Analysis
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max time kernel
108s -
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
22/12/2022, 23:31
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
1.8MB
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MD5
33f661f1fbb9e71fe88d2a8f921ac6f1
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SHA1
cb0522b6879fbb6cb978a0f566c5468b905f3b5e
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SHA256
b0cefcdca903547afa59d7bc788e29a60778b8c3500e3aaccbc8d6cab2bbc2f7
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SHA512
c37ddba0ddec23c11ba4049d710e06338bdd8cc3f1f2b4fe03a519f6e2145104ec5ead44e88b0d5c074fa8fd120275e17da5cb83dcba2841045c76daa7e61a05
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SSDEEP
49152:D6ATLFyBnQo9EEWH0f8zOMEJUAKt/ibe9ldShUWP7p3f:D4Q1Of8zOgXpibWdShUGdf
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 2752 is-I3M1L.tmp 1548 SplitFiles117.exe 4980 w3QeUT6fKb2R.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 2752 is-I3M1L.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-LMLI2.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\language\is-BVV81.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\language\is-GKSMR.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\is-UI8H3.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\language\is-FGMJC.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\language\is-Q5V3C.tmp is-I3M1L.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-I3M1L.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles117.exe is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\is-7MOAV.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\is-SUFRN.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\language\is-NEPL3.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\language\is-Q1NIJ.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\language\is-G28PG.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\is-3825V.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\is-3I48O.tmp is-I3M1L.tmp File created C:\Program Files (x86)\Split Files\language\is-C6VD3.tmp is-I3M1L.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 1644 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1548 SplitFiles117.exe 1548 SplitFiles117.exe 1548 SplitFiles117.exe 1548 SplitFiles117.exe 1548 SplitFiles117.exe 1548 SplitFiles117.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1644 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1404 wrote to memory of 2752 1404 file.exe 79 PID 1404 wrote to memory of 2752 1404 file.exe 79 PID 1404 wrote to memory of 2752 1404 file.exe 79 PID 2752 wrote to memory of 1548 2752 is-I3M1L.tmp 80 PID 2752 wrote to memory of 1548 2752 is-I3M1L.tmp 80 PID 2752 wrote to memory of 1548 2752 is-I3M1L.tmp 80 PID 1548 wrote to memory of 4980 1548 SplitFiles117.exe 81 PID 1548 wrote to memory of 4980 1548 SplitFiles117.exe 81 PID 1548 wrote to memory of 4980 1548 SplitFiles117.exe 81 PID 1548 wrote to memory of 3772 1548 SplitFiles117.exe 89 PID 1548 wrote to memory of 3772 1548 SplitFiles117.exe 89 PID 1548 wrote to memory of 3772 1548 SplitFiles117.exe 89 PID 3772 wrote to memory of 1644 3772 cmd.exe 91 PID 3772 wrote to memory of 1644 3772 cmd.exe 91 PID 3772 wrote to memory of 1644 3772 cmd.exe 91
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:1404 -
C:\Users\Admin\AppData\Local\Temp\is-TU3Q0.tmp\is-I3M1L.tmp"C:\Users\Admin\AppData\Local\Temp\is-TU3Q0.tmp\is-I3M1L.tmp" /SL4 $701BC "C:\Users\Admin\AppData\Local\Temp\file.exe" 1682048 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2752 -
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:1548 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\w3QeUT6fKb2R.exe4⤵
- Executes dropped EXE
PID:4980
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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:3772 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles117.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1644
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.2MB
MD500e8b154e8fbaae5fa6f71d2a1b6e688
SHA15c97eb81ceea2f0dd999e9edb2cdaf0bf94ab41a
SHA256c3f83645bc8a0483b979d58b0860f447ffd36d501f00507c45a659c1ddea8a29
SHA5121cdbcaa2fcf0560d2ab1ddab3d93a5eb4aec0f35e9e09e06e8881e273a82173b8c8a215b40ea64f8a7660fee7ed7d1a081793333b0b99a80d805732fa87610c5
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Filesize
3.2MB
MD500e8b154e8fbaae5fa6f71d2a1b6e688
SHA15c97eb81ceea2f0dd999e9edb2cdaf0bf94ab41a
SHA256c3f83645bc8a0483b979d58b0860f447ffd36d501f00507c45a659c1ddea8a29
SHA5121cdbcaa2fcf0560d2ab1ddab3d93a5eb4aec0f35e9e09e06e8881e273a82173b8c8a215b40ea64f8a7660fee7ed7d1a081793333b0b99a80d805732fa87610c5
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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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
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c