Analysis
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max time kernel
91s -
max time network
127s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
23/12/2022, 06:31
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
e4d1383db2a73666588655270cb32f79
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SHA1
0d428b02b6f00327148700c909aa36cdad93fcd1
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SHA256
d7e30ad076b20ecd62723437ddbacbf4e0bf837a7bd0e0aaeb3ace2956e9d13f
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SHA512
18d29f8aeee8572be1131edd9356c722fe37c6b8086d45f408a405e60e574771c7bf1fac16dcaf9c7c9b8addf8bb48ad25f9a8c0707d92e1a314a4d437b7bca1
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SSDEEP
49152:bUqow54+VTwzcT2zj0RZ7l1CPhmt2cWP7p38:bUqtW+dwzE2kRL1CPUGd8
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1128 is-M9TB4.tmp 3632 SplitFiles118.exe 2288 tL0lRS8oN.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation SplitFiles118.exe -
Loads dropped DLL 1 IoCs
pid Process 1128 is-M9TB4.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-H7GSA.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\language\is-22KC0.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\is-IPN14.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\is-FQ0FH.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\language\is-MD1BM.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\is-0B97R.tmp is-M9TB4.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\language\is-64NQC.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\language\is-K1FPE.tmp is-M9TB4.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles118.exe is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\language\is-DCPSL.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\language\is-JN1R6.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\language\is-3IFC6.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\language\is-5F1VG.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\language\is-0JSGE.tmp is-M9TB4.tmp File created C:\Program Files (x86)\Split Files\is-33TF1.tmp is-M9TB4.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 4612 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3632 SplitFiles118.exe 3632 SplitFiles118.exe 3632 SplitFiles118.exe 3632 SplitFiles118.exe 3632 SplitFiles118.exe 3632 SplitFiles118.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4612 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4880 wrote to memory of 1128 4880 file.exe 82 PID 4880 wrote to memory of 1128 4880 file.exe 82 PID 4880 wrote to memory of 1128 4880 file.exe 82 PID 1128 wrote to memory of 3632 1128 is-M9TB4.tmp 83 PID 1128 wrote to memory of 3632 1128 is-M9TB4.tmp 83 PID 1128 wrote to memory of 3632 1128 is-M9TB4.tmp 83 PID 3632 wrote to memory of 2288 3632 SplitFiles118.exe 84 PID 3632 wrote to memory of 2288 3632 SplitFiles118.exe 84 PID 3632 wrote to memory of 2288 3632 SplitFiles118.exe 84 PID 3632 wrote to memory of 1132 3632 SplitFiles118.exe 92 PID 3632 wrote to memory of 1132 3632 SplitFiles118.exe 92 PID 3632 wrote to memory of 1132 3632 SplitFiles118.exe 92 PID 1132 wrote to memory of 4612 1132 cmd.exe 94 PID 1132 wrote to memory of 4612 1132 cmd.exe 94 PID 1132 wrote to memory of 4612 1132 cmd.exe 94
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:4880 -
C:\Users\Admin\AppData\Local\Temp\is-12I4J.tmp\is-M9TB4.tmp"C:\Users\Admin\AppData\Local\Temp\is-12I4J.tmp\is-M9TB4.tmp" /SL4 $40040 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1661981 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1128 -
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:3632 -
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\tL0lRS8oN.exe4⤵
- Executes dropped EXE
PID:2288
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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:1132 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles118.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4612
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD555911d24ccf14f616af8c42be3c30cea
SHA105d5a813e5a626beaf066db624cde79257f1105f
SHA256eb83398b7cbf961d9aa67bb727d71c9571aeeb3d4b451dde75c6a7f99a85923c
SHA5126c7419e0fed4a4ccd85656c8e4ae1aaa05baa07337ddb56a47ec76f72571f743d8c1b7ee64069c9db47c59203870b9687f54b3df6990c800294e740b8558da92
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Filesize
3.1MB
MD555911d24ccf14f616af8c42be3c30cea
SHA105d5a813e5a626beaf066db624cde79257f1105f
SHA256eb83398b7cbf961d9aa67bb727d71c9571aeeb3d4b451dde75c6a7f99a85923c
SHA5126c7419e0fed4a4ccd85656c8e4ae1aaa05baa07337ddb56a47ec76f72571f743d8c1b7ee64069c9db47c59203870b9687f54b3df6990c800294e740b8558da92
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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
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