remcos | ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71

Analysis

max time kernel
149s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30/09/2024, 19:19

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General

Target

ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71.exe
Size

1.4MB
MD5

9c1f32395776c5598e1b6ea9d971ddf2
SHA1

c2609853716705901b3ee63e87a67c519c7f1d13
SHA256

ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71
SHA512

394d7faf19eab2904b96c3547cd091e05ae493930a6135fd66569f6023866b3d76f17e65f9cbe720044d127b626710c788344c8176e2d4d817ef3563b156e528
SSDEEP

24576:y6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6ES:1Y9UORVOM1jJHzaiape0hsABFRJch6Lm

Score

10^/10

remcos graced discovery rat rezer0 upx

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

GRACED

thankyoulord.ddns.net:5050

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-0S5XD9
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

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

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral1/memory/2752-9-0x0000000000AB0000-0x0000000000ADC000-memory.dmp	rezer0

Executes dropped EXE 1 IoCs

pid	Process
2752	test.exe

Loads dropped DLL 1 IoCs

pid	Process
1140	cmd.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2752 set thread context of 2908	2752	test.exe	37

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1672-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral1/memory/1672-10-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral1/memory/1672-34-0x0000000000400000-0x00000000006F1000-memory.dmp	upx

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 5 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	test.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
2928	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2752	test.exe
2752	test.exe
2752	test.exe
2752	test.exe
2752	test.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2752	test.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1140	1672	ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71.exe	31
PID 1672 wrote to memory of 1140	1672	ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71.exe	31
PID 1672 wrote to memory of 1140	1672	ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71.exe	31
PID 1672 wrote to memory of 1140	1672	ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71.exe	31
PID 1140 wrote to memory of 2752	1140	cmd.exe	32
PID 1140 wrote to memory of 2752	1140	cmd.exe	32
PID 1140 wrote to memory of 2752	1140	cmd.exe	32
PID 1140 wrote to memory of 2752	1140	cmd.exe	32
PID 2752 wrote to memory of 2928	2752	test.exe	33
PID 2752 wrote to memory of 2928	2752	test.exe	33
PID 2752 wrote to memory of 2928	2752	test.exe	33
PID 2752 wrote to memory of 2928	2752	test.exe	33
PID 2752 wrote to memory of 2184	2752	test.exe	35
PID 2752 wrote to memory of 2184	2752	test.exe	35
PID 2752 wrote to memory of 2184	2752	test.exe	35
PID 2752 wrote to memory of 2184	2752	test.exe	35
PID 2752 wrote to memory of 2772	2752	test.exe	36
PID 2752 wrote to memory of 2772	2752	test.exe	36
PID 2752 wrote to memory of 2772	2752	test.exe	36
PID 2752 wrote to memory of 2772	2752	test.exe	36
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37
PID 2752 wrote to memory of 2908	2752	test.exe	37

C:\Users\Admin\AppData\Local\Temp\ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71.exe
"C:\Users\Admin\AppData\Local\Temp\ec189bab39fc97ddc3282ccca5e6d4bc623b0bc82d263efb95445676d67d9b71.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c test.exe
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1140
- - C:\Users\Admin\AppData\Local\Temp\test.exe
    test.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2752
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA860.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2928
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "{path}"
      4⤵
      PID:2184
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "{path}"
      4⤵
      PID:2772
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "{path}"
      4⤵
      System Location Discovery: System Language Discovery
      PID:2908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\test.exe

Filesize
330KB

MD5
261aa73f93c90dcec0c36a51cb9b5dee

SHA1
b0c41e06cd2ded81706820423db40bf8fea2c957

SHA256
ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54

SHA512
7b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA860.tmp

Filesize
1KB

MD5
754e84c303d70e490ef2cae95c1e8cb8

SHA1
d062d13397d5e5a6df9ef3b98a2e2fb33d50e108

SHA256
8ab3a3f6e6fcdd64f9164907d6c0ce407c0ccca1d767f64bfc65fc0351ab7658

SHA512
3338c38d6afd84b540bfbd9ac179f0ab0835f735b9a7f3a24f6ffa4f71f4f48222a5e667f8d2451276d26eee7c3923f4c633e6497e1de06e41abc723c3252946

Download Submit
memory/1672-10-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1672-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1672-34-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/2752-9-0x0000000000AB0000-0x0000000000ADC000-memory.dmp

Filesize
176KB

Download
memory/2752-31-0x00000000744B0000-0x0000000074B9E000-memory.dmp

Filesize
6.9MB

Download
memory/2752-8-0x00000000744B0000-0x0000000074B9E000-memory.dmp

Filesize
6.9MB

Download
memory/2752-11-0x00000000744BE000-0x00000000744BF000-memory.dmp

Filesize
4KB

Download
memory/2752-13-0x00000000744B0000-0x0000000074B9E000-memory.dmp

Filesize
6.9MB

Download
memory/2752-7-0x0000000000390000-0x0000000000398000-memory.dmp

Filesize
32KB

Download
memory/2752-6-0x0000000000CF0000-0x0000000000D48000-memory.dmp

Filesize
352KB

Download
memory/2752-5-0x00000000744BE000-0x00000000744BF000-memory.dmp

Filesize
4KB

Download
memory/2908-25-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-37-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-32-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-27-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2908-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-24-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-21-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-19-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-35-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-36-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-33-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-38-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-40-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-42-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-44-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-46-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-48-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-50-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-52-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-54-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-56-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-58-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2908-60-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download