remcos | eaad66e48e3e3bf7c291baf791b910c7aab878b006cf37f653b152ec3118c0de

General

Target

c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe
Size

588KB
MD5

c928a854cfbfdedf03340fa5bc09b29e
SHA1

b94f4521bd81481c7973c38c43f743d88b05d22d
SHA256

eaad66e48e3e3bf7c291baf791b910c7aab878b006cf37f653b152ec3118c0de
SHA512

3f31bd871c4fa8dfa06e4940d4ba7519289ed894c48ae8cf242ab01c72026d0fa7b4c314dd3281dfdc8a6847c94bd3ae36b8ce3a0132efc1f52ca2866a556f82
SSDEEP

6144:rOeTjZiol0YwthHibT3dVgCiR13/HlH+M7UgEtf0/BqpGgC:rOeXZDe7E3dVgCGZ9+M7UgEV0/BqcgC

Score

10^/10

remcos discovery persistence rat

Malware Config

Signatures

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
4916	Remc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\""	c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\""	Remc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4916 set thread context of 3496	4916	Remc.exe	98

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 4 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	c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Remc.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000_Classes\Local Settings	c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4800	c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe
4916	Remc.exe
4916	Remc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4800 wrote to memory of 4168	4800	c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe	94
PID 4800 wrote to memory of 4168	4800	c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe	94
PID 4800 wrote to memory of 4168	4800	c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe	94
PID 4168 wrote to memory of 1748	4168	WScript.exe	95
PID 4168 wrote to memory of 1748	4168	WScript.exe	95
PID 4168 wrote to memory of 1748	4168	WScript.exe	95
PID 1748 wrote to memory of 4916	1748	cmd.exe	97
PID 1748 wrote to memory of 4916	1748	cmd.exe	97
PID 1748 wrote to memory of 4916	1748	cmd.exe	97
PID 4916 wrote to memory of 3496	4916	Remc.exe	98
PID 4916 wrote to memory of 3496	4916	Remc.exe	98
PID 4916 wrote to memory of 3496	4916	Remc.exe	98
PID 4916 wrote to memory of 3496	4916	Remc.exe	98
PID 4916 wrote to memory of 3496	4916	Remc.exe	98
PID 4916 wrote to memory of 3496	4916	Remc.exe	98
PID 4916 wrote to memory of 3496	4916	Remc.exe	98
PID 4916 wrote to memory of 3496	4916	Remc.exe	98
PID 4916 wrote to memory of 3496	4916	Remc.exe	98
PID 4916 wrote to memory of 3496	4916	Remc.exe	98

C:\Users\Admin\AppData\Local\Temp\c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c928a854cfbfdedf03340fa5bc09b29e_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4800
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4168
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remc\Remc.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1748
  - - C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
      C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4916
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        5⤵
        
        PID:3496

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

Query Registry

1

T1012

System Information Discovery

2

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\install.vbs

Filesize
410B

MD5
837b54af2c8d285fb69d719cc9061206

SHA1
b31b75216a46b744eb0d89dd9885431a8ecde820

SHA256
353bf067c7071e2b6904205a0f6755433a8711a4b2a9b48ac32ff538463f0e46

SHA512
6cc4e846538cf16de26004343a157a565fe9730ad5c253e3fb6c64098405849e732bd2216fbdecd52cc3cbcb84e24e4dca23b5fd4f68bcdc0e73d485479e2311

Download Submit
C:\Users\Admin\AppData\Roaming\Remc\Remc.exe

Filesize
588KB

MD5
c928a854cfbfdedf03340fa5bc09b29e

SHA1
b94f4521bd81481c7973c38c43f743d88b05d22d

SHA256
eaad66e48e3e3bf7c291baf791b910c7aab878b006cf37f653b152ec3118c0de

SHA512
3f31bd871c4fa8dfa06e4940d4ba7519289ed894c48ae8cf242ab01c72026d0fa7b4c314dd3281dfdc8a6847c94bd3ae36b8ce3a0132efc1f52ca2866a556f82

Download Submit
C:\Users\Admin\AppData\Roaming\Remc\logs.dat

Filesize
79B

MD5
0b1bf5f6d858ec7dcda5adceecb6d2c4

SHA1
c6e205e6358144154c398b7a8ddb104528179894

SHA256
bb1f8766e63bbfb2e38825f9bf372bbbfa1bfce042d2acb202b962b5450a232e

SHA512
9ca5049c92eca411242e7c41f097242b0e95d86c37948e5782fe62654783a79580c1f8bac8037de368a60043586bb4d727cba835f60616e58e0017df33d6c7cc

Download Submit
memory/3496-25-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4800-2-0x0000000077581000-0x00000000776A1000-memory.dmp

Filesize
1.1MB

Download
memory/4800-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4800-7-0x0000000000400000-0x0000000000495000-memory.dmp

Filesize
596KB

Download
memory/4800-14-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4800-13-0x0000000077581000-0x00000000776A1000-memory.dmp

Filesize
1.1MB

Download
memory/4916-20-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4916-23-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads