Analysis
- max time kernel
155s - max time network
160s - platform
windows7_x64 - resource
win7v20210408 - submitted
31/08/2021, 06:49
Static task
static1
Behavioral task
behavioral1
Sample
41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe
Resource
win7v20210408
0 signatures
0 seconds
Behavioral task
behavioral2
Sample
41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe
Resource
win10v20210408
0 signatures
0 seconds
General
- Target 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe
- Size 799KB
- Sample210831-4c3gef4was
- SHA256 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd
- MD5 0c9d4bd0d22065563920ced480065b24
- SHA1 62613a91b25ba4f6a0160b82bc9da0177085fe60
- SHA512 c9ad317fd124c6d4467a2139e5fbb286075f3ad9eaaff3b7412fdec567a3c01b4e76b72552a6ce2d2003af722c08c15f9ad456225b87649fcec0a3d6f5db9634
- MD5 SHA1 SHA512
Score
10/10
Malware Config
Extracted
Family
-
asyncrat
Version
-
0.5.7B
C2
-
null:null
Mutex
-
AsyncMutex_6SI8OkPnk
Attributes
-
aes_key
dDhvNMBYIS0cSEdqEZsTWnat4JCbi1fh
-
anti_detection
false
-
autorun
true
-
bdos
false
-
delay
ASE_2
-
host
null
-
hwid
3
- install_file
-
install_folder
%AppData%
-
mutex
AsyncMutex_6SI8OkPnk
-
pastebin_config
https://aa.larinax999.repl.co
-
port
null
-
version
0.5.7B
aes.plain
Signatures
- Async RAT payload 6 IoCs
resource yara_rule behavioral1/files/0x00040000000130d8-62.dat asyncrat behavioral1/files/0x00040000000130d8-64.dat asyncrat behavioral1/files/0x00040000000130d8-65.dat asyncrat behavioral1/files/0x00030000000130e4-84.dat asyncrat behavioral1/files/0x00030000000130e4-85.dat asyncrat behavioral1/files/0x00030000000130e4-87.dat asyncrat - Executes dropped EXE 3 IoCs
pid Process 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 1960 Synaptics.exe 1940 MsMpEng.exe -
resource yara_rule behavioral1/files/0x00030000000130e9-90.dat office_macros - Loads dropped DLL 4 IoCs
pid Process 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 1748 cmd.exe - Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\SS CRACK RETRIX = "C:\\ProgramData\\Synaptics\\Synaptics.exe" 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 820 schtasks.exe - Delays execution with timeout.exe 1 IoCs
pid Process 1056 timeout.exe - Enumerates system info in registry 2 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes" EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt EXCEL.EXE Set value (int) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55" EXCEL.EXE Key created \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105" EXCEL.EXE Set value (str) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000" EXCEL.EXE Set value (int) \REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1" EXCEL.EXE -
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13 MsMpEng.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\DAC9024F54D8F6DF94935FB1732638CA6AD77C13\Blob = 040000000100000010000000410352dc0ff7501b16f0028eba6f45c50f00000001000000140000005bcaa1c2780f0bcb5a90770451d96f38963f012d0b000000010000001e000000440053005400200052006f006f0074002000430041002000580033000000090000000100000016000000301406082b0601050507030406082b06010505070301140000000100000014000000c4a7b1a47b2c71fadbe14b9075ffc415608589101d00000001000000100000004558d512eecb27464920897de7b66053030000000100000014000000dac9024f54d8f6df94935fb1732638ca6ad77c131900000001000000100000006cf252fec3e8f20996de5d4dd9aef42420000000010000004e0300003082034a30820232a003020102021044afb080d6a327ba893039862ef8406b300d06092a864886f70d0101050500303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f74204341205833301e170d3030303933303231313231395a170d3231303933303134303131355a303f31243022060355040a131b4469676974616c205369676e617475726520547275737420436f2e311730150603550403130e44535420526f6f7420434120583330820122300d06092a864886f70d01010105000382010f003082010a0282010100dfafe99750088357b4cc6265f69082ecc7d32c6b30ca5becd9c37dc740c118148be0e83376492ae33f214993ac4e0eaf3e48cb65eefcd3210f65d22ad9328f8ce5f777b0127bb595c089a3a9baed732e7a0c063283a27e8a1430cd11a0e12a38b9790a31fd50bd8065dfb7516383c8e28861ea4b6181ec526bb9a2e24b1a289f48a39e0cda098e3e172e1edd20df5bc62a8aab2ebd70adc50b1a25907472c57b6aab34d63089ffe568137b540bc8d6aeec5a9c921e3d64b38cc6dfbfc94170ec1672d526ec38553943d0fcfd185c40f197ebd59a9b8d1dbada25b9c6d8dfc115023aabda6ef13e2ef55c089c3cd68369e4109b192ab62957e3e53d9b9ff0025d0203010001a3423040300f0603551d130101ff040530030101ff300e0603551d0f0101ff040403020106301d0603551d0e04160414c4a7b1a47b2c71fadbe14b9075ffc41560858910300d06092a864886f70d01010505000382010100a31a2c9b17005ca91eee2866373abf83c73f4bc309a095205de3d95944d23e0d3ebd8a4ba0741fce10829c741a1d7e981addcb134bb32044e491e9ccfc7da5db6ae5fee6fde04eddb7003ab57049aff2e5eb02f1d1028b19cb943a5e48c4181e58195f1e025af00cf1b1ada9dc59868b6ee991f586cafab96633aa595bcee2a7167347cb2bcc99b03748cfe3564bf5cf0f0c723287c6f044bb53726d43f526489a5267b758abfe67767178db0da256141339243185a2a8025a3047e1dd5007bc02099000eb6463609b16bc88c912e6d27d918bf93d328d65b4e97cb15776eac5b62839bf15651cc8f677966a0a8d770bd8910b048e07db29b60aee9d82353510 MsMpEng.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C Synaptics.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C\Blob = 0f00000001000000140000005a6d07b6371d966a2fb6ba92828ce5512a49513d090000000100000068000000306606082b0601050507030106082b0601050507030206082b0601050507030306082b0601050507030406082b0601050507030806082b06010505070309060a2b0601040182370a030406082b0601050507030606082b0601050507030706082b060105050802025300000001000000230000003021301f06092b06010401a032010130123010060a2b0601040182373c0101030200c00b000000010000001600000047006c006f00620061006c005300690067006e000000140000000100000014000000607b661a450d97ca89502f7d04cd34a8fffcfd4b1d00000001000000100000006ee7f3b060d10e90a31ba3471b999236030000000100000014000000b1bc968bd4f49d622aa89a81f2150152a41d829c200000000100000079030000308203753082025da003020102020b040000000001154b5ac394300d06092a864886f70d01010505003057310b300906035504061302424531193017060355040a1310476c6f62616c5369676e206e762d73613110300e060355040b1307526f6f74204341311b301906035504031312476c6f62616c5369676e20526f6f74204341301e170d3938303930313132303030305a170d3238303132383132303030305a3057310b300906035504061302424531193017060355040a1310476c6f62616c5369676e206e762d73613110300e060355040b1307526f6f74204341311b301906035504031312476c6f62616c5369676e20526f6f7420434130820122300d06092a864886f70d01010105000382010f003082010a0282010100da0ee6998dcea3e34f8a7efbf18b83256bea481ff12ab0b9951104bdf063d1e26766cf1cddcf1b482bee8d898e9aaf298065abe9c72d12cbab1c4c7007a13d0a30cd158d4ff8ddd48c50151cef50eec42ef7fce952f2917de06dd535308e5e4373f241e9d56ae3b2893a5639386f063c88695b2a4dc5a754b86c89cc9bf93ccae5fd89f5123c927896d6dc746e934461d18dc746b2750e86e8198ad56d6cd5781695a2e9c80a38ebf224134f73549313853a1bbc1e34b58b058cb9778bb1db1f2091ab09536e90ce7b3774b97047912251631679aeb1ae412608c8192bd146aa48d6642ad78334ff2c2ac16c19434a0785e7d37cf62168efeaf2529f7f9390cf0203010001a3423040300e0603551d0f0101ff040403020106300f0603551d130101ff040530030101ff301d0603551d0e04160414607b661a450d97ca89502f7d04cd34a8fffcfd4b300d06092a864886f70d01010505000382010100d673e77c4f76d08dbfecbaa2be34c52832b57cfc6c9c2c2bbd099e53bf6b5eaa1148b6e508a3b3ca3d614dd34609b33ec3a0e363551bf2baefad39e143b938a3e62f8a263befa05056f9c60afd38cdc40b705194979804dfc35f94d515c914419cc45d7564150dff5530ec868fff0def2cb96346f6aafcdfbc69fd2e1248649ae095f0a6ef298f01b115b50c1da5fe692c6924781eb3a71c7162eecac897ac175d8ac2f847866e2ac4563195d06789852bf96ca65d469d0caa82e49951dd70b7db563d61e46ae15cd6f6fe3dde41cc07ae6352bf5353f42be9c7fdb6f7825f85d24118db81b3041cc51fa4806f1520c9de0c880a1dd66655e2fc48c9292669e0 Synaptics.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\B1BC968BD4F49D622AA89A81F2150152A41D829C\Blob = 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 Synaptics.exe - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1620 EXCEL.EXE - Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe Token: SeDebugPrivilege 1940 MsMpEng.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1620 EXCEL.EXE - Suspicious use of WriteProcessMemory 28 IoCs
