remcos | 1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52

General

Target

1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe
Size

1.0MB
MD5

154ee474a1605a4a471cf44de4c73710
SHA1

33f7e705925c1af1a6ca6c81da5be0d74175ed06
SHA256

1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52
SHA512

4babff273de2527724defd713d8d322f40717fe55ad5ded33f8997d6cd9cdfa797230a68928e7dde8eea6c60a19761fb510025649185584363da5fdfe43fa5d7
SSDEEP

24576:fG6Wnz1p0C9+xk/rsvMXIojT5Ubcq7xLUsZdKaL7IEGJRTCg071Kp:u9oCEx8r6MXb5UhxHZdt7cHTDwKp

Score

10^/10

remcos discovery persistence rat upx

Malware Config

Signatures

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

Blocklisted process makes network request 5 IoCs

flow	pid	Process
35	4396	powershell.exe
37	4396	powershell.exe
39	4396	powershell.exe
43	4396	powershell.exe
46	4396	powershell.exe

Loads dropped DLL 1 IoCs

pid	Process
4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Chenopodium = "C:\\Users\\Admin\\AppData\\Roaming\\Restandardisation\\Moonlet.exe"	powershell.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4396	powershell.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe
4396	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4888 set thread context of 4396	4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe	95

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4396-27-0x0000000000400000-0x00000000005E4000-memory.dmp	upx
behavioral2/memory/4396-36-0x0000000000400000-0x00000000005E4000-memory.dmp	upx
behavioral2/memory/4396-35-0x0000000000400000-0x00000000005E4000-memory.dmp	upx
behavioral2/memory/4396-34-0x0000000000400000-0x00000000005E4000-memory.dmp	upx
behavioral2/memory/4396-45-0x0000000000400000-0x00000000005E4000-memory.dmp	upx
behavioral2/memory/4396-46-0x0000000000400000-0x00000000005E4000-memory.dmp	upx

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ekskommunicere\Rachmaninoff.sto	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe
4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4396	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4888 wrote to memory of 4300	4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe	94
PID 4888 wrote to memory of 4300	4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe	94
PID 4888 wrote to memory of 4300	4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe	94
PID 4888 wrote to memory of 4396	4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe	95
PID 4888 wrote to memory of 4396	4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe	95
PID 4888 wrote to memory of 4396	4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe	95
PID 4888 wrote to memory of 4396	4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe	95
PID 4888 wrote to memory of 4396	4888	1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe	95

C:\Users\Admin\AppData\Local\Temp\1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe
"C:\Users\Admin\AppData\Local\Temp\1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4888
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Users\Admin\AppData\Local\Temp\1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe"
  2⤵
  PID:4300
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Users\Admin\AppData\Local\Temp\1f7ca25d94289d08e87326015bdbefdeb300ea26fa77561f6713ed3e3be5bf52N.exe"
  2⤵
  - Blocklisted process makes network request
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4396

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nstB660.tmp\System.dll

Filesize
12KB

MD5
192639861e3dc2dc5c08bb8f8c7260d5

SHA1
58d30e460609e22fa0098bc27d928b689ef9af78

SHA256
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6

SHA512
6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

Download Submit
memory/4396-37-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-48-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-36-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-47-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-15-0x0000000077288000-0x0000000077289000-memory.dmp

Filesize
4KB

Download
memory/4396-16-0x0000000077201000-0x0000000077321000-memory.dmp

Filesize
1.1MB

Download
memory/4396-27-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-30-0x0000000077201000-0x0000000077321000-memory.dmp

Filesize
1.1MB

Download
memory/4396-31-0x0000000000482000-0x0000000000483000-memory.dmp

Filesize
4KB

Download
memory/4396-35-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-46-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-45-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-32-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-34-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-33-0x0000000077201000-0x0000000077321000-memory.dmp

Filesize
1.1MB

Download
memory/4396-38-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-40-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-39-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4396-41-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/4888-12-0x0000000077201000-0x0000000077321000-memory.dmp

Filesize
1.1MB

Download
memory/4888-13-0x0000000074065000-0x0000000074066000-memory.dmp

Filesize
4KB

Download
memory/4888-14-0x0000000074060000-0x0000000074067000-memory.dmp

Filesize
28KB

Download
memory/4888-11-0x0000000077201000-0x0000000077321000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads