remcos | e0d4ce0316734fce0ea0d950f0ff1b4182f1364d581c549a199ac041cfe68ebb

Analysis

max time kernel
149s
max time network
149s
platform
windows10_x64
resource
win10v20201028
submitted
18/12/2020, 16:36

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General

Target
2ae1341d4c27457829929138590f8416.exe
Size 2.1MB
Sample201218-4aanbra4hx
SHA256 e0d4ce0316734fce0ea0d950f0ff1b4182f1364d581c549a199ac041cfe68ebb
MD5 2ae1341d4c27457829929138590f8416
SHA1 7c7c601a0d87d94faed5804fe93e79387b1389b1
SHA512 0576bae1574139e1734d9f298b15daea589a580400ef018e6353e9ba181f5be0e45d218b581260829f8718c49f11b20d04c19e4da7e8b6c217880e9b6a04ec8d
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

swryijgrvcsgkopnmcdertvgdswbvmophtfdczxs.ydns.eu:2017

Signatures

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

ServiceHost packer 5 IoCs

Detects ServiceHost packer used for .NET malware

resource	yara_rule
behavioral2/memory/696-31-0x0000000000000000-mapping.dmp	servicehost
behavioral2/memory/696-30-0x0000000000000000-mapping.dmp	servicehost
behavioral2/memory/696-32-0x0000000000000000-mapping.dmp	servicehost
behavioral2/memory/696-33-0x0000000000000000-mapping.dmp	servicehost
behavioral2/memory/696-34-0x0000000000000000-mapping.dmp	servicehost

Executes dropped EXE 2 IoCs

pid	Process
696	vlc.exe
3748	vlc.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	vlc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\vlc.exe\""	vlc.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	2ae1341d4c27457829929138590f8416.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\vlc.exe\""	2ae1341d4c27457829929138590f8416.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 10 IoCs

pid	Process
744	2ae1341d4c27457829929138590f8416.exe
744	2ae1341d4c27457829929138590f8416.exe
744	2ae1341d4c27457829929138590f8416.exe
744	2ae1341d4c27457829929138590f8416.exe
744	2ae1341d4c27457829929138590f8416.exe
696	vlc.exe
696	vlc.exe
696	vlc.exe
696	vlc.exe
696	vlc.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 744 set thread context of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 696 set thread context of 3748	696	vlc.exe	83

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2112	696	WerFault.exe	80

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings	2ae1341d4c27457829929138590f8416.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
744	2ae1341d4c27457829929138590f8416.exe
744	2ae1341d4c27457829929138590f8416.exe
744	2ae1341d4c27457829929138590f8416.exe
696	vlc.exe
696	vlc.exe
696	vlc.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe
2112	WerFault.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	744	2ae1341d4c27457829929138590f8416.exe
Token: SeDebugPrivilege	696	vlc.exe
Token: SeRestorePrivilege	2112	WerFault.exe
Token: SeBackupPrivilege	2112	WerFault.exe
Token: SeDebugPrivilege	2112	WerFault.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3748	vlc.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 744 wrote to memory of 2816	744	2ae1341d4c27457829929138590f8416.exe	76
PID 2816 wrote to memory of 3736	2816	2ae1341d4c27457829929138590f8416.exe	77
PID 2816 wrote to memory of 3736	2816	2ae1341d4c27457829929138590f8416.exe	77
PID 2816 wrote to memory of 3736	2816	2ae1341d4c27457829929138590f8416.exe	77
PID 3736 wrote to memory of 2984	3736	WScript.exe	78
PID 3736 wrote to memory of 2984	3736	WScript.exe	78
PID 3736 wrote to memory of 2984	3736	WScript.exe	78
PID 2984 wrote to memory of 696	2984	cmd.exe	80
PID 2984 wrote to memory of 696	2984	cmd.exe	80
PID 2984 wrote to memory of 696	2984	cmd.exe	80
PID 696 wrote to memory of 3748	696	vlc.exe	83
PID 696 wrote to memory of 3748	696	vlc.exe	83
PID 696 wrote to memory of 3748	696	vlc.exe	83
PID 696 wrote to memory of 3748	696	vlc.exe	83
PID 696 wrote to memory of 3748	696	vlc.exe	83
PID 696 wrote to memory of 3748	696	vlc.exe	83
PID 696 wrote to memory of 3748	696	vlc.exe	83
PID 696 wrote to memory of 3748	696	vlc.exe	83
PID 696 wrote to memory of 3748	696	vlc.exe	83
PID 696 wrote to memory of 3748	696	vlc.exe	83

C:\Users\Admin\AppData\Local\Temp\2ae1341d4c27457829929138590f8416.exe
"C:\Users\Admin\AppData\Local\Temp\2ae1341d4c27457829929138590f8416.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:744
- C:\Users\Admin\AppData\Local\Temp\2ae1341d4c27457829929138590f8416.exe
  "C:\Users\Admin\AppData\Local\Temp\2ae1341d4c27457829929138590f8416.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2816
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3736
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\vlc.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2984
    - - C:\Users\Admin\AppData\Roaming\vlc.exe
        
        C:\Users\Admin\AppData\Roaming\vlc.exe
        5⤵
        Executes dropped EXE
        Suspicious use of NtSetInformationThreadHideFromDebugger
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:696
      - C:\Users\Admin\AppData\Roaming\vlc.exe
        
        "C:\Users\Admin\AppData\Roaming\vlc.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:3748
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 696 -s 1048
        6⤵
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2112

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/696-17-0x0000000073A20000-0x000000007410E000-memory.dmp

Download

memory/744-7-0x00000000055C0000-0x00000000055C1000-memory.dmp

Download

memory/744-6-0x0000000002990000-0x00000000029C3000-memory.dmp

Download

memory/744-5-0x0000000002A30000-0x0000000002A31000-memory.dmp

Download

memory/744-3-0x0000000000390000-0x0000000000391000-memory.dmp

Download

memory/744-2-0x0000000073A20000-0x000000007410E000-memory.dmp

Download

memory/2112-27-0x0000000004DF0000-0x0000000004DF1000-memory.dmp

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memory/2816-10-0x0000000000400000-0x0000000000421000-memory.dmp

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memory/2816-8-0x0000000000400000-0x0000000000421000-memory.dmp

Download

memory/3748-26-0x0000000000400000-0x0000000000421000-memory.dmp

Download