remcos | 13bde9ef7157ee47c6906c69e6fe0d810b04ce60b8b4f2e74743da33e526dbf2

General

Target

SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
Size

35KB
MD5

741ae9506bfb256797b80215497abbd8
SHA1

b637b9f383276cf58a6d0c2190213e6df681821f
SHA256

13bde9ef7157ee47c6906c69e6fe0d810b04ce60b8b4f2e74743da33e526dbf2
SHA512

bd0e675ca7dcfa64521ab67a01edcaff601a4dd6b696337d26f3d6c1bfa3be250ed739283ae634a016585ce56a40cb555144c53815009c7f3d1b902a9f2622c0

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

wedsazxcvfghyuiokjhbnvfcdsaweyplmhbvrtud.ydns.eu:1996

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

2104 win.exe
852 win.exe

pid	process
2104	win.exe
852	win.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exewin.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\win.exe\""	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	win.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\win = "\"C:\\Users\\Admin\\AppData\\Roaming\\win.exe\""	win.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 28 IoCs

Processes:

SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exewin.exe

pid	process
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe
2104	win.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exewin.exe

description	pid	process	target process
PID 1064 set thread context of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 2104 set thread context of 852	2104	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

3332 1064 WerFault.exe SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
3836 2104 WerFault.exe win.exe
Delays execution with timeout.exe 2 IoCs
evasion

Processes:

timeout.exetimeout.exe

pid process

200 timeout.exe
856 timeout.exe

pid	pid_target	process	target process
3332	1064	WerFault.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
3836	2104	WerFault.exe	win.exe

pid	process
200	timeout.exe
856	timeout.exe

Modifies registry class 1 IoCs

Processes:

SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe

Suspicious behavior: EnumeratesProcesses 35 IoCs

Processes:

SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exeWerFault.exewin.exeWerFault.exe

pid	process
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
3332	WerFault.exe
2104	win.exe
2104	win.exe
2104	win.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe
3836	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

win.exe

pid process

852 win.exe

pid	process
852	win.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exeWerFault.exewin.exeWerFault.exe

description	pid	process
Token: SeDebugPrivilege	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
Token: SeRestorePrivilege	3332	WerFault.exe
Token: SeBackupPrivilege	3332	WerFault.exe
Token: SeDebugPrivilege	3332	WerFault.exe
Token: SeDebugPrivilege	2104	win.exe
Token: SeDebugPrivilege	3836	WerFault.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

win.exe

pid process

852 win.exe

pid	process
852	win.exe

Suspicious use of WriteProcessMemory 41 IoCs

Processes:

SecuriteInfo.com.Variant.Bulz.368783.31325.6282.execmd.exeSecuriteInfo.com.Variant.Bulz.368783.31325.6282.exeWScript.execmd.exewin.execmd.exe

description	pid	process	target process
PID 1064 wrote to memory of 908	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	cmd.exe
PID 1064 wrote to memory of 908	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	cmd.exe
PID 1064 wrote to memory of 908	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	cmd.exe
PID 908 wrote to memory of 200	908	cmd.exe	timeout.exe
PID 908 wrote to memory of 200	908	cmd.exe	timeout.exe
PID 908 wrote to memory of 200	908	cmd.exe	timeout.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1064 wrote to memory of 1984	1064	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
PID 1984 wrote to memory of 1584	1984	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	WScript.exe
PID 1984 wrote to memory of 1584	1984	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	WScript.exe
PID 1984 wrote to memory of 1584	1984	SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe	WScript.exe
PID 1584 wrote to memory of 2268	1584	WScript.exe	cmd.exe
PID 1584 wrote to memory of 2268	1584	WScript.exe	cmd.exe
PID 1584 wrote to memory of 2268	1584	WScript.exe	cmd.exe
PID 2268 wrote to memory of 2104	2268	cmd.exe	win.exe
PID 2268 wrote to memory of 2104	2268	cmd.exe	win.exe
PID 2268 wrote to memory of 2104	2268	cmd.exe	win.exe
PID 2104 wrote to memory of 3456	2104	win.exe	cmd.exe
PID 2104 wrote to memory of 3456	2104	win.exe	cmd.exe
PID 2104 wrote to memory of 3456	2104	win.exe	cmd.exe
PID 3456 wrote to memory of 856	3456	cmd.exe	timeout.exe
PID 3456 wrote to memory of 856	3456	cmd.exe	timeout.exe
PID 3456 wrote to memory of 856	3456	cmd.exe	timeout.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe
PID 2104 wrote to memory of 852	2104	win.exe	win.exe

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1064

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 1
2⤵
- Suspicious use of WriteProcessMemory
PID:908

C:\Windows\SysWOW64\timeout.exe
timeout 1
3⤵
- Delays execution with timeout.exe
PID:200

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Variant.Bulz.368783.31325.6282.exe"
2⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:1584

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\win.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:2268

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:2104

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c timeout 1
6⤵
- Suspicious use of WriteProcessMemory
PID:3456

C:\Windows\SysWOW64\timeout.exe
timeout 1
7⤵
- Delays execution with timeout.exe
PID:856

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:852

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2104 -s 1836
6⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3836

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1064 -s 1836
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3332

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

Replay Monitor

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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
741ae9506bfb256797b80215497abbd8

SHA1
b637b9f383276cf58a6d0c2190213e6df681821f

SHA256
13bde9ef7157ee47c6906c69e6fe0d810b04ce60b8b4f2e74743da33e526dbf2

SHA512
bd0e675ca7dcfa64521ab67a01edcaff601a4dd6b696337d26f3d6c1bfa3be250ed739283ae634a016585ce56a40cb555144c53815009c7f3d1b902a9f2622c0

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
MD5
741ae9506bfb256797b80215497abbd8

SHA1
b637b9f383276cf58a6d0c2190213e6df681821f

SHA256
13bde9ef7157ee47c6906c69e6fe0d810b04ce60b8b4f2e74743da33e526dbf2

SHA512
bd0e675ca7dcfa64521ab67a01edcaff601a4dd6b696337d26f3d6c1bfa3be250ed739283ae634a016585ce56a40cb555144c53815009c7f3d1b902a9f2622c0

Download Submit
C:\Users\Admin\AppData\Roaming\win.exe
MD5
741ae9506bfb256797b80215497abbd8

SHA1
b637b9f383276cf58a6d0c2190213e6df681821f

SHA256
13bde9ef7157ee47c6906c69e6fe0d810b04ce60b8b4f2e74743da33e526dbf2

SHA512
bd0e675ca7dcfa64521ab67a01edcaff601a4dd6b696337d26f3d6c1bfa3be250ed739283ae634a016585ce56a40cb555144c53815009c7f3d1b902a9f2622c0

Download Submit
memory/200-9-0x0000000000000000-mapping.dmp

Download
memory/852-31-0x0000000000413FA4-mapping.dmp

Download
memory/852-34-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/856-28-0x0000000000000000-mapping.dmp

Download
memory/908-8-0x0000000000000000-mapping.dmp

Download
memory/1064-7-0x0000000006030000-0x0000000006060000-memory.dmp

Filesize
192KB

Download
memory/1064-10-0x0000000006BE0000-0x0000000006BE1000-memory.dmp

Filesize
4KB

Download
memory/1064-6-0x00000000059A0000-0x00000000059A1000-memory.dmp

Filesize
4KB

Download
memory/1064-5-0x00000000057D0000-0x00000000057D1000-memory.dmp

Filesize
4KB

Download
memory/1064-3-0x0000000000F70000-0x0000000000F71000-memory.dmp

Filesize
4KB

Download
memory/1064-2-0x0000000073460000-0x0000000073B4E000-memory.dmp

Filesize
6.9MB

Download
memory/1584-13-0x0000000000000000-mapping.dmp

Download
memory/1984-12-0x0000000000413FA4-mapping.dmp

Download
memory/1984-11-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1984-16-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2104-21-0x0000000073460000-0x0000000073B4E000-memory.dmp

Filesize
6.9MB

Download
memory/2104-25-0x0000000004A00000-0x0000000004A01000-memory.dmp

Filesize
4KB

Download
memory/2104-18-0x0000000000000000-mapping.dmp

Download
memory/2268-17-0x0000000000000000-mapping.dmp

Download
memory/3332-15-0x0000000004A10000-0x0000000004A11000-memory.dmp

Filesize
4KB

Download
memory/3456-27-0x0000000000000000-mapping.dmp

Download
memory/3836-33-0x0000000004E20000-0x0000000004E21000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads