modiloader | 42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd

Analysis

max time kernel
141s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
25/04/2024, 01:22

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General

Target
42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe
Size 1.6MB
Sample240425-brmglscg65
SHA256 42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd
MD5 2cc30d206669699e58870623365fef82
SHA1 de5e70f094d0b72660aa57b87667edd9d52971fc
SHA512 2f1f275b9a928844d8f97dc07aa4d0f53da61fd06a507424a873ba128e71d2754e710dbebe1935adc3dada94b42417b1fc30a1915a40b2cffc655c55d7c62005
SSDEEP 24576:7MkT4gLKu9KKozJQd/HJNRO/BhM6wIJp4m+3bu8U2flxAv:QkTpT9K1mzyhM6wW4mEQ2W
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

modiloader remcos remotehost persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

kenoss.duckdns.org:1166

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
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
fggrt
mouse_option
false
mutex
Rmc-L24XL1
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) 6 IoCs

resource	yara_rule
behavioral2/memory/1524-52-0x0000000000400000-0x0000000001400000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1524-55-0x0000000000400000-0x0000000001400000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1524-57-0x0000000000400000-0x0000000001400000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1524-59-0x0000000000400000-0x0000000001400000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1524-75-0x0000000000400000-0x0000000000482000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
behavioral2/memory/1524-70-0x0000000000400000-0x0000000001400000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM

ModiLoader Second Stage 1 IoCs

resource	yara_rule
behavioral2/memory/4440-2-0x0000000002EC0000-0x0000000003EC0000-memory.dmp	modiloader_stage2

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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	nmfsxfjX.pif

Executes dropped EXE 4 IoCs

pid	Process
4304	easinvoker.exe
4380	alpha.exe
1524	nmfsxfjX.pif
2000	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
4304	easinvoker.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Xjfxsfmn = "C:\\Users\\Public\\Xjfxsfmn.url"	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2288054676-1871194608-3559553667-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-L24XL1 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	nmfsxfjX.pif
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-L24XL1 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	nmfsxfjX.pif

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4440 set thread context of 1524	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	114

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

System Information Discovery
T1082

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 2 IoCs

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

description	flow	ioc
HTTP User-Agent header	62	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	65	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1284	powershell.exe
1284	powershell.exe
1284	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1284	powershell.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 4440 wrote to memory of 2624	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	98
PID 4440 wrote to memory of 2624	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	98
PID 4440 wrote to memory of 2624	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	98
PID 2624 wrote to memory of 3588	2624	cmd.exe	100
PID 2624 wrote to memory of 3588	2624	cmd.exe	100
PID 2624 wrote to memory of 3588	2624	cmd.exe	100
PID 2624 wrote to memory of 4592	2624	cmd.exe	101
PID 2624 wrote to memory of 4592	2624	cmd.exe	101
PID 2624 wrote to memory of 4592	2624	cmd.exe	101
PID 2624 wrote to memory of 3680	2624	cmd.exe	102
PID 2624 wrote to memory of 3680	2624	cmd.exe	102
PID 2624 wrote to memory of 3680	2624	cmd.exe	102
PID 2624 wrote to memory of 4300	2624	cmd.exe	103
PID 2624 wrote to memory of 4300	2624	cmd.exe	103
PID 2624 wrote to memory of 4300	2624	cmd.exe	103
PID 2624 wrote to memory of 2652	2624	cmd.exe	104
PID 2624 wrote to memory of 2652	2624	cmd.exe	104
PID 2624 wrote to memory of 2652	2624	cmd.exe	104
PID 2624 wrote to memory of 536	2624	cmd.exe	105
PID 2624 wrote to memory of 536	2624	cmd.exe	105
PID 2624 wrote to memory of 536	2624	cmd.exe	105
PID 2624 wrote to memory of 4304	2624	cmd.exe	106
PID 2624 wrote to memory of 4304	2624	cmd.exe	106
PID 4304 wrote to memory of 2268	4304	easinvoker.exe	107
PID 4304 wrote to memory of 2268	4304	easinvoker.exe	107
PID 2268 wrote to memory of 4136	2268	cmd.exe	109
PID 2268 wrote to memory of 4136	2268	cmd.exe	109
PID 2268 wrote to memory of 4380	2268	cmd.exe	110
PID 2268 wrote to memory of 4380	2268	cmd.exe	110
PID 4380 wrote to memory of 1284	4380	alpha.exe	111
PID 4380 wrote to memory of 1284	4380	alpha.exe	111
PID 4440 wrote to memory of 1520	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	113
PID 4440 wrote to memory of 1520	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	113
PID 4440 wrote to memory of 1520	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	113
PID 4440 wrote to memory of 1524	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	114
PID 4440 wrote to memory of 1524	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	114
PID 4440 wrote to memory of 1524	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	114
PID 4440 wrote to memory of 1524	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	114
PID 4440 wrote to memory of 1524	4440	42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe	114
PID 1524 wrote to memory of 2000	1524	nmfsxfjX.pif	115
PID 1524 wrote to memory of 2000	1524	nmfsxfjX.pif	115
PID 1524 wrote to memory of 2000	1524	nmfsxfjX.pif	115

C:\Users\Admin\AppData\Local\Temp\42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe
"C:\Users\Admin\AppData\Local\Temp\42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4440
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\XjfxsfmnO.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2624
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
    3⤵
    PID:3588
- - C:\Windows\SysWOW64\xcopy.exe
    xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
    3⤵
    - Enumerates system info in registry
    PID:4592
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
    3⤵
    PID:3680
- - C:\Windows\SysWOW64\xcopy.exe
    xcopy "Aaa.bat" "C:\Windows \System32\" /K /D /H /Y
    3⤵
    - Enumerates system info in registry
    PID:4300
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
    3⤵
    PID:2652
- - C:\Windows\SysWOW64\xcopy.exe
    xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
    3⤵
    - Enumerates system info in registry
    PID:536
- - C:\Windows \System32\easinvoker.exe
    "C:\Windows \System32\easinvoker.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:4304
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\windows \system32\aaa.bat""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2268
    - - C:\Windows\System32\extrac32.exe
        
        C:\\Windows\\System32\\extrac32.exe /C /Y C:\\Windows\\System32\\cmd.exe C:\\Users\\Public\\alpha.exe
        5⤵
        
        PID:4136
    - - 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:4380
      - 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:1284
- C:\Windows\SysWOW64\extrac32.exe
  C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\42ac8e7e9df9877af1382f5626fd74e63210d307f6d577cd5b387ffd0c9520bd.exe C:\\Users\\Public\\Libraries\\Xjfxsfmn.PIF
  2⤵
  PID:1520
- C:\Users\Public\Libraries\nmfsxfjX.pif
  C:\Users\Public\Libraries\nmfsxfjX.pif
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1524
- - C:\ProgramData\Remcos\remcos.exe
    "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    PID:2000

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

Replay Monitor

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Downloads

__PSScriptPolicyTest_i1dkxpit.1bb.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_i1dkxpit.1bb.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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XjfxsfmnO.bat

Path C:\Users\Public\Libraries\XjfxsfmnO.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

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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

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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

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nmfsxfjX.pif

Path C:\Users\Public\Libraries\nmfsxfjX.pif
Size 66KB
SHA256 7bcdc2e607abc65ef93afd009c3048970d9e8d1c2a18fc571562396b13ebb301
MD5 c116d3604ceafe7057d77ff27552c215
SHA1 452b14432fb5758b46f2897aeccd89f7c82a727d
SHA512 9202a00eeaf4c5be94de32fd41bfea40fc32d368955d49b7bad2b5c23c4ebc92dccb37d99f5a14e53ad674b63f1baa6efb1feb27225c86693ead3262a26d66c6
SSDEEP 1536:lR2rJpByeL+39Ua1ITgA8wpuO5CU4GGMGcT4idU:lR2lg9Ua1egkCU60U
MD5 SHA1 SHA512 SSDEEP

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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

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memory/1284-41-0x00007FFC48F40000-0x00007FFC49A01000-memory.dmp

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memory/1284-45-0x00007FFC48F40000-0x00007FFC49A01000-memory.dmp

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memory/1284-42-0x000001ECB96D0000-0x000001ECB96E0000-memory.dmp

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memory/1284-31-0x000001ECB9C50000-0x000001ECB9C72000-memory.dmp

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memory/1524-52-0x0000000000400000-0x0000000001400000-memory.dmp

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memory/1524-55-0x0000000000400000-0x0000000001400000-memory.dmp

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memory/1524-57-0x0000000000400000-0x0000000001400000-memory.dmp

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memory/1524-59-0x0000000000400000-0x0000000001400000-memory.dmp

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memory/1524-75-0x0000000000400000-0x0000000000482000-memory.dmp

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memory/1524-70-0x0000000000400000-0x0000000001400000-memory.dmp

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memory/2000-74-0x0000000000400000-0x000000000041A000-memory.dmp

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memory/4304-24-0x00000000613C0000-0x00000000613E3000-memory.dmp

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memory/4440-1-0x0000000002EC0000-0x0000000003EC0000-memory.dmp

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memory/4440-4-0x0000000000400000-0x0000000000598000-memory.dmp

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memory/4440-2-0x0000000002EC0000-0x0000000003EC0000-memory.dmp

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memory/4440-0-0x0000000002330000-0x0000000002331000-memory.dmp

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