remcos | 587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

General

Target

Factura Serfinanza050288227788749652817960744.exe
Size

1.9MB
MD5

65a849e00f8a9851b36707d010d5f644
SHA1

451b90dab257396edebab0d6ef58eb62bd6cf25b
SHA256

587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839
SHA512

588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

databasepropersonombrecomercialideasearchwords.services:3521

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 3 IoCs

Processes:

PxxoServicesTrialNet1.exePxxoServicesTrialNet1.exePxxoServicesTrialNet1.exe

pid process

3756 PxxoServicesTrialNet1.exe
576 PxxoServicesTrialNet1.exe
1288 PxxoServicesTrialNet1.exe

pid	process
3756	PxxoServicesTrialNet1.exe
576	PxxoServicesTrialNet1.exe
1288	PxxoServicesTrialNet1.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Factura Serfinanza050288227788749652817960744.exePxxoServicesTrialNet1.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Factura Serfinanza050288227788749652817960744.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\MservicesOrg2 = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PxxoServicesTrialNet1.exe\""	Factura Serfinanza050288227788749652817960744.exe
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\	PxxoServicesTrialNet1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\MservicesOrg2 = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PxxoServicesTrialNet1.exe\""	PxxoServicesTrialNet1.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 24 IoCs

Processes:

Factura Serfinanza050288227788749652817960744.exePxxoServicesTrialNet1.exe

pid	process
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

Factura Serfinanza050288227788749652817960744.exePxxoServicesTrialNet1.exe

description	pid	process	target process
PID 3656 set thread context of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3756 set thread context of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

3432 3656 WerFault.exe Factura Serfinanza050288227788749652817960744.exe
1580 3756 WerFault.exe PxxoServicesTrialNet1.exe
Delays execution with timeout.exe 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

3628 timeout.exe
1172 timeout.exe

pid	pid_target	process	target process
3432	3656	WerFault.exe	Factura Serfinanza050288227788749652817960744.exe
1580	3756	WerFault.exe	PxxoServicesTrialNet1.exe

pid	process
3628	timeout.exe
1172	timeout.exe

Modifies registry class 1 IoCs

Processes:

Factura Serfinanza050288227788749652817960744.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings	Factura Serfinanza050288227788749652817960744.exe

Suspicious behavior: EnumeratesProcesses 40 IoCs

Processes:

Factura Serfinanza050288227788749652817960744.exeWerFault.exePxxoServicesTrialNet1.exeWerFault.exe

pid	process
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3656	Factura Serfinanza050288227788749652817960744.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3432	WerFault.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
3756	PxxoServicesTrialNet1.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe
1580	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

PxxoServicesTrialNet1.exe

pid process

1288 PxxoServicesTrialNet1.exe

pid	process
1288	PxxoServicesTrialNet1.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

Factura Serfinanza050288227788749652817960744.exeWerFault.exePxxoServicesTrialNet1.exeWerFault.exe

description	pid	process
Token: SeDebugPrivilege	3656	Factura Serfinanza050288227788749652817960744.exe
Token: SeRestorePrivilege	3432	WerFault.exe
Token: SeBackupPrivilege	3432	WerFault.exe
Token: SeDebugPrivilege	3432	WerFault.exe
Token: SeDebugPrivilege	3756	PxxoServicesTrialNet1.exe
Token: SeDebugPrivilege	1580	WerFault.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

PxxoServicesTrialNet1.exe

pid process

1288 PxxoServicesTrialNet1.exe

pid	process
1288	PxxoServicesTrialNet1.exe

Suspicious use of WriteProcessMemory 47 IoCs

Processes:

Factura Serfinanza050288227788749652817960744.execmd.exeFactura Serfinanza050288227788749652817960744.exeWScript.execmd.exePxxoServicesTrialNet1.execmd.exe

description	pid	process	target process
PID 3656 wrote to memory of 3484	3656	Factura Serfinanza050288227788749652817960744.exe	cmd.exe
PID 3656 wrote to memory of 3484	3656	Factura Serfinanza050288227788749652817960744.exe	cmd.exe
PID 3656 wrote to memory of 3484	3656	Factura Serfinanza050288227788749652817960744.exe	cmd.exe
PID 3484 wrote to memory of 3628	3484	cmd.exe	timeout.exe
PID 3484 wrote to memory of 3628	3484	cmd.exe	timeout.exe
PID 3484 wrote to memory of 3628	3484	cmd.exe	timeout.exe
PID 3656 wrote to memory of 1296	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1296	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1296	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 3656 wrote to memory of 1008	3656	Factura Serfinanza050288227788749652817960744.exe	Factura Serfinanza050288227788749652817960744.exe
PID 1008 wrote to memory of 3088	1008	Factura Serfinanza050288227788749652817960744.exe	WScript.exe
PID 1008 wrote to memory of 3088	1008	Factura Serfinanza050288227788749652817960744.exe	WScript.exe
PID 1008 wrote to memory of 3088	1008	Factura Serfinanza050288227788749652817960744.exe	WScript.exe
PID 3088 wrote to memory of 1220	3088	WScript.exe	cmd.exe
PID 3088 wrote to memory of 1220	3088	WScript.exe	cmd.exe
PID 3088 wrote to memory of 1220	3088	WScript.exe	cmd.exe
PID 1220 wrote to memory of 3756	1220	cmd.exe	PxxoServicesTrialNet1.exe
PID 1220 wrote to memory of 3756	1220	cmd.exe	PxxoServicesTrialNet1.exe
PID 1220 wrote to memory of 3756	1220	cmd.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1768	3756	PxxoServicesTrialNet1.exe	cmd.exe
PID 3756 wrote to memory of 1768	3756	PxxoServicesTrialNet1.exe	cmd.exe
PID 3756 wrote to memory of 1768	3756	PxxoServicesTrialNet1.exe	cmd.exe
PID 1768 wrote to memory of 1172	1768	cmd.exe	timeout.exe
PID 1768 wrote to memory of 1172	1768	cmd.exe	timeout.exe
PID 1768 wrote to memory of 1172	1768	cmd.exe	timeout.exe
PID 3756 wrote to memory of 576	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 576	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 576	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe
PID 3756 wrote to memory of 1288	3756	PxxoServicesTrialNet1.exe	PxxoServicesTrialNet1.exe

C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe
"C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3656

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 1
2⤵
- Suspicious use of WriteProcessMemory
PID:3484

C:\Windows\SysWOW64\timeout.exe
timeout 1
3⤵
- Delays execution with timeout.exe
PID:3628

C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe
"C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe"
2⤵
PID:1296

C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe
"C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza050288227788749652817960744.exe"
2⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1008

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:3088

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:1220

C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.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:3756

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 1
6⤵
- Suspicious use of WriteProcessMemory
PID:1768

C:\Windows\SysWOW64\timeout.exe
timeout 1
7⤵
- Delays execution with timeout.exe
PID:1172

C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
"C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
6⤵
- Executes dropped EXE
PID:576

C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
"C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:1288

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3756 -s 1476
6⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1580

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3656 -s 1464
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3432

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs
MD5
a39af763b1c09ead3c98a6a615f377fe

SHA1
9bd3d39c89e47fe7072270ecc80b810103235c03

SHA256
a3930d7535eb768523ee52bbe69f13f857a0ae0f982d7bfc354d802f21010f8f

SHA512
3ed8e33ac95fd2536286b4afb2ed2a082bb5f98843478262b32263a14a5dbe0425de7b8d9662a5e482b207ebf8484ace8009ecd1881a6f6f8b0ccf3b0fdfe5da

Download Submit
C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
MD5
65a849e00f8a9851b36707d010d5f644

SHA1
451b90dab257396edebab0d6ef58eb62bd6cf25b

SHA256
587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

SHA512
588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

Download Submit
C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
MD5
65a849e00f8a9851b36707d010d5f644

SHA1
451b90dab257396edebab0d6ef58eb62bd6cf25b

SHA256
587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

SHA512
588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

Download Submit
C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
MD5
65a849e00f8a9851b36707d010d5f644

SHA1
451b90dab257396edebab0d6ef58eb62bd6cf25b

SHA256
587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

SHA512
588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

Download Submit
C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet1.exe
MD5
65a849e00f8a9851b36707d010d5f644

SHA1
451b90dab257396edebab0d6ef58eb62bd6cf25b

SHA256
587df9036ffed6807865686f406ff26511a466562129803f75c5b8cd7e0f9839

SHA512
588eae1907460475f68bb17783fb813dd4004ee9759b177e62efe1e22843796fee611082fa1873adf079e30523331d1f18be4295dca6fcef42002c806fb1bd2d

Download Submit
memory/1008-126-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1008-122-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1008-123-0x0000000000413FA4-mapping.dmp

Download
memory/1172-136-0x0000000000000000-mapping.dmp

Download
memory/1220-127-0x0000000000000000-mapping.dmp

Download
memory/1288-141-0x0000000000413FA4-mapping.dmp

Download
memory/1288-143-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1768-135-0x0000000000000000-mapping.dmp

Download
memory/3088-124-0x0000000000000000-mapping.dmp

Download
memory/3484-119-0x0000000000000000-mapping.dmp

Download
memory/3628-120-0x0000000000000000-mapping.dmp

Download
memory/3656-116-0x0000000004BB0000-0x0000000004BB1000-memory.dmp

Filesize
4KB

Download
memory/3656-114-0x0000000000170000-0x0000000000171000-memory.dmp

Filesize
4KB

Download
memory/3656-118-0x0000000005FB0000-0x0000000005FB1000-memory.dmp

Filesize
4KB

Download
memory/3656-117-0x0000000002500000-0x0000000002540000-memory.dmp

Filesize
256KB

Download
memory/3656-121-0x0000000006DD0000-0x0000000006DD1000-memory.dmp

Filesize
4KB

Download
memory/3756-128-0x0000000000000000-mapping.dmp

Download
memory/3756-137-0x0000000006CC0000-0x0000000006CC1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads