Analysis
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max time kernel
61s -
max time network
145s -
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, 23:01
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
1.9MB
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MD5
5a48972f51a842bb8cb956e7778c138a
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SHA1
15035e2705b798bba1ab887eedfb442f8fd50603
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SHA256
ae5bd8dc959479f13e4687c4f80083f5a02daf7fdd4826fa04cb1436daee205b
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SHA512
f4de71b90da35923c69fb6807d2f1348434f77ff1b1e4fa3b19f620c62db0818f3a5b8a792a67aebef27e01f17c1730f23ab37faa3f706372eb466a4617565bf
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SSDEEP
49152:8iQ8NK6D8urn5zF8i5z1uS94g/6zsOpRxhsR6Nb:8i9Yurn5z6CF4aasOns+
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4804 is-7PL6J.tmp 4116 SplitFiles123.exe 1216 hAMof7Wqjez9.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 4804 is-7PL6J.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-IRRVE.tmp is-7PL6J.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\language\is-NR2N1.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\language\is-PH13P.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\is-5QTHG.tmp is-7PL6J.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\language\is-586PA.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\language\is-5AIAA.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\is-Q7PI6.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\is-EM8I4.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\language\is-SEP9T.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\language\is-NTLBH.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\language\is-EN1EA.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\language\is-667U2.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\is-OGPIU.tmp is-7PL6J.tmp File created C:\Program Files (x86)\Split Files\is-M0LML.tmp is-7PL6J.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 1028 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4116 SplitFiles123.exe 4116 SplitFiles123.exe 4116 SplitFiles123.exe 4116 SplitFiles123.exe 4116 SplitFiles123.exe 4116 SplitFiles123.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1028 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4892 wrote to memory of 4804 4892 file.exe 81 PID 4892 wrote to memory of 4804 4892 file.exe 81 PID 4892 wrote to memory of 4804 4892 file.exe 81 PID 4804 wrote to memory of 4116 4804 is-7PL6J.tmp 82 PID 4804 wrote to memory of 4116 4804 is-7PL6J.tmp 82 PID 4804 wrote to memory of 4116 4804 is-7PL6J.tmp 82 PID 4116 wrote to memory of 1216 4116 SplitFiles123.exe 85 PID 4116 wrote to memory of 1216 4116 SplitFiles123.exe 85 PID 4116 wrote to memory of 1216 4116 SplitFiles123.exe 85 PID 4116 wrote to memory of 3992 4116 SplitFiles123.exe 91 PID 4116 wrote to memory of 3992 4116 SplitFiles123.exe 91 PID 4116 wrote to memory of 3992 4116 SplitFiles123.exe 91 PID 3992 wrote to memory of 1028 3992 cmd.exe 93 PID 3992 wrote to memory of 1028 3992 cmd.exe 93 PID 3992 wrote to memory of 1028 3992 cmd.exe 93
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:4892 -
C:\Users\Admin\AppData\Local\Temp\is-VSCKS.tmp\is-7PL6J.tmp"C:\Users\Admin\AppData\Local\Temp\is-VSCKS.tmp\is-7PL6J.tmp" /SL4 $8005E "C:\Users\Admin\AppData\Local\Temp\file.exe" 1749890 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4804 -
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:4116 -
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\hAMof7Wqjez9.exe4⤵
- Executes dropped EXE
PID:1216
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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:3992 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles123.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1028
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.3MB
MD5ff1e824845a835c8e7e8881a5eb0f956
SHA1bd56cbd91dd0d8b4698e2a30d2499234cc149004
SHA25630fb0fde2af946fe0f8eaf638f22ef67085b87c2cafd9a65573124ab13138945
SHA51298cc8b1d84f9dfdaf36a2927ddaf107809807b14115723ce635eddc593a6cae05f1c3de07a50ef296159520474826d0b0592aeb9b3241101f186a5ee0b2eab07
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Filesize
3.3MB
MD5ff1e824845a835c8e7e8881a5eb0f956
SHA1bd56cbd91dd0d8b4698e2a30d2499234cc149004
SHA25630fb0fde2af946fe0f8eaf638f22ef67085b87c2cafd9a65573124ab13138945
SHA51298cc8b1d84f9dfdaf36a2927ddaf107809807b14115723ce635eddc593a6cae05f1c3de07a50ef296159520474826d0b0592aeb9b3241101f186a5ee0b2eab07
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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