modiloader | ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
19/03/2024, 09:40

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General

Target

ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe
Size

90KB
MD5

5a489cc18c38d98a4360cce80bec2bfa
SHA1

2dfc982549e2584e48d95af53a43b6035b255e5a
SHA256

ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d
SHA512

2bd28b20fa8a5fbd09ae89c10b5237803922d10c809fc01cd502329cb24f1aec821034577e625a04cb8ae9483608f25856ebe9edfae2918cbc726e09a8c9d391
SSDEEP

1536:UiYwjQt6QJvzZsgDIWzm/xsXfv+hYhyQQyV5uv4JBrB7w5VRGulTG1ZCL8nj1oDK:0wjZQJvzZsgsW6/Afv+hYfQIm4/rdE3Y

Score

10^/10

modiloader persistence trojan upx

Malware Config

Signatures

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

Detects Windows executables referencing non-Windows User-Agents 3 IoCs

resource	yara_rule
behavioral2/memory/4376-55-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/4376-57-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/4376-60-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

ModiLoader Second Stage 3 IoCs

resource	yara_rule
behavioral2/memory/4376-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4376-57-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/4376-60-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

UPX dump on OEP (original entry point) 16 IoCs

resource	yara_rule
behavioral2/memory/4656-0-0x0000000000400000-0x0000000000453000-memory.dmp	UPX
behavioral2/memory/556-7-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/556-9-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/556-11-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/4656-10-0x0000000000400000-0x0000000000453000-memory.dmp	UPX
behavioral2/files/0x000800000002320a-27.dat	UPX
behavioral2/memory/4452-34-0x0000000000400000-0x0000000000453000-memory.dmp	UPX
behavioral2/memory/556-38-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/4376-47-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/4376-53-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/4452-54-0x0000000000400000-0x0000000000453000-memory.dmp	UPX
behavioral2/memory/4376-55-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/4376-57-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/556-58-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/1968-59-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/4376-60-0x0000000000400000-0x0000000000414000-memory.dmp	UPX

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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe

Executes dropped EXE 3 IoCs

pid	Process
4452	csrsll.exe
1968	csrsll.exe
4376	csrsll.exe

UPX packed file 17 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4656-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/556-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/556-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/556-11-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4656-10-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/files/0x000800000002320a-27.dat	upx
behavioral2/memory/4452-34-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/556-38-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4452-42-0x0000000002A50000-0x0000000002A52000-memory.dmp	upx
behavioral2/memory/4376-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4376-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4452-54-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4376-55-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4376-57-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/556-58-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1968-59-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4376-60-0x0000000000400000-0x0000000000414000-memory.dmp	upx

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-1-5-21-513485977-2495024337-1260977654-1000\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 4656 set thread context of 556	4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	95
PID 4452 set thread context of 1968	4452	csrsll.exe	103
PID 4452 set thread context of 4376	4452	csrsll.exe	104

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe
Token: SeDebugPrivilege	1968	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe
556	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe
4452	csrsll.exe
1968	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4656 wrote to memory of 556	4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	95
PID 4656 wrote to memory of 556	4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	95
PID 4656 wrote to memory of 556	4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	95
PID 4656 wrote to memory of 556	4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	95
PID 4656 wrote to memory of 556	4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	95
PID 4656 wrote to memory of 556	4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	95
PID 4656 wrote to memory of 556	4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	95
PID 4656 wrote to memory of 556	4656	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	95
PID 556 wrote to memory of 5020	556	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	98
PID 556 wrote to memory of 5020	556	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	98
PID 556 wrote to memory of 5020	556	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	98
PID 5020 wrote to memory of 3852	5020	cmd.exe	101
PID 5020 wrote to memory of 3852	5020	cmd.exe	101
PID 5020 wrote to memory of 3852	5020	cmd.exe	101
PID 556 wrote to memory of 4452	556	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	102
PID 556 wrote to memory of 4452	556	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	102
PID 556 wrote to memory of 4452	556	ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe	102
PID 4452 wrote to memory of 1968	4452	csrsll.exe	103
PID 4452 wrote to memory of 1968	4452	csrsll.exe	103
PID 4452 wrote to memory of 1968	4452	csrsll.exe	103
PID 4452 wrote to memory of 1968	4452	csrsll.exe	103
PID 4452 wrote to memory of 1968	4452	csrsll.exe	103
PID 4452 wrote to memory of 1968	4452	csrsll.exe	103
PID 4452 wrote to memory of 1968	4452	csrsll.exe	103
PID 4452 wrote to memory of 1968	4452	csrsll.exe	103
PID 4452 wrote to memory of 4376	4452	csrsll.exe	104
PID 4452 wrote to memory of 4376	4452	csrsll.exe	104
PID 4452 wrote to memory of 4376	4452	csrsll.exe	104
PID 4452 wrote to memory of 4376	4452	csrsll.exe	104
PID 4452 wrote to memory of 4376	4452	csrsll.exe	104
PID 4452 wrote to memory of 4376	4452	csrsll.exe	104
PID 4452 wrote to memory of 4376	4452	csrsll.exe	104
PID 4452 wrote to memory of 4376	4452	csrsll.exe	104

C:\Users\Admin\AppData\Local\Temp\ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe
"C:\Users\Admin\AppData\Local\Temp\ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4656
- C:\Users\Admin\AppData\Local\Temp\ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe
  "C:\Users\Admin\AppData\Local\Temp\ca8a774cbeb6d16bd13ed22a9eb619cea79bf4f58da3090016e23d8f4968f71d.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:556
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\PFBXW.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5020
  - - 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
      PID:3852
- - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4452
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:1968
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      PID:4376

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
547cd444061378151bb844c8de2fb9ca

SHA1
e6b8a43dafee1ba705de6e43780f342c9f6256db

SHA256
7ea7fe88309826dc8322d80b557034dc391f7d65976aaba23847f6d8a8c1706a

SHA512
f56e362e0c39b7ef613b5c34a4985d3617730da59130c64ed5211cb9d031134545b132c466727dce6b5a2bce905f2a1cb23d7ee4793f870abb5092a918d76144

Download Submit
memory/556-38-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/556-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/556-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/556-11-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/556-58-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/556-56-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/1968-59-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4376-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4376-60-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4376-57-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4376-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4376-47-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4452-40-0x00000000021F0000-0x00000000021F2000-memory.dmp

Filesize
8KB

Download
memory/4452-42-0x0000000002A50000-0x0000000002A52000-memory.dmp

Filesize
8KB

Download
memory/4452-45-0x0000000002AD0000-0x0000000002AD2000-memory.dmp

Filesize
8KB

Download
memory/4452-54-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4452-34-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4452-39-0x00000000021D0000-0x00000000021D2000-memory.dmp

Filesize
8KB

Download
memory/4656-10-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4656-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4656-5-0x0000000002340000-0x0000000002342000-memory.dmp

Filesize
8KB

Download
memory/4656-3-0x0000000002310000-0x0000000002312000-memory.dmp

Filesize
8KB

Download
memory/4656-4-0x0000000002330000-0x0000000002332000-memory.dmp

Filesize
8KB

Download
memory/4656-6-0x0000000002320000-0x0000000002322000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads