Analysis
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max time kernel
92s -
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
28/12/2022, 23:18
Static task
static1
Behavioral task
behavioral1
Sample
7a9e33c5307748d5eda1d300f55a0d5efa045edce88bf6d4e2806393f65580b8.exe
Resource
win7-20220901-en
General
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Target
7a9e33c5307748d5eda1d300f55a0d5efa045edce88bf6d4e2806393f65580b8.exe
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Size
2.1MB
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MD5
c9047d22ee6551b3d663d7084f3d1ed1
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SHA1
b9c1320eff08005e55334ad374260d8cd3d787ca
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SHA256
7a9e33c5307748d5eda1d300f55a0d5efa045edce88bf6d4e2806393f65580b8
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SHA512
504157f7f4d0d5fbc029a491f87a49f24c3c5f45ce7fb32ecb8fce5451912c84b06cb47f3ed0741148b0df6a362c2828dbf7fb948cc5f94622f10f74c9b49c3d
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SSDEEP
49152:2ivLILyzK1IFS97Cyy1W1YPYkakGsbvjCYef0C6sBCu319UDXKY:2iv8pK8eyy1ZPZakXyOs0
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 5068 is-4IQFU.tmp 4912 SplitFiles123.exe 4472 4MEfE6KBD7red.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 SplitFiles123.exe -
Loads dropped DLL 1 IoCs
pid Process 5068 is-4IQFU.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\is-R1GQF.tmp is-4IQFU.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-4IQFU.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\language\is-59KR4.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\is-SM6N0.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\is-GRKI2.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\is-HCQJQ.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\language\is-IIDGH.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\language\is-HIA5S.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\language\is-FNF9O.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\language\is-LJTMQ.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\language\is-KHDU6.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\language\is-E7Q27.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\language\is-CKA4G.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\language\is-7CIQC.tmp is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-4IQFU.tmp File created C:\Program Files (x86)\Split Files\is-L7VFP.tmp is-4IQFU.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 4408 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4912 SplitFiles123.exe 4912 SplitFiles123.exe 4912 SplitFiles123.exe 4912 SplitFiles123.exe 4912 SplitFiles123.exe 4912 SplitFiles123.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4408 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1932 wrote to memory of 5068 1932 7a9e33c5307748d5eda1d300f55a0d5efa045edce88bf6d4e2806393f65580b8.exe 80 PID 1932 wrote to memory of 5068 1932 7a9e33c5307748d5eda1d300f55a0d5efa045edce88bf6d4e2806393f65580b8.exe 80 PID 1932 wrote to memory of 5068 1932 7a9e33c5307748d5eda1d300f55a0d5efa045edce88bf6d4e2806393f65580b8.exe 80 PID 5068 wrote to memory of 4912 5068 is-4IQFU.tmp 81 PID 5068 wrote to memory of 4912 5068 is-4IQFU.tmp 81 PID 5068 wrote to memory of 4912 5068 is-4IQFU.tmp 81 PID 4912 wrote to memory of 4472 4912 SplitFiles123.exe 82 PID 4912 wrote to memory of 4472 4912 SplitFiles123.exe 82 PID 4912 wrote to memory of 4472 4912 SplitFiles123.exe 82 PID 4912 wrote to memory of 2596 4912 SplitFiles123.exe 84 PID 4912 wrote to memory of 2596 4912 SplitFiles123.exe 84 PID 4912 wrote to memory of 2596 4912 SplitFiles123.exe 84 PID 2596 wrote to memory of 4408 2596 cmd.exe 86 PID 2596 wrote to memory of 4408 2596 cmd.exe 86 PID 2596 wrote to memory of 4408 2596 cmd.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\7a9e33c5307748d5eda1d300f55a0d5efa045edce88bf6d4e2806393f65580b8.exe"C:\Users\Admin\AppData\Local\Temp\7a9e33c5307748d5eda1d300f55a0d5efa045edce88bf6d4e2806393f65580b8.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:1932 -
C:\Users\Admin\AppData\Local\Temp\is-TDBU2.tmp\is-4IQFU.tmp"C:\Users\Admin\AppData\Local\Temp\is-TDBU2.tmp\is-4IQFU.tmp" /SL4 $9006C "C:\Users\Admin\AppData\Local\Temp\7a9e33c5307748d5eda1d300f55a0d5efa045edce88bf6d4e2806393f65580b8.exe" 1837330 2176002⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:5068 -
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:4912 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\4MEfE6KBD7red.exe4⤵
- Executes dropped EXE
PID:4472
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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:2596 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles123.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4408
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.2MB
MD5ed6b7e901e1bb5d2f621de3302069796
SHA1c9ef00f91c1b3d1115f3258a9367b1b578594289
SHA256cfca78bd05c37a53f833dbce3f17313d813b3986e56265f37ce1c2a5f175d878
SHA512fd3fc1db8e3e1ceb7bf8a4c7de26cd3dc880543735f8a591248f6a2a608f2dccb67c858cec8a973aecd96355d0d37ee646bac592106066471ee90f7729eea91e
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Filesize
3.2MB
MD5ed6b7e901e1bb5d2f621de3302069796
SHA1c9ef00f91c1b3d1115f3258a9367b1b578594289
SHA256cfca78bd05c37a53f833dbce3f17313d813b3986e56265f37ce1c2a5f175d878
SHA512fd3fc1db8e3e1ceb7bf8a4c7de26cd3dc880543735f8a591248f6a2a608f2dccb67c858cec8a973aecd96355d0d37ee646bac592106066471ee90f7729eea91e
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
806KB
MD54f3db9263ab998737f14cfb0cc7da686
SHA11f3947a6b5c900f28a93abb7a097aea5efa76f58
SHA256f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa
SHA51260d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d
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Filesize
806KB
MD54f3db9263ab998737f14cfb0cc7da686
SHA11f3947a6b5c900f28a93abb7a097aea5efa76f58
SHA256f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa
SHA51260d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c