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Analysis
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max time kernel
149s -
max time network
156s -
platform
windows11-21h2_x64 -
resource
win11-20240221-en -
resource tags
arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system -
submitted
28/03/2024, 16:38
Static task
static1
Behavioral task
behavioral1
Sample
a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe
Resource
win10v2004-20240226-en
General
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Target
a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe
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Size
404KB
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MD5
54762ca46c348dc6ab92e12250adbc68
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SHA1
aa8cafaf45d914c3a1fcb9618b1662dd83bfa3b9
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SHA256
a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a
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SHA512
92115352b14f7c6170513baba26baeff174c2ef9813919fc0fcb1d89fc1b0b0ad32daafa25cee3b832eb7c5bb63c8874744431300b6dbc8d8424b05090f099f5
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SSDEEP
12288:RzCZe/AA78MB6arGKFZqee8rFXUlgH4E0:R2OIMlHvl2gHF0
Malware Config
Extracted
stealc
http://185.172.128.209
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url_path
/3cd2b41cbde8fc9c.php
Signatures
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Downloads MZ/PE file
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Executes dropped EXE 3 IoCs
pid Process 3488 u3tk.0.exe 1032 u3tk.1.exe 1144 EGCBFIEHIE.exe -
Loads dropped DLL 2 IoCs
pid Process 3488 u3tk.0.exe 3488 u3tk.0.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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resource yara_rule behavioral2/files/0x0002000000029ef5-23.dat upx behavioral2/memory/1032-29-0x0000000000400000-0x0000000000930000-memory.dmp upx behavioral2/memory/1032-122-0x0000000000400000-0x0000000000930000-memory.dmp upx -
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 4 IoCs
pid pid_target Process procid_target 3472 4952 WerFault.exe 78 3000 3488 WerFault.exe 80 3124 3488 WerFault.exe 80 672 3488 WerFault.exe 80 -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 u3tk.0.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString u3tk.0.exe -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4832 schtasks.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 2468 PING.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 3488 u3tk.0.exe 3488 u3tk.0.exe 3488 u3tk.0.exe 3488 u3tk.0.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1032 u3tk.1.exe -
Suspicious use of WriteProcessMemory 27 IoCs
description pid Process procid_target PID 4952 wrote to memory of 3488 4952 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 80 PID 4952 wrote to memory of 3488 4952 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 80 PID 4952 wrote to memory of 3488 4952 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 80 PID 4952 wrote to memory of 1032 4952 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 83 PID 4952 wrote to memory of 1032 4952 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 83 PID 4952 wrote to memory of 1032 4952 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 83 PID 1032 wrote to memory of 3336 1032 u3tk.1.exe 87 PID 1032 wrote to memory of 3336 1032 u3tk.1.exe 87 PID 1032 wrote to memory of 3336 1032 u3tk.1.exe 87 PID 3336 wrote to memory of 1216 3336 cmd.exe 89 PID 3336 wrote to memory of 1216 3336 cmd.exe 89 PID 3336 wrote to memory of 1216 3336 cmd.exe 89 PID 3336 wrote to memory of 4832 3336 cmd.exe 90 PID 3336 wrote to memory of 4832 3336 cmd.exe 90 PID 3336 wrote to memory of 4832 3336 cmd.exe 90 PID 3488 wrote to memory of 5020 3488 u3tk.0.exe 91 PID 3488 wrote to memory of 5020 3488 u3tk.0.exe 91 PID 3488 wrote to memory of 5020 3488 u3tk.0.exe 91 PID 5020 wrote to memory of 1144 5020 cmd.exe 94 PID 5020 wrote to memory of 1144 5020 cmd.exe 94 PID 5020 wrote to memory of 1144 5020 cmd.exe 94 PID 1144 wrote to memory of 2968 1144 EGCBFIEHIE.exe 98 PID 1144 wrote to memory of 2968 1144 EGCBFIEHIE.exe 98 PID 1144 wrote to memory of 2968 1144 EGCBFIEHIE.exe 98 PID 2968 wrote to memory of 2468 2968 cmd.exe 100 PID 2968 wrote to memory of 2468 2968 cmd.exe 100 PID 2968 wrote to memory of 2468 2968 cmd.exe 100
