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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-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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Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation u3b8.0.exe Key value queried \REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation IEBFIEBAFC.exe Key value queried \REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe -
Executes dropped EXE 3 IoCs
pid Process 4592 u3b8.0.exe 4112 u3b8.1.exe 4952 IEBFIEBAFC.exe -
Loads dropped DLL 2 IoCs
pid Process 4592 u3b8.0.exe 4592 u3b8.0.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 behavioral1/files/0x000a000000023120-23.dat upx behavioral1/memory/4112-29-0x0000000000400000-0x0000000000930000-memory.dmp upx behavioral1/memory/4112-125-0x0000000000400000-0x0000000000930000-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 2324 4292 WerFault.exe 84 3528 4592 WerFault.exe 89 1616 4592 WerFault.exe 89 2076 4592 WerFault.exe 89 -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString u3b8.0.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 u3b8.0.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 4612 schtasks.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 676 PING.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 4592 u3b8.0.exe 4592 u3b8.0.exe 4592 u3b8.0.exe 4592 u3b8.0.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4112 u3b8.1.exe -
Suspicious use of WriteProcessMemory 27 IoCs
description pid Process procid_target PID 4292 wrote to memory of 4592 4292 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 89 PID 4292 wrote to memory of 4592 4292 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 89 PID 4292 wrote to memory of 4592 4292 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 89 PID 4292 wrote to memory of 4112 4292 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 93 PID 4292 wrote to memory of 4112 4292 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 93 PID 4292 wrote to memory of 4112 4292 a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe 93 PID 4112 wrote to memory of 3236 4112 u3b8.1.exe 99 PID 4112 wrote to memory of 3236 4112 u3b8.1.exe 99 PID 4112 wrote to memory of 3236 4112 u3b8.1.exe 99 PID 3236 wrote to memory of 372 3236 cmd.exe 101 PID 3236 wrote to memory of 372 3236 cmd.exe 101 PID 3236 wrote to memory of 372 3236 cmd.exe 101 PID 3236 wrote to memory of 4612 3236 cmd.exe 102 PID 3236 wrote to memory of 4612 3236 cmd.exe 102 PID 3236 wrote to memory of 4612 3236 cmd.exe 102 PID 4592 wrote to memory of 4356 4592 u3b8.0.exe 106 PID 4592 wrote to memory of 4356 4592 u3b8.0.exe 106 PID 4592 wrote to memory of 4356 4592 u3b8.0.exe 106 PID 4356 wrote to memory of 4952 4356 cmd.exe 110 PID 4356 wrote to memory of 4952 4356 cmd.exe 110 PID 4356 wrote to memory of 4952 4356 cmd.exe 110 PID 4952 wrote to memory of 4864 4952 IEBFIEBAFC.exe 113 PID 4952 wrote to memory of 4864 4952 IEBFIEBAFC.exe 113 PID 4952 wrote to memory of 4864 4952 IEBFIEBAFC.exe 113 PID 4864 wrote to memory of 676 4864 cmd.exe 116 PID 4864 wrote to memory of 676 4864 cmd.exe 116 PID 4864 wrote to memory of 676 4864 cmd.exe 116
Processes
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C:\Users\Admin\AppData\Local\Temp\a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe"C:\Users\Admin\AppData\Local\Temp\a9816b1f5c43253c0b7af790ee87e29c8203b12bdd2dac78d59c9f4c375f629a.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4292 -
C:\Users\Admin\AppData\Local\Temp\u3b8.0.exe"C:\Users\Admin\AppData\Local\Temp\u3b8.0.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4592 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\IEBFIEBAFC.exe"3⤵
- Suspicious use of WriteProcessMemory
PID:4356 -
C:\Users\Admin\AppData\Local\Temp\IEBFIEBAFC.exe"C:\Users\Admin\AppData\Local\Temp\IEBFIEBAFC.exe"4⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4952 -
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\IEBFIEBAFC.exe5⤵
- Suspicious use of WriteProcessMemory
PID:4864 -
C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30006⤵
- Runs ping.exe
PID:676
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4592 -s 24723⤵
- Program crash
PID:3528
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4592 -s 24803⤵
- Program crash
PID:1616
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4592 -s 24163⤵
- Program crash
PID:2076
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C:\Users\Admin\AppData\Local\Temp\u3b8.1.exe"C:\Users\Admin\AppData\Local\Temp\u3b8.1.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4112 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "3⤵
- Suspicious use of WriteProcessMemory
PID:3236 -
C:\Windows\SysWOW64\chcp.comchcp 12514⤵PID:372
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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:4612
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4292 -s 11482⤵
- Program crash
PID:2324
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4292 -ip 42921⤵PID:2824
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4592 -ip 45921⤵PID:4396
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4592 -ip 45921⤵PID:5116
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 4592 -ip 45921⤵PID:1128
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