modiloader | fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86

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
17-12-2024 14:02

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General

Target

fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe
Size

90KB
MD5

ed19ede9461d535085a959ae82df0fa0
SHA1

2f6409d66045ab4525147c6c43400decfaa786b6
SHA256

fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86
SHA512

df262437062037d98474d440592fe6f9e2f15c77c1ec1f2e01ed252fd3354cd7ba9d7adf1a73936833679fc86e861171d35372b1c914b6c50c030c5b95e2d4b1
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDS:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3E

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/3928-52-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3928-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3928-56-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3928-63-0x0000000000400000-0x0000000000414000-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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe

Executes dropped EXE 3 IoCs

pid	Process
208	csrsll.exe
3872	csrsll.exe
3928	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-1-5-21-4050598569-1597076380-177084960-1000\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 3844 set thread context of 1344	3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	82
PID 208 set thread context of 3872	208	csrsll.exe	93
PID 208 set thread context of 3928	208	csrsll.exe	94

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3844-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3844-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1344-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1344-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3844-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1344-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000b000000023b94-29.dat	upx
behavioral2/memory/1344-39-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/208-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/208-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3928-44-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3928-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3928-52-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3928-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3928-56-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/208-58-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1344-61-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3872-62-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3928-63-0x0000000000400000-0x0000000000414000-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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe
Token: SeDebugPrivilege	3872	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe
1344	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe
208	csrsll.exe
3872	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 3844 wrote to memory of 1344	3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	82
PID 3844 wrote to memory of 1344	3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	82
PID 3844 wrote to memory of 1344	3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	82
PID 3844 wrote to memory of 1344	3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	82
PID 3844 wrote to memory of 1344	3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	82
PID 3844 wrote to memory of 1344	3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	82
PID 3844 wrote to memory of 1344	3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	82
PID 3844 wrote to memory of 1344	3844	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	82
PID 1344 wrote to memory of 4504	1344	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	83
PID 1344 wrote to memory of 4504	1344	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	83
PID 1344 wrote to memory of 4504	1344	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	83
PID 4504 wrote to memory of 4340	4504	cmd.exe	86
PID 4504 wrote to memory of 4340	4504	cmd.exe	86
PID 4504 wrote to memory of 4340	4504	cmd.exe	86
PID 1344 wrote to memory of 208	1344	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	87
PID 1344 wrote to memory of 208	1344	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	87
PID 1344 wrote to memory of 208	1344	fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe	87
PID 208 wrote to memory of 3872	208	csrsll.exe	93
PID 208 wrote to memory of 3872	208	csrsll.exe	93
PID 208 wrote to memory of 3872	208	csrsll.exe	93
PID 208 wrote to memory of 3872	208	csrsll.exe	93
PID 208 wrote to memory of 3872	208	csrsll.exe	93
PID 208 wrote to memory of 3872	208	csrsll.exe	93
PID 208 wrote to memory of 3872	208	csrsll.exe	93
PID 208 wrote to memory of 3872	208	csrsll.exe	93
PID 208 wrote to memory of 3928	208	csrsll.exe	94
PID 208 wrote to memory of 3928	208	csrsll.exe	94
PID 208 wrote to memory of 3928	208	csrsll.exe	94
PID 208 wrote to memory of 3928	208	csrsll.exe	94
PID 208 wrote to memory of 3928	208	csrsll.exe	94
PID 208 wrote to memory of 3928	208	csrsll.exe	94
PID 208 wrote to memory of 3928	208	csrsll.exe	94
PID 208 wrote to memory of 3928	208	csrsll.exe	94

C:\Users\Admin\AppData\Local\Temp\fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe
"C:\Users\Admin\AppData\Local\Temp\fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3844
- C:\Users\Admin\AppData\Local\Temp\fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe
  "C:\Users\Admin\AppData\Local\Temp\fcf41b6e247941dc5aed7a5eaa55724e6dce8da691732acb7558ed4905021a86N.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1344
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\BFKYX.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4504
  - - 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:4340
- - 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:208
  - - 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:3872
  - - 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:3928

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\BFKYX.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
4869fc2a914b5b74181eba53a42a7050

SHA1
0161fc74e96aa2cd95ca65c640c4a006cc66400b

SHA256
656d0fb05e58dd7ed919642cda02f8db56722ba081877172fea1c72b9b00fa79

SHA512
a230ac3bd299dbb4c8cc7f13e33cf4113afd1667cb39de9f1e77a8146520630751ee31738b9affde0c4a374f35fd35a49f201c7cd7f2a580fdaf3cc44562cbe3

Download Submit
memory/208-58-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/208-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/208-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1344-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1344-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1344-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1344-39-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1344-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1344-59-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/3844-3-0x0000000002B50000-0x0000000002B52000-memory.dmp

Filesize
8KB

Download
memory/3844-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3844-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3844-6-0x0000000002C80000-0x0000000002C82000-memory.dmp

Filesize
8KB

Download
memory/3844-4-0x0000000002C60000-0x0000000002C62000-memory.dmp

Filesize
8KB

Download
memory/3844-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3872-62-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3928-44-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3928-56-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3928-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3928-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3928-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3928-63-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads