modiloader | a5d2422238cd2d0a94e38de3a0361c1a81b9ff33991b75c5b0f650eb38a04c05

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
23/04/2024, 01:39

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General

Target
Quotation 20242204.exe
Size 1.6MB
Sample240423-b3dzlsbb27
SHA256 25adcfe6b38aead70b4b0020ecba72d0343b6f3d3bb406100593b7f1349e0300
MD5 603c7916d424615645d6ee0fffa00011
SHA1 6f464f23eb81606067f93036dc5cdc61f7bb855b
SHA512 f400834902c5886b680fa8376fee88c77ec352b0a00221e98fbe268d71ac6feb0826fb5c53d71cb66cc457d6b3a64c3c881f059dd75bb9b097d51868ea07cf90
SSDEEP 24576:7MkT4gLKu9KKozJQd/HJNRO/BqM6wIJp4m+3bu8U2flxAv:QkTpT9K1mzyqM6wW4mEQ2W
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

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 16 IoCs

resource	yara_rule
behavioral2/memory/1092-49-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-51-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-52-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-53-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-54-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-55-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-56-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-57-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-62-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-63-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-73-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-74-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-84-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-85-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-95-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1092-96-0x00000000158B0000-0x00000000168B0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

ModiLoader Second Stage 1 IoCs

resource	yara_rule
behavioral2/memory/1092-2-0x0000000002ED0000-0x0000000003ED0000-memory.dmp	modiloader_stage2

Executes dropped EXE 2 IoCs

pid	Process
4576	easinvoker.exe
996	alpha.exe

Loads dropped DLL 1 IoCs

pid	Process
4576	easinvoker.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-1-5-21-1132431369-515282257-1998160155-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rwksdoeb = "C:\\Users\\Public\\Rwksdoeb.url"	Quotation 20242204.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\Identifier	xcopy.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	xcopy.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	xcopy.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	45	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4476	powershell.exe
4476	powershell.exe
4476	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4476	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1092	Quotation 20242204.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 1092 wrote to memory of 4132	1092	Quotation 20242204.exe	98
PID 1092 wrote to memory of 4132	1092	Quotation 20242204.exe	98
PID 1092 wrote to memory of 4132	1092	Quotation 20242204.exe	98
PID 4132 wrote to memory of 2768	4132	cmd.exe	100
PID 4132 wrote to memory of 2768	4132	cmd.exe	100
PID 4132 wrote to memory of 2768	4132	cmd.exe	100
PID 4132 wrote to memory of 64	4132	cmd.exe	101
PID 4132 wrote to memory of 64	4132	cmd.exe	101
PID 4132 wrote to memory of 64	4132	cmd.exe	101
PID 4132 wrote to memory of 5092	4132	cmd.exe	102
PID 4132 wrote to memory of 5092	4132	cmd.exe	102
PID 4132 wrote to memory of 5092	4132	cmd.exe	102
PID 4132 wrote to memory of 2380	4132	cmd.exe	103
PID 4132 wrote to memory of 2380	4132	cmd.exe	103
PID 4132 wrote to memory of 2380	4132	cmd.exe	103
PID 4132 wrote to memory of 2716	4132	cmd.exe	104
PID 4132 wrote to memory of 2716	4132	cmd.exe	104
PID 4132 wrote to memory of 2716	4132	cmd.exe	104
PID 4132 wrote to memory of 2652	4132	cmd.exe	105
PID 4132 wrote to memory of 2652	4132	cmd.exe	105
PID 4132 wrote to memory of 2652	4132	cmd.exe	105
PID 4132 wrote to memory of 4576	4132	cmd.exe	106
PID 4132 wrote to memory of 4576	4132	cmd.exe	106
PID 4576 wrote to memory of 4472	4576	easinvoker.exe	107
PID 4576 wrote to memory of 4472	4576	easinvoker.exe	107
PID 4472 wrote to memory of 3588	4472	cmd.exe	109
PID 4472 wrote to memory of 3588	4472	cmd.exe	109
PID 4472 wrote to memory of 996	4472	cmd.exe	110
PID 4472 wrote to memory of 996	4472	cmd.exe	110
PID 996 wrote to memory of 4476	996	alpha.exe	111
PID 996 wrote to memory of 4476	996	alpha.exe	111
PID 1092 wrote to memory of 1380	1092	Quotation 20242204.exe	112
PID 1092 wrote to memory of 1380	1092	Quotation 20242204.exe	112
PID 1092 wrote to memory of 1380	1092	Quotation 20242204.exe	112

C:\Users\Admin\AppData\Local\Temp\Quotation 20242204.exe
"C:\Users\Admin\AppData\Local\Temp\Quotation 20242204.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1092
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\RwksdoebO.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4132
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
    3⤵
    PID:2768
- - C:\Windows\SysWOW64\xcopy.exe
    xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
    3⤵
    - Enumerates system info in registry
    PID:64
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
    3⤵
    PID:5092
- - C:\Windows\SysWOW64\xcopy.exe
    xcopy "Aaa.bat" "C:\Windows \System32\" /K /D /H /Y
    3⤵
    - Enumerates system info in registry
    PID:2380
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
    3⤵
    PID:2716
- - C:\Windows\SysWOW64\xcopy.exe
    xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
    3⤵
    - Enumerates system info in registry
    PID:2652
- - C:\Windows \System32\easinvoker.exe
    "C:\Windows \System32\easinvoker.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:4576
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\windows \system32\aaa.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4472
    - - C:\Windows\System32\extrac32.exe
        
        C:\\Windows\\System32\\extrac32.exe /C /Y C:\\Windows\\System32\\cmd.exe C:\\Users\\Public\\alpha.exe
        5⤵
        
        PID:3588
    - - C:\Users\Public\alpha.exe
        
        C:\\Users\\Public\\alpha /c powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
        5⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        
        PID:996
      - 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:4476
- C:\Windows\SysWOW64\extrac32.exe
  C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\Quotation 20242204.exe C:\\Users\\Public\\Libraries\\Rwksdoeb.PIF
  2⤵
  PID:1380

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

Query Registry

T1012

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 37942f2dc95bdc242340a7caa0b47dd4dfdd7fc11bf34a8e81a8269449edc69c
MD5 e70fa2aab5cfb0d7c6401eb3a0769a7f
SHA1 5e5f36a1e0ec49fdfda635b6caa17c2a028a1c7a
SHA512 faa7b674b5c525c14cc8fdc42b475fdbd3c6a1d4a12307770c7d3afa8e7b13da015e357b5c63f32cc71a313e7bea305e83affdada0413cf860221c3d0877a67d
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_qvnrwh1q.pvd.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qvnrwh1q.pvd.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

RwksdoebO.bat

Path C:\Users\Public\Libraries\RwksdoebO.bat
Size 29KB
SHA256 abac4a967800f5da708572ec42441ec373cd52459a83a8a382d6b8579482789d
MD5 828ffbf60677999579dafe4bf3919c63
SHA1 a0d159a1b9a49e9eaccc53fe0c3266c0526a1bdc
SHA512 bf00909e24c5a6fb2346e8457a9adacd5f1b35988d90abbde9ff26896bbb59edafea60d9db4d10182a7b5e129bb69585d3e20bc5c63af3517b3a7ef1e45ffb7e
SSDEEP 192:IBOY7cKQ/CyntVZjpubO0bXWQtagxP2+3o5WIGbfJTAy:C
MD5 SHA1 SHA512 SSDEEP

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aaa.bat

Path C:\Users\Public\Libraries\aaa.bat
Size 3KB
SHA256 11c20fabf677cd77e8a354b520f6ffca09cac37ce15c9932550e749e49efe08a
MD5 71e46efe9932b83b397b44052513fb49
SHA1 741af3b8c31095a0cc2c39c41e62279684913205
SHA512 76da3b441c0eaaaabdd4d21b0a3d4aa7fd49d73a5f0dab2cfb39f2e114efe4f4dabe2d46b01b66d810d6e0efa97676599ece5c213c1a69a5f2f4897a9b4ac8da
MD5 SHA1 SHA512

Submit Download

easinvoker.exe

Path C:\Users\Public\Libraries\easinvoker.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:\Users\Public\Libraries\netutils.dll
Size 114KB
SHA256 a692d4305b95e57e2cfc871d53a41a5bfc9e306cb1a86ca1159db4f469598714
MD5 566b326055c3ed8e2028aa1e2c1054d0
SHA1 c25fa6d6369c083526cafcf45b5f554635afe218
SHA512 da4b0b45d47757b69f9abc1817d3cb3c85deb08658e55f07b016fba053efe541a5791b9b2b380c25b440bbae6916c5a2245261553ca3c5025d9d55c943f9823c
SSDEEP 1536:AxdWID3z1y5XtsBms9bOPu5jDqWte6VNCl7MbiRvRRJHu:AxdB/usBLOP8qWte6VQRRJHu
MD5 SHA1 SHA512 SSDEEP

Submit Download

alpha.exe

Path C:\Users\Public\alpha.exe
Size 283KB
SHA256 b99d61d874728edc0918ca0eb10eab93d381e7367e377406e65963366c874450
MD5 8a2122e8162dbef04694b9c3e0b6cdee
SHA1 f1efb0fddc156e4c61c5f78a54700e4e7984d55d
SHA512 99e784141193275d4364ba1b8762b07cc150ca3cb7e9aa1d4386ba1fa87e073d0500e61572f8d1b071f2faa2a51bb123e12d9d07054b59a1a2fd768ad9f24397
SSDEEP 6144:k4WA1B9BxDfQWKORSqY4zOcmpdlc3gJdmtolSm:H1BhkWvSqY4zvmjOwJIT
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1092-63-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-73-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-4-0x0000000000400000-0x0000000000598000-memory.dmp

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memory/1092-2-0x0000000002ED0000-0x0000000003ED0000-memory.dmp

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memory/1092-96-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-95-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-85-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-84-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-49-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-51-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-52-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-53-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-54-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-55-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-56-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-57-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-62-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/1092-0-0x0000000000790000-0x0000000000791000-memory.dmp

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memory/1092-1-0x0000000002ED0000-0x0000000003ED0000-memory.dmp

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memory/1092-74-0x00000000158B0000-0x00000000168B0000-memory.dmp

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memory/4476-45-0x00007FFDBF8E0000-0x00007FFDC03A1000-memory.dmp

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memory/4476-42-0x00000264196D0000-0x00000264196E0000-memory.dmp

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memory/4476-41-0x00007FFDBF8E0000-0x00007FFDC03A1000-memory.dmp

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memory/4476-40-0x0000026419C30000-0x0000026419C52000-memory.dmp

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memory/4576-24-0x00000000613C0000-0x00000000613E3000-memory.dmp

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