memory of 2892	2336	b4b7eab942bf5ffa93bef1444c82b059d3c18234bcec49df9ec2294bf0ec66bd.exe	82
PID 2892 wrote to memory of 3280	2892	powershell.exe	85
PID 2892 wrote to memory of 3280	2892	powershell.exe	85
PID 2892 wrote to memory of 3280	2892	powershell.exe	85
PID 2892 wrote to memory of 3280	2892	powershell.exe	85
PID 3280 wrote to memory of 4024	3280	msiexec.exe	90
PID 3280 wrote to memory of 4024	3280	msiexec.exe	90
PID 3280 wrote to memory of 4024	3280	msiexec.exe	90
PID 3280 wrote to memory of 4840	3280	msiexec.exe	91
PID 3280 wrote to memory of 4840	3280	msiexec.exe	91
PID 3280 wrote to memory of 4840	3280	msiexec.exe	91
PID 3280 wrote to memory of 4840	3280	msiexec.exe	91
PID 3280 wrote to memory of 1416	3280	msiexec.exe	92
PID 3280 wrote to memory of 1416	3280	msiexec.exe	92
PID 3280 wrote to memory of 1416	3280	msiexec.exe	92
PID 3280 wrote to memory of 732	3280	msiexec.exe	93
PID 3280 wrote to memory of 732	3280	msiexec.exe	93
PID 3280 wrote to memory of 732	3280	msiexec.exe	93
PID 3280 wrote to memory of 732	3280	msiexec.exe	93
PID 3280 wrote to memory of 4240	3280	msiexec.exe	94
PID 3280 wrote to memory of 4240	3280	msiexec.exe	94
PID 3280 wrote to memory of 4240	3280	msiexec.exe	94
PID 3280 wrote to memory of 4240	3280	msiexec.exe	94

C:\Users\Admin\AppData\Local\Temp\b4b7eab942bf5ffa93bef1444c82b059d3c18234bcec49df9ec2294bf0ec66bd.exe
"C:\Users\Admin\AppData\Local\Temp\b4b7eab942bf5ffa93bef1444c82b059d3c18234bcec49df9ec2294bf0ec66bd.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2336
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -windowstyle hidden "$Sonnetish=gc -raw 'C:\Users\Admin\AppData\Roaming\afdragsordning\Rygklapperne.Tis225';$Gastriskes=$Sonnetish.SubString(65822,3);.$Gastriskes($Sonnetish)
  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:2892
- - 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 SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3280
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\bjmrhpegersumjetqwsensdmrssg"
      4⤵
      PID:4024
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\bjmrhpegersumjetqwsensdmrssg"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:4840
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\edrjihoisakzwpsxihfgyfxdaybpnobi"
      4⤵
      PID:1416
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\edrjihoisakzwpsxihfgyfxdaybpnobi"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:732
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\oxec"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4240

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:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
4bb28b2eca4ced2bdfaca7ec806d26b3

SHA1
d5b7642f10584e474a81fefc88ab12f914700742

SHA256
42bb6f63b5505aca90ebc4b0b764f4ba45f12e0943413c2f4835996c49e790ae

SHA512
79dff1e25d6a5cd959e4a7cf60ff450de817b2f6e1fefc64c7d93512a8ef6edb39d1545c8f5e542bb800ddca44fcbb9d22df13b8467f7305c2e7388c5c709346

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cni3vyqn.rbq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4KB

MD5
7aca43b2800ceb18b3ed2326532545de

SHA1
d4cf207ef85bd749d59c1cb27a09c167ee21523a

SHA256
3d9f8622d97587fd84d3d0560a50ab38e5f894fe4b5bcaa34279643fdaaeb480

SHA512
0e002e6b8d965c227d9b1aa7c0251619c787ec7717e59667e756e5815e3666a955ea397eb148a1ed6bb7d8045727e4efa656a103f14bc70a03b03f0c91283c2f

Download Submit
C:\Users\Admin\AppData\Roaming\afdragsordning\Fenagles.Chi

Filesize
320KB

MD5
a7f9d7683a801e46e88e7326809863e3

SHA1
d2766e2b71f103611971cb924af246df6a947b59

SHA256
ecc7c894a817724e4841b23fd23290c67bfabb1b7c5ed1073e3ee02697f6b2fd

SHA512
6318dfda7e0b4a7eeacd84375733cff20c4830ae16c93b9e26dab93e51ba87b87de5121dda86a2aff880b0b68c824f388bef90b478d6f67c4d0b78fdd0411eb6

Download Submit
C:\Users\Admin\AppData\Roaming\afdragsordning\Rygklapperne.Tis225

