modiloader | 8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
01-11-2024 14:32

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General

Target

8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
Size

338KB
MD5

a6bdcd6f1b10c86b88f8be60b25f29b1
SHA1

ab2840ed40b083ccf1e4045e93d3095530239587
SHA256

8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8
SHA512

31f3d3bc5cd507f4e5c04db5bf23b2f8f1e67905e5d9a0be929e0617b01c47a5bdefc50f89adc1e8bd0988dbd8dc1c6910e5d58be47c8375124d18f412701f2b
SSDEEP

3072:bc3sBG7mXh7m/zZM3jAbNOM6CNtDCZFc/:w3sBz0Z4Mj72F

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 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3260-147854-0x0000000000400000-0x0000000000414000-memory.dmp	modiloader_stage2

Executes dropped EXE 3 IoCs

Processes:

csrsll.execsrsll.execsrsll.exe

pid	Process
33160	csrsll.exe
3200	csrsll.exe
3260	csrsll.exe

Loads dropped DLL 5 IoCs

Processes:

8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe

pid	Process
32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe

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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\Win Pdf = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrsll.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.execsrsll.exe

description	pid	Process	procid_target
PID 2088 set thread context of 32904	2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	30
PID 33160 set thread context of 3200	33160	csrsll.exe	36
PID 33160 set thread context of 3260	33160	csrsll.exe	37

UPX packed file 16 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2088-0-0x0000000000400000-0x0000000000457000-memory.dmp	upx
behavioral1/memory/32904-73928-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/32904-73927-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/2088-73926-0x0000000000400000-0x0000000000457000-memory.dmp	upx
behavioral1/memory/32904-73925-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/32904-73920-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/32904-73918-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/files/0x0009000000019450-73953.dat	upx
behavioral1/memory/32904-73955-0x00000000032A0000-0x00000000032F7000-memory.dmp	upx
behavioral1/memory/33160-73974-0x0000000000400000-0x0000000000457000-memory.dmp	upx
behavioral1/memory/32904-147846-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/33160-147842-0x0000000000400000-0x0000000000457000-memory.dmp	upx
behavioral1/memory/3260-147841-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/32904-147840-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/3200-147853-0x0000000000400000-0x000000000040B000-memory.dmp	upx
behavioral1/memory/3260-147854-0x0000000000400000-0x0000000000414000-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

Processes:

csrsll.exe8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.execmd.exereg.execsrsll.execsrsll.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrsll.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

csrsll.exe

description	pid	Process
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe
Token: SeDebugPrivilege	3200	csrsll.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.execsrsll.execsrsll.exe

pid	Process
2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
33160	csrsll.exe
3200	csrsll.exe

Suspicious use of WriteProcessMemory 36 IoCs

Processes:

8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.execmd.execsrsll.exe

description	pid	Process	procid_target
PID 2088 wrote to memory of 32904	2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	30
PID 2088 wrote to memory of 32904	2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	30
PID 2088 wrote to memory of 32904	2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	30
PID 2088 wrote to memory of 32904	2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	30
PID 2088 wrote to memory of 32904	2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	30
PID 2088 wrote to memory of 32904	2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	30
PID 2088 wrote to memory of 32904	2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	30
PID 2088 wrote to memory of 32904	2088	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	30
PID 32904 wrote to memory of 33084	32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	32
PID 32904 wrote to memory of 33084	32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	32
PID 32904 wrote to memory of 33084	32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	32
PID 32904 wrote to memory of 33084	32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	32
PID 33084 wrote to memory of 33136	33084	cmd.exe	34
PID 33084 wrote to memory of 33136	33084	cmd.exe	34
PID 33084 wrote to memory of 33136	33084	cmd.exe	34
PID 33084 wrote to memory of 33136	33084	cmd.exe	34
PID 32904 wrote to memory of 33160	32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	35
PID 32904 wrote to memory of 33160	32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	35
PID 32904 wrote to memory of 33160	32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	35
PID 32904 wrote to memory of 33160	32904	8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe	35
PID 33160 wrote to memory of 3200	33160	csrsll.exe	36
PID 33160 wrote to memory of 3200	33160	csrsll.exe	36
PID 33160 wrote to memory of 3200	33160	csrsll.exe	36
PID 33160 wrote to memory of 3200	33160	csrsll.exe	36
PID 33160 wrote to memory of 3200	33160	csrsll.exe	36
PID 33160 wrote to memory of 3200	33160	csrsll.exe	36
PID 33160 wrote to memory of 3200	33160	csrsll.exe	36
PID 33160 wrote to memory of 3200	33160	csrsll.exe	36
PID 33160 wrote to memory of 3260	33160	csrsll.exe	37
PID 33160 wrote to memory of 3260	33160	csrsll.exe	37
PID 33160 wrote to memory of 3260	33160	csrsll.exe	37
PID 33160 wrote to memory of 3260	33160	csrsll.exe	37
PID 33160 wrote to memory of 3260	33160	csrsll.exe	37
PID 33160 wrote to memory of 3260	33160	csrsll.exe	37
PID 33160 wrote to memory of 3260	33160	csrsll.exe	37
PID 33160 wrote to memory of 3260	33160	csrsll.exe	37

C:\Users\Admin\AppData\Local\Temp\8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
"C:\Users\Admin\AppData\Local\Temp\8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Users\Admin\AppData\Local\Temp\8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe
  "C:\Users\Admin\AppData\Local\Temp\8f5936f3ebe5598bea2c561c4dc118eeb836ad393ec11e4ccfd9fde43a461cd8.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:32904
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\EFABW.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:33084
  - - 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:33136
- - 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:33160
  - - 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:3200
  - - 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:3260

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

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\EFABW.bat

Filesize
145B

MD5
4eb61ec7816c34ec8c125acadc57ec1b

SHA1
b0015cc865c0bb1a027be663027d3829401a31cc

SHA256
08375cdb2e9819391f67f71e9718c15b48d3eaa452c54bd8fdd1f6a42e899aff

SHA512
f289f01d996dd643560370be8cdf8894e9a676ca3813f706c01ef5d705b9b18246c6cadf10d96edd433a616637b8a78fbd23c5738e76f1c4e671977b6d0cb6c1

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

Filesize
338KB

MD5
ba3d80150e18d6e1c7dd173bf7dc9ac2

SHA1
cc82fb6930feb458eff54a0df7f4e6e202312a20

SHA256
495631c8c33df6acef342a7825cdf5fdfb3e26199b1f5676291f9bb907868e3e

SHA512
c0d791c06d43ce45d2d841777f3f18786da141a68652b22a3f2361d0a082067fffefcac59dc980d4fefb450431cdc84a17ee4097b3e2849b7733372a6f838a5d

Download Submit
memory/2088-3-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2088-70-0x0000000000405000-0x0000000000406000-memory.dmp

Filesize
4KB

Download
memory/2088-73926-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2088-0-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2088-73924-0x0000000002560000-0x00000000025B7000-memory.dmp

Filesize
348KB

Download
memory/3200-147853-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/3260-147854-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3260-147829-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3260-147841-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/32904-73925-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/32904-73971-0x00000000032A0000-0x00000000032F7000-memory.dmp

Filesize
348KB

Download
memory/32904-73918-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/32904-73955-0x00000000032A0000-0x00000000032F7000-memory.dmp

Filesize
348KB

Download
memory/32904-73970-0x00000000032A0000-0x00000000032F7000-memory.dmp

Filesize
348KB

Download
memory/32904-73969-0x00000000032A0000-0x00000000032F7000-memory.dmp

Filesize
348KB

Download
memory/32904-73928-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/32904-73916-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/32904-147846-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/32904-73927-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/32904-73920-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/32904-147840-0x0000000000400000-0x000000000040B000-memory.dmp

Filesize
44KB

Download
memory/32904-73922-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/33160-147842-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/33160-73974-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download