modiloader | b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3

General

Target

b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe
Size

110KB
MD5

4fccf442a517578100107113600c0e5f
SHA1

edd14b670a0d1cefbc78c77c24b4d2310c974f30
SHA256

b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3
SHA512

7e289c03dd40e9864919553ea6f97afed490188380e24390fbee8bba95d3c833c443bc5c5416894052308ff5f3dd0e229d90799ea69f489048ba8d492c85355a
SSDEEP

1536:SVuNAXTj4Fj/91/NnLZqeWEPVpa8DzePjkgcwYS7S5+Vfk09+2W8zKcTcVtnouy8:woy8j7VnNdrPHaSekwi+mW+2PdTGout

Score

10^/10

modiloader evasion persistence trojan upx

Malware Config

Signatures

ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader
UAC bypass 3 TTPs 1 IoCs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112

Processes:

mstwain32.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" mstwain32.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe

ModiLoader Second Stage 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1304-55-0x0000000000400000-0x000000000044F000-memory.dmp	modiloader_stage2
behavioral1/memory/1304-62-0x0000000000400000-0x000000000044F000-memory.dmp	modiloader_stage2
behavioral1/memory/748-63-0x0000000000400000-0x000000000044F000-memory.dmp	modiloader_stage2

Executes dropped EXE 1 IoCs

Processes:

mstwain32.exe

pid process

748 mstwain32.exe

pid	process
748	mstwain32.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/1304-55-0x0000000000400000-0x000000000044F000-memory.dmp	upx
C:\Windows\mstwain32.exe	upx
behavioral1/memory/748-61-0x0000000000400000-0x000000000044F000-memory.dmp	upx
behavioral1/memory/1304-62-0x0000000000400000-0x000000000044F000-memory.dmp	upx
behavioral1/memory/748-63-0x0000000000400000-0x000000000044F000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

mstwain32.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\	mstwain32.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\mstwain32 = "C:\\Windows\\mstwain32.exe"	mstwain32.exe

Checks whether UAC is enabled 1 TTPs 3 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exemstwain32.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	mstwain32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe

Drops file in Windows directory 4 IoCs

Processes:

b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exemstwain32.exe

description	ioc	process
File created	C:\Windows\mstwain32.exe	b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe
File opened for modification	C:\Windows\mstwain32.exe	b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe
File created	C:\Windows\ntdtcstp.dll	mstwain32.exe
File created	C:\Windows\cmsetac.dll	mstwain32.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exevssvc.exemstwain32.exe

description	pid	process
Token: SeDebugPrivilege	1304	b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe
Token: SeBackupPrivilege	1232	vssvc.exe
Token: SeRestorePrivilege	1232	vssvc.exe
Token: SeAuditPrivilege	1232	vssvc.exe
Token: SeDebugPrivilege	748	mstwain32.exe
Token: SeDebugPrivilege	748	mstwain32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

mstwain32.exe

pid process

748 mstwain32.exe
748 mstwain32.exe

pid	process
748	mstwain32.exe
748	mstwain32.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe

description	pid	process	target process
PID 1304 wrote to memory of 748	1304	b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe	mstwain32.exe
PID 1304 wrote to memory of 748	1304	b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe	mstwain32.exe
PID 1304 wrote to memory of 748	1304	b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe	mstwain32.exe
PID 1304 wrote to memory of 748	1304	b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe	mstwain32.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

mstwain32.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" mstwain32.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	mstwain32.exe

C:\Users\Admin\AppData\Local\Temp\b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe
"C:\Users\Admin\AppData\Local\Temp\b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe"
1⤵
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1304

C:\Windows\mstwain32.exe
"C:\Windows\mstwain32.exe" \melt "C:\Users\Admin\AppData\Local\Temp\b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3.exe"
2⤵
- UAC bypass
- Executes dropped EXE
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- System policy modification
PID:748

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1232

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Bypass User Account Control

1

T1088

Disabling Security Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\mstwain32.exe
Filesize
110KB

MD5
4fccf442a517578100107113600c0e5f

SHA1
edd14b670a0d1cefbc78c77c24b4d2310c974f30

SHA256
b1a4423932b42fbe7f939599bdc4b8efda756a914d2cdceba2d991c533affdf3

SHA512
7e289c03dd40e9864919553ea6f97afed490188380e24390fbee8bba95d3c833c443bc5c5416894052308ff5f3dd0e229d90799ea69f489048ba8d492c85355a

Download Submit
memory/748-56-0x0000000000000000-mapping.dmp

Download
memory/748-61-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/748-63-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/748-64-0x0000000000720000-0x000000000072E000-memory.dmp

Filesize
56KB

Download
memory/1304-54-0x0000000075F01000-0x0000000075F03000-memory.dmp

Filesize
8KB

Download
memory/1304-55-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download
memory/1304-59-0x0000000000680000-0x0000000000690000-memory.dmp

Filesize
64KB

Download
memory/1304-60-0x00000000023F0000-0x000000000243F000-memory.dmp

Filesize
316KB

Download
memory/1304-62-0x0000000000400000-0x000000000044F000-memory.dmp

Filesize
316KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads