Analysis
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max time kernel
66s -
max time network
129s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
29/12/2022, 07:09
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
9147871d5f5abbfa3f2c2b66e5326e2c
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SHA1
18d47c00b6d8c175249cf76d1ec366803e452d5a
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SHA256
fc711b6088e7ea393ccbe94d19924936c9d0b80bd86bac7c7fee9382547d6c33
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SHA512
54c03195ec812e3e04aa3faaf3f853f479d4a8c49f2530e36197d5e8ecb92a9146cff31db5c730f9cfe1a9ab7a029b85023cc8e0be23a218c27b20a65501cd55
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SSDEEP
49152:0iNSQFWtIC1j3W5dsWIiQO8OH5bZXl/Nc:0iNSQFmIw379884a
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4900 is-MS1RT.tmp 1972 SplitFiles124.exe 5032 BUoOlRxQ.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation SplitFiles124.exe -
Loads dropped DLL 1 IoCs
pid Process 4900 is-MS1RT.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-BB8C1.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\is-A4660.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\is-QHB38.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\language\is-8DI20.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\language\is-OSKGM.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\language\is-KA5TB.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\language\is-73UCT.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\language\is-0N42G.tmp is-MS1RT.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\is-41ING.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\is-VEAE5.tmp is-MS1RT.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles124.exe is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\language\is-K9FTQ.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\language\is-JVA60.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\language\is-8SRR7.tmp is-MS1RT.tmp File created C:\Program Files (x86)\Split Files\is-504P7.tmp is-MS1RT.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 1628 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1972 SplitFiles124.exe 1972 SplitFiles124.exe 1972 SplitFiles124.exe 1972 SplitFiles124.exe 1972 SplitFiles124.exe 1972 SplitFiles124.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1628 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4696 wrote to memory of 4900 4696 file.exe 81 PID 4696 wrote to memory of 4900 4696 file.exe 81 PID 4696 wrote to memory of 4900 4696 file.exe 81 PID 4900 wrote to memory of 1972 4900 is-MS1RT.tmp 82 PID 4900 wrote to memory of 1972 4900 is-MS1RT.tmp 82 PID 4900 wrote to memory of 1972 4900 is-MS1RT.tmp 82 PID 1972 wrote to memory of 5032 1972 SplitFiles124.exe 83 PID 1972 wrote to memory of 5032 1972 SplitFiles124.exe 83 PID 1972 wrote to memory of 5032 1972 SplitFiles124.exe 83 PID 1972 wrote to memory of 2252 1972 SplitFiles124.exe 85 PID 1972 wrote to memory of 2252 1972 SplitFiles124.exe 85 PID 1972 wrote to memory of 2252 1972 SplitFiles124.exe 85 PID 2252 wrote to memory of 1628 2252 cmd.exe 87 PID 2252 wrote to memory of 1628 2252 cmd.exe 87 PID 2252 wrote to memory of 1628 2252 cmd.exe 87
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:4696 -
C:\Users\Admin\AppData\Local\Temp\is-H97I8.tmp\is-MS1RT.tmp"C:\Users\Admin\AppData\Local\Temp\is-H97I8.tmp\is-MS1RT.tmp" /SL4 $A0046 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1635962 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4900 -
C:\Program Files (x86)\Split Files\SplitFiles124.exe"C:\Program Files (x86)\Split Files\SplitFiles124.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1972 -
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\BUoOlRxQ.exe4⤵
- Executes dropped EXE
PID:5032
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles124.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles124.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:2252 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles124.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1628
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD5c1841b6008a867b0cce3bd803c12a3d2
SHA1b658e5e1506e7369e2ef35a7745504d8d5e82b05
SHA256e4272a1e17d3af9ed0e3e880a62e4c1f28017e736c99b3399f47fdfe7d156d01
SHA5125d0914fb89a029257e20c4ee14446034fdb081fbff97736407c3169c5cc8be2bf91ef8192479d482d95d591b08e525c834206ef51baec7693a9885420b3122d1
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Filesize
3.1MB
MD5c1841b6008a867b0cce3bd803c12a3d2
SHA1b658e5e1506e7369e2ef35a7745504d8d5e82b05
SHA256e4272a1e17d3af9ed0e3e880a62e4c1f28017e736c99b3399f47fdfe7d156d01
SHA5125d0914fb89a029257e20c4ee14446034fdb081fbff97736407c3169c5cc8be2bf91ef8192479d482d95d591b08e525c834206ef51baec7693a9885420b3122d1
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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