modiloader | 8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722

Analysis

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

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-01-2025 16:49

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General

Target

8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe
Size

90KB
MD5

e70d85a460779aa71db82794348ec730
SHA1

df19bb273bb7f9d57c3dd7658887aa90ffe72788
SHA256

8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722
SHA512

9af57feccec4e284d47a9b9d9a039a60e699656c935fc6a6f174422c51b724a6a686dc1a3c0047594fc8df2c6862a0c15befa3e1ad15f0ceb543e90d206e6048
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDa:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3w

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/4380-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4380-57-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4380-52-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4380-61-0x0000000000400000-0x0000000000414000-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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe

Executes dropped EXE 3 IoCs

pid	Process
2152	csrsll.exe
4872	csrsll.exe
4380	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-1-5-21-2045521122-590294423-3465680274-1000\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 396 set thread context of 1136	396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	86
PID 2152 set thread context of 4872	2152	csrsll.exe	105
PID 2152 set thread context of 4380	2152	csrsll.exe	106

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/396-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/396-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1136-11-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/396-15-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1136-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1136-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000300000001e762-29.dat	upx
behavioral2/memory/1136-39-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2152-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2152-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4380-45-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4380-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2152-54-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4380-55-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4380-57-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4380-52-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1136-59-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4872-60-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4380-61-0x0000000000400000-0x0000000000414000-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	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	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe
Token: SeDebugPrivilege	4872	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe
1136	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe
2152	csrsll.exe
4872	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 396 wrote to memory of 1136	396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	86
PID 396 wrote to memory of 1136	396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	86
PID 396 wrote to memory of 1136	396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	86
PID 396 wrote to memory of 1136	396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	86
PID 396 wrote to memory of 1136	396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	86
PID 396 wrote to memory of 1136	396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	86
PID 396 wrote to memory of 1136	396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	86
PID 396 wrote to memory of 1136	396	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	86
PID 1136 wrote to memory of 1288	1136	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	93
PID 1136 wrote to memory of 1288	1136	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	93
PID 1136 wrote to memory of 1288	1136	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	93
PID 1288 wrote to memory of 4864	1288	cmd.exe	97
PID 1288 wrote to memory of 4864	1288	cmd.exe	97
PID 1288 wrote to memory of 4864	1288	cmd.exe	97
PID 1136 wrote to memory of 2152	1136	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	98
PID 1136 wrote to memory of 2152	1136	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	98
PID 1136 wrote to memory of 2152	1136	8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe	98
PID 2152 wrote to memory of 4872	2152	csrsll.exe	105
PID 2152 wrote to memory of 4872	2152	csrsll.exe	105
PID 2152 wrote to memory of 4872	2152	csrsll.exe	105
PID 2152 wrote to memory of 4872	2152	csrsll.exe	105
PID 2152 wrote to memory of 4872	2152	csrsll.exe	105
PID 2152 wrote to memory of 4872	2152	csrsll.exe	105
PID 2152 wrote to memory of 4872	2152	csrsll.exe	105
PID 2152 wrote to memory of 4872	2152	csrsll.exe	105
PID 2152 wrote to memory of 4380	2152	csrsll.exe	106
PID 2152 wrote to memory of 4380	2152	csrsll.exe	106
PID 2152 wrote to memory of 4380	2152	csrsll.exe	106
PID 2152 wrote to memory of 4380	2152	csrsll.exe	106
PID 2152 wrote to memory of 4380	2152	csrsll.exe	106
PID 2152 wrote to memory of 4380	2152	csrsll.exe	106
PID 2152 wrote to memory of 4380	2152	csrsll.exe	106
PID 2152 wrote to memory of 4380	2152	csrsll.exe	106

C:\Users\Admin\AppData\Local\Temp\8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe
"C:\Users\Admin\AppData\Local\Temp\8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:396
- C:\Users\Admin\AppData\Local\Temp\8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe
  "C:\Users\Admin\AppData\Local\Temp\8b3d9726bad6a800889730419332af9f699150f11d5d79621a74c9f4d0ed0722N.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1136
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\CRREG.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1288
  - - 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:4864
- - 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:2152
  - - 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:4872
  - - 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:4380

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\CRREG.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
d994b226acccafcf23312cc10f6c5194

SHA1
966dd5ddb63644b0dda40add88c950f0bea538f7

SHA256
d1e40e7365389f866eec33d3e1c629e18c6068d852ac970c071bd86b80c078f1

SHA512
2dfeca3fd02276c7530d4a7166e19a97e086c5dc2352a97151e2ca3ad4daab3e4144d881b6a996f249c1514b8519bece91afce02abcdaf182b19d866a484974a

Download Submit
memory/396-6-0x0000000002A50000-0x0000000002A52000-memory.dmp

Filesize
8KB

Download
memory/396-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/396-15-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/396-4-0x0000000002A30000-0x0000000002A32000-memory.dmp

Filesize
8KB

Download
memory/396-3-0x0000000002A20000-0x0000000002A22000-memory.dmp

Filesize
8KB

Download
memory/396-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/1136-58-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/1136-11-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1136-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1136-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1136-39-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1136-59-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2152-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2152-54-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2152-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4380-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4380-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4380-57-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4380-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4380-45-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4380-61-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4872-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads