fasong | f840df8627616f8f658c8b8b650424f916719a6aae59d365f0b712e38096bdaf

Analysis

max time kernel
148s
max time network
138s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
18/09/2026, 17:33

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General

Target
jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Size 600KB
Sample260918-v41dsaag38
SHA256 f840df8627616f8f658c8b8b650424f916719a6aae59d365f0b712e38096bdaf
MD5 4eb94e90b3d1e2c65cfde5044c1dafbc
SHA1 50506478f9974a9dad948b5bc26710cd39fa35c8
SHA512 2e1cacac435c9046150c92eab9f2a2f6b612b93ae68ec3b7f65e57e5c58aa14ac9a4d8f546f16678004a760dafe69538510bc334df66382a87f9f1d357410333
SSDEEP 6144:hRhE3qubQqZiyVmLAVPY/pUgUrhqWrRHyDz7+gedJiYksrosWixu/1mqEm6pa8zN:fhE3yqZ5VvnoWrQmvBksNSSzA
TLSH
T1E6D48D26F7D08833D2632A3C9C9B97649926BDA03D3964463BF92D4C4F3978179263C7
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery fasong upx worm

Malware Config

Signatures

Family: Fasong
Fasong is a Windows worm written in Delphi.
worm fasong

Detects Fasong 7 IoCs

resource	yara_rule
behavioral2/memory/5776-0-0x0000000000400000-0x0000000000496000-memory.dmp	family_fasong
behavioral2/memory/5776-2-0x0000000000400000-0x0000000000496000-memory.dmp	family_fasong
behavioral2/files/0x000e00000001c53d-8.dat	family_fasong
behavioral2/files/0x000100000000002d-17.dat	family_fasong
behavioral2/memory/5392-19-0x0000000000400000-0x0000000000496000-memory.dmp	family_fasong
behavioral2/memory/5776-21-0x0000000000400000-0x0000000000496000-memory.dmp	family_fasong
behavioral2/memory/5392-20-0x0000000000400000-0x0000000000496000-memory.dmp	family_fasong

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000e00000001c53d-8.dat	acprotect

Executes dropped EXE 1 IoCs

pid	Process
5392	svchost.exe

Loads dropped DLL 2 IoCs

pid	Process
5776	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
5776	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe

Enumerates connected drives 3 TTPs 34 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\G:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\I:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\N:	svchost.exe
File opened (read-only)	\??\P:	svchost.exe
File opened (read-only)	\??\J:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\L:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\J:	svchost.exe
File opened (read-only)	\??\O:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\Q:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\I:	svchost.exe
File opened (read-only)	\??\Q:	svchost.exe
File opened (read-only)	\??\R:	svchost.exe
File opened (read-only)	\??\U:	svchost.exe
File opened (read-only)	\??\V:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\K:	svchost.exe
File opened (read-only)	\??\M:	svchost.exe
File opened (read-only)	\??\S:	svchost.exe
File opened (read-only)	\??\U:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\H:	svchost.exe
File opened (read-only)	\??\V:	svchost.exe
File opened (read-only)	\??\D:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\H:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\R:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\D:	svchost.exe
File opened (read-only)	\??\G:	svchost.exe
File opened (read-only)	\??\L:	svchost.exe
File opened (read-only)	\??\O:	svchost.exe
File opened (read-only)	\??\T:	svchost.exe
File opened (read-only)	\??\K:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\M:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\N:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\P:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\S:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened (read-only)	\??\T:	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\NSA.dll	svchost.exe
File created	C:\Windows\SysWOW64\QMCYXLT.dll	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
File opened for modification	C:\Windows\SysWOW64\QMCYXLT.dll	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5776-0-0x0000000000400000-0x0000000000496000-memory.dmp	upx
behavioral2/memory/5776-2-0x0000000000400000-0x0000000000496000-memory.dmp	upx
behavioral2/files/0x000e00000001c53d-8.dat	upx
behavioral2/memory/5776-14-0x0000000002390000-0x00000000023B0000-memory.dmp	upx
behavioral2/memory/5776-13-0x0000000002390000-0x00000000023B0000-memory.dmp	upx
behavioral2/files/0x000100000000002d-17.dat	upx
behavioral2/memory/5392-19-0x0000000000400000-0x0000000000496000-memory.dmp	upx
behavioral2/memory/5776-21-0x0000000000400000-0x0000000000496000-memory.dmp	upx
behavioral2/memory/5392-20-0x0000000000400000-0x0000000000496000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 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	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Modifies registry class 15 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{58826D8F-D0BB-4A05-A413-4585F3D0911A}\ = "Webhook1005PV"	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{58826D8F-D0BB-4A05-A413-4585F3D0911A}\InprocServer32	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{58826D8F-D0BB-4A05-A413-4585F3D0911A}\InprocServer32\ = "C:\\Windows\\SysWow64\\QMCYXLT.dll"	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{58826D8F-D0BB-4A05-A413-4585F3D0911A}\InprocServer32\ThreadingModel = "Apartment"	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\QMCYXLT.ExecuteHookWebPV1005	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\QMCYXLT.ExecuteHookWebPV1005\Clsid\ = "{58826D8F-D0BB-4A05-A413-4585F3D0911A}"	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{58826D8F-D0BB-4A05-A413-4585F3D0911A}\ProgID	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{58826D8F-D0BB-4A05-A413-4585F3D0911A}\ProgID\ = "QMCYXLT.ExecuteHookWebPV1005"	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WPWorkFilePV1005	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WPWorkFilePV1005\EFile = "054033164053039191078128051038075248253068120151070147197023188098140226023033116242190212152197041003208091201211140038"	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\QMCYXLT.ExecuteHookWebPV1005\ = "Webhook1005PV"	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\QMCYXLT.ExecuteHookWebPV1005\Clsid	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WPWorkFilePV1005\DFile = "056047157053032178028000051035069155149064161042019130224037240014214025239237106192010076242056229002101118095236012059067095133120"	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WPWorkFilePV1005	svchost.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{58826D8F-D0BB-4A05-A413-4585F3D0911A}	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
5776	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
5776	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
5392	svchost.exe

