modiloader | 67f61357cf2d027bb18929c72aae2e8427ed0ddb7c16e4265855b8d827d95518

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
03/04/2024, 15:57

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General

Target
PROFORMA INVOICE.exe
Size 1.6MB
Sample240403-tdxpjafc8s
SHA256 67f61357cf2d027bb18929c72aae2e8427ed0ddb7c16e4265855b8d827d95518
MD5 488f8d9de535475e4a901c033199ea0c
SHA1 3bda45e062fdc55823d9ceb71d0575df1e6ffd9e
SHA512 58c0bb1af9b495f4c20a518d158f35a96d3f51dbb026b7fc40572a212dd7f05221f11efa995ef10199d32f970a308ea25407b77d307eeed06bd91b897ddbc4a4
SSDEEP 49152:ay6imwGhfj4GBT2z95Zw/L+gwnzBnwyuPTh:azimw4f8iSuD+g
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

modiloader remcos remotehost persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

127.0.0.1:47212
officerem.duckdns.org:47212

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-I8N3XG
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

ModiLoader Second Stage 1 IoCs

resource	yara_rule
behavioral2/memory/1396-2-0x0000000002950000-0x0000000003950000-memory.dmp	modiloader_stage2

Executes dropped EXE 1 IoCs

pid	Process
5108	7439909.exe

Loads dropped DLL 1 IoCs

pid	Process
5108	7439909.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Uajcyryw = "C:\\Users\\Public\\Uajcyryw.url"	PROFORMA INVOICE.exe

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	24	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1236	powershell.exe
1236	powershell.exe
1236	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1236	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1396	PROFORMA INVOICE.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1396 wrote to memory of 452	1396	PROFORMA INVOICE.exe	101
PID 1396 wrote to memory of 452	1396	PROFORMA INVOICE.exe	101
PID 1396 wrote to memory of 452	1396	PROFORMA INVOICE.exe	101
PID 1396 wrote to memory of 5104	1396	PROFORMA INVOICE.exe	102
PID 1396 wrote to memory of 5104	1396	PROFORMA INVOICE.exe	102
PID 1396 wrote to memory of 5104	1396	PROFORMA INVOICE.exe	102
PID 1396 wrote to memory of 1432	1396	PROFORMA INVOICE.exe	107
PID 1396 wrote to memory of 1432	1396	PROFORMA INVOICE.exe	107
PID 1396 wrote to memory of 1432	1396	PROFORMA INVOICE.exe	107
PID 1432 wrote to memory of 5108	1432	cmd.exe	109
PID 1432 wrote to memory of 5108	1432	cmd.exe	109
PID 5108 wrote to memory of 4112	5108	7439909.exe	110
PID 5108 wrote to memory of 4112	5108	7439909.exe	110
PID 4112 wrote to memory of 3344	4112	cmd.exe	112
PID 4112 wrote to memory of 3344	4112	cmd.exe	112
PID 3344 wrote to memory of 1236	3344	cmd.exe	114
PID 3344 wrote to memory of 1236	3344	cmd.exe	114
PID 1396 wrote to memory of 4748	1396	PROFORMA INVOICE.exe	115
PID 1396 wrote to memory of 4748	1396	PROFORMA INVOICE.exe	115
PID 1396 wrote to memory of 4748	1396	PROFORMA INVOICE.exe	115

C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.exe
"C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1396
- C:\Windows\SysWOW64\cmd.exe
  cmd /c mkdir "\\?\C:\Windows "
  2⤵
  PID:452
- C:\Windows\SysWOW64\cmd.exe
  cmd /c mkdir "\\?\C:\Windows \System32"
  2⤵
  PID:5104
- C:\Windows\SysWOW64\cmd.exe
  cmd /c "C:\Windows \System32\7439909.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1432
- - C:\Windows \System32\7439909.exe
    "C:\Windows \System32\7439909.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:5108
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4112
    - - C:\Windows\system32\cmd.exe
        
        cmd /c powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:3344
      - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1236
- C:\Windows\SysWOW64\extrac32.exe
  C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\PROFORMA INVOICE.exe C:\\Users\\Public\\Libraries\\Uajcyryw.PIF
  2⤵
  PID:4748

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=1712 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:4256

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

logs.dat

Path C:\ProgramData\remcos\logs.dat
Size 144B
SHA256 409f7b70c7bbfbcc875c5f71b3ade9bdfcebd41f989128fd0ab3c922ba09037e
MD5 af3b43bde147aa4a614974b1803084bb
SHA1 09c240f906a96d4fa6bbcaa78d40e529e430828c
SHA512 b11fd072b05ff55ca1cf5e0b7435b03b250cee3858857569dfa801200e17618f9c4522cce439e8d78d5703c7e678b8886c32c4063ac0d4ed253df8a3ad49cc12
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_bfbota4e.vyk.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bfbota4e.vyk.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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7439909.exe

Path C:\Windows \System32\7439909.exe
Size 128KB
SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
MD5 231ce1e1d7d98b44371ffff407d68b59
SHA1 25510d0f6353dbf0c9f72fc880de7585e34b28ff
SHA512 520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612
SSDEEP 3072:zar2xXibKcf5K67+k02XbFbosspwUUgcR:Nibl7+k02XZb9UA
MD5 SHA1 SHA512 SSDEEP

Submit Download

netutils.dll

Path C:\Windows \System32\netutils.dll
Size 112KB
SHA256 50573c81e5773c13a5411e8446d7fb17956865675782239818f7affd40a2fecb
MD5 8541304aadba4ae8620bb2699f6e0437
SHA1 e0b28a6ecd32d3789433217364c1006de9892df8
SHA512 c18b1233c138229705242e1cdc00970e45e414d8da9c643b1196ec9de261ae18076e22bed6fcc48c07d1f0e851469db9147f083f3c3c76a26b75994419392455
SSDEEP 1536:yrWKID3z1yOjXtZqmsGyhvI5jduvd9a8yCl7MbiRVRpz5u:yrWt/LZq3hvUuvd9a8BRpz5u
MD5 SHA1 SHA512 SSDEEP

Submit Download

KDECO.bat

Path C:\windows \system32\KDECO.bat
Size 11KB
SHA256 a3a80983cb33159f0455fa0135789402558baa1460db94d0071318512b8cb5f9
MD5 c545650595b479c81ad6b9d8882aae39
SHA1 7a98aa2e6eee23b3c1bba876955d525bc618b3f0
SHA512 85ac596a7da9072a28c4178e4fdedc98f1b49c8e3fe5612cfe464833297b13f65d2dc59b52d7fc9970cff8f98d954111229aec0ed9dded454e03b0cf4ebb6ff3
SSDEEP 192:UPNoaJSjPMK2jxkXDmZevmhmpd/mGq5LnRWF7NpL29QeQoGAhLNTbz4UgHCHDQSq:KNjsjUKwxCiZevmgpd/jcnRu7imoG8Le
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1236-28-0x00007FFE92DE0000-0x00007FFE938A1000-memory.dmp

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memory/1236-33-0x00007FFE92DE0000-0x00007FFE938A1000-memory.dmp

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memory/1236-30-0x0000021876060000-0x0000021876070000-memory.dmp

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memory/1236-29-0x0000021876060000-0x0000021876070000-memory.dmp

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memory/1236-18-0x0000021876920000-0x0000021876942000-memory.dmp

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memory/1396-39-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-45-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-4-0x0000000000400000-0x00000000005AF000-memory.dmp

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memory/1396-2-0x0000000002950000-0x0000000003950000-memory.dmp

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memory/1396-36-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-38-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-0-0x0000000000870000-0x0000000000871000-memory.dmp

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memory/1396-40-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-41-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-42-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-44-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-86-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-48-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-51-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-52-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-1-0x0000000002950000-0x0000000003950000-memory.dmp

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memory/1396-63-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-64-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-73-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-74-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/1396-85-0x00000000153D0000-0x00000000163D0000-memory.dmp

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memory/5108-15-0x00000000613C0000-0x00000000613E3000-memory.dmp

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