Analysis
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max time kernel
90s -
max time network
139s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
23/12/2022, 01:31
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
2.0MB
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MD5
33c01c931d646f2282076738f61386d2
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SHA1
d4092f24705d91a54c2b79553cc26c04451c96a2
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SHA256
876aa06eb3062b728e3507fdf753bac180b9a1e57ff8ed46078367f9d41dd745
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SHA512
5ba2d4ee6659d6b0d629074b1814ef58602b27f4d067fa052df0228482f81966c48765e03004a3cb7a3a28c4470fc9d728ae426786e9675ee839cd7b1737062b
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SSDEEP
49152:/V9rSMgv1gTfLKegeI3JnspSiYvy/eQGpCQn2CH6EWP7p3d:/VzLK9CS7T2XEGdd
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4708 is-A8BDC.tmp 3512 SplitFiles117.exe 448 sCzewsN9TvyCgL.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 SplitFiles117.exe -
Loads dropped DLL 1 IoCs
pid Process 4708 is-A8BDC.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\language\is-V86PR.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\language\is-GEGTK.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\is-DIECI.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\language\is-EA37K.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\language\is-28HBJ.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\is-E3BEU.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\is-KLS3S.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\language\is-3DF5G.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\language\is-6NJF4.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\language\is-N13Q9.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\is-GNO12.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\language\is-T5P9T.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\language\is-IRVQP.tmp is-A8BDC.tmp File created C:\Program Files (x86)\Split Files\is-GJUI4.tmp is-A8BDC.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-A8BDC.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles117.exe is-A8BDC.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 5104 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3512 SplitFiles117.exe 3512 SplitFiles117.exe 3512 SplitFiles117.exe 3512 SplitFiles117.exe 3512 SplitFiles117.exe 3512 SplitFiles117.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 5104 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4300 wrote to memory of 4708 4300 file.exe 82 PID 4300 wrote to memory of 4708 4300 file.exe 82 PID 4300 wrote to memory of 4708 4300 file.exe 82 PID 4708 wrote to memory of 3512 4708 is-A8BDC.tmp 83 PID 4708 wrote to memory of 3512 4708 is-A8BDC.tmp 83 PID 4708 wrote to memory of 3512 4708 is-A8BDC.tmp 83 PID 3512 wrote to memory of 448 3512 SplitFiles117.exe 84 PID 3512 wrote to memory of 448 3512 SplitFiles117.exe 84 PID 3512 wrote to memory of 448 3512 SplitFiles117.exe 84 PID 3512 wrote to memory of 4248 3512 SplitFiles117.exe 92 PID 3512 wrote to memory of 4248 3512 SplitFiles117.exe 92 PID 3512 wrote to memory of 4248 3512 SplitFiles117.exe 92 PID 4248 wrote to memory of 5104 4248 cmd.exe 94 PID 4248 wrote to memory of 5104 4248 cmd.exe 94 PID 4248 wrote to memory of 5104 4248 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:4300 -
C:\Users\Admin\AppData\Local\Temp\is-VL036.tmp\is-A8BDC.tmp"C:\Users\Admin\AppData\Local\Temp\is-VL036.tmp\is-A8BDC.tmp" /SL4 $801C4 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1800857 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4708 -
C:\Program Files (x86)\Split Files\SplitFiles117.exe"C:\Program Files (x86)\Split Files\SplitFiles117.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3512 -
C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\sCzewsN9TvyCgL.exe4⤵
- Executes dropped EXE
PID:448
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles117.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles117.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:4248 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles117.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:5104
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.4MB
MD571f25f23a8f8004fc0ad8b744eaed10d
SHA1e6bbab1f671f7a8d6fbbe5eaf48681e349367611
SHA256ec15ad327570e4fbe7871075765a25f9afff36d8763f2e4bd4c894c86b31e02b
SHA512693d8a8a6c37aa07d134af2cd48d4c705b2c22211cea356c57365c503d051fa8eedc41919f82338c92959b94d9da08d16150c5a53a7ed8e9918f9dea07984e4e
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Filesize
3.4MB
MD571f25f23a8f8004fc0ad8b744eaed10d
SHA1e6bbab1f671f7a8d6fbbe5eaf48681e349367611
SHA256ec15ad327570e4fbe7871075765a25f9afff36d8763f2e4bd4c894c86b31e02b
SHA512693d8a8a6c37aa07d134af2cd48d4c705b2c22211cea356c57365c503d051fa8eedc41919f82338c92959b94d9da08d16150c5a53a7ed8e9918f9dea07984e4e
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
723KB
MD57fd7ec3d32ed2a377fa18e8931475b2e
SHA130b386da1750701f78cbf65550f32661d8a4175f
SHA2560290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455
SHA512db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334
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Filesize
723KB
MD57fd7ec3d32ed2a377fa18e8931475b2e
SHA130b386da1750701f78cbf65550f32661d8a4175f
SHA2560290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455
SHA512db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c