modiloader | c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a

Analysis

max time kernel
119s
max time network
119s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11/12/2024, 14:04

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General

Target

c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe
Size

90KB
MD5

020c961fd74da7397c4e09418ca9c925
SHA1

43e3b01022e12965e885e04c6b2a62e1ef4028a4
SHA256

c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a
SHA512

a2b75381a4d4949f0fedfe750d1c1c1f3bae27cff4aa2bb6d57b593407147755a0f0a9ac6509223e3a51bb130acd8b6db8984a84a89d40b86be5a7535f3f610b
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDt:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3P

Score

10^/10

modiloader discovery persistence trojan upx

Malware Config

Signatures

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

ModiLoader Second Stage 4 IoCs

resource	yara_rule
behavioral2/memory/1360-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1360-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1360-51-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1360-61-0x0000000000400000-0x0000000000414000-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-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe

Executes dropped EXE 3 IoCs

pid	Process
1952	csrsll.exe
2860	csrsll.exe
1360	csrsll.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-1-5-21-940901362-3608833189-1915618603-1000\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 4304 set thread context of 4940	4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	91
PID 1952 set thread context of 2860	1952	csrsll.exe	103
PID 1952 set thread context of 1360	1952	csrsll.exe	104

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4304-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4304-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4940-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4940-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4304-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4940-11-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x0008000000023cb4-28.dat	upx
behavioral2/memory/4940-38-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1952-39-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1952-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1360-49-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1360-44-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1952-56-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1360-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4940-59-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1360-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1360-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2860-60-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1360-61-0x0000000000400000-0x0000000000414000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe
Token: SeDebugPrivilege	2860	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe
4940	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe
1952	csrsll.exe
2860	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4304 wrote to memory of 4940	4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	91
PID 4304 wrote to memory of 4940	4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	91
PID 4304 wrote to memory of 4940	4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	91
PID 4304 wrote to memory of 4940	4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	91
PID 4304 wrote to memory of 4940	4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	91
PID 4304 wrote to memory of 4940	4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	91
PID 4304 wrote to memory of 4940	4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	91
PID 4304 wrote to memory of 4940	4304	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	91
PID 4940 wrote to memory of 1428	4940	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	92
PID 4940 wrote to memory of 1428	4940	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	92
PID 4940 wrote to memory of 1428	4940	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	92
PID 1428 wrote to memory of 4560	1428	cmd.exe	96
PID 1428 wrote to memory of 4560	1428	cmd.exe	96
PID 1428 wrote to memory of 4560	1428	cmd.exe	96
PID 4940 wrote to memory of 1952	4940	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	97
PID 4940 wrote to memory of 1952	4940	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	97
PID 4940 wrote to memory of 1952	4940	c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe	97
PID 1952 wrote to memory of 2860	1952	csrsll.exe	103
PID 1952 wrote to memory of 2860	1952	csrsll.exe	103
PID 1952 wrote to memory of 2860	1952	csrsll.exe	103
PID 1952 wrote to memory of 2860	1952	csrsll.exe	103
PID 1952 wrote to memory of 2860	1952	csrsll.exe	103
PID 1952 wrote to memory of 2860	1952	csrsll.exe	103
PID 1952 wrote to memory of 2860	1952	csrsll.exe	103
PID 1952 wrote to memory of 2860	1952	csrsll.exe	103
PID 1952 wrote to memory of 1360	1952	csrsll.exe	104
PID 1952 wrote to memory of 1360	1952	csrsll.exe	104
PID 1952 wrote to memory of 1360	1952	csrsll.exe	104
PID 1952 wrote to memory of 1360	1952	csrsll.exe	104
PID 1952 wrote to memory of 1360	1952	csrsll.exe	104
PID 1952 wrote to memory of 1360	1952	csrsll.exe	104
PID 1952 wrote to memory of 1360	1952	csrsll.exe	104
PID 1952 wrote to memory of 1360	1952	csrsll.exe	104

C:\Users\Admin\AppData\Local\Temp\c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe
"C:\Users\Admin\AppData\Local\Temp\c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4304
- C:\Users\Admin\AppData\Local\Temp\c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe
  "C:\Users\Admin\AppData\Local\Temp\c437db03dde7f8f2715ec759948eecdef7572419b7c8c7d615475e201d72279a.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4940
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ESRDL.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1428
  - - 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
      System Location Discovery: System Language Discovery
      PID:4560
- - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1952
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:2860
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:1360

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
7474c5a636f408190ab35841e66e90d3

SHA1
0d4bcd2479e1fdc5cb1222f3abdec24167da0989

SHA256
dc7e89bafd9437180e8628d3884c4695fb721411e1ffaaec53db3893e82367c4

SHA512
e469b32c1d44f33946b97c9ff243c95dbe0ce773600f489c4965bf84be610950407d5f8c7a0989744040094133438ae0608b2411b6a6c17f7b720d6b80fd15db

Download Submit
memory/1360-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1360-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1360-44-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1360-49-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1360-61-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1360-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1952-56-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1952-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1952-39-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2860-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4304-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4304-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4304-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4304-6-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/4304-4-0x00000000022D0000-0x00000000022D2000-memory.dmp

Filesize
8KB

Download
memory/4304-3-0x00000000022C0000-0x00000000022C2000-memory.dmp

Filesize
8KB

Download
memory/4940-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4940-59-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4940-57-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/4940-38-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4940-11-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4940-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads