modiloader | 8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152

General

Target

8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
Size

308KB
MD5

2129141bac805bb2dcfc831eef559a15
SHA1

60946924e66c5a08ff8dcc811c4bf715a71aa598
SHA256

8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152
SHA512

4c1b9a8866480b180f3016ebb0036c75a311e6fbb7452462aa161d7e64b065135240644e0c91fa679bb2182783af8e728565ca4686bb567070aa055df2026869
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 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/143536-147849-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

ModiLoader Second Stage 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/143536-147849-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

UPX dump on OEP (original entry point) 9 IoCs

Processes:

resource	yara_rule
behavioral1/memory/237352-73920-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral1/memory/237352-73923-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral1/memory/237352-73924-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral1/memory/237352-73925-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral1/memory/237352-147837-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral1/memory/143536-147833-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/memory/237352-113168-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral1/memory/143460-147848-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral1/memory/143536-147849-0x0000000000400000-0x0000000000414000-memory.dmp	UPX

Executes dropped EXE 3 IoCs

Processes:

csrsll.execsrsll.execsrsll.exe

pid process

57212 csrsll.exe
143460 csrsll.exe
143536 csrsll.exe

pid	process
57212	csrsll.exe
143460	csrsll.exe
143536	csrsll.exe

Loads dropped DLL 5 IoCs

Processes:

8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe

pid	process
237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe

UPX packed file 10 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/237352-73918-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/237352-73920-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/237352-73923-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/237352-73924-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/237352-73925-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/237352-147837-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/143536-147833-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/237352-113168-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/143460-147848-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/143536-147849-0x0000000000400000-0x0000000000414000-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-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.execsrsll.exe

description	pid	process	target process
PID 2124 set thread context of 237352	2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
PID 57212 set thread context of 143460	57212	csrsll.exe	csrsll.exe
PID 57212 set thread context of 143536	57212	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	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe
Token: SeDebugPrivilege	143460	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.execsrsll.execsrsll.exe

pid	process
2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
57212	csrsll.exe
143460	csrsll.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.execmd.execsrsll.exe

description	pid	process	target process
PID 2124 wrote to memory of 237352	2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
PID 2124 wrote to memory of 237352	2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
PID 2124 wrote to memory of 237352	2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
PID 2124 wrote to memory of 237352	2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
PID 2124 wrote to memory of 237352	2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
PID 2124 wrote to memory of 237352	2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
PID 2124 wrote to memory of 237352	2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
PID 2124 wrote to memory of 237352	2124	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
PID 237352 wrote to memory of 237492	237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	cmd.exe
PID 237352 wrote to memory of 237492	237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	cmd.exe
PID 237352 wrote to memory of 237492	237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	cmd.exe
PID 237352 wrote to memory of 237492	237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	cmd.exe
PID 237492 wrote to memory of 237544	237492	cmd.exe	reg.exe
PID 237492 wrote to memory of 237544	237492	cmd.exe	reg.exe
PID 237492 wrote to memory of 237544	237492	cmd.exe	reg.exe
PID 237492 wrote to memory of 237544	237492	cmd.exe	reg.exe
PID 237352 wrote to memory of 57212	237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	csrsll.exe
PID 237352 wrote to memory of 57212	237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	csrsll.exe
PID 237352 wrote to memory of 57212	237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	csrsll.exe
PID 237352 wrote to memory of 57212	237352	8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe	csrsll.exe
PID 57212 wrote to memory of 143460	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143460	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143460	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143460	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143460	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143460	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143460	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143460	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143536	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143536	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143536	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143536	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143536	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143536	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143536	57212	csrsll.exe	csrsll.exe
PID 57212 wrote to memory of 143536	57212	csrsll.exe	csrsll.exe

C:\Users\Admin\AppData\Local\Temp\8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
"C:\Users\Admin\AppData\Local\Temp\8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2124

C:\Users\Admin\AppData\Local\Temp\8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe
"C:\Users\Admin\AppData\Local\Temp\8b4a90889545e9aa061d322f8a571eeb4261d1e556456568c004ece73359d152.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:237352

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\NJKVS.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:237492

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:237544

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:57212

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:143460

C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
4⤵
- Executes dropped EXE
PID:143536

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\NJKVS.bat
Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

MD5
aac99e1a66b59edca61c54f91990714b

SHA1
ab698ec809cf46b4b39d7712288629d0fa6f6955

SHA256
5e104dbd53769882465736826b724173ac1f436709864eee3adce6c7494cf9be

SHA512
de6e6107480885df134508f43c23e3119bcba07bf9c3fea7b955bb4bfd6ac3101d5d498bff1ff0941e5a8beaeb3af1133c6c62bd2ddf9af54d94b50649c7cba9

Download Submit
memory/2124-0-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/2124-3-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/57212-73965-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/143460-147848-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/143536-147849-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/143536-147833-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/237352-73925-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/237352-73924-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/237352-73923-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/237352-73922-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/237352-147837-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/237352-73920-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/237352-113168-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/237352-73918-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/237352-73916-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads