modiloader | f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7

Analysis

max time kernel
120s
max time network
118s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22/12/2024, 14:12

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General

Target

f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe
Size

90KB
MD5

8cf135487e3e02d672d600476ef9dee1
SHA1

5204d03dd70a9f48bc3806b8bed283b39f94ba54
SHA256

f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7
SHA512

933f9bf8ddd9362f9c83b9aa836a1a66e4a225dee5798b8baf0d2c158573d3fc4b082316358393f680701a2fe95f77a9eb7e45e9e27b6bbab942e8dde0cecb36
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDJ:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3r

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/1992-51-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1992-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1992-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/1992-61-0x0000000000400000-0x0000000000414000-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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe

Executes dropped EXE 3 IoCs

pid	Process
3444	csrsll.exe
2996	csrsll.exe
1992	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-1-5-21-3756129449-3121373848-4276368241-1000\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 3108 set thread context of 2228	3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	86
PID 3444 set thread context of 2996	3444	csrsll.exe	97
PID 3444 set thread context of 1992	3444	csrsll.exe	98

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3108-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3108-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2228-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2228-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2228-11-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3108-13-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/files/0x000b000000023b6a-28.dat	upx
behavioral2/memory/2228-38-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3444-39-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3444-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1992-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1992-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1992-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1992-55-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1992-44-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3444-57-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2228-59-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2996-60-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1992-61-0x0000000000400000-0x0000000000414000-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	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.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	csrsll.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe
Token: SeDebugPrivilege	2996	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe
2228	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe
3444	csrsll.exe
2996	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 3108 wrote to memory of 2228	3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	86
PID 3108 wrote to memory of 2228	3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	86
PID 3108 wrote to memory of 2228	3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	86
PID 3108 wrote to memory of 2228	3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	86
PID 3108 wrote to memory of 2228	3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	86
PID 3108 wrote to memory of 2228	3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	86
PID 3108 wrote to memory of 2228	3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	86
PID 3108 wrote to memory of 2228	3108	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	86
PID 2228 wrote to memory of 4600	2228	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	89
PID 2228 wrote to memory of 4600	2228	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	89
PID 2228 wrote to memory of 4600	2228	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	89
PID 4600 wrote to memory of 4952	4600	cmd.exe	92
PID 4600 wrote to memory of 4952	4600	cmd.exe	92
PID 4600 wrote to memory of 4952	4600	cmd.exe	92
PID 2228 wrote to memory of 3444	2228	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	93
PID 2228 wrote to memory of 3444	2228	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	93
PID 2228 wrote to memory of 3444	2228	f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe	93
PID 3444 wrote to memory of 2996	3444	csrsll.exe	97
PID 3444 wrote to memory of 2996	3444	csrsll.exe	97
PID 3444 wrote to memory of 2996	3444	csrsll.exe	97
PID 3444 wrote to memory of 2996	3444	csrsll.exe	97
PID 3444 wrote to memory of 2996	3444	csrsll.exe	97
PID 3444 wrote to memory of 2996	3444	csrsll.exe	97
PID 3444 wrote to memory of 2996	3444	csrsll.exe	97
PID 3444 wrote to memory of 2996	3444	csrsll.exe	97
PID 3444 wrote to memory of 1992	3444	csrsll.exe	98
PID 3444 wrote to memory of 1992	3444	csrsll.exe	98
PID 3444 wrote to memory of 1992	3444	csrsll.exe	98
PID 3444 wrote to memory of 1992	3444	csrsll.exe	98
PID 3444 wrote to memory of 1992	3444	csrsll.exe	98
PID 3444 wrote to memory of 1992	3444	csrsll.exe	98
PID 3444 wrote to memory of 1992	3444	csrsll.exe	98
PID 3444 wrote to memory of 1992	3444	csrsll.exe	98

C:\Users\Admin\AppData\Local\Temp\f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe
"C:\Users\Admin\AppData\Local\Temp\f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3108
- C:\Users\Admin\AppData\Local\Temp\f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe
  "C:\Users\Admin\AppData\Local\Temp\f81c0073a03787926fcbe9706e4eb0545f942606a19c94d3c261a756a9f16bf7.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2228
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\WAXTR.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4600
  - - 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:4952
- - 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:3444
  - - 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:2996
  - - 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:1992

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

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Downloads

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

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
52b239dd7892f9ae65ae55e271e40ea4

SHA1
dcd4edbf3e4086b73557c04fdd3de6454e9005dd

SHA256
5c1b698fd7a8eef23638c832dd285c4fc40114c0a319477d9fa680b978545088

SHA512
46d44172b8672162aee0ecfa0bad05de2b3350765677947e8433c8175455d12f8f8660fadb9b26b6c72d66588281580da758eaa98effbbbae82bb35d930d992b

Download Submit
memory/1992-61-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1992-44-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1992-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1992-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1992-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1992-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2228-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2228-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2228-11-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2228-38-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2228-59-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2228-58-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/2996-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3108-4-0x0000000002310000-0x0000000002312000-memory.dmp

Filesize
8KB

Download
memory/3108-6-0x0000000002330000-0x0000000002332000-memory.dmp

Filesize
8KB

Download
memory/3108-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3108-13-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3108-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3108-3-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/3444-57-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3444-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3444-39-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads