modiloader | a681967d5d91f1def07dcde80d561b9621381760b781c970746673d53e7bfcd7

General

Target

PO AR483-1590436 _ J-3000 PROJT.xlsx
Size

55KB
MD5

245fa98d0fc156ccd21c92b31ec8c5c7
SHA1

b5cabd660aafef98fc3fbc987aa1bc4d5884fa17
SHA256

a681967d5d91f1def07dcde80d561b9621381760b781c970746673d53e7bfcd7
SHA512

b78e1f36524ddb9a76d36ee809150bd8cf0f2a0a3ae747d79046e6cb5a14e863485e0740c2a860b7f40be19b70f2607c0cd9f1a753facf8c41d4c7c2cd22c3b7

Score

10^/10

modiloader remcos persistence rat trojan

Malware Config

Extracted

Family

remcos

C2

4sureme.ddns.net:4902

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 First Stage 5 IoCs

Processes:

resource	yara_rule
\Users\Public\vbc.exe	modiloader_stage1
\Users\Public\vbc.exe	modiloader_stage1
\Users\Public\vbc.exe	modiloader_stage1
C:\Users\Public\vbc.exe	modiloader_stage1
C:\Users\Public\vbc.exe	modiloader_stage1

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

16 364 EQNEDT32.EXE
Executes dropped EXE 1 IoCs

Processes:

vbc.exe

pid process

1416 vbc.exe
Abuses OpenXML format to download file from external location
Loads dropped DLL 3 IoCs

Processes:

EQNEDT32.EXE

pid process

364 EQNEDT32.EXE
364 EQNEDT32.EXE
364 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
16	364	EQNEDT32.EXE

pid	process
1416	vbc.exe

pid	process
364	EQNEDT32.EXE
364	EQNEDT32.EXE
364	EQNEDT32.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rvchn = "C:\\Users\\Admin\\nhcvR.url"	vbc.exe

Office loads VBA resources, possible macro or embedded object present
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
exploit

Exploitation for Client Execution
T1203

Processes:

EQNEDT32.EXE

pid process

364 EQNEDT32.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

pid	process
364	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13	vbc.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 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	vbc.exe

Script User-Agent 2 IoCs

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

Processes:

description	flow	ioc
HTTP User-Agent header	18	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
HTTP User-Agent header	20	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1648 EXCEL.EXE
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

EXCEL.EXEWINWORD.EXEieinstal.exe

pid process

1648 EXCEL.EXE
1648 EXCEL.EXE
1648 EXCEL.EXE
1104 WINWORD.EXE
1104 WINWORD.EXE
1804 ieinstal.exe

pid	process
1648	EXCEL.EXE

pid	process
1648	EXCEL.EXE
1648	EXCEL.EXE
1648	EXCEL.EXE
1104	WINWORD.EXE
1104	WINWORD.EXE
1804	ieinstal.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

EQNEDT32.EXEWINWORD.EXEvbc.exe

description	pid	process	target process
PID 364 wrote to memory of 1416	364	EQNEDT32.EXE	vbc.exe
PID 364 wrote to memory of 1416	364	EQNEDT32.EXE	vbc.exe
PID 364 wrote to memory of 1416	364	EQNEDT32.EXE	vbc.exe
PID 364 wrote to memory of 1416	364	EQNEDT32.EXE	vbc.exe
PID 1104 wrote to memory of 308	1104	WINWORD.EXE	splwow64.exe
PID 1104 wrote to memory of 308	1104	WINWORD.EXE	splwow64.exe
PID 1104 wrote to memory of 308	1104	WINWORD.EXE	splwow64.exe
PID 1104 wrote to memory of 308	1104	WINWORD.EXE	splwow64.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe
PID 1416 wrote to memory of 1804	1416	vbc.exe	ieinstal.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\PO AR483-1590436 _ J-3000 PROJT.xlsx"
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1648

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" -Embedding
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1104

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:308

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:364

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Modifies system certificate store
- Suspicious use of WriteProcessMemory
PID:1416

C:\Program Files (x86)\internet explorer\ieinstal.exe
"C:\Program Files (x86)\internet explorer\ieinstal.exe"
3⤵
- Suspicious use of SetWindowsHookEx
PID:1804

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Exploitation for Client Execution

1

T1203

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

3

T1112

Install Root Certificate

1

T1130

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\I4HTQEUG\document[1].doc
MD5
6d238a412f808d2c4c56865d7f4c4d16

SHA1
cf2c952dd7303167d7e666763dcf278088190f52

SHA256
a4ab58cc18771c7141e96d45714b7aeb046ff7173ec5266f08da7b28d411744e

SHA512
764bc68ac1f55d2b0b717ec8434f22c8bc5baf50cfa517e8d0fbae22f2419332d33f67d5dc41bab415e5e68af9b42c41df8262f25ea105f65c4984e8c5c3fbe8

Download Submit
C:\Users\Public\vbc.exe
MD5
ae8ba034c111e338ffc8cced610e23c7

SHA1
edfd786403ebea26e612b0240b1ce980f170f245

SHA256
6cdb03bc316fbf184d610d24d85ca86ec2269413ae8ae8ac87f296afb08dacea

SHA512
bbae7a78743ded59170bab7fa5a2a240ab24fbe065f39d0c00d13655fefba4074d23e952ca994945a722f24dedee6d59c8d2ca0569f2497a1e3f82b1490c2b42

Download Submit
C:\Users\Public\vbc.exe
MD5
ae8ba034c111e338ffc8cced610e23c7

SHA1
edfd786403ebea26e612b0240b1ce980f170f245

SHA256
6cdb03bc316fbf184d610d24d85ca86ec2269413ae8ae8ac87f296afb08dacea

SHA512
bbae7a78743ded59170bab7fa5a2a240ab24fbe065f39d0c00d13655fefba4074d23e952ca994945a722f24dedee6d59c8d2ca0569f2497a1e3f82b1490c2b42

Download Submit
\Users\Public\vbc.exe
MD5
ae8ba034c111e338ffc8cced610e23c7

SHA1
edfd786403ebea26e612b0240b1ce980f170f245

SHA256
6cdb03bc316fbf184d610d24d85ca86ec2269413ae8ae8ac87f296afb08dacea

SHA512
bbae7a78743ded59170bab7fa5a2a240ab24fbe065f39d0c00d13655fefba4074d23e952ca994945a722f24dedee6d59c8d2ca0569f2497a1e3f82b1490c2b42

Download Submit
\Users\Public\vbc.exe
MD5
ae8ba034c111e338ffc8cced610e23c7

SHA1
edfd786403ebea26e612b0240b1ce980f170f245

SHA256
6cdb03bc316fbf184d610d24d85ca86ec2269413ae8ae8ac87f296afb08dacea

SHA512
bbae7a78743ded59170bab7fa5a2a240ab24fbe065f39d0c00d13655fefba4074d23e952ca994945a722f24dedee6d59c8d2ca0569f2497a1e3f82b1490c2b42

Download Submit
\Users\Public\vbc.exe
MD5
ae8ba034c111e338ffc8cced610e23c7

SHA1
edfd786403ebea26e612b0240b1ce980f170f245

SHA256
6cdb03bc316fbf184d610d24d85ca86ec2269413ae8ae8ac87f296afb08dacea

SHA512
bbae7a78743ded59170bab7fa5a2a240ab24fbe065f39d0c00d13655fefba4074d23e952ca994945a722f24dedee6d59c8d2ca0569f2497a1e3f82b1490c2b42

Download Submit
memory/308-16-0x0000000000000000-mapping.dmp

Download
memory/308-18-0x000007FEFB6F1000-0x000007FEFB6F3000-memory.dmp

Filesize
8KB

Download
memory/364-10-0x0000000074B31000-0x0000000074B33000-memory.dmp

Filesize
8KB

Download
memory/1104-6-0x000000006B241000-0x000000006B244000-memory.dmp

Filesize
12KB

Download
memory/1416-14-0x0000000000000000-mapping.dmp

Download
memory/1416-17-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/1648-3-0x0000000071001000-0x0000000071003000-memory.dmp

Filesize
8KB

Download
memory/1648-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1648-2-0x000000002FC01000-0x000000002FC04000-memory.dmp

Filesize
12KB

Download
memory/1804-21-0x0000000000000000-mapping.dmp

Download
memory/1804-20-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/1804-22-0x0000000000110000-0x0000000000111000-memory.dmp

Filesize
4KB

Download
memory/1804-25-0x0000000000140000-0x0000000000141000-memory.dmp

Filesize
4KB

Download
memory/1804-30-0x0000000010540000-0x0000000010564000-memory.dmp

Filesize
144KB

Download
memory/1804-31-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/1956-5-0x000007FEF7080000-0x000007FEF72FA000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads