Analysis
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max time kernel
91s -
max time network
139s -
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, 05:27
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
8a7149dd82ac1f741398db9a9946fcf3
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SHA1
d549991889b9c02bbd552a7d048adf6d3e528602
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SHA256
87ac476c5f03c8b356e9341be8ae831b7fbcb96b15aafd130d1cdaa6b525f2e9
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SHA512
5d2668530f325c7d5c5050ba7e288469c009aa027856fc293f34f890852c6d167494a3b3aceeb0b439bf63c4dc6ab0dd433e3fd91674c76ee843f68d12bc04c0
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SSDEEP
24576:ypni3J92oBjN8dwq6FFvXH+IJ1cdAn6cE2ztEnWDwKrIAkepEtscBrtgETp3c:wi3J8/dwqenwdAnxE2G0KuEtxBrtgENM
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4956 is-BF3NP.tmp 2240 SplitFiles124.exe 2680 Xx4rVgZ.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 4956 is-BF3NP.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-583F9.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\is-7TF5Q.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\is-47RVN.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\language\is-8DES0.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\language\is-7GQ8K.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\language\is-TJRNT.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\language\is-TG9BD.tmp is-BF3NP.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-BF3NP.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles124.exe is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\language\is-AVC3G.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\language\is-0GAFM.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\is-QEM20.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\is-48OKI.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\is-VQUAS.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\language\is-ICF33.tmp is-BF3NP.tmp File created C:\Program Files (x86)\Split Files\language\is-BNAS9.tmp is-BF3NP.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 3996 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2240 SplitFiles124.exe 2240 SplitFiles124.exe 2240 SplitFiles124.exe 2240 SplitFiles124.exe 2240 SplitFiles124.exe 2240 SplitFiles124.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3996 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1768 wrote to memory of 4956 1768 file.exe 79 PID 1768 wrote to memory of 4956 1768 file.exe 79 PID 1768 wrote to memory of 4956 1768 file.exe 79 PID 4956 wrote to memory of 2240 4956 is-BF3NP.tmp 80 PID 4956 wrote to memory of 2240 4956 is-BF3NP.tmp 80 PID 4956 wrote to memory of 2240 4956 is-BF3NP.tmp 80 PID 2240 wrote to memory of 2680 2240 SplitFiles124.exe 81 PID 2240 wrote to memory of 2680 2240 SplitFiles124.exe 81 PID 2240 wrote to memory of 2680 2240 SplitFiles124.exe 81 PID 2240 wrote to memory of 4876 2240 SplitFiles124.exe 87 PID 2240 wrote to memory of 4876 2240 SplitFiles124.exe 87 PID 2240 wrote to memory of 4876 2240 SplitFiles124.exe 87 PID 4876 wrote to memory of 3996 4876 cmd.exe 89 PID 4876 wrote to memory of 3996 4876 cmd.exe 89 PID 4876 wrote to memory of 3996 4876 cmd.exe 89
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:1768 -
C:\Users\Admin\AppData\Local\Temp\is-5HVQD.tmp\is-BF3NP.tmp"C:\Users\Admin\AppData\Local\Temp\is-5HVQD.tmp\is-BF3NP.tmp" /SL4 $90042 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1586809 967682⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4956 -
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:2240 -
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\Xx4rVgZ.exe4⤵
- Executes dropped EXE
PID:2680
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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:4876 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles124.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3996
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD5b0b6912809836734eb4b65dc0140ab28
SHA1c3eb5837634c43de48b395e60739b69e1cd41acd
SHA256a8dbad0702454157d61eaca2941ddd34625e56c9eb60f62d7509bc752a2108fb
SHA51263805ba65062752226cfb3ca4d1a028e6e940fd4e02c6bfb9d8c327475ee1be823276aed766b010cf467f4280f618e5ead1cf9466eb692af3fd2399efde1c451
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Filesize
3.1MB
MD5b0b6912809836734eb4b65dc0140ab28
SHA1c3eb5837634c43de48b395e60739b69e1cd41acd
SHA256a8dbad0702454157d61eaca2941ddd34625e56c9eb60f62d7509bc752a2108fb
SHA51263805ba65062752226cfb3ca4d1a028e6e940fd4e02c6bfb9d8c327475ee1be823276aed766b010cf467f4280f618e5ead1cf9466eb692af3fd2399efde1c451
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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
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