remcos | ebb89d7d2ba96d368ef3e3f296ba7ff2e591489e7726a0613c89764b7f654390

General

Target

9583a703274b68a2fb524598b40a87ac.exe
Size

1.8MB
MD5

9583a703274b68a2fb524598b40a87ac
SHA1

ffe41851b9820e5bfd7aad7dadcaf8d4822ba5f1
SHA256

ebb89d7d2ba96d368ef3e3f296ba7ff2e591489e7726a0613c89764b7f654390
SHA512

428550ecc7e4e86d761f662972ac6e67af5f02183d6e762e10e686ce316337f97a43cc44cb32ff42c9296f7e382f8a3fedb28687af224593eab7cbadec2135e6

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

gsyagvxnzmkoplbhduisbagtevcnxmzlopljdgye.ydns.eu:2177

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Executes dropped EXE 2 IoCs

Processes:

win.exewin.exe

pid process

1948 win.exe
2376 win.exe

pid	process
1948	win.exe
2376	win.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

9583a703274b68a2fb524598b40a87ac.exewin.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	9583a703274b68a2fb524598b40a87ac.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\win.exe\""	9583a703274b68a2fb524598b40a87ac.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	win.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\win.exe\""	win.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 25 IoCs

Processes:

9583a703274b68a2fb524598b40a87ac.exewin.exe

pid	process
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
1948	win.exe
1948	win.exe
1948	win.exe
1948	win.exe
1948	win.exe
1948	win.exe
1948	win.exe
1948	win.exe
1948	win.exe
1948	win.exe
1948	win.exe
1948	win.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

9583a703274b68a2fb524598b40a87ac.exewin.exe

description	pid	process	target process
PID 4044 set thread context of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 1948 set thread context of 2376	1948	win.exe	win.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

2092 4044 WerFault.exe 9583a703274b68a2fb524598b40a87ac.exe
4016 1948 WerFault.exe win.exe
Delays execution with timeout.exe 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

2320 timeout.exe
2404 timeout.exe

pid	pid_target	process	target process
2092	4044	WerFault.exe	9583a703274b68a2fb524598b40a87ac.exe
4016	1948	WerFault.exe	win.exe

pid	process
2320	timeout.exe
2404	timeout.exe

Modifies registry class 1 IoCs

Processes:

9583a703274b68a2fb524598b40a87ac.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	9583a703274b68a2fb524598b40a87ac.exe

Suspicious behavior: EnumeratesProcesses 36 IoCs

Processes:

9583a703274b68a2fb524598b40a87ac.exeWerFault.exewin.exeWerFault.exe

pid	process
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
4044	9583a703274b68a2fb524598b40a87ac.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
2092	WerFault.exe
1948	win.exe
1948	win.exe
1948	win.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe
4016	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

win.exe

pid process

2376 win.exe

pid	process
2376	win.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

9583a703274b68a2fb524598b40a87ac.exeWerFault.exewin.exeWerFault.exe

description	pid	process
Token: SeDebugPrivilege	4044	9583a703274b68a2fb524598b40a87ac.exe
Token: SeRestorePrivilege	2092	WerFault.exe
Token: SeBackupPrivilege	2092	WerFault.exe
Token: SeDebugPrivilege	2092	WerFault.exe
Token: SeDebugPrivilege	1948	win.exe
Token: SeDebugPrivilege	4016	WerFault.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

win.exe

pid process

2376 win.exe

pid	process
2376	win.exe

Suspicious use of WriteProcessMemory 41 IoCs

Processes:

9583a703274b68a2fb524598b40a87ac.execmd.exe9583a703274b68a2fb524598b40a87ac.exeWScript.execmd.exewin.execmd.exe

description	pid	process	target process
PID 4044 wrote to memory of 188	4044	9583a703274b68a2fb524598b40a87ac.exe	cmd.exe
PID 4044 wrote to memory of 188	4044	9583a703274b68a2fb524598b40a87ac.exe	cmd.exe
PID 4044 wrote to memory of 188	4044	9583a703274b68a2fb524598b40a87ac.exe	cmd.exe
PID 188 wrote to memory of 2320	188	cmd.exe	timeout.exe
PID 188 wrote to memory of 2320	188	cmd.exe	timeout.exe
PID 188 wrote to memory of 2320	188	cmd.exe	timeout.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 4044 wrote to memory of 1280	4044	9583a703274b68a2fb524598b40a87ac.exe	9583a703274b68a2fb524598b40a87ac.exe
PID 1280 wrote to memory of 1284	1280	9583a703274b68a2fb524598b40a87ac.exe	WScript.exe
PID 1280 wrote to memory of 1284	1280	9583a703274b68a2fb524598b40a87ac.exe	WScript.exe
PID 1280 wrote to memory of 1284	1280	9583a703274b68a2fb524598b40a87ac.exe	WScript.exe
PID 1284 wrote to memory of 3864	1284	WScript.exe	cmd.exe
PID 1284 wrote to memory of 3864	1284	WScript.exe	cmd.exe
PID 1284 wrote to memory of 3864	1284	WScript.exe	cmd.exe
PID 3864 wrote to memory of 1948	3864	cmd.exe	win.exe
PID 3864 wrote to memory of 1948	3864	cmd.exe	win.exe
PID 3864 wrote to memory of 1948	3864	cmd.exe	win.exe
PID 1948 wrote to memory of 3172	1948	win.exe	cmd.exe
PID 1948 wrote to memory of 3172	1948	win.exe	cmd.exe
PID 1948 wrote to memory of 3172	1948	win.exe	cmd.exe
PID 3172 wrote to memory of 2404	3172	cmd.exe	timeout.exe
PID 3172 wrote to memory of 2404	3172	cmd.exe	timeout.exe
PID 3172 wrote to memory of 2404	3172	cmd.exe	timeout.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe
PID 1948 wrote to memory of 2376	1948	win.exe	win.exe

C:\Users\Admin\AppData\Local\Temp\9583a703274b68a2fb524598b40a87ac.exe
"C:\Users\Admin\AppData\Local\Temp\9583a703274b68a2fb524598b40a87ac.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4044

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 1
2⤵
- Suspicious use of WriteProcessMemory
PID:188

C:\Windows\SysWOW64\timeout.exe
timeout 1
3⤵
- Delays execution with timeout.exe
PID:2320

C:\Users\Admin\AppData\Local\Temp\9583a703274b68a2fb524598b40a87ac.exe
"C:\Users\Admin\AppData\Local\Temp\9583a703274b68a2fb524598b40a87ac.exe"
2⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1280

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1284

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\win.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:3864

C:\Users\Admin\AppData\Roaming\win.exe
C:\Users\Admin\AppData\Roaming\win.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:1948

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 1
6⤵
- Suspicious use of WriteProcessMemory
PID:3172

C:\Windows\SysWOW64\timeout.exe
timeout 1
7⤵
- Delays execution with timeout.exe
PID:2404

C:\Users\Admin\AppData\Roaming\win.exe
"C:\Users\Admin\AppData\Roaming\win.exe"
6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1948 -s 1492
6⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4016

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4044 -s 1496
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2092

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
4a74e626596d6e66b4bbc59ee6848f2d

SHA1
047849ac8735ecc0943428c7cd5e00b52eee06ed

SHA256
98bd6dc219a7a3e04d3d67bbec9f0b4d4640831a3a6be0a0078b050041088b0e

SHA512
1cd943482d0f1ce2ffaf6ee4a82895e4d57c52051bb14bbda0548cf072b4c5cbe719d2cdb549b5ae7c0241dd9c68dd9d1674acd26aed684b8145500079cc5403

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
MD5
9583a703274b68a2fb524598b40a87ac

SHA1
ffe41851b9820e5bfd7aad7dadcaf8d4822ba5f1

SHA256
ebb89d7d2ba96d368ef3e3f296ba7ff2e591489e7726a0613c89764b7f654390

SHA512
428550ecc7e4e86d761f662972ac6e67af5f02183d6e762e10e686ce316337f97a43cc44cb32ff42c9296f7e382f8a3fedb28687af224593eab7cbadec2135e6

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
MD5
9583a703274b68a2fb524598b40a87ac

SHA1
ffe41851b9820e5bfd7aad7dadcaf8d4822ba5f1

SHA256
ebb89d7d2ba96d368ef3e3f296ba7ff2e591489e7726a0613c89764b7f654390

SHA512
428550ecc7e4e86d761f662972ac6e67af5f02183d6e762e10e686ce316337f97a43cc44cb32ff42c9296f7e382f8a3fedb28687af224593eab7cbadec2135e6

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
MD5
9583a703274b68a2fb524598b40a87ac

SHA1
ffe41851b9820e5bfd7aad7dadcaf8d4822ba5f1

SHA256
ebb89d7d2ba96d368ef3e3f296ba7ff2e591489e7726a0613c89764b7f654390

SHA512
428550ecc7e4e86d761f662972ac6e67af5f02183d6e762e10e686ce316337f97a43cc44cb32ff42c9296f7e382f8a3fedb28687af224593eab7cbadec2135e6

Download Submit
memory/188-122-0x0000000000000000-mapping.dmp

Download
memory/1280-124-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1280-125-0x0000000000413FA4-mapping.dmp

Download
memory/1280-126-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1284-127-0x0000000000000000-mapping.dmp

Download
memory/1948-142-0x0000000005B10000-0x000000000600E000-memory.dmp

Filesize
5.0MB

Download
memory/1948-130-0x0000000000000000-mapping.dmp

Download
memory/2320-123-0x0000000000000000-mapping.dmp

Download
memory/2376-144-0x0000000000413FA4-mapping.dmp

Download
memory/2376-146-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2404-141-0x0000000000000000-mapping.dmp

Download
memory/3172-140-0x0000000000000000-mapping.dmp

Download
memory/3864-129-0x0000000000000000-mapping.dmp

Download
memory/4044-121-0x00000000053B0000-0x00000000053B1000-memory.dmp

Filesize
4KB

Download
memory/4044-114-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/4044-120-0x0000000005F40000-0x0000000005F41000-memory.dmp

Filesize
4KB

Download
memory/4044-119-0x0000000002D50000-0x0000000002D91000-memory.dmp

Filesize
260KB

Download
memory/4044-118-0x00000000054D0000-0x00000000054D1000-memory.dmp

Filesize
4KB

Download
memory/4044-117-0x0000000005430000-0x0000000005431000-memory.dmp

Filesize
4KB

Download
memory/4044-116-0x0000000005850000-0x0000000005851000-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