remcos | 1b6a2988b79150655b57d5df600c7c41fd6aa6bb58a4fe747e4d5fdddd641f8c

Analysis

max time kernel
150s
max time network
150s
platform
windows10_x64
resource
win10v200722
submitted
28/08/2020, 05:47

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General

Target
Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
Size 545KB
Sample200828-lsfhdyad46
SHA256 1b6a2988b79150655b57d5df600c7c41fd6aa6bb58a4fe747e4d5fdddd641f8c
MD5 932fe4709953931599cc6dd849fe1874
SHA1 51a52a391c24cc1b2f5569c81e4318a9080172f1
SHA512 41104b5c5343d225aef572dfab308b5dcc97a79f1771c15345a5aa8d24f38a67aee746a4eb082b47c83247dd97928e027eb8f7e4fe30ca71fea7d4eba37b51c2
MD5 SHA1 SHA512

Score

10^/10

rat remcos persistence

Malware Config

Extracted

Family

remcos

recuperaciondecartera.website:6790

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
2692	PXServiceNet.exe
196	PXServiceNet.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000\Software\Microsoft\Windows\CurrentVersion\Run\MServices = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PXServiceNet.exe\""	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
Key created	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000\Software\Microsoft\Windows\CurrentVersion\Run\	PXServiceNet.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000\Software\Microsoft\Windows\CurrentVersion\Run\MServices = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PXServiceNet.exe\""	PXServiceNet.exe
Key created	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3288 set thread context of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 2692 set thread context of 196	2692	PXServiceNet.exe	80

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ServiceProfiles\LocalService\winhttp\cachev3.dat	svchost.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionTime = 2d5e78ed0f7dd601	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecision = "0"	svchost.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1400429095-533421673-2598934218-1000_Classes\Local Settings	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
2692	PXServiceNet.exe
2692	PXServiceNet.exe
2692	PXServiceNet.exe
2692	PXServiceNet.exe
2692	PXServiceNet.exe
2692	PXServiceNet.exe
2692	PXServiceNet.exe
2692	PXServiceNet.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeShutdownPrivilege	636	svchost.exe
Token: SeCreatePagefilePrivilege	636	svchost.exe
Token: SeDebugPrivilege	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
Token: SeDebugPrivilege	2692	PXServiceNet.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
196	PXServiceNet.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3288 wrote to memory of 3424	3288	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	75
PID 3424 wrote to memory of 4008	3424	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	76
PID 3424 wrote to memory of 4008	3424	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	76
PID 3424 wrote to memory of 4008	3424	Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe	76
PID 4008 wrote to memory of 688	4008	WScript.exe	77
PID 4008 wrote to memory of 688	4008	WScript.exe	77
PID 4008 wrote to memory of 688	4008	WScript.exe	77
PID 688 wrote to memory of 2692	688	cmd.exe	79
PID 688 wrote to memory of 2692	688	cmd.exe	79
PID 688 wrote to memory of 2692	688	cmd.exe	79
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80
PID 2692 wrote to memory of 196	2692	PXServiceNet.exe	80

C:\Users\Admin\AppData\Local\Temp\Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3288
- C:\Users\Admin\AppData\Local\Temp\Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Cobro Juridico_075668325584_526275704_126342146020588310_19956328_09723861113279491_2015318_424058177822_pdf.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3424
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4008
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\System32\PXServiceNet.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:688
    - - C:\Users\Admin\AppData\Roaming\System32\PXServiceNet.exe
        
        C:\Users\Admin\AppData\Roaming\System32\PXServiceNet.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2692
      - C:\Users\Admin\AppData\Roaming\System32\PXServiceNet.exe
        
        "C:\Users\Admin\AppData\Roaming\System32\PXServiceNet.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:196

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:636

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/196-32-0x0000000000400000-0x0000000000420000-memory.dmp

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memory/2692-19-0x0000000073950000-0x000000007403E000-memory.dmp

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memory/3288-6-0x0000000004C40000-0x0000000004CC2000-memory.dmp

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memory/3288-9-0x0000000004B20000-0x0000000004B2E000-memory.dmp

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memory/3288-8-0x0000000004D50000-0x0000000004D62000-memory.dmp

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memory/3288-7-0x0000000004D70000-0x0000000004D71000-memory.dmp

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memory/3288-0-0x0000000073950000-0x000000007403E000-memory.dmp

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memory/3288-5-0x0000000004B30000-0x0000000004B31000-memory.dmp

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memory/3288-4-0x0000000004A20000-0x0000000004A21000-memory.dmp

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memory/3288-3-0x0000000004FD0000-0x0000000004FD1000-memory.dmp

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memory/3288-1-0x0000000000010000-0x0000000000011000-memory.dmp

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memory/3424-12-0x0000000000400000-0x0000000000420000-memory.dmp

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memory/3424-10-0x0000000000400000-0x0000000000420000-memory.dmp

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