Filesize
66KB

MD5
1280d41310c4a2eeae634ec8dc22fcc8

SHA1
d8a0986cd4fdfaae54ffd0b3b015fecb343a93a9

SHA256
8431f4e8da30962cb0082804b30b01485fb8927e2cbe4012a321aa4e8f09ac1e

SHA512
9644b502efc90a956402aaac90be1961c48d897a74ce60326ba26fa459290f6c714366f2c56e7ef7c0fd31a6a51498d1eb2d74e7b0035f0adfc5f9d24c5a0fc5

Download Submit
memory/732-73-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/732-78-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/732-80-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2892-57-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-63-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-25-0x0000000005E70000-0x0000000005EBC000-memory.dmp

Filesize
304KB

Download
memory/2892-26-0x00000000063A0000-0x0000000006436000-memory.dmp

Filesize
600KB

Download
memory/2892-27-0x0000000006360000-0x000000000637A000-memory.dmp

Filesize
104KB

Download
memory/2892-28-0x0000000006E30000-0x0000000006E52000-memory.dmp

Filesize
136KB

Download
memory/2892-29-0x0000000007480000-0x0000000007A24000-memory.dmp

Filesize
5.6MB

Download
memory/2892-23-0x0000000005850000-0x0000000005BA4000-memory.dmp

Filesize
3.3MB

Download
memory/2892-31-0x00000000080B0000-0x000000000872A000-memory.dmp

Filesize
6.5MB

Download
memory/2892-33-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-32-0x0000000007030000-0x0000000007062000-memory.dmp

Filesize
200KB

Download
memory/2892-34-0x0000000070F20000-0x0000000070F6C000-memory.dmp

Filesize
304KB

Download
memory/2892-44-0x0000000007270000-0x000000000728E000-memory.dmp

Filesize
120KB

Download
memory/2892-45-0x00000000072A0000-0x0000000007343000-memory.dmp

Filesize
652KB

Download
memory/2892-46-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-48-0x00000000073A0000-0x00000000073AA000-memory.dmp

Filesize
40KB

Download
memory/2892-47-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-49-0x00000000073C0000-0x00000000073D1000-memory.dmp

Filesize
68KB

Download
memory/2892-50-0x0000000007410000-0x000000000741E000-memory.dmp

Filesize
56KB

Download
memory/2892-51-0x0000000007420000-0x0000000007434000-memory.dmp

Filesize
80KB

Download
memory/2892-52-0x0000000007460000-0x000000000747A000-memory.dmp

Filesize
104KB

Download
memory/2892-53-0x0000000007450000-0x0000000007458000-memory.dmp

Filesize
32KB

Download
memory/2892-54-0x0000000007B70000-0x0000000007B9A000-memory.dmp

Filesize
168KB

Download
memory/2892-55-0x0000000007BA0000-0x0000000007BC4000-memory.dmp

Filesize
144KB

Download
memory/2892-56-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-7-0x000000007510E000-0x000000007510F000-memory.dmp

Filesize
4KB

Download
memory/2892-13-0x00000000057E0000-0x0000000005846000-memory.dmp

Filesize
408KB

Download
memory/2892-59-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-60-0x000000007510E000-0x000000007510F000-memory.dmp

Filesize
4KB

Download
memory/2892-62-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-61-0x0000000008730000-0x000000000A1C6000-memory.dmp

Filesize
26.6MB

Download
memory/2892-24-0x0000000005E30000-0x0000000005E4E000-memory.dmp

Filesize
120KB

Download
memory/2892-64-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-65-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-66-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-8-0x0000000002860000-0x0000000002896000-memory.dmp

Filesize
216KB

Download
memory/2892-10-0x0000000005140000-0x0000000005768000-memory.dmp

Filesize
6.2MB

Download
memory/2892-12-0x0000000005770000-0x00000000057D6000-memory.dmp

Filesize
408KB

Download
memory/2892-9-0x0000000075100000-0x00000000758B0000-memory.dmp

Filesize
7.7MB

Download
memory/2892-11-0x0000000004E60000-0x0000000004E82000-memory.dmp

Filesize
136KB

Download
memory/3280-106-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-100-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-93-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-67-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-97-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-114-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-103-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-88-0x000000001F710000-0x000000001F729000-memory.dmp

Filesize
100KB

Download
memory/3280-92-0x000000001F710000-0x000000001F729000-memory.dmp

Filesize
100KB

Download
memory/3280-91-0x000000001F710000-0x000000001F729000-memory.dmp

Filesize
100KB

Download
memory/3280-129-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-126-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-120-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/3280-117-0x0000000001010000-0x0000000002264000-memory.dmp

Filesize
18.3MB

Download
memory/4240-84-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4240-77-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4240-85-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4840-72-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4840-74-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4840-79-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4840-76-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download