neshta | 0e5a0815a7c2ae0cc67cd267c8c8013fa0bdcfcace45a6f88460d8e8af70cf0f

Analysis

max time kernel
128s
max time network
139s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
01/01/2025, 10:41

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General

Target

FN CHECKER/FN CHECKER/FN CHECKER.exe
Size

997KB
MD5

d428119c48f140f0c31ebcef8d9d8f8a
SHA1

af9e82b05da11ea19d3381829ae56d2c3e74491b
SHA256

4b857cbd956518dfb4150be4da9e0c33eb31d086a99cae49c13713e32b24c9db
SHA512

5b0e34fa4cdfbd7f1b959ca5d7d739340165d6e95fa4bb3e198d20043f790c5d42afb784b27828fa19493c8137e7a25abbdcf34846e211d33954349bafa680b8
SSDEEP

24576:5FyISeHTiJKkt9SrQOLS7dUL/3rhEdMP9Mg:5EI1+IxrrLS0ThEdMKg

Score

10^/10

neshta xworm discovery persistence rat spyware trojan upx

Malware Config

Extracted

Family

xworm

Version

3.1

daddy.linkpc.net:7000

Mutex

487KBZwHTRfdTb7E

Attributes

install_file
USB.exe

aes.plain

Signatures

Detect Neshta payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000a0000000120d5-6.dat	family_neshta
behavioral1/memory/2024-47-0x0000000000400000-0x000000000041B000-memory.dmp	family_neshta

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000b0000000120d5-58.dat	family_xworm
behavioral1/memory/996-60-0x0000000000E20000-0x0000000000E30000-memory.dmp	family_xworm

Neshta
Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.
persistence spyware neshta
Neshta family
neshta
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Deletes itself 1 IoCs

pid	Process
2652	cmd.exe

Executes dropped EXE 5 IoCs

pid	Process
2024	FN CHECKER.exe
2908	FJQQND.exe
2736	FN CHECKER.exe
2772	Payload.exe
996	svchost‌.exe

Loads dropped DLL 2 IoCs

pid	Process
2024	FN CHECKER.exe
2024	FN CHECKER.exe

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	FN CHECKER.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/2908-50-0x0000000000400000-0x00000000004B6000-memory.dmp	autoit_exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral1/files/0x000500000001c880-17.dat	upx
behavioral1/memory/2908-29-0x0000000000400000-0x00000000004B6000-memory.dmp	upx
behavioral1/memory/2908-50-0x0000000000400000-0x00000000004B6000-memory.dmp	upx

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\svchost.com	FN CHECKER.exe

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 3 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	FN CHECKER.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FJQQND.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FN CHECKER.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2640	timeout.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2040	taskkill.exe

Modifies registry class 1 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\svchost.com \"%1\" %*"	FN CHECKER.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
996	svchost‌.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3036	FN CHECKER.exe
3036	FN CHECKER.exe
3036	FN CHECKER.exe
2772	Payload.exe
2772	Payload.exe
2772	Payload.exe
996	svchost‌.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3036	FN CHECKER.exe
Token: SeDebugPrivilege	2772	Payload.exe
Token: SeDebugPrivilege	2040	taskkill.exe
Token: SeDebugPrivilege	996	svchost‌.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
996	svchost‌.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 3036 wrote to memory of 2024	3036	FN CHECKER.exe	30
PID 3036 wrote to memory of 2024	3036	FN CHECKER.exe	30
PID 3036 wrote to memory of 2024	3036	FN CHECKER.exe	30
PID 3036 wrote to memory of 2024	3036	FN CHECKER.exe	30
PID 3036 wrote to memory of 2908	3036	FN CHECKER.exe	31
PID 3036 wrote to memory of 2908	3036	FN CHECKER.exe	31
PID 3036 wrote to memory of 2908	3036	FN CHECKER.exe	31
PID 3036 wrote to memory of 2908	3036	FN CHECKER.exe	31
PID 2024 wrote to memory of 2736	2024	FN CHECKER.exe	32
PID 2024 wrote to memory of 2736	2024	FN CHECKER.exe	32
PID 2024 wrote to memory of 2736	2024	FN CHECKER.exe	32
PID 2024 wrote to memory of 2736	2024	FN CHECKER.exe	32
PID 3036 wrote to memory of 2772	3036	FN CHECKER.exe	34
PID 3036 wrote to memory of 2772	3036	FN CHECKER.exe	34
PID 3036 wrote to memory of 2772	3036	FN CHECKER.exe	34
PID 3036 wrote to memory of 2652	3036	FN CHECKER.exe	35
PID 3036 wrote to memory of 2652	3036	FN CHECKER.exe	35
PID 3036 wrote to memory of 2652	3036	FN CHECKER.exe	35
PID 2652 wrote to memory of 2640	2652	cmd.exe	37
PID 2652 wrote to memory of 2640	2652	cmd.exe	37
PID 2652 wrote to memory of 2640	2652	cmd.exe	37
PID 2772 wrote to memory of 2040	2772	Payload.exe	38
PID 2772 wrote to memory of 2040	2772	Payload.exe	38
PID 2772 wrote to memory of 2040	2772	Payload.exe	38
PID 2772 wrote to memory of 1508	2772	Payload.exe	41
PID 2772 wrote to memory of 1508	2772	Payload.exe	41
PID 2772 wrote to memory of 1508	2772	Payload.exe	41
PID 2772 wrote to memory of 1940	2772	Payload.exe	43
PID 2772 wrote to memory of 1940	2772	Payload.exe	43
PID 2772 wrote to memory of 1940	2772	Payload.exe	43
PID 1716 wrote to memory of 996	1716	taskeng.exe	45
PID 1716 wrote to memory of 996	1716	taskeng.exe	45
PID 1716 wrote to memory of 996	1716	taskeng.exe	45

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\FN CHECKER\FN CHECKER\FN CHECKER.exe
"C:\Users\Admin\AppData\Local\Temp\FN CHECKER\FN CHECKER\FN CHECKER.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3036
- C:\Users\Admin\AppData\Local\Temp\FN CHECKER.exe
  "C:\Users\Admin\AppData\Local\Temp\FN CHECKER.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Modifies system executable filetype association
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:2024
- - C:\Users\Admin\AppData\Local\Temp\3582-490\FN CHECKER.exe
    "C:\Users\Admin\AppData\Local\Temp\3582-490\FN CHECKER.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2736
- C:\Users\Admin\AppData\Local\Temp\FJQQND.exe
  "C:\Users\Admin\AppData\Local\Temp\FJQQND.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2908
- C:\Users\Admin\AppData\Local\Temp\Payload.exe
  "C:\Users\Admin\AppData\Local\Temp\Payload.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2772
- - C:\Windows\system32\taskkill.exe
    "taskkill.exe" /im "svchost‌.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2040
- - C:\Windows\system32\schtasks.exe
    schtasks /run /TN "Update"
    3⤵
    PID:1508
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Del.vbs"
    3⤵
    PID:1940
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBB25.tmp.bat""
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2652
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2640

C:\Windows\system32\taskeng.exe
taskeng.exe {DA4D76A1-C295-42B7-9235-552EFF029E21} S-1-5-21-3551809350-4263495960-1443967649-1000:NNYJZAHP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Users\Admin\AppData\Roaming\svchost‌.exe
  C:\Users\Admin\AppData\Roaming\svchost‌.exe
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Event Triggered Execution

T1546

Change Default File Association

T1546.001

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\3582-490\FN CHECKER.exe

Filesize
88KB

MD5
4ea5c70d869d3a252b80ded9d17b0476

SHA1
c459b39cb29705564b2b3f81a2679d048bb66a2f

SHA256
d5c059ac87836bcdb43e937544ed82fbb83f0b6e43b12559ec899c340f25640d

SHA512
f9b9fb91af71f527caa76886e6b3bc8fbea824efd98178a5631daec91582c4ca5c8a1d01aae6be2b06b338be1d03e5a0b7893d83988241a9f2e2fe682c94acd0

Download Submit
C:\Users\Admin\AppData\Local\Temp\Del.vbs

Filesize
146B

MD5
a16d3da73c27fe0357e68065ddebb766

SHA1
5dd815f9b8696ec9537f5d8c89a71f14cdac650d

SHA256
64b7650c3b9dad3f49cd2a8a5aac82a3a8df1b8bd153a1b535e720d8c87f7ce7

SHA512
057388b481bd71aaebcae06d729875fb187eb12af8d1041e726f20d099859f1682304b8b3b5c7eacd19246d0c93405c3637ac546de6fa2c8e0a7945645a1940d

Download Submit
C:\Users\Admin\AppData\Local\Temp\FJQQND.exe

Filesize
781KB

MD5
68bcd60eb0ae68db9a6e2052df7b8270

SHA1
dc468b9b0b208511e6ddaeeb3acd4f43415d4fb6

SHA256
a287ab3424e595e875f31e4d893c14e70cf8cbd995ad38c6d29ce578c63e4a27

SHA512
68503c432c0199e62a82c857b2eef8a83dfc41513a37e36ed512668632f72d31fd646c4659376abbd4dc487ce0b739820e0ae16ddf76c4534eefeba1ce0567c7

Download Submit
C:\Users\Admin\AppData\Local\Temp\FN CHECKER.exe

Filesize
129KB

MD5
a446aa2b4904d28be4a7cc4c2490b1ed

SHA1
989a6f990fc6ef5e107b4d2883a8d47e2545ca76

SHA256
430241400ff1f21b9c90fd42ceebe570f67aa9e39a0e9002283eebd9b6b5f19c

SHA512
b8584f0a0d1e15594d7f1060a2883ab882b36673ff714b91bf9cab737cd685295fa142498d67fe0895d3cd5220a8f87c694fe7e11004eed02343fed953829d38

Download Submit
C:\Users\Admin\AppData\Local\Temp\Payload.exe

Filesize
262KB

MD5
1ecb45c5fcc8fe15e26cfa6eada84ed7

SHA1
798c9710e59324aef944c21b273206cdb1ece070

SHA256
d00e631cc47689cead47c38d535d8dc7bf8bbcc9f34ed46fa1d2b7fe232f0be5

SHA512
d26f9987f327ce5b5bfcc9dbcdbd19918e4b3a771d5a75b035dd6aab1ba0b43c92be0257451c26921a57ff4ddfac90a173e956f94113891bb19dc62b34dc2953

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBB25.tmp.bat

Filesize
184B

MD5
d319ef3443399d98667ade71f5e149ea

SHA1
0739cabd53f0927f877c5a8b344e8daf5809d4c4

SHA256
e16cfdc9b239f4efcc1ba66ddaa597a7e2136d170656a5c12229952089e21488

SHA512
a4ca06d38cef6b4d1d4d21102af09e021eb8e3fdc67013b5cc1f870664c51b84ff68132e7cf9a4fad2ba2002c8516a5fdc6020d1c81bfa03f664b44ef55133c8

Download Submit
C:\Users\Admin\AppData\Roaming\svchost‌.exe

Filesize
36KB

MD5
baf73551953ceb6ecbb13dbf164bfd6d

SHA1
19273b3eddbf9b9290401ae1cfcb3e664e042cfb

SHA256
b4de1d430d856f1fe1045eb90f8bf870795d0f6b09b930417d2648ebc64d69b4

SHA512
15a00412bb6c6095d2e05c62725c33bfff79a11f1f12435d964b3b9fe37bedb8b41e67e8e0f4b515b34fb22326424c3d3f3f4c04596c6973da56d50efa888943

Download Submit
memory/996-60-0x0000000000E20000-0x0000000000E30000-memory.dmp

Filesize
64KB

Download
memory/2024-47-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2772-36-0x00000000011D0000-0x000000000121A000-memory.dmp

Filesize
296KB

Download
memory/2908-50-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/2908-29-0x0000000000400000-0x00000000004B6000-memory.dmp

Filesize
728KB

Download
memory/3036-46-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/3036-0-0x000007FEF5433000-0x000007FEF5434000-memory.dmp

Filesize
4KB

Download
memory/3036-18-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/3036-1-0x00000000001A0000-0x00000000002A0000-memory.dmp

Filesize
1024KB

Download