remcos | 38083f328ed0cc2811ae4de57a23e659461b545efbaaad13e5a2abb7e3bccc27

General

Target

New_Payment_Advice-04-08-2021.exe
Size

1.1MB
MD5

b406cc9e628e1622fdeb6c19bc119869
SHA1

8154bf8ee1d7c43ce0743dee7c5d102e91dbea78
SHA256

a16800dbbc35690f64fb554acd3bbd0d9e4f54e8404a99dac0aacc9e41916f20
SHA512

d3354be9347ce446e1a4b108d309429862c48b49f99e2248c29f8224b2c7650cd70167e46560d0b96b1898a60780381f5686e1e28b060be66091a8d7a758eb75

Score

10^/10

remcos agilenet evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

C2

79.134.225.78:2404

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	svchost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Java Update = "\"C:\\Windows\\SysWOW64\\taskmgr\\taskmgr.exe\""	svchost.exe

Executes dropped EXE 2 IoCs

Processes:

svchost.exetaskmgr.exe

pid process

1108 svchost.exe
964 taskmgr.exe
Loads dropped DLL 2 IoCs

Processes:

New_Payment_Advice-04-08-2021.execmd.exe

pid process

108 New_Payment_Advice-04-08-2021.exe
872 cmd.exe

pid	process
1108	svchost.exe
964	taskmgr.exe

pid	process
108	New_Payment_Advice-04-08-2021.exe
872	cmd.exe

Obfuscated with Agile.Net obfuscator 1 IoCs

Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

agilenet

Processes:

resource	yara_rule
behavioral1/memory/108-64-0x00000000007D0000-0x00000000007F1000-memory.dmp	agile_net

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\Java Update = "\"C:\\Windows\\SysWOW64\\taskmgr\\taskmgr.exe\""	svchost.exe

Drops file in System32 directory 3 IoCs

Processes:

svchost.exe

description	ioc	process
File created	C:\Windows\SysWOW64\taskmgr\taskmgr.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\taskmgr\taskmgr.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\taskmgr	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

New_Payment_Advice-04-08-2021.exe

description pid process target process

PID 108 set thread context of 1108 108 New_Payment_Advice-04-08-2021.exe svchost.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

824 reg.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

New_Payment_Advice-04-08-2021.exe

pid process

108 New_Payment_Advice-04-08-2021.exe
108 New_Payment_Advice-04-08-2021.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

New_Payment_Advice-04-08-2021.exe

description pid process

Token: SeDebugPrivilege 108 New_Payment_Advice-04-08-2021.exe

description	pid	process	target process
PID 108 set thread context of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe

pid	process
824	reg.exe

pid	process
108	New_Payment_Advice-04-08-2021.exe
108	New_Payment_Advice-04-08-2021.exe

description	pid	process
Token: SeDebugPrivilege	108	New_Payment_Advice-04-08-2021.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

New_Payment_Advice-04-08-2021.exesvchost.execmd.exeWScript.execmd.exe

description	pid	process	target process
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 108 wrote to memory of 1108	108	New_Payment_Advice-04-08-2021.exe	svchost.exe
PID 1108 wrote to memory of 1008	1108	svchost.exe	cmd.exe
PID 1108 wrote to memory of 1008	1108	svchost.exe	cmd.exe
PID 1108 wrote to memory of 1008	1108	svchost.exe	cmd.exe
PID 1108 wrote to memory of 1008	1108	svchost.exe	cmd.exe
PID 1008 wrote to memory of 824	1008	cmd.exe	reg.exe
PID 1008 wrote to memory of 824	1008	cmd.exe	reg.exe
PID 1008 wrote to memory of 824	1008	cmd.exe	reg.exe
PID 1008 wrote to memory of 824	1008	cmd.exe	reg.exe
PID 1108 wrote to memory of 860	1108	svchost.exe	WScript.exe
PID 1108 wrote to memory of 860	1108	svchost.exe	WScript.exe
PID 1108 wrote to memory of 860	1108	svchost.exe	WScript.exe
PID 1108 wrote to memory of 860	1108	svchost.exe	WScript.exe
PID 860 wrote to memory of 872	860	WScript.exe	cmd.exe
PID 860 wrote to memory of 872	860	WScript.exe	cmd.exe
PID 860 wrote to memory of 872	860	WScript.exe	cmd.exe
PID 860 wrote to memory of 872	860	WScript.exe	cmd.exe
PID 872 wrote to memory of 964	872	cmd.exe	taskmgr.exe
PID 872 wrote to memory of 964	872	cmd.exe	taskmgr.exe
PID 872 wrote to memory of 964	872	cmd.exe	taskmgr.exe
PID 872 wrote to memory of 964	872	cmd.exe	taskmgr.exe

C:\Users\Admin\AppData\Local\Temp\New_Payment_Advice-04-08-2021.exe
"C:\Users\Admin\AppData\Local\Temp\New_Payment_Advice-04-08-2021.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:108

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
2⤵
- Adds policy Run key to start application
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1108

C:\Windows\SysWOW64\cmd.exe
/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
3⤵
- Suspicious use of WriteProcessMemory
PID:1008

C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
4⤵
- Modifies registry key
PID:824

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
3⤵
- Suspicious use of WriteProcessMemory
PID:860

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\taskmgr\taskmgr.exe"
4⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:872

C:\Windows\SysWOW64\taskmgr\taskmgr.exe
C:\Windows\SysWOW64\taskmgr\taskmgr.exe
5⤵
- Executes dropped EXE
PID:964

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Bypass User Account Control

1

T1088

Disabling Security Tools

1

T1089

Modify Registry

4

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
d541f4a8502d1116bea2c70cb7f56705

SHA1
eea882f194859a8fe88485a64a95e9000e799a1d

SHA256
a396bb9df0f318789858a5db9f1fce7d70da880ccdf9f3cc4bef4a826a5a9f83

SHA512
58c57bed7ca8778d9a8834e3546e306200325b11fe4c6864a8bd114a3943113cd5a87f447b88af4ad9d2aaab764a547e57ef14f96bccefd407cbddbd6f87b06b

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe
MD5
54a47f6b5e09a77e61649109c6a08866

SHA1
4af001b3c3816b860660cf2de2c0fd3c1dfb4878

SHA256
121118a0f5e0e8c933efd28c9901e54e42792619a8a3a6d11e1f0025a7324bc2

SHA512
88ee0ef5af1b0b38c19ab4c307636352fc403ea74f3bfb17e246f7fd815ac042183086133cd9fe805bd47e15854776871bb7d384e419862c91503eeb82bfb419

Download Submit
C:\Users\Admin\AppData\Local\Temp\svchost.exe
MD5
54a47f6b5e09a77e61649109c6a08866

SHA1
4af001b3c3816b860660cf2de2c0fd3c1dfb4878

SHA256
121118a0f5e0e8c933efd28c9901e54e42792619a8a3a6d11e1f0025a7324bc2

SHA512
88ee0ef5af1b0b38c19ab4c307636352fc403ea74f3bfb17e246f7fd815ac042183086133cd9fe805bd47e15854776871bb7d384e419862c91503eeb82bfb419

Download Submit
C:\Windows\SysWOW64\taskmgr\taskmgr.exe
MD5
54a47f6b5e09a77e61649109c6a08866

SHA1
4af001b3c3816b860660cf2de2c0fd3c1dfb4878

SHA256
121118a0f5e0e8c933efd28c9901e54e42792619a8a3a6d11e1f0025a7324bc2

SHA512
88ee0ef5af1b0b38c19ab4c307636352fc403ea74f3bfb17e246f7fd815ac042183086133cd9fe805bd47e15854776871bb7d384e419862c91503eeb82bfb419

Download Submit
C:\Windows\SysWOW64\taskmgr\taskmgr.exe
MD5
54a47f6b5e09a77e61649109c6a08866

SHA1
4af001b3c3816b860660cf2de2c0fd3c1dfb4878

SHA256
121118a0f5e0e8c933efd28c9901e54e42792619a8a3a6d11e1f0025a7324bc2

SHA512
88ee0ef5af1b0b38c19ab4c307636352fc403ea74f3bfb17e246f7fd815ac042183086133cd9fe805bd47e15854776871bb7d384e419862c91503eeb82bfb419

Download Submit
\Users\Admin\AppData\Local\Temp\svchost.exe
MD5
54a47f6b5e09a77e61649109c6a08866

SHA1
4af001b3c3816b860660cf2de2c0fd3c1dfb4878

SHA256
121118a0f5e0e8c933efd28c9901e54e42792619a8a3a6d11e1f0025a7324bc2

SHA512
88ee0ef5af1b0b38c19ab4c307636352fc403ea74f3bfb17e246f7fd815ac042183086133cd9fe805bd47e15854776871bb7d384e419862c91503eeb82bfb419

Download Submit
\Windows\SysWOW64\taskmgr\taskmgr.exe
MD5
54a47f6b5e09a77e61649109c6a08866

SHA1
4af001b3c3816b860660cf2de2c0fd3c1dfb4878

SHA256
121118a0f5e0e8c933efd28c9901e54e42792619a8a3a6d11e1f0025a7324bc2

SHA512
88ee0ef5af1b0b38c19ab4c307636352fc403ea74f3bfb17e246f7fd815ac042183086133cd9fe805bd47e15854776871bb7d384e419862c91503eeb82bfb419

Download Submit
memory/108-62-0x0000000002190000-0x0000000002191000-memory.dmp

Filesize
4KB

Download
memory/108-64-0x00000000007D0000-0x00000000007F1000-memory.dmp

Filesize
132KB

Download
memory/108-60-0x00000000003E0000-0x00000000003E1000-memory.dmp

Filesize
4KB

Download
memory/108-65-0x0000000002191000-0x0000000002192000-memory.dmp

Filesize
4KB

Download
memory/108-67-0x0000000000850000-0x0000000000851000-memory.dmp

Filesize
4KB

Download
memory/108-66-0x0000000000800000-0x000000000080B000-memory.dmp

Filesize
44KB

Download
memory/824-75-0x0000000000000000-mapping.dmp

Download
memory/860-76-0x0000000000000000-mapping.dmp

Download
memory/872-80-0x0000000000000000-mapping.dmp

Download
memory/964-83-0x0000000000000000-mapping.dmp

Download
memory/1008-73-0x0000000000000000-mapping.dmp

Download
memory/1108-79-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1108-72-0x0000000076A01000-0x0000000076A03000-memory.dmp

Filesize
8KB

Download
memory/1108-70-0x000000000042EEEF-mapping.dmp

Download
memory/1108-69-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads