Analysis
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max time kernel
91s -
max time network
129s -
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, 03:17
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
2.0MB
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MD5
24e5a78cf8e9d0e4f66d21920edce889
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SHA1
6a4afe76c8a36d6cd00b71842d78c9ee7033f1df
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SHA256
c27756b2d89d78d665ec7507ffacd7825f174dad2e69610f08a05cdfd8194868
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SHA512
aecd434351c6eedfe6b3900ce2eb04ebe27cdb8ce3eabe3330838957604079f9ca56db99eb263628af3b021a713b999b0733ac7bd2f8ddba1099af142fd3d186
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SSDEEP
49152:j1MIVklHN5IyvvCjkQVqTKWY20UWP7p30:j1M0kVFoLQfLGd0
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1200 is-8GRCL.tmp 2840 SplitFiles118.exe 232 3dWQw3ZLI.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 1200 is-8GRCL.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\unins000.dat is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\language\is-KNL55.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\is-ALF9N.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\is-CHI8E.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\language\is-LS39R.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\language\is-JSI86.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\language\is-URR4F.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\is-L8RBA.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\is-3IPF1.tmp is-8GRCL.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\is-66IBK.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\language\is-DM845.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\language\is-AC9JV.tmp is-8GRCL.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles118.exe is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\language\is-V0SKD.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\language\is-9IOHV.tmp is-8GRCL.tmp File created C:\Program Files (x86)\Split Files\language\is-NUH9B.tmp is-8GRCL.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 2192 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2840 SplitFiles118.exe 2840 SplitFiles118.exe 2840 SplitFiles118.exe 2840 SplitFiles118.exe 2840 SplitFiles118.exe 2840 SplitFiles118.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2192 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4404 wrote to memory of 1200 4404 file.exe 80 PID 4404 wrote to memory of 1200 4404 file.exe 80 PID 4404 wrote to memory of 1200 4404 file.exe 80 PID 1200 wrote to memory of 2840 1200 is-8GRCL.tmp 81 PID 1200 wrote to memory of 2840 1200 is-8GRCL.tmp 81 PID 1200 wrote to memory of 2840 1200 is-8GRCL.tmp 81 PID 2840 wrote to memory of 232 2840 SplitFiles118.exe 85 PID 2840 wrote to memory of 232 2840 SplitFiles118.exe 85 PID 2840 wrote to memory of 232 2840 SplitFiles118.exe 85 PID 2840 wrote to memory of 3772 2840 SplitFiles118.exe 90 PID 2840 wrote to memory of 3772 2840 SplitFiles118.exe 90 PID 2840 wrote to memory of 3772 2840 SplitFiles118.exe 90 PID 3772 wrote to memory of 2192 3772 cmd.exe 92 PID 3772 wrote to memory of 2192 3772 cmd.exe 92 PID 3772 wrote to memory of 2192 3772 cmd.exe 92
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:4404 -
C:\Users\Admin\AppData\Local\Temp\is-5H1D1.tmp\is-8GRCL.tmp"C:\Users\Admin\AppData\Local\Temp\is-5H1D1.tmp\is-8GRCL.tmp" /SL4 $B0170 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1791779 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1200 -
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:2840 -
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\3dWQw3ZLI.exe4⤵
- Executes dropped EXE
PID:232
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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:3772 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles118.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2192
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.3MB
MD5c7c087a7138c8e4911ae69f7cf6592d9
SHA18dbc2f9732aaa66f69a4b1f57ca20828eca908c3
SHA256d5132780c6f824d620e59c66c2bbb027b96e2728af13dc2221eb4ee044620a75
SHA512faffd8a3317013b0e78046fdccdbfdc4dcdbe3f60d73acaadee3403d5f0e87de9768b7b91cda327559dc02f8e594e8125f3c0a6dfe8b5bbbfd4d95df5040b1b9
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Filesize
3.3MB
MD5c7c087a7138c8e4911ae69f7cf6592d9
SHA18dbc2f9732aaa66f69a4b1f57ca20828eca908c3
SHA256d5132780c6f824d620e59c66c2bbb027b96e2728af13dc2221eb4ee044620a75
SHA512faffd8a3317013b0e78046fdccdbfdc4dcdbe3f60d73acaadee3403d5f0e87de9768b7b91cda327559dc02f8e594e8125f3c0a6dfe8b5bbbfd4d95df5040b1b9
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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