Suspicious use of WriteProcessMemory 1 IoCs

description	pid	Process	procid_target
PID 5776 wrote to memory of 5392	5776	jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe	87

C:\Users\Admin\AppData\Local\Temp\jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118__4eb94e90b3d1e2c65cfde5044c1dafbc.exe"
1⤵
- Loads dropped DLL
- Enumerates connected drives
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5776
- F:\$RECYCLE.BIN\svchost.exe
  F:\$RECYCLE.BIN\svchost.exe
  2⤵
  - Executes dropped EXE
  - Enumerates connected drives
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:5392

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

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

QMCYXLT.dll

Path C:\Windows\SysWOW64\QMCYXLT.dll
Size 647KB
SHA256 8b77cb35254475824b82a82383e2cfafdd561cd75c746d87b5ee5d20b5454ea2
MD5 9257a017867da7de7549099d6200eb75
SHA1 d744f48c5fc76755f0612334227ba0adfe3b6d6d
SHA512 bf9435565e30c9c0305cc964b85893413e76da8cb1ee78bf12c1abf8f0b2e1963dfe2a96a232a12cee0b56b44a6a9e8c76a9b2d1b013c3a24dcadd6bf60dca77
SSDEEP 6144:La8zDRhE3qubQqZiyVmLAVPY/pUgUrhqWrRHyDz7+gedJiYksrosWixu/1mqEm6N:lz9hE3yqZ5VvnoWrQmvBksNSSzA
TLSH
T118E49D26F7D08833D2732A3C9C9797649936BDA12D3964863BF83D4D4E397817926383
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

svchost.exe

Path F:\$RECYCLE.BIN\svchost.exe
Size 600KB
SHA256 22100b2f2f4eaf8db640ccfab4e854fc6bb2a9d94f1987e1ec83842b66385f85
MD5 20e76ffd97bdd6115da1046f861f2db3
SHA1 f3b7e7294f148b7fbc70db71091193c813b1bd2d
SHA512 c3a6339f8c90d59057286b38d44776c77fc88ec2a7bfc3f8dfc8840f92c4da4d19e1325bba0d913c773c4f3e97c3b9ec760977e981117b7be64e4c8bb4673418
SSDEEP 6144:hRhE3qubQqZiyVmLAVPY/pUgUrhqWrRHyDz7+gedJiYksrosWixu/1mqEm6pa8zN:fhE3yqZ5VvnoWrQmvBksNSSzA
TLSH
T173D48D26F7D08833D2632A3C9C9B97649926BDA03D3964463BF92D4C4F3978179263C7
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/5392-19-0x0000000000400000-0x0000000000496000-memory.dmp

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memory/5392-20-0x0000000000400000-0x0000000000496000-memory.dmp

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memory/5776-0-0x0000000000400000-0x0000000000496000-memory.dmp

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memory/5776-1-0x000000000045B000-0x000000000045C000-memory.dmp

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memory/5776-2-0x0000000000400000-0x0000000000496000-memory.dmp

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memory/5776-14-0x0000000002390000-0x00000000023B0000-memory.dmp

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memory/5776-13-0x0000000002390000-0x00000000023B0000-memory.dmp

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memory/5776-21-0x0000000000400000-0x0000000000496000-memory.dmp

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