Analysis
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max time kernel
99s -
max time network
117s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
29/12/2022, 02:23
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20221111-en
General
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Target
file.exe
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Size
1.8MB
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MD5
b13cf366b7409d4576ac1cb54e7975c2
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SHA1
597a42c37218cdd389119146eaaa88be79cbcf03
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SHA256
b04baa3e52d19b9dd594df416a02ae2be363293734d4b99904d69e2fb07ffe42
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SHA512
9d8767dd62e3f3964bf3b0a6a307b4cca7cc055adff62258cc43e5088e0960b1ef766f7c7bb1287e81ec3f98219d48af12622c70d6e73c9b198783118cfeea99
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SSDEEP
49152:AiyvIhX3HLWVT8hj+fAmSVf6K6qkbDDTr1Nw:AijLWVohj+fAmSZ6n/nPM
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 800 is-EUVBA.tmp 428 SplitFiles123.exe 4604 bbD8bQ6zIPUU2.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation SplitFiles123.exe -
Loads dropped DLL 1 IoCs
pid Process 800 is-EUVBA.tmp -
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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Drops file in Program Files directory 17 IoCs
description ioc Process File created C:\Program Files (x86)\Split Files\unins000.dat is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\language\is-AOKSG.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\language\is-R0R1E.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\language\is-5QSKM.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\is-QHRCR.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\is-8ENBN.tmp is-EUVBA.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\is-Q8V9L.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\language\is-MGSS6.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\language\is-NJ8EE.tmp is-EUVBA.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\language\is-TKMH6.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\language\is-K7VE4.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\language\is-SEAGH.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\is-RJ8L0.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\language\is-4KRJC.tmp is-EUVBA.tmp File created C:\Program Files (x86)\Split Files\is-FGGS8.tmp is-EUVBA.tmp -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Kills process with taskkill 1 IoCs
pid Process 1664 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 428 SplitFiles123.exe 428 SplitFiles123.exe 428 SplitFiles123.exe 428 SplitFiles123.exe 428 SplitFiles123.exe 428 SplitFiles123.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1664 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4280 wrote to memory of 800 4280 file.exe 82 PID 4280 wrote to memory of 800 4280 file.exe 82 PID 4280 wrote to memory of 800 4280 file.exe 82 PID 800 wrote to memory of 428 800 is-EUVBA.tmp 83 PID 800 wrote to memory of 428 800 is-EUVBA.tmp 83 PID 800 wrote to memory of 428 800 is-EUVBA.tmp 83 PID 428 wrote to memory of 4604 428 SplitFiles123.exe 84 PID 428 wrote to memory of 4604 428 SplitFiles123.exe 84 PID 428 wrote to memory of 4604 428 SplitFiles123.exe 84 PID 428 wrote to memory of 2044 428 SplitFiles123.exe 92 PID 428 wrote to memory of 2044 428 SplitFiles123.exe 92 PID 428 wrote to memory of 2044 428 SplitFiles123.exe 92 PID 2044 wrote to memory of 1664 2044 cmd.exe 94 PID 2044 wrote to memory of 1664 2044 cmd.exe 94 PID 2044 wrote to memory of 1664 2044 cmd.exe 94
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:4280 -
C:\Users\Admin\AppData\Local\Temp\is-AP5J9.tmp\is-EUVBA.tmp"C:\Users\Admin\AppData\Local\Temp\is-AP5J9.tmp\is-EUVBA.tmp" /SL4 $8016E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1606958 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:800 -
C:\Program Files (x86)\Split Files\SplitFiles123.exe"C:\Program Files (x86)\Split Files\SplitFiles123.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:428 -
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\bbD8bQ6zIPUU2.exe4⤵
- Executes dropped EXE
PID:4604
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles123.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles123.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:2044 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles123.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1664
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD5fa53155e4d60651618154ba13892b254
SHA115d77714a88aa339d0a895183a528d907b7697ba
SHA25689192fec4b9c3b6ad775fb0013ad8b578d6b900a6203fcacfa1e5cace480ff67
SHA512b698e978902adefe689969e6477917de8ac8d53b6db3b0868ab3c354e3b2fb488d1214eb95c8aaa9df13a3cec7b3c3e207e559268976a7878e41c69002ecc10d
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Filesize
3.1MB
MD5fa53155e4d60651618154ba13892b254
SHA115d77714a88aa339d0a895183a528d907b7697ba
SHA25689192fec4b9c3b6ad775fb0013ad8b578d6b900a6203fcacfa1e5cace480ff67
SHA512b698e978902adefe689969e6477917de8ac8d53b6db3b0868ab3c354e3b2fb488d1214eb95c8aaa9df13a3cec7b3c3e207e559268976a7878e41c69002ecc10d
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
688KB
MD5807603f3a565337ee2ac3e819b25ee58
SHA15cc4e6c82fbdda6697a1117561f23731d51baacd
SHA256682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423
SHA512252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d
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Filesize
688KB
MD5807603f3a565337ee2ac3e819b25ee58
SHA15cc4e6c82fbdda6697a1117561f23731d51baacd
SHA256682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423
SHA512252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c