Analysis
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max time kernel
91s -
max time network
150s -
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, 06:44
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
751e38a4b2397b818c0b52aefef8632e
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SHA1
db3a0abb62153523aa5bdd276741c70a594bb31e
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SHA256
46bfe22fa00aba9e58f6e7afb790b0a7ad7c31e57260fbc499162648375a39e5
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SHA512
fd70ce3fba25c076c59b8be9802f9cd813ea9bb109c707653d609f54ed832810a363809d14c4d0005e658399229d34e1dba58293409929a0e21a800084176a91
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SSDEEP
49152:0i7w/Qf4GVx1lnA8Ipzsj5AAME6lMNDf2Vp5FZX+qm9DnlNX:0i7w/lYln+wjyeNDf2VFJ14nD
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 3460 is-3CMA3.tmp 3932 SplitFiles124.exe 816 s7FDTDkSx3PTx.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation SplitFiles124.exe -
Loads dropped DLL 1 IoCs
pid Process 3460 is-3CMA3.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-IC9QO.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\language\is-EE4NB.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\language\is-FB0EA.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\language\is-S6AMG.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\language\is-NDFOG.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\language\is-SU40C.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\is-FQ8HT.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\is-7LF1E.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\language\is-VD3E4.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\language\is-K2284.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\is-GF33S.tmp is-3CMA3.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles124.exe is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\language\is-2R43L.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\is-EHUG3.tmp is-3CMA3.tmp File created C:\Program Files (x86)\Split Files\is-FNCU6.tmp is-3CMA3.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-3CMA3.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 2204 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3932 SplitFiles124.exe 3932 SplitFiles124.exe 3932 SplitFiles124.exe 3932 SplitFiles124.exe 3932 SplitFiles124.exe 3932 SplitFiles124.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2204 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 972 wrote to memory of 3460 972 file.exe 80 PID 972 wrote to memory of 3460 972 file.exe 80 PID 972 wrote to memory of 3460 972 file.exe 80 PID 3460 wrote to memory of 3932 3460 is-3CMA3.tmp 81 PID 3460 wrote to memory of 3932 3460 is-3CMA3.tmp 81 PID 3460 wrote to memory of 3932 3460 is-3CMA3.tmp 81 PID 3932 wrote to memory of 816 3932 SplitFiles124.exe 82 PID 3932 wrote to memory of 816 3932 SplitFiles124.exe 82 PID 3932 wrote to memory of 816 3932 SplitFiles124.exe 82 PID 3932 wrote to memory of 1996 3932 SplitFiles124.exe 91 PID 3932 wrote to memory of 1996 3932 SplitFiles124.exe 91 PID 3932 wrote to memory of 1996 3932 SplitFiles124.exe 91 PID 1996 wrote to memory of 2204 1996 cmd.exe 93 PID 1996 wrote to memory of 2204 1996 cmd.exe 93 PID 1996 wrote to memory of 2204 1996 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:972 -
C:\Users\Admin\AppData\Local\Temp\is-POVCE.tmp\is-3CMA3.tmp"C:\Users\Admin\AppData\Local\Temp\is-POVCE.tmp\is-3CMA3.tmp" /SL4 $D0050 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1561047 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3460 -
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:3932 -
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\s7FDTDkSx3PTx.exe4⤵
- Executes dropped EXE
PID:816
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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:1996 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles124.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2204
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD5d71e2b4f365eb8006ebc5b45c0af5abb
SHA1498e4e9d17932927c85e24562e67cce3ceba171a
SHA256bc301ea0de2cec56ac9be6dcaf9dca65f1d430caeb111731524ef39e7af5a73e
SHA512981a1af6b632738f4a9de8a373320eaf879a92ea6ec169981ca8b78557a03127623fa03c141586aea7e377eca3ab82c4ecedfcfd9a2188a2e17011f4f7c6f982
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Filesize
3.1MB
MD5d71e2b4f365eb8006ebc5b45c0af5abb
SHA1498e4e9d17932927c85e24562e67cce3ceba171a
SHA256bc301ea0de2cec56ac9be6dcaf9dca65f1d430caeb111731524ef39e7af5a73e
SHA512981a1af6b632738f4a9de8a373320eaf879a92ea6ec169981ca8b78557a03127623fa03c141586aea7e377eca3ab82c4ecedfcfd9a2188a2e17011f4f7c6f982
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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