remcos | f3b1d24ae8b5e245c9806b0c67ff1f7f93f5b86d639f5914a4a2b8dce22484e6

Analysis

max time kernel
155s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2024, 19:10

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General

Target

List of suspected clients/ptSrv.exe
Size

202KB
MD5

64179e64675e822559cac6652298bdfc
SHA1

cceed3b2441146762512918af7bf7f89fb055583
SHA256

c26db97858c427d92e393396f7cb7f9e7ed8f9ce616adcc123d0ec6b055b99c9
SHA512

ef740b35ea5190f8ee47776af1f15ebdd54d39c84da5665e64f67ae6dd0f4b181e955e9a35319a5d0bd764972562e8f2bc44dbdf83c3bedf05674eae902e7280
SSDEEP

3072:EMtKztOp6KfOQqoY3ltdNjlcwsSdplkrxf+Uyecgw:ELKfOQLY3l9jlcwnlUf+z7gw

Score

10^/10

remcos remotehost rat

Malware Config

Extracted

Family

remcos

Version

4.9.2 Light

Botnet

RemoteHost

66.154.102.133:2404

Attributes

audio_folder
MicRecords
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
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-W6WVSY
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

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 968 set thread context of 3672	968	ptSrv.exe	102

Executes dropped EXE 1 IoCs

pid	Process
968	ptSrv.exe

Loads dropped DLL 3 IoCs

pid	Process
968	ptSrv.exe
968	ptSrv.exe
968	ptSrv.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3220	ptSrv.exe
968	ptSrv.exe
968	ptSrv.exe
968	ptSrv.exe
3672	cmd.exe
3672	cmd.exe
3672	cmd.exe
3672	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
968	ptSrv.exe
3672	cmd.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3220 wrote to memory of 968	3220	ptSrv.exe	100
PID 3220 wrote to memory of 968	3220	ptSrv.exe	100
PID 3220 wrote to memory of 968	3220	ptSrv.exe	100
PID 968 wrote to memory of 3672	968	ptSrv.exe	102
PID 968 wrote to memory of 3672	968	ptSrv.exe	102
PID 968 wrote to memory of 3672	968	ptSrv.exe	102
PID 968 wrote to memory of 3672	968	ptSrv.exe	102
PID 3672 wrote to memory of 540	3672	cmd.exe	115
PID 3672 wrote to memory of 540	3672	cmd.exe	115
PID 3672 wrote to memory of 540	3672	cmd.exe	115
PID 3672 wrote to memory of 540	3672	cmd.exe	115
PID 3672 wrote to memory of 540	3672	cmd.exe	115

C:\Users\Admin\AppData\Local\Temp\List of suspected clients\ptSrv.exe
"C:\Users\Admin\AppData\Local\Temp\List of suspected clients\ptSrv.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3220
- C:\Users\Admin\AppData\Roaming\EXN_notepad_v3\ptSrv.exe
  "C:\Users\Admin\AppData\Roaming\EXN_notepad_v3\ptSrv.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:968
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\SysWOW64\cmd.exe
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:3672
  - - C:\Windows\SysWOW64\explorer.exe
      C:\Windows\SysWOW64\explorer.exe
      4⤵
      PID:540

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4144 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:5036

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\3a368266

Filesize
1.1MB

MD5
1fd0fe39957d50570e04b97a296e170e

SHA1
c05b0f695c1587b402fca10affc10c7a2da70068

SHA256
037d4fddc7e1fa4a878b1a138e5add1d86c26c1a7c9172567f4515ef9cc1a05c

SHA512
6e32246e8fc19595a8e54775d1a0595245809727460e20e72c8d346e8c7f4a89ea37ba1a759e72fa2d14b07e696d19896f93494ab317f4131f8535c212c10a2d

Download Submit
C:\Users\Admin\AppData\Roaming\EXN_notepad_v3\MSVCP140.dll

Filesize
427KB

MD5
71a0aa2d05e9174cefd568347bd9c70f

SHA1
cb9247a0fa59e47f72df7d1752424b33a903bbb2

SHA256
fdb3d86c512adff90967cb860d02a4682850ab96727f0376e4d4836504c50e47

SHA512
6e65520528facaa4058720eb16d6bfdcc7bb36923b7e8e6551f3526709f0fabafab123999e618438e6abe7efed4a1332547cfc988f2b24b0e3d91198b95a911a

Download Submit
C:\Users\Admin\AppData\Roaming\EXN_notepad_v3\VCRUNTIME140.dll

Filesize
81KB

MD5
16b26bc43943531d7d7e379632ed4e63

SHA1
565287de39649e59e653a3612478c2186096d70a

SHA256
346f72c9a7584c2ab6ce65cd38a616c77ebddc0bbab2274c4e89dd5e62237517

SHA512
b5b7b4b8c5ab4276a34956e43f586272b1803ec3609253fee1bcc0a549aed7ba11d47404b023f7b67af701726bab95cca55738e7bd5bca272eca5ac71bb418cc

Download Submit
C:\Users\Admin\AppData\Roaming\EXN_notepad_v3\assignat.avi

Filesize
41KB

MD5
cd162f403f22216679f486ffa15fa534

SHA1
dfdb1dd7b3f7391f72d8dc9d2685d0d4bb50f0a9

SHA256
9f0134e6a033cfaefde9819834ee65c36c3807f64f205ce16779c724317efaf2

SHA512
b821b0cd92bbfe22c0dc75b531f410a433c2311cd73708d9da4eb63e074a5c130f8974f201eb66f55e1bf139c5714ed75b0494d082ef97eaa6abe1b523e85b4e

Download Submit
C:\Users\Admin\AppData\Roaming\EXN_notepad_v3\ptSrv.exe

Filesize
202KB

MD5
64179e64675e822559cac6652298bdfc

SHA1
cceed3b2441146762512918af7bf7f89fb055583

SHA256
c26db97858c427d92e393396f7cb7f9e7ed8f9ce616adcc123d0ec6b055b99c9

SHA512
ef740b35ea5190f8ee47776af1f15ebdd54d39c84da5665e64f67ae6dd0f4b181e955e9a35319a5d0bd764972562e8f2bc44dbdf83c3bedf05674eae902e7280

Download Submit
C:\Users\Admin\AppData\Roaming\EXN_notepad_v3\ruffian.dbf

Filesize
875KB

MD5
a12fc5b2c56174be480fc3c720c7fcdd

SHA1
48cc8b9a3cd29bcc57a244dee5300d02e2487cf0

SHA256
c239a8ce1d3f98f86a2b8446a32dd4c433b047c339fb5a774b9723426f97f7b2

SHA512
8abfcca938a2a949c65a0e7b9ab5354bffd119f06b44c4a32a3c5259ecabdff06d80f70257d800394d506434ca9f4a147355746f45acf9b0ab854deb383379f1

Download Submit
C:\Users\Admin\AppData\Roaming\EXN_notepad_v3\wbxtrace.dll

Filesize
103KB

MD5
530af153319a8254261d2de81b40cfe7

SHA1
63c7fb08e4dfe1e1cbd40a0fb333472822daa60a

SHA256
098e8c03cfb1bc11bd7176326a36d07d1dc282f5acd78a272289afd16b7506b3

SHA512
6a5998ffa86813d2825811ae9ebe2b5f43b26d02aae73395d720c83f89820af2006a93737356b138a5d736f2364a60abed5195692d58bf1866727727ab654805

Download Submit
memory/540-40-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/540-42-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/540-46-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/540-45-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/540-44-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/540-43-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/540-41-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/540-39-0x0000000000BF0000-0x0000000001023000-memory.dmp

Filesize
4.2MB

Download
memory/540-36-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/540-35-0x00007FFC0E590000-0x00007FFC0E785000-memory.dmp

Filesize
2.0MB

Download
memory/968-21-0x0000000074A00000-0x0000000074B7B000-memory.dmp

Filesize
1.5MB

Download
memory/968-24-0x0000000074A00000-0x0000000074B7B000-memory.dmp

Filesize
1.5MB

Download
memory/968-23-0x0000000074A00000-0x0000000074B7B000-memory.dmp

Filesize
1.5MB

Download
memory/968-22-0x00007FFC0E590000-0x00007FFC0E785000-memory.dmp

Filesize
2.0MB

Download
memory/3220-0-0x0000000074A30000-0x0000000074BAB000-memory.dmp

Filesize
1.5MB

Download
memory/3220-1-0x00007FFC0E590000-0x00007FFC0E785000-memory.dmp

Filesize
2.0MB

Download
memory/3672-34-0x0000000074A00000-0x0000000074B7B000-memory.dmp

Filesize
1.5MB

Download
memory/3672-32-0x0000000074A00000-0x0000000074B7B000-memory.dmp

Filesize
1.5MB

Download
memory/3672-31-0x0000000074A00000-0x0000000074B7B000-memory.dmp

Filesize
1.5MB

Download
memory/3672-28-0x00007FFC0E590000-0x00007FFC0E785000-memory.dmp

Filesize
2.0MB

Download
memory/3672-26-0x0000000074A00000-0x0000000074B7B000-memory.dmp

Filesize
1.5MB

Download