Analysis
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max time kernel
61s -
max time network
148s -
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, 03:01
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
1.7MB
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MD5
7259a7741234e85560130ffb945bb2c8
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SHA1
74841b32e49e5cc8bf59791fe81869b991066d62
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SHA256
1aa3ec37c3a65c614d8e5d4ed78db075dc1deb0960aaece81baab114cde36ed7
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SHA512
4328cec55a9b30614204d99f816b92d20083eb223e5c5996042704973791fd0bed7396d13ccc1c318975f7ba1b53d388ad428f958a3dd8e37ebeecb7dbb084d2
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SSDEEP
24576:Wpnif9g2szGrcc0Mwkwi+ibTOtDnQIDDxCzKUYYkRpWhn7uhqhfY9jSHOHJ6rfBI:8if5szmckkim3DBUnZvoQrteON2
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 5100 is-4ES66.tmp 2556 SplitFiles123.exe 384 VYeiVoDNyxj.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 SplitFiles123.exe -
Loads dropped DLL 1 IoCs
pid Process 5100 is-4ES66.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-VR51M.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-4ES66.tmp File created C:\Program Files (x86)\Split Files\language\is-MBUVK.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\language\is-D24U0.tmp is-4ES66.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-4ES66.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe is-4ES66.tmp File created C:\Program Files (x86)\Split Files\is-M7P2L.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\language\is-OLSMC.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\language\is-NRMSP.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\language\is-4ALL3.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\is-MHITB.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\language\is-M665F.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\is-28G5G.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\is-FUQH8.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\is-3DHB7.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\language\is-UMM4M.tmp is-4ES66.tmp File created C:\Program Files (x86)\Split Files\language\is-0RC7Q.tmp is-4ES66.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 1964 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2556 SplitFiles123.exe 2556 SplitFiles123.exe 2556 SplitFiles123.exe 2556 SplitFiles123.exe 2556 SplitFiles123.exe 2556 SplitFiles123.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1964 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 716 wrote to memory of 5100 716 file.exe 83 PID 716 wrote to memory of 5100 716 file.exe 83 PID 716 wrote to memory of 5100 716 file.exe 83 PID 5100 wrote to memory of 2556 5100 is-4ES66.tmp 84 PID 5100 wrote to memory of 2556 5100 is-4ES66.tmp 84 PID 5100 wrote to memory of 2556 5100 is-4ES66.tmp 84 PID 2556 wrote to memory of 384 2556 SplitFiles123.exe 85 PID 2556 wrote to memory of 384 2556 SplitFiles123.exe 85 PID 2556 wrote to memory of 384 2556 SplitFiles123.exe 85 PID 2556 wrote to memory of 1428 2556 SplitFiles123.exe 93 PID 2556 wrote to memory of 1428 2556 SplitFiles123.exe 93 PID 2556 wrote to memory of 1428 2556 SplitFiles123.exe 93 PID 1428 wrote to memory of 1964 1428 cmd.exe 95 PID 1428 wrote to memory of 1964 1428 cmd.exe 95 PID 1428 wrote to memory of 1964 1428 cmd.exe 95
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:716 -
C:\Users\Admin\AppData\Local\Temp\is-P1IBU.tmp\is-4ES66.tmp"C:\Users\Admin\AppData\Local\Temp\is-P1IBU.tmp\is-4ES66.tmp" /SL4 $501EC "C:\Users\Admin\AppData\Local\Temp\file.exe" 1582727 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:5100 -
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:2556 -
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\VYeiVoDNyxj.exe4⤵
- Executes dropped EXE
PID:384
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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:1428 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles123.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1964
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
3.1MB
MD570a6c9f69b93a2ec88fbf2e9ac4b6227
SHA17ca07d45ffc70792403390b0b34811d072decbfd
SHA256b8d292eb95a313d413656731e928b0d88a6ed59c05b8a339e992fdd898d39f20
SHA51270b0f45601862a53684875aedf3f5d2e58ee00a63cd49782764a59c6ef9bd8157246c7f68608584f5430b927c6b845e3c02ba130b70bbc4b3c677f7d5625849c
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Filesize
3.1MB
MD570a6c9f69b93a2ec88fbf2e9ac4b6227
SHA17ca07d45ffc70792403390b0b34811d072decbfd
SHA256b8d292eb95a313d413656731e928b0d88a6ed59c05b8a339e992fdd898d39f20
SHA51270b0f45601862a53684875aedf3f5d2e58ee00a63cd49782764a59c6ef9bd8157246c7f68608584f5430b927c6b845e3c02ba130b70bbc4b3c677f7d5625849c
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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