Analysis
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max time kernel
144s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
23/12/2022, 00:01
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
1.8MB
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MD5
ccbc2d276c98b4e8e00df2c7f5fddacf
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SHA1
a82547c434dc96a9141e00f649b8c4182927dfd3
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SHA256
70fd562c3799de01819a13203ac98248830960128be02c912cb4498171ea0c87
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SHA512
636fecb7754263a2c6e3ceae4d389bd9e20e27feec5c0833ae754c24e242943415765c0d8b0554301bf9cac49c53587342ecab43b02ce7c0048dbca364e5ab3b
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SSDEEP
49152:vfnRoVOQ8Ns0NnWchIjZlCLf+3YvKWWP7p3h:vfnRo4XHRWblzoyWGdh
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4772 is-NM4S5.tmp 4108 SplitFiles117.exe 1560 vyRuMhHIyg.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation SplitFiles117.exe -
Loads dropped DLL 1 IoCs
pid Process 4772 is-NM4S5.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-55CBI.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\is-L8TKE.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\is-R5FK4.tmp is-NM4S5.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles117.exe is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\language\is-1NVUC.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\language\is-8TIER.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\language\is-86U5E.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\language\is-HCDOD.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\language\is-MPBSH.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\is-65RIO.tmp is-NM4S5.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\language\is-5SUTF.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\language\is-4B5I7.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\language\is-4BI83.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\is-4G501.tmp is-NM4S5.tmp File created C:\Program Files (x86)\Split Files\is-H0B5D.tmp is-NM4S5.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 4680 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4108 SplitFiles117.exe 4108 SplitFiles117.exe 4108 SplitFiles117.exe 4108 SplitFiles117.exe 4108 SplitFiles117.exe 4108 SplitFiles117.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4680 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4900 wrote to memory of 4772 4900 file.exe 80 PID 4900 wrote to memory of 4772 4900 file.exe 80 PID 4900 wrote to memory of 4772 4900 file.exe 80 PID 4772 wrote to memory of 4108 4772 is-NM4S5.tmp 81 PID 4772 wrote to memory of 4108 4772 is-NM4S5.tmp 81 PID 4772 wrote to memory of 4108 4772 is-NM4S5.tmp 81 PID 4108 wrote to memory of 1560 4108 SplitFiles117.exe 82 PID 4108 wrote to memory of 1560 4108 SplitFiles117.exe 82 PID 4108 wrote to memory of 1560 4108 SplitFiles117.exe 82 PID 4108 wrote to memory of 1468 4108 SplitFiles117.exe 90 PID 4108 wrote to memory of 1468 4108 SplitFiles117.exe 90 PID 4108 wrote to memory of 1468 4108 SplitFiles117.exe 90 PID 1468 wrote to memory of 4680 1468 cmd.exe 92 PID 1468 wrote to memory of 4680 1468 cmd.exe 92 PID 1468 wrote to memory of 4680 1468 cmd.exe 92
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:4900 -
C:\Users\Admin\AppData\Local\Temp\is-JSCDJ.tmp\is-NM4S5.tmp"C:\Users\Admin\AppData\Local\Temp\is-JSCDJ.tmp\is-NM4S5.tmp" /SL4 $8003A "C:\Users\Admin\AppData\Local\Temp\file.exe" 1601490 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4772 -
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:4108 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\vyRuMhHIyg.exe4⤵
- Executes dropped EXE
PID:1560
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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:1468 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles117.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4680
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.2MB
MD5962bf11808a1968d7a3a43c4c7a7d844
SHA1235d25e83f4cd3c42ea7fc5de70f0d44ec02ad95
SHA2565bb373843002bd1141e3a9bedae99de9f26001f6ad8e8d994d7b62e6c0ab1dca
SHA5121c241c6a84fa6b6bd365117f61d659165addd650469af7e3fdb55393add5ee6f0c748595a0d2229bff2716c4e84b0925df74bdbd4a82e789305e7429c96738c6
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Filesize
3.2MB
MD5962bf11808a1968d7a3a43c4c7a7d844
SHA1235d25e83f4cd3c42ea7fc5de70f0d44ec02ad95
SHA2565bb373843002bd1141e3a9bedae99de9f26001f6ad8e8d994d7b62e6c0ab1dca
SHA5121c241c6a84fa6b6bd365117f61d659165addd650469af7e3fdb55393add5ee6f0c748595a0d2229bff2716c4e84b0925df74bdbd4a82e789305e7429c96738c6
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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
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c