Analysis
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max time kernel
90s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
23/12/2022, 04:16
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
9b8c5e44d556c5de3bc582527fa8b0e9
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SHA1
2ddaa098c6a96bd5ea4dfd2ed9f2ad0dbe94d09c
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SHA256
5fb0cc9159d4069ee72ffe06a48057e68fd492c34e7c5ba269c6292b664ea6ee
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SHA512
afcd896a20ca2087f016045f828e6663d816d7764207b46175bb11662f8026e0de58326173584c253be406b8d30f8d69dcfb02b1d9d1731315c51cc70de00602
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SSDEEP
49152:baT194VhHf7ma0NbwtjYh1i7flo3FeWP7p3A:baoLHf5t0Hi7t9GdA
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1980 is-8F3NO.tmp 4356 SplitFiles118.exe 3320 ahrIiwMCe.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation SplitFiles118.exe -
Loads dropped DLL 1 IoCs
pid Process 1980 is-8F3NO.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-0RK0I.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\is-JC92V.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\language\is-Q6JE9.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\language\is-VUJD3.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\language\is-3JH0U.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\is-TIC1J.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\is-CLHDO.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\language\is-5AO6B.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\language\is-3KAGL.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\is-ILPL9.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\language\is-CVPJ6.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\language\is-7P5F9.tmp is-8F3NO.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles118.exe is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\language\is-NRBGA.tmp is-8F3NO.tmp File created C:\Program Files (x86)\Split Files\is-6SIT9.tmp is-8F3NO.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-8F3NO.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 2840 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4356 SplitFiles118.exe 4356 SplitFiles118.exe 4356 SplitFiles118.exe 4356 SplitFiles118.exe 4356 SplitFiles118.exe 4356 SplitFiles118.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2840 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 8 wrote to memory of 1980 8 file.exe 81 PID 8 wrote to memory of 1980 8 file.exe 81 PID 8 wrote to memory of 1980 8 file.exe 81 PID 1980 wrote to memory of 4356 1980 is-8F3NO.tmp 82 PID 1980 wrote to memory of 4356 1980 is-8F3NO.tmp 82 PID 1980 wrote to memory of 4356 1980 is-8F3NO.tmp 82 PID 4356 wrote to memory of 3320 4356 SplitFiles118.exe 85 PID 4356 wrote to memory of 3320 4356 SplitFiles118.exe 85 PID 4356 wrote to memory of 3320 4356 SplitFiles118.exe 85 PID 4356 wrote to memory of 3792 4356 SplitFiles118.exe 91 PID 4356 wrote to memory of 3792 4356 SplitFiles118.exe 91 PID 4356 wrote to memory of 3792 4356 SplitFiles118.exe 91 PID 3792 wrote to memory of 2840 3792 cmd.exe 93 PID 3792 wrote to memory of 2840 3792 cmd.exe 93 PID 3792 wrote to memory of 2840 3792 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:8 -
C:\Users\Admin\AppData\Local\Temp\is-MKNAC.tmp\is-8F3NO.tmp"C:\Users\Admin\AppData\Local\Temp\is-MKNAC.tmp\is-8F3NO.tmp" /SL4 $701B0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1590697 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1980 -
C:\Program Files (x86)\Split Files\SplitFiles118.exe"C:\Program Files (x86)\Split Files\SplitFiles118.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4356 -
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\ahrIiwMCe.exe4⤵
- Executes dropped EXE
PID:3320
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles118.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles118.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:3792 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles118.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2840
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD5d83958c62514a4d381b4ffaee694c017
SHA14563829c2978f7609df887fafa92bc6a22305710
SHA25672939946e021a3c20177f7073bdd7100254c15af3c94725b2fe10fe701398421
SHA512edb59002f117f6dd1b8d817ff76aab7510b82b5a797ff87dff90c9a9cd6d94c0ad17b87e401177336df4aa8744aa525778c14d8a9e184c103ad10a81466d7238
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Filesize
3.1MB
MD5d83958c62514a4d381b4ffaee694c017
SHA14563829c2978f7609df887fafa92bc6a22305710
SHA25672939946e021a3c20177f7073bdd7100254c15af3c94725b2fe10fe701398421
SHA512edb59002f117f6dd1b8d817ff76aab7510b82b5a797ff87dff90c9a9cd6d94c0ad17b87e401177336df4aa8744aa525778c14d8a9e184c103ad10a81466d7238
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
723KB
MD5703b4da86c2d38881230d26bc1051cb2
SHA113b9e7582e94cb6e4f703bc08a28c53cdc003019
SHA25690b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89
SHA512e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b
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Filesize
723KB
MD5703b4da86c2d38881230d26bc1051cb2
SHA113b9e7582e94cb6e4f703bc08a28c53cdc003019
SHA25690b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89
SHA512e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c