modiloader | a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43

Analysis

max time kernel
119s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26/09/2024, 22:37

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General

Target

a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe
Size

90KB
MD5

e4e9bb334352b2a9a918f633aef3d380
SHA1

9dbc70bc0481951993db0fbdd1212b96c73185e0
SHA256

a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43
SHA512

5ae532966ffa636a826008411e0847b736e5eba1689df0da3421e7ba8518f218e1f5d9e070e182ed7ddcfc2c2b40f1ce6ed4b3259bc7382ef823055c6ee2c503
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 Second Stage 4 IoCs

resource	yara_rule
behavioral2/memory/3828-53-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3828-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3828-54-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3828-63-0x0000000000400000-0x0000000000414000-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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe

Executes dropped EXE 3 IoCs

pid	Process
4740	csrsll.exe
1200	csrsll.exe
3828	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-1-5-21-945322488-2060912225-3527527000-1000\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 2072 set thread context of 3372	2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	87
PID 4740 set thread context of 1200	4740	csrsll.exe	95
PID 4740 set thread context of 3828	4740	csrsll.exe	96

UPX packed file 20 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2072-0-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/2072-5-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3372-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3372-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2072-11-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3372-13-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/files/0x000800000002346a-29.dat	upx
behavioral2/memory/4740-36-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3372-40-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4740-41-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4740-42-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3828-51-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3828-53-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3828-55-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3828-54-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3828-46-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/4740-58-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/3372-61-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1200-62-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3828-63-0x0000000000400000-0x0000000000414000-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	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe
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

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe
Token: SeDebugPrivilege	1200	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe
3372	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe
4740	csrsll.exe
1200	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 3372	2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	87
PID 2072 wrote to memory of 3372	2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	87
PID 2072 wrote to memory of 3372	2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	87
PID 2072 wrote to memory of 3372	2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	87
PID 2072 wrote to memory of 3372	2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	87
PID 2072 wrote to memory of 3372	2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	87
PID 2072 wrote to memory of 3372	2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	87
PID 2072 wrote to memory of 3372	2072	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	87
PID 3372 wrote to memory of 2220	3372	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	90
PID 3372 wrote to memory of 2220	3372	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	90
PID 3372 wrote to memory of 2220	3372	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	90
PID 2220 wrote to memory of 2260	2220	cmd.exe	93
PID 2220 wrote to memory of 2260	2220	cmd.exe	93
PID 2220 wrote to memory of 2260	2220	cmd.exe	93
PID 3372 wrote to memory of 4740	3372	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	94
PID 3372 wrote to memory of 4740	3372	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	94
PID 3372 wrote to memory of 4740	3372	a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe	94
PID 4740 wrote to memory of 1200	4740	csrsll.exe	95
PID 4740 wrote to memory of 1200	4740	csrsll.exe	95
PID 4740 wrote to memory of 1200	4740	csrsll.exe	95
PID 4740 wrote to memory of 1200	4740	csrsll.exe	95
PID 4740 wrote to memory of 1200	4740	csrsll.exe	95
PID 4740 wrote to memory of 1200	4740	csrsll.exe	95
PID 4740 wrote to memory of 1200	4740	csrsll.exe	95
PID 4740 wrote to memory of 1200	4740	csrsll.exe	95
PID 4740 wrote to memory of 3828	4740	csrsll.exe	96
PID 4740 wrote to memory of 3828	4740	csrsll.exe	96
PID 4740 wrote to memory of 3828	4740	csrsll.exe	96
PID 4740 wrote to memory of 3828	4740	csrsll.exe	96
PID 4740 wrote to memory of 3828	4740	csrsll.exe	96
PID 4740 wrote to memory of 3828	4740	csrsll.exe	96
PID 4740 wrote to memory of 3828	4740	csrsll.exe	96
PID 4740 wrote to memory of 3828	4740	csrsll.exe	96

C:\Users\Admin\AppData\Local\Temp\a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe
"C:\Users\Admin\AppData\Local\Temp\a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Users\Admin\AppData\Local\Temp\a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe
  "C:\Users\Admin\AppData\Local\Temp\a8c597dd63151c7cf6b86ca7aaf7796e64386929ceba1aa2fee2866ee3ef7b43N.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3372
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\AVWKW.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2220
  - - 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:2260
- - 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:4740
  - - 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:1200
  - - 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:3828

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\AVWKW.txt

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
90KB

MD5
197ca0328241d1291576fad8ccd9a20e

SHA1
e882a14096d2a397f5aa55e01cca7a2e129d2a5e

SHA256
fe6c9a923766f280b8ed9d50cadb0938b8964a138f9f159a06381225697d402f

SHA512
8fa4bf039b0174d724b322c89bcdf3bae04c0a74045df007225e6cdc12f6e49b50b469114bc6c4342b14910e9a63f8a8eb75c512a97fa7e864f5b4729735d94a

Download Submit
memory/1200-62-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2072-3-0x0000000002310000-0x0000000002312000-memory.dmp

Filesize
8KB

Download
memory/2072-4-0x0000000002320000-0x0000000002322000-memory.dmp

Filesize
8KB

Download
memory/2072-5-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2072-6-0x0000000002340000-0x0000000002342000-memory.dmp

Filesize
8KB

Download
memory/2072-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2072-11-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3372-40-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3372-13-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3372-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3372-9-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3372-61-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3372-59-0x0000000000410000-0x00000000004D9000-memory.dmp

Filesize
804KB

Download
memory/3828-46-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3828-53-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3828-55-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3828-54-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3828-51-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3828-63-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4740-58-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4740-42-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4740-41-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4740-36-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads