modiloader | f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367

Analysis

max time kernel
119s
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
15-12-2024 21:37

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General

Target

f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe
Size

90KB
MD5

1bce29dea3eb978519f982206623ee70
SHA1

6deea386e20906636c6d3b3267f209a2e6c719b0
SHA256

f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367
SHA512

803ad4d310dbe44d03f7bdc73c518f69e072ece6af7ca7ad2d4115977d0cce0d9357d8d1c99ec271d34bdd0dc43d51bb0839cf8b22add6dbe6ca1b7a2dc2ec39
SSDEEP

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

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/3744-52-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3744-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3744-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3744-63-0x0000000000400000-0x0000000000414000-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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe

Executes dropped EXE 3 IoCs

pid	Process
2404	csrsll.exe
1228	csrsll.exe
3744	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-1-5-21-4089630652-1596403869-279772308-1000\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 4448 set thread context of 4604	4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	82
PID 2404 set thread context of 1228	2404	csrsll.exe	88
PID 2404 set thread context of 3744	2404	csrsll.exe	89

UPX packed file 20 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4448-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4448-4-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4604-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4604-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4604-11-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4448-14-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/files/0x0032000000023b75-29.dat	upx
behavioral2/memory/2404-37-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4604-40-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2404-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2404-43-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3744-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3744-52-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2404-58-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4604-61-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3744-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3744-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3744-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1228-62-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3744-63-0x0000000000400000-0x0000000000414000-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	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	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe
Token: SeDebugPrivilege	1228	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe
4604	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe
2404	csrsll.exe
1228	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 4448 wrote to memory of 4604	4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	82
PID 4448 wrote to memory of 4604	4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	82
PID 4448 wrote to memory of 4604	4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	82
PID 4448 wrote to memory of 4604	4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	82
PID 4448 wrote to memory of 4604	4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	82
PID 4448 wrote to memory of 4604	4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	82
PID 4448 wrote to memory of 4604	4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	82
PID 4448 wrote to memory of 4604	4448	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	82
PID 4604 wrote to memory of 3108	4604	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	83
PID 4604 wrote to memory of 3108	4604	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	83
PID 4604 wrote to memory of 3108	4604	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	83
PID 3108 wrote to memory of 3432	3108	cmd.exe	86
PID 3108 wrote to memory of 3432	3108	cmd.exe	86
PID 3108 wrote to memory of 3432	3108	cmd.exe	86
PID 4604 wrote to memory of 2404	4604	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	87
PID 4604 wrote to memory of 2404	4604	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	87
PID 4604 wrote to memory of 2404	4604	f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe	87
PID 2404 wrote to memory of 1228	2404	csrsll.exe	88
PID 2404 wrote to memory of 1228	2404	csrsll.exe	88
PID 2404 wrote to memory of 1228	2404	csrsll.exe	88
PID 2404 wrote to memory of 1228	2404	csrsll.exe	88
PID 2404 wrote to memory of 1228	2404	csrsll.exe	88
PID 2404 wrote to memory of 1228	2404	csrsll.exe	88
PID 2404 wrote to memory of 1228	2404	csrsll.exe	88
PID 2404 wrote to memory of 1228	2404	csrsll.exe	88
PID 2404 wrote to memory of 3744	2404	csrsll.exe	89
PID 2404 wrote to memory of 3744	2404	csrsll.exe	89
PID 2404 wrote to memory of 3744	2404	csrsll.exe	89
PID 2404 wrote to memory of 3744	2404	csrsll.exe	89
PID 2404 wrote to memory of 3744	2404	csrsll.exe	89
PID 2404 wrote to memory of 3744	2404	csrsll.exe	89
PID 2404 wrote to memory of 3744	2404	csrsll.exe	89
PID 2404 wrote to memory of 3744	2404	csrsll.exe	89

C:\Users\Admin\AppData\Local\Temp\f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe
"C:\Users\Admin\AppData\Local\Temp\f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4448
- C:\Users\Admin\AppData\Local\Temp\f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe
  "C:\Users\Admin\AppData\Local\Temp\f859a81f87ac4265d3afc7fa84079086d5425c0acd52cc7932391081900c6367N.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4604
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ANTKS.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3108
  - - 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:3432
- - 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:2404
  - - 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:1228
  - - 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:3744

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\ANTKS.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
72aeed6947ee68f50840ef14a22b2a71

SHA1
c1a20b54afea25eaad5abe09cb9a5570cd79965f

SHA256
20b55fe90479d155ff2fa773562501961736b07c9e748f81d45bc703eb63921d

SHA512
4142661a7b131d8622481dff3ac16ba2c8e7e66e59f873a845449c49da88971fe7991e3f9fd7e08246c60240125fd9c4b2c26fc51b3c430fa583829b39ccbee0

Download Submit
memory/1228-62-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2404-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2404-58-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2404-37-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2404-43-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3744-52-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3744-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3744-63-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3744-47-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3744-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3744-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4448-14-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4448-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4448-5-0x0000000002320000-0x0000000002322000-memory.dmp

Filesize
8KB

Download
memory/4448-6-0x0000000002330000-0x0000000002332000-memory.dmp

Filesize
8KB

Download
memory/4448-4-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4448-3-0x0000000002300000-0x0000000002302000-memory.dmp

Filesize
8KB

Download
memory/4604-40-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4604-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4604-11-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4604-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/4604-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads