modiloader | 4a2c6fb7bb7678610a7d39de3497f9db1476dc5a7d8d1b29fd9f0e881816c366

Analysis

max time kernel
134s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03/04/2024, 11:17

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General

Target
PROFORMA INVOICE.exe
Size 1.6MB
Sample240403-ndsspach88
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
behavioral1/memory/1284-2-0x0000000002CD0000-0x0000000003CD0000-memory.dmp	modiloader_stage2

Executes dropped EXE 2 IoCs

pid	Process
3040	4930906.exe
1544	4930906.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-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\Uajcyryw = "C:\\Users\\Public\\Uajcyryw.url"	PROFORMA INVOICE.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	4	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1284	PROFORMA INVOICE.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1284 wrote to memory of 2560	1284	PROFORMA INVOICE.exe	28
PID 1284 wrote to memory of 2560	1284	PROFORMA INVOICE.exe	28
PID 1284 wrote to memory of 2560	1284	PROFORMA INVOICE.exe	28
PID 1284 wrote to memory of 2560	1284	PROFORMA INVOICE.exe	28
PID 1284 wrote to memory of 2596	1284	PROFORMA INVOICE.exe	29
PID 1284 wrote to memory of 2596	1284	PROFORMA INVOICE.exe	29
PID 1284 wrote to memory of 2596	1284	PROFORMA INVOICE.exe	29
PID 1284 wrote to memory of 2596	1284	PROFORMA INVOICE.exe	29
PID 1284 wrote to memory of 2844	1284	PROFORMA INVOICE.exe	32
PID 1284 wrote to memory of 2844	1284	PROFORMA INVOICE.exe	32
PID 1284 wrote to memory of 2844	1284	PROFORMA INVOICE.exe	32
PID 1284 wrote to memory of 2844	1284	PROFORMA INVOICE.exe	32
PID 1284 wrote to memory of 904	1284	PROFORMA INVOICE.exe	36
PID 1284 wrote to memory of 904	1284	PROFORMA INVOICE.exe	36
PID 1284 wrote to memory of 904	1284	PROFORMA INVOICE.exe	36
PID 1284 wrote to memory of 904	1284	PROFORMA INVOICE.exe	36

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:1284
- C:\Windows\SysWOW64\cmd.exe
  cmd /c mkdir "\\?\C:\Windows "
  2⤵
  PID:2560
- C:\Windows\SysWOW64\cmd.exe
  cmd /c mkdir "\\?\C:\Windows \System32"
  2⤵
  PID:2596
- C:\Windows\SysWOW64\cmd.exe
  cmd /c "C:\Windows \System32\4930906.exe"
  2⤵
  PID:2844
- - C:\Windows \System32\4930906.exe
    "C:\Windows \System32\4930906.exe"
    3⤵
    - Executes dropped EXE
    PID:3040
- - C:\Windows \System32\4930906.exe
    "C:\Windows \System32\4930906.exe"
    3⤵
    - Executes dropped EXE
    PID:1544
- 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:904

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

logs.dat

Path C:\ProgramData\remcos\logs.dat
Size 144B
SHA256 571d46819600df5105d1d83515ddbc657070a24642f223689f32a5836009cfc2
MD5 7e980fc1c9818f9bf58077d154ddd777
SHA1 69b5a2c255eb62fa0caf77547ba1b8e333b8465d
SHA512 fe1cb29ab1772065e2149ec8324b7127bbb49adb1959d55924cce37ed09c43c42a5e6b54b3e36dbd3a3ec25d5ec3bd79b43fa9d2cbdb98f659fa202a01e7a7fe
MD5 SHA1 SHA512

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94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Size 68KB
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
SSDEEP 1536:iMveRG6BWC7T2g1wGUa5QUoaIB9ttiFJG+AOQOXl0Usvwr:feRG6BX6gUaHo9tkBHiUewr
MD5 SHA1 SHA512 SSDEEP

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TarB320.tmp

Path C:\Users\Admin\AppData\Local\Temp\TarB320.tmp
Size 177KB
SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
MD5 435a9ac180383f9fa094131b173a2f7b
SHA1 76944ea657a9db94f9a4bef38f88c46ed4166983
SHA512 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a
SSDEEP 1536:fAo/J+lCUsTRvsqgCyqWlUDNWdm1wpSru2A0XwjY/z02DTr3rmt6mJ:f/J+qTR0XCy/dmASru2Aijbdq
MD5 SHA1 SHA512 SSDEEP

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4930906.exe

Path C:\Windows \System32\4930906.exe
Size 128KB
SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
MD5 231ce1e1d7d98b44371ffff407d68b59
SHA1 25510d0f6353dbf0c9f72fc880de7585e34b28ff
SHA512 520887b01bda96b7c4f91b9330a5c03a12f7c7f266d4359432e7bacc76b0eef377c05a4361f8fa80ad0b94b5865699d747a5d94a2d3dcdb85dabf5887bb6c612
SSDEEP 3072:zar2xXibKcf5K67+k02XbFbosspwUUgcR:Nibl7+k02XZb9UA
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1284-88-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-82-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-2-0x0000000002CD0000-0x0000000003CD0000-memory.dmp

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memory/1284-0-0x00000000001B0000-0x00000000001B1000-memory.dmp

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memory/1284-129-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-80-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-87-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-83-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-84-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-86-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-4-0x00000000001B0000-0x00000000001B1000-memory.dmp

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memory/1284-85-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-99-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-89-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-91-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-98-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-5-0x0000000000400000-0x00000000005AF000-memory.dmp

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memory/1284-1-0x0000000002CD0000-0x0000000003CD0000-memory.dmp

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memory/1284-108-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-109-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-118-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-119-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/1284-128-0x0000000015BF0000-0x0000000016BF0000-memory.dmp

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memory/2844-67-0x0000000002170000-0x0000000002171000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads