modiloader | 75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2024, 23:12

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General

Target

75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe
Size

90KB
MD5

7ae1b36cec224de2d9828f0218890fc2
SHA1

5f386a32e1d2817540c61807c2a88a103b59a0ac
SHA256

75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2
SHA512

bf35e301e5b822d3dbe543074f5fe7dc177324e40fbea20f67e94880fa7c53b11adf88b3cd574c8b00f69a5512ee9b9147b6300b383bf866072733e9002734c4
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDK:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3Y

Score

10^/10

modiloader persistence trojan upx

Malware Config

Signatures

ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader

Detects Windows executables referencing non-Windows User-Agents 5 IoCs

resource	yara_rule
behavioral2/memory/4900-51-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/4900-50-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/4900-49-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/4900-58-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/4900-60-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

ModiLoader Second Stage 5 IoCs

resource	yara_rule
behavioral2/memory/4900-51-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4900-50-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4900-49-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4900-58-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4900-60-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

UPX dump on OEP (original entry point) 16 IoCs

resource	yara_rule
behavioral2/memory/1192-0-0x0000000000400000-0x0000000000453000-memory.dmp	UPX
behavioral2/memory/336-8-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/336-11-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/1192-13-0x0000000000400000-0x0000000000453000-memory.dmp	UPX
behavioral2/memory/336-10-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/files/0x0008000000022ad3-29.dat	UPX
behavioral2/memory/4900-42-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/4900-51-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/4900-50-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/336-57-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/4900-49-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/4744-48-0x0000000000400000-0x0000000000453000-memory.dmp	UPX
behavioral2/memory/4900-47-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/4900-58-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/4592-59-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/4900-60-0x0000000000400000-0x0000000000414000-memory.dmp	UPX

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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe

Executes dropped EXE 3 IoCs

pid	Process
4744	csrsll.exe
4592	csrsll.exe
4900	csrsll.exe

UPX packed file 16 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1192-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/336-8-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/336-11-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1192-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/336-10-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x0008000000022ad3-29.dat	upx
behavioral2/memory/4900-42-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4900-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4900-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/336-57-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4900-49-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4744-48-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4900-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4900-58-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4592-59-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4900-60-0x0000000000400000-0x0000000000414000-memory.dmp	upx

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-1-5-21-2804150937-2146708401-419095071-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1192 set thread context of 336	1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	91
PID 4744 set thread context of 4592	4744	csrsll.exe	99
PID 4744 set thread context of 4900	4744	csrsll.exe	100

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe
Token: SeDebugPrivilege	4592	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe
336	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe
4744	csrsll.exe
4592	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1192 wrote to memory of 336	1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	91
PID 1192 wrote to memory of 336	1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	91
PID 1192 wrote to memory of 336	1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	91
PID 1192 wrote to memory of 336	1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	91
PID 1192 wrote to memory of 336	1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	91
PID 1192 wrote to memory of 336	1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	91
PID 1192 wrote to memory of 336	1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	91
PID 1192 wrote to memory of 336	1192	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	91
PID 336 wrote to memory of 2344	336	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	94
PID 336 wrote to memory of 2344	336	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	94
PID 336 wrote to memory of 2344	336	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	94
PID 2344 wrote to memory of 1552	2344	cmd.exe	97
PID 2344 wrote to memory of 1552	2344	cmd.exe	97
PID 2344 wrote to memory of 1552	2344	cmd.exe	97
PID 336 wrote to memory of 4744	336	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	98
PID 336 wrote to memory of 4744	336	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	98
PID 336 wrote to memory of 4744	336	75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe	98
PID 4744 wrote to memory of 4592	4744	csrsll.exe	99
PID 4744 wrote to memory of 4592	4744	csrsll.exe	99
PID 4744 wrote to memory of 4592	4744	csrsll.exe	99
PID 4744 wrote to memory of 4592	4744	csrsll.exe	99
PID 4744 wrote to memory of 4592	4744	csrsll.exe	99
PID 4744 wrote to memory of 4592	4744	csrsll.exe	99
PID 4744 wrote to memory of 4592	4744	csrsll.exe	99
PID 4744 wrote to memory of 4592	4744	csrsll.exe	99
PID 4744 wrote to memory of 4900	4744	csrsll.exe	100
PID 4744 wrote to memory of 4900	4744	csrsll.exe	100
PID 4744 wrote to memory of 4900	4744	csrsll.exe	100
PID 4744 wrote to memory of 4900	4744	csrsll.exe	100
PID 4744 wrote to memory of 4900	4744	csrsll.exe	100
PID 4744 wrote to memory of 4900	4744	csrsll.exe	100
PID 4744 wrote to memory of 4900	4744	csrsll.exe	100
PID 4744 wrote to memory of 4900	4744	csrsll.exe	100

C:\Users\Admin\AppData\Local\Temp\75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe
"C:\Users\Admin\AppData\Local\Temp\75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1192
- C:\Users\Admin\AppData\Local\Temp\75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe
  "C:\Users\Admin\AppData\Local\Temp\75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:336
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\NSXEF.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2344
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Win Pdf" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe" /f
      4⤵
      Adds Run key to start application
      PID:1552
- - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4744
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:4592
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      PID:4900

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

C:\Users\Admin\AppData\Local\Temp\NSXEF.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe

Filesize
90KB

MD5
7ae1b36cec224de2d9828f0218890fc2

SHA1
5f386a32e1d2817540c61807c2a88a103b59a0ac

SHA256
75e7be8f467d55b479d346a0d45e91b7589b20fca4292c21a62f03c775424fc2

SHA512
bf35e301e5b822d3dbe543074f5fe7dc177324e40fbea20f67e94880fa7c53b11adf88b3cd574c8b00f69a5512ee9b9147b6300b383bf866072733e9002734c4

Download Submit
memory/336-11-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/336-57-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/336-8-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/336-10-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1192-6-0x0000000002A40000-0x0000000002A42000-memory.dmp

Filesize
8KB

Download
memory/1192-3-0x0000000002A20000-0x0000000002A22000-memory.dmp

Filesize
8KB

Download
memory/1192-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1192-5-0x0000000002A30000-0x0000000002A32000-memory.dmp

Filesize
8KB

Download
memory/1192-7-0x0000000002A50000-0x0000000002A52000-memory.dmp

Filesize
8KB

Download
memory/1192-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4592-59-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4744-48-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4900-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4900-49-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4900-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4900-47-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4900-58-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4900-42-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4900-60-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads