modiloader | bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870

Analysis

max time kernel
118s
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 08:20

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General

Target

bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe
Size

90KB
MD5

bb739cca9980e660e6cc4eb1e0431840
SHA1

6cfc2e1325209d0914207bf1504e00a3f2eb1f77
SHA256

bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870
SHA512

7dd59757902202273bcfc91638d6f6d3532baaab82993e714b934295fe4604b8312214e3dd58ae1686a1b5c0804fbdf7f7cfe90c440c23ad1b45af0a02970f08
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oD8:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3+

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/4004-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4004-56-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4004-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4004-62-0x0000000000400000-0x0000000000414000-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	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe

Executes dropped EXE 3 IoCs

pid	Process
3980	csrsll.exe
3620	csrsll.exe
4004	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 4872 set thread context of 4696	4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	83
PID 3980 set thread context of 3620	3980	csrsll.exe	96
PID 3980 set thread context of 4004	3980	csrsll.exe	97

UPX packed file 19 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4872-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4872-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4696-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4696-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4696-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4872-12-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/files/0x0008000000023cb2-29.dat	upx
behavioral2/memory/4696-39-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3980-40-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3980-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4004-45-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4004-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4004-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3980-57-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4004-56-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4004-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4696-60-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3620-61-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4004-62-0x0000000000400000-0x0000000000414000-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	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe
Token: SeDebugPrivilege	3620	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe
4696	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe
3980	csrsll.exe
3620	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4872 wrote to memory of 4696	4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	83
PID 4872 wrote to memory of 4696	4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	83
PID 4872 wrote to memory of 4696	4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	83
PID 4872 wrote to memory of 4696	4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	83
PID 4872 wrote to memory of 4696	4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	83
PID 4872 wrote to memory of 4696	4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	83
PID 4872 wrote to memory of 4696	4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	83
PID 4872 wrote to memory of 4696	4872	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	83
PID 4696 wrote to memory of 2484	4696	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	84
PID 4696 wrote to memory of 2484	4696	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	84
PID 4696 wrote to memory of 2484	4696	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	84
PID 2484 wrote to memory of 2976	2484	cmd.exe	88
PID 2484 wrote to memory of 2976	2484	cmd.exe	88
PID 2484 wrote to memory of 2976	2484	cmd.exe	88
PID 4696 wrote to memory of 3980	4696	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	89
PID 4696 wrote to memory of 3980	4696	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	89
PID 4696 wrote to memory of 3980	4696	bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe	89
PID 3980 wrote to memory of 3620	3980	csrsll.exe	96
PID 3980 wrote to memory of 3620	3980	csrsll.exe	96
PID 3980 wrote to memory of 3620	3980	csrsll.exe	96
PID 3980 wrote to memory of 3620	3980	csrsll.exe	96
PID 3980 wrote to memory of 3620	3980	csrsll.exe	96
PID 3980 wrote to memory of 3620	3980	csrsll.exe	96
PID 3980 wrote to memory of 3620	3980	csrsll.exe	96
PID 3980 wrote to memory of 3620	3980	csrsll.exe	96
PID 3980 wrote to memory of 4004	3980	csrsll.exe	97
PID 3980 wrote to memory of 4004	3980	csrsll.exe	97
PID 3980 wrote to memory of 4004	3980	csrsll.exe	97
PID 3980 wrote to memory of 4004	3980	csrsll.exe	97
PID 3980 wrote to memory of 4004	3980	csrsll.exe	97
PID 3980 wrote to memory of 4004	3980	csrsll.exe	97
PID 3980 wrote to memory of 4004	3980	csrsll.exe	97
PID 3980 wrote to memory of 4004	3980	csrsll.exe	97

C:\Users\Admin\AppData\Local\Temp\bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe
"C:\Users\Admin\AppData\Local\Temp\bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4872
- C:\Users\Admin\AppData\Local\Temp\bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe
  "C:\Users\Admin\AppData\Local\Temp\bc1fcab010809d4b488ef87f750c45c48a4c4b6bf953523d93ebb73a35946870N.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4696
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\SAFDR.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2484
  - - 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:2976
- - 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:3980
  - - 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:3620
  - - 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:4004

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\SAFDR.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
6759ec22dbadcda240aa763f37f3eb84

SHA1
905a20785cb4b7df977abe0459fd417ef84bbf01

SHA256
8a0b194537ac5975bf3a9e7c7a4ec03302c851514f2419cebd804e04acebb851

SHA512
f86f5d9b3fab3ea0d0b85e8f883356d4e75aabacdaf629f3984ff74d2e6e958e2be666229e6f33558b5492d64aa046dd96db4e76b0b536d8cd8a75b4ce1774cf

Download Submit
memory/3620-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3980-57-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3980-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3980-40-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4004-50-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4004-45-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4004-62-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4004-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4004-56-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4004-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4696-39-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4696-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4696-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4696-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4696-60-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4872-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4872-6-0x0000000002A80000-0x0000000002A82000-memory.dmp

Filesize
8KB

Download
memory/4872-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4872-4-0x0000000002A50000-0x0000000002A52000-memory.dmp

Filesize
8KB

Download
memory/4872-3-0x0000000002A40000-0x0000000002A42000-memory.dmp

Filesize
8KB

Download
memory/4872-12-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads