remcos | 3a8c27f88bf9c7e9eba822bffde5b96c11bc45fdcf55d6fc5daf9eeab45e3016

General

Target

5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe
Size

593KB
MD5

5b67f0e2488e94ba4107d6a4504e8cb2
SHA1

98c97ea27f366015ecacff18ecbcbb665966dfdd
SHA256

3a8c27f88bf9c7e9eba822bffde5b96c11bc45fdcf55d6fc5daf9eeab45e3016
SHA512

f5f6a740922e06e5725b578a66371d2978d926d58758febcd686e8d52fb1936d6f9f775f03b336a44367e419ec349d9996e430a833fe487b31ca60d01c6fc35d
SSDEEP

6144:uFRBJwLVLYli0ZdbCbN3wirEsKrUimDpxg2ZdeJZk:CRKVLei0PiAEyRKg2ZdeJ

Score

10^/10

remcos discovery rat

Malware Config

Signatures

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2376 set thread context of 2812	2376	installutil.exe	35

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\debug\WIA\JTbJLlcd.exe	installutil.exe
File created	C:\Windows\debug\WIA\JTbJLlcd.exe	installutil.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 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	installutil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	installutil.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2708	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2376	installutil.exe
2376	installutil.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2376	installutil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2812	installutil.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 2376	2448	5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe	30
PID 2448 wrote to memory of 2376	2448	5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe	30
PID 2448 wrote to memory of 2376	2448	5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe	30
PID 2448 wrote to memory of 2376	2448	5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe	30
PID 2448 wrote to memory of 2376	2448	5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe	30
PID 2448 wrote to memory of 2376	2448	5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe	30
PID 2448 wrote to memory of 2376	2448	5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe	30
PID 2376 wrote to memory of 2708	2376	installutil.exe	33
PID 2376 wrote to memory of 2708	2376	installutil.exe	33
PID 2376 wrote to memory of 2708	2376	installutil.exe	33
PID 2376 wrote to memory of 2708	2376	installutil.exe	33
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35
PID 2376 wrote to memory of 2812	2376	installutil.exe	35

C:\Users\Admin\AppData\Local\Temp\5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe" /logtoconsole=false /logfile= /u "C:\Users\Admin\AppData\Local\Temp\5b67f0e2488e94ba4107d6a4504e8cb2_JaffaCakes118.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2376
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JTbJLlcd" /XML "C:\Users\Admin\AppData\Local\Temp\tmp121A.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2708
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

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\tmp121A.tmp

Filesize
1KB

MD5
e9a524333b4aee5d7e3e3325871e0128

SHA1
e98b55b9b34e3e3b7934b84c2788f6e00350a295

SHA256
8e02236aa6443104f7d60f5fa01fd7da0b343c00be38363295ad521810bcc010

SHA512
4b200f33039a4b18bbfc63fef784ed63e1dce398497f2cdedad4820398148d41d00cafc78b0ea84b162159f95ba95dcfb021c8affddfc4a22500ac47f770a624

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

Filesize
79B

MD5
a954d114003e15168db44922f9988fa2

SHA1
0dee4a69a932b770b2c01d67e93e0d456300ac63

SHA256
0648ff168c258141cd4dd0cf0409b140a2243e394bb6b5abfe48bbc9bc5bf46f

SHA512
603807a1a6f9ce53c8b374f93785c4e7bd54ae410ec5e72f2b37c4b1e061032f067d6a8270bab9d32073ee48b0541e4b7a3c0836e216bc87000a612857912d51

Download Submit
memory/2376-9-0x0000000073DD0000-0x00000000744BE000-memory.dmp

Filesize
6.9MB

Download
memory/2376-6-0x0000000073DD0000-0x00000000744BE000-memory.dmp

Filesize
6.9MB

Download
memory/2376-5-0x0000000002130000-0x00000000021CA000-memory.dmp

Filesize
616KB

Download
memory/2376-4-0x0000000000200000-0x000000000020C000-memory.dmp

Filesize
48KB

Download
memory/2376-7-0x0000000073DD0000-0x00000000744BE000-memory.dmp

Filesize
6.9MB

Download
memory/2376-8-0x0000000000210000-0x000000000023E000-memory.dmp

Filesize
184KB

Download
memory/2376-37-0x0000000073DD0000-0x00000000744BE000-memory.dmp

Filesize
6.9MB

Download
memory/2448-3-0x0000000073DD0000-0x00000000744BE000-memory.dmp

Filesize
6.9MB

Download
memory/2448-2-0x0000000073DD0000-0x00000000744BE000-memory.dmp

Filesize
6.9MB

Download
memory/2448-1-0x0000000000D90000-0x0000000000E2A000-memory.dmp

Filesize
616KB

Download
memory/2448-0-0x0000000073DDE000-0x0000000073DDF000-memory.dmp

Filesize
4KB

Download
memory/2812-19-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-23-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-21-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-33-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-29-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2812-15-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-25-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-38-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-39-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-42-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download
memory/2812-17-0x0000000000090000-0x00000000000B0000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads