modiloader | ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
22/04/2024, 02:27

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General

Target
ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe
Size 308KB
Sample240422-cxgc8aef7t
SHA256 ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193
MD5 8126da4845b543f905d79b972f48db07
SHA1 89f0d08a2eedaedbd2b99ea90a328c8f07d9b287
SHA512 461273eeca477ef644a916a5b26a2763c325cab7e3765f862939c460123adc31ecd730fca69c5b1da50a8cd5e6dbbec053d35b999e64d06cb090e00f74426cd2
SSDEEP 3072:/c3sBG7mXh7m/zZM3jAbNOM6CNtDCZFL:E3sBz0Z4Mj72F
MD5 SHA1 SHA512 SSDEEP

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

resource	yara_rule
behavioral2/memory/2040-47-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2040-49-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2040-50-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/2040-55-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

ModiLoader Second Stage 4 IoCs

resource	yara_rule
behavioral2/memory/2040-47-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2040-49-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2040-50-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2
behavioral2/memory/2040-55-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

UPX dump on OEP (original entry point) 11 IoCs

resource	yara_rule
behavioral2/memory/3204-6-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/3204-8-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/3204-9-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/2040-38-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/2040-45-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/2040-47-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/2040-49-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/2040-50-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral2/memory/3204-52-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/2776-54-0x0000000000400000-0x000000000040B000-memory.dmp	UPX
behavioral2/memory/2040-55-0x0000000000400000-0x0000000000414000-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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe

Executes dropped EXE 3 IoCs

pid	Process
4532	csrsll.exe
2776	csrsll.exe
2040	csrsll.exe

UPX packed file 11 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3204-6-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3204-8-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/3204-9-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2040-38-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2040-45-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2040-47-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2040-49-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/2040-50-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral2/memory/3204-52-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2776-54-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral2/memory/2040-55-0x0000000000400000-0x0000000000414000-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-1-5-21-2177723727-746291240-1644359950-1000\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 1604 set thread context of 3204	1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	89
PID 4532 set thread context of 2776	4532	csrsll.exe	96
PID 4532 set thread context of 2040	4532	csrsll.exe	97

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	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe
Token: SeDebugPrivilege	2776	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe
3204	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe
4532	csrsll.exe
2776	csrsll.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1604 wrote to memory of 3204	1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	89
PID 1604 wrote to memory of 3204	1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	89
PID 1604 wrote to memory of 3204	1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	89
PID 1604 wrote to memory of 3204	1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	89
PID 1604 wrote to memory of 3204	1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	89
PID 1604 wrote to memory of 3204	1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	89
PID 1604 wrote to memory of 3204	1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	89
PID 1604 wrote to memory of 3204	1604	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	89
PID 3204 wrote to memory of 4620	3204	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	91
PID 3204 wrote to memory of 4620	3204	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	91
PID 3204 wrote to memory of 4620	3204	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	91
PID 4620 wrote to memory of 2320	4620	cmd.exe	94
PID 4620 wrote to memory of 2320	4620	cmd.exe	94
PID 4620 wrote to memory of 2320	4620	cmd.exe	94
PID 3204 wrote to memory of 4532	3204	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	95
PID 3204 wrote to memory of 4532	3204	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	95
PID 3204 wrote to memory of 4532	3204	ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe	95
PID 4532 wrote to memory of 2776	4532	csrsll.exe	96
PID 4532 wrote to memory of 2776	4532	csrsll.exe	96
PID 4532 wrote to memory of 2776	4532	csrsll.exe	96
PID 4532 wrote to memory of 2776	4532	csrsll.exe	96
PID 4532 wrote to memory of 2776	4532	csrsll.exe	96
PID 4532 wrote to memory of 2776	4532	csrsll.exe	96
PID 4532 wrote to memory of 2776	4532	csrsll.exe	96
PID 4532 wrote to memory of 2776	4532	csrsll.exe	96
PID 4532 wrote to memory of 2040	4532	csrsll.exe	97
PID 4532 wrote to memory of 2040	4532	csrsll.exe	97
PID 4532 wrote to memory of 2040	4532	csrsll.exe	97
PID 4532 wrote to memory of 2040	4532	csrsll.exe	97
PID 4532 wrote to memory of 2040	4532	csrsll.exe	97
PID 4532 wrote to memory of 2040	4532	csrsll.exe	97
PID 4532 wrote to memory of 2040	4532	csrsll.exe	97
PID 4532 wrote to memory of 2040	4532	csrsll.exe	97

C:\Users\Admin\AppData\Local\Temp\ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe
"C:\Users\Admin\AppData\Local\Temp\ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1604
- C:\Users\Admin\AppData\Local\Temp\ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe
  "C:\Users\Admin\AppData\Local\Temp\ba257cd5df7d3d6ffdbc7a76cc0744cddf261f5407eb38a195081ce6391bb193.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3204
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\FERIV.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4620
  - - 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:2320
- - 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:4532
  - - 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:2776
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe"
      4⤵
      Executes dropped EXE
      PID:2040

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

FERIV.txt

Path C:\Users\Admin\AppData\Local\Temp\FERIV.txt
Size 145B
SHA256 08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff
MD5 4eb61ec7816c34ec8c125acadc57ec1b
SHA1 b0015cc865c0bb1a027be663027d3829401a31cc
SHA512 f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1
MD5 SHA1 SHA512

Submit Download

csrsll.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\csrsll.exe
Size 308KB
SHA256 7960a8a73a9ab9d99313f80bee83d18f32b079e906e13254979ff4f90db22fa8
MD5 10d5a8025982564fe99878f1f11dbb7d
SHA1 b6a81a5d41a1965369b51143ff4d766492034273
SHA512 478797f3ceced7b9ae2ffcc9225dac40fb3c0f4ee341a19ae4e03069a77d9bcf2f30db07b27bc5a3b47774d1124268fc65fab10120c417b7fc9a89ba77770699
SSDEEP 3072:/c3sBG7mXh7m/zZM3jAbNOM6CNtDCZFL:E3sBz0Z4Mj72F
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1604-3-0x00000000021D0000-0x00000000021D1000-memory.dmp

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memory/1604-4-0x00000000021E0000-0x00000000021E1000-memory.dmp

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memory/1604-5-0x00000000021F0000-0x00000000021F1000-memory.dmp

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memory/1604-0-0x0000000000400000-0x0000000000453000-memory.dmp

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memory/2040-49-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2040-45-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2040-55-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2040-50-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2040-38-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2040-47-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2776-54-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3204-9-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3204-6-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3204-52-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/3204-8-0x0000000000400000-0x000000000040B000-memory.dmp

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memory/4532-44-0x0000000002AD0000-0x0000000002AD1000-memory.dmp

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memory/4532-40-0x0000000002940000-0x0000000002941000-memory.dmp

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memory/4532-33-0x0000000000400000-0x0000000000453000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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