Processes
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C:\Users\Admin\AppData\Local\Temp\a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe"C:\Users\Admin\AppData\Local\Temp\a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:4952 -
C:\Users\Admin\AppData\Local\Temp\u3tk.0.exe"C:\Users\Admin\AppData\Local\Temp\u3tk.0.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3488 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\EGCBFIEHIE.exe"3⤵
- Suspicious use of WriteProcessMemory
PID:5020 -
C:\Users\Admin\AppData\Local\Temp\EGCBFIEHIE.exe"C:\Users\Admin\AppData\Local\Temp\EGCBFIEHIE.exe"4⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1144 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\EGCBFIEHIE.exe5⤵
- Suspicious use of WriteProcessMemory
PID:2968 -
C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30006⤵
- Runs ping.exe
PID:2468
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3488 -s 24203⤵
- Program crash
PID:3000
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3488 -s 24283⤵
- Program crash
PID:3124
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3488 -s 24683⤵
- Program crash
PID:672
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C:\Users\Admin\AppData\Local\Temp\u3tk.1.exe"C:\Users\Admin\AppData\Local\Temp\u3tk.1.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1032 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "3⤵
- Suspicious use of WriteProcessMemory
PID:3336 -
C:\Windows\SysWOW64\chcp.comchcp 12514⤵PID:1216
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C:\Windows\SysWOW64\schtasks.exeschtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F4⤵
- Creates scheduled task(s)
PID:4832
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4952 -s 11602⤵
- Program crash
PID:3472
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4952 -ip 49521⤵PID:4484
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3488 -ip 34881⤵PID:1540
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3488 -ip 34881⤵PID:4880
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 400 -p 3488 -ip 34881⤵PID:4008
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
11KB
MD5a33e5b189842c5867f46566bdbf7a095
SHA1e1c06359f6a76da90d19e8fd95e79c832edb3196
SHA2565abf8e3d1f78de7b09d7f6fb87f9e80e60caacf13ef3c1289665653dacd7c454
SHA512f2ad3812ec9b915e9618539b0f103f2e9acaad25fbbacd84941c954ce070af231324e83a4621e951c1dbae8d40d50410954e40dd52bbd46e34c54b0d1957407b
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Filesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
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Filesize
106KB
MD5fe380780b5c35bd6d54541791151c2be
SHA17fe3a583cf91474c733f85cebf3c857682e269e1
SHA256b64a84d1f88e4e78464a1901c1cb5bbd5f00bb73203d719e64e072157a087b53
SHA512ba05ba8aa13c4bc1cf98fbf6c08b021e8b19354098e0397fc8e1e5d3dcce367c1063203f24e50d0973193f6535681d0a43486e5dade5d112853b7a2fe8739b6c
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Filesize
259KB
MD533cb94d692d4ced59558b5aac83f25ed
SHA114347ca8832295c7145e0aa44f805ca5190f9391
SHA25699c7b09f4f912134366464588c5e17d780af8e5097512e8e08a209ab677f45ea
SHA51230c68a7ac843c2044df4875bfe9a26227b6c8b1a7bca6bb5534085267d97c51686362e2858d647985dc2f073a27b9a064d75187d2c617a66ff7db0ce8d177f66
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Filesize
1.7MB
MD5eee5ddcffbed16222cac0a1b4e2e466e
SHA128b40c88b8ea50b0782e2bcbb4cc0f411035f3d5
SHA2562a40e5dccc7526c4982334941c90f95374460e2a816e84e724e98c4d52ae8c54
SHA5128f88901f3ebd425818db09f268df19ccf8a755603f04e9481bcf02b112a84393f8a900ead77f8f971bfa33fd9fa5636b7494aaee864a0fb04e3273911a4216dc
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Filesize
128B
MD511bb3db51f701d4e42d3287f71a6a43e
SHA163a4ee82223be6a62d04bdfe40ef8ba91ae49a86
SHA2566be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331
SHA512907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2