Analysis
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max time kernel
90s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
28/12/2022, 22:54
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220812-en
General
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Target
file.exe
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Size
1.7MB
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MD5
99b73194bf369af4bc5903c4d15078ae
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SHA1
358fee70d2e6976b336160bc32c14ecd08c3586f
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SHA256
47848ca8ad36d96dd27441603245168c36b48bcf8688195805116ffab44e0043
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SHA512
45437a8fd3b6b04c28516261e5a34155517113b46bd42f6dd3cec1866fad41cd0d2ff726d23bfe54a0bf6de31074d1ee0a2902e61b409aaf56e638b111e066c1
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SSDEEP
24576:upnibMM2xjvUw1UepKd68nldVSWkGAUSGOYfJ1zYFrkHwTWZsQgGAvASAq8DeyK0:UibiL1ppKM8kWpeYf/zU+MKkAWkHiNk
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 2724 is-SF13U.tmp 1788 SplitFiles123.exe 4668 vFanN1mvULC49V.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation SplitFiles123.exe -
Loads dropped DLL 1 IoCs
pid Process 2724 is-SF13U.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\is-7B2R0.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\language\is-KHLBL.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\language\is-5OFR5.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\is-NG22S.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\is-9B2EJ.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\is-F5GIE.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\language\is-UBEEO.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\language\is-9G5JS.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\language\is-KLQUP.tmp is-SF13U.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-SF13U.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe is-SF13U.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-SF13U.tmp File created C:\Program Files (x86)\Split Files\language\is-DHOTO.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\language\is-4CUJ1.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\is-0FNVN.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\language\is-ESCKT.tmp is-SF13U.tmp File created C:\Program Files (x86)\Split Files\language\is-AM9RP.tmp is-SF13U.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 4892 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1788 SplitFiles123.exe 1788 SplitFiles123.exe 1788 SplitFiles123.exe 1788 SplitFiles123.exe 1788 SplitFiles123.exe 1788 SplitFiles123.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4892 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 2200 wrote to memory of 2724 2200 file.exe 82 PID 2200 wrote to memory of 2724 2200 file.exe 82 PID 2200 wrote to memory of 2724 2200 file.exe 82 PID 2724 wrote to memory of 1788 2724 is-SF13U.tmp 83 PID 2724 wrote to memory of 1788 2724 is-SF13U.tmp 83 PID 2724 wrote to memory of 1788 2724 is-SF13U.tmp 83 PID 1788 wrote to memory of 4668 1788 SplitFiles123.exe 87 PID 1788 wrote to memory of 4668 1788 SplitFiles123.exe 87 PID 1788 wrote to memory of 4668 1788 SplitFiles123.exe 87 PID 1788 wrote to memory of 3520 1788 SplitFiles123.exe 92 PID 1788 wrote to memory of 3520 1788 SplitFiles123.exe 92 PID 1788 wrote to memory of 3520 1788 SplitFiles123.exe 92 PID 3520 wrote to memory of 4892 3520 cmd.exe 94 PID 3520 wrote to memory of 4892 3520 cmd.exe 94 PID 3520 wrote to memory of 4892 3520 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:2200 -
C:\Users\Admin\AppData\Local\Temp\is-TIKUM.tmp\is-SF13U.tmp"C:\Users\Admin\AppData\Local\Temp\is-TIKUM.tmp\is-SF13U.tmp" /SL4 $A005E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1550149 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2724 -
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:1788 -
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\vFanN1mvULC49V.exe4⤵
- Executes dropped EXE
PID:4668
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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:3520 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles123.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4892
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD5b23b21cea082011932e25cce5546a54c
SHA13752d44c3643d13957c3aa9791972f257e0bfe81
SHA256bd8ec48a4bfd617ef8dabd50c0d9957624adeafdeeb5f64b870f74d66bb52dbb
SHA512fc3bd7329470f348760e345eee834e85f7673dbbaf6337f9de86835bdcaf21217488e1c3ba2bf1f97d4d8a7dbd9685dafc064c9b62e97d94264262a8dbf893b8
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Filesize
3.1MB
MD5b23b21cea082011932e25cce5546a54c
SHA13752d44c3643d13957c3aa9791972f257e0bfe81
SHA256bd8ec48a4bfd617ef8dabd50c0d9957624adeafdeeb5f64b870f74d66bb52dbb
SHA512fc3bd7329470f348760e345eee834e85f7673dbbaf6337f9de86835bdcaf21217488e1c3ba2bf1f97d4d8a7dbd9685dafc064c9b62e97d94264262a8dbf893b8
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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