description pid Process procid_target PID 684 wrote to memory of 1176 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 26 PID 684 wrote to memory of 1176 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 26 PID 684 wrote to memory of 1176 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 26 PID 684 wrote to memory of 1176 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 26 PID 684 wrote to memory of 1960 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 27 PID 684 wrote to memory of 1960 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 27 PID 684 wrote to memory of 1960 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 27 PID 684 wrote to memory of 1960 684 41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 27 PID 1176 wrote to memory of 988 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 32 PID 1176 wrote to memory of 988 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 32 PID 1176 wrote to memory of 988 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 32 PID 1176 wrote to memory of 988 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 32 PID 1176 wrote to memory of 1748 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 34 PID 1176 wrote to memory of 1748 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 34 PID 1176 wrote to memory of 1748 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 34 PID 1176 wrote to memory of 1748 1176 ._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe 34 PID 988 wrote to memory of 820 988 cmd.exe 36 PID 988 wrote to memory of 820 988 cmd.exe 36 PID 988 wrote to memory of 820 988 cmd.exe 36 PID 988 wrote to memory of 820 988 cmd.exe 36 PID 1748 wrote to memory of 1056 1748 cmd.exe 37 PID 1748 wrote to memory of 1056 1748 cmd.exe 37 PID 1748 wrote to memory of 1056 1748 cmd.exe 37 PID 1748 wrote to memory of 1056 1748 cmd.exe 37 PID 1748 wrote to memory of 1940 1748 cmd.exe 38 PID 1748 wrote to memory of 1940 1748 cmd.exe 38 PID 1748 wrote to memory of 1940 1748 cmd.exe 38 PID 1748 wrote to memory of 1940 1748 cmd.exe 38
Processes
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C:\Users\Admin\AppData\Local\Temp\41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe"C:\Users\Admin\AppData\Local\Temp\41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:684 -
C:\Users\Admin\AppData\Local\Temp\._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe"C:\Users\Admin\AppData\Local\Temp\._cache_41b5691a9272ab9dcb87a5f3f106da073fc3d2c4aea1abd78ac7b3af4cbbffdd.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1176 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "MsMpEng" /tr '"C:\Users\Admin\AppData\Roaming\MsMpEng.exe"' & exit3⤵
- Suspicious use of WriteProcessMemory
PID:988 -
C:\Windows\SysWOW64\schtasks.exeschtasks /create /f /sc onlogon /rl highest /tn "MsMpEng" /tr '"C:\Users\Admin\AppData\Roaming\MsMpEng.exe"'4⤵
- Creates scheduled task(s)
PID:820
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C:\Windows\SysWOW64\cmd.execmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpB319.tmp.bat""3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1748 -
C:\Windows\SysWOW64\timeout.exetimeout 34⤵
- Delays execution with timeout.exe
PID:1056
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C:\Users\Admin\AppData\Roaming\MsMpEng.exe"C:\Users\Admin\AppData\Roaming\MsMpEng.exe"4⤵
- Executes dropped EXE
- Modifies system certificate store
- Suspicious use of AdjustPrivilegeToken
PID:1940
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C:\ProgramData\Synaptics\Synaptics.exe"C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate2⤵
- Executes dropped EXE
- Modifies system certificate store
PID:1960
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C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /automation -Embedding1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1620