modiloader | 3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c

Analysis

max time kernel
151s
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
28-06-2024 20:33

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General

Target

3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
Size

308KB
MD5

4d3655038f4d70303d0c389daea90a1c
SHA1

b2de436860db40c2d2e47843c8c7ac0c30fdef68
SHA256

3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c
SHA512

2390602d01d55ed4adbf5d0a935ebb975221b4ae84994ad5f3b5b2dbf6dcc831bf0da24c5f1ab8c3f20a0acb2f2ec3559d609c98e34fb518615d21f80fa604fb
SSDEEP

3072:/c3sBG7mXh7m/zZM3jAbNOM6CNtDCZFL:E3sBz0Z4Mj72F

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 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3496-46-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3496-49-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3496-47-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3496-56-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

ModiLoader Second Stage 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3496-46-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3496-49-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3496-47-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/3496-56-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

UPX dump on OEP (original entry point) 11 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1264-5-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/1264-7-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/1264-8-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/3496-39-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/3496-44-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/3496-46-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/3496-49-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/3496-47-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/1264-54-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/4708-55-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/3496-56-0x0000000000400000-0x0000000000414000-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

Processes:

3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe

Executes dropped EXE 3 IoCs

Processes:

csrsll.execsrsll.execsrsll.exe

pid process

2440 csrsll.exe
4708 csrsll.exe
3496 csrsll.exe

pid	process
2440	csrsll.exe
4708	csrsll.exe
3496	csrsll.exe

UPX packed file 11 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1264-5-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1264-7-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/1264-8-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3496-39-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3496-44-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3496-46-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3496-49-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3496-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/1264-54-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/4708-55-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3496-56-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.execsrsll.exe

description	pid	process	target process
PID 2388 set thread context of 1264	2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
PID 2440 set thread context of 4708	2440	csrsll.exe	csrsll.exe
PID 2440 set thread context of 3496	2440	csrsll.exe	csrsll.exe

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

Processes:

csrsll.exe

description	pid	process
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe
Token: SeDebugPrivilege	4708	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.execsrsll.execsrsll.exe

pid process

2388 3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
1264 3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
2440 csrsll.exe
4708 csrsll.exe

pid	process
2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
1264	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
2440	csrsll.exe
4708	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.execmd.execsrsll.exe

description	pid	process	target process
PID 2388 wrote to memory of 1264	2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
PID 2388 wrote to memory of 1264	2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
PID 2388 wrote to memory of 1264	2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
PID 2388 wrote to memory of 1264	2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
PID 2388 wrote to memory of 1264	2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
PID 2388 wrote to memory of 1264	2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
PID 2388 wrote to memory of 1264	2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
PID 2388 wrote to memory of 1264	2388	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
PID 1264 wrote to memory of 1692	1264	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	cmd.exe
PID 1264 wrote to memory of 1692	1264	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	cmd.exe
PID 1264 wrote to memory of 1692	1264	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	cmd.exe
PID 1692 wrote to memory of 4088	1692	cmd.exe	reg.exe
PID 1692 wrote to memory of 4088	1692	cmd.exe	reg.exe
PID 1692 wrote to memory of 4088	1692	cmd.exe	reg.exe
PID 1264 wrote to memory of 2440	1264	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	csrsll.exe
PID 1264 wrote to memory of 2440	1264	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	csrsll.exe
PID 1264 wrote to memory of 2440	1264	3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe	csrsll.exe
PID 2440 wrote to memory of 4708	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 4708	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 4708	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 4708	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 4708	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 4708	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 4708	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 4708	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 3496	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 3496	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 3496	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 3496	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 3496	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 3496	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 3496	2440	csrsll.exe	csrsll.exe
PID 2440 wrote to memory of 3496	2440	csrsll.exe	csrsll.exe

C:\Users\Admin\AppData\Local\Temp\3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
"C:\Users\Admin\AppData\Local\Temp\3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2388

C:\Users\Admin\AppData\Local\Temp\3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe
"C:\Users\Admin\AppData\Local\Temp\3a59835da7aba7f406b645de60c73f716918efee16daecad05dd218bf37afa9c.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1264

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\YMYJI.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:1692

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:4088

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:2440

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:4708

C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
4⤵
- Executes dropped EXE
PID:3496

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3732 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
1⤵
PID:4396

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\YMYJI.txt
Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
Filesize
308KB

MD5
edfaf78761fc80949e638c971ff58a31

SHA1
7d9d1241b3cbac9462d8b1cd8a45333a6ea5032e

SHA256
b9f9d99a0ac8c2d77d8ff4c1016334cfb4b2fdd1c79fda54c4a4ce0291caa2a2

SHA512
2414ccb5bfef3e5cc6645d19e7db27f0cd9534ffd6ac98bc4e67996ac20258e22be861804586c2b4f00850944e8ee2ae2397c65f4225d8ae71cd56f2d625ab97

Download Submit
memory/1264-5-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1264-7-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1264-8-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/1264-54-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/2388-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2388-3-0x0000000002B70000-0x0000000002B71000-memory.dmp

Filesize
4KB

Download
memory/2388-4-0x0000000002B90000-0x0000000002B91000-memory.dmp

Filesize
4KB

Download
memory/2440-36-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2440-35-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2440-51-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2440-32-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/3496-39-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3496-44-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3496-46-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3496-49-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3496-47-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3496-56-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4708-55-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download