Analysis
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max time kernel
91s -
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, 00:31
Static task
static1
Behavioral task
behavioral1
Sample
11636166097ac5a5700074e031416bf9b4ba944834977241f39beb7ae1b46e4e.exe
Resource
win7-20221111-en
General
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Target
11636166097ac5a5700074e031416bf9b4ba944834977241f39beb7ae1b46e4e.exe
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Size
1.7MB
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MD5
42b3076aac08e9dd6ead632c7c9595a2
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SHA1
8449e6e34200909ed474121c93849e0bfcef4c6c
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SHA256
11636166097ac5a5700074e031416bf9b4ba944834977241f39beb7ae1b46e4e
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SHA512
3d162346ef81a91c09e5444aa140733befad7587c8a452ddd699d2716d1704724be101b2735b880ae695ac4551179fbb505140053f7d69647c007e3c9f164271
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SSDEEP
49152:6JxZrErjlnvh+g56pYXt2+FGu7qn/K6X1NeVi6:6H9yjlvwGrXtL+/NUi6
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 3584 is-1CD2Q.tmp 4760 SplitFiles.exe 1684 nfbeAC.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 SplitFiles.exe -
Loads dropped DLL 1 IoCs
pid Process 3584 is-1CD2Q.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-C4Q72.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\language\is-7BUR9.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\is-NG3M5.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\is-VGQA6.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\is-C0V4M.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\is-SPHGN.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\is-0JJ4A.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\language\is-4P79B.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\language\is-CRUQE.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\language\is-MPB0T.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\language\is-RCT2D.tmp is-1CD2Q.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles.exe is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\language\is-FE5HI.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\language\is-DVTBV.tmp is-1CD2Q.tmp File created C:\Program Files (x86)\Split Files\language\is-BO7QG.tmp is-1CD2Q.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-1CD2Q.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 4152 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4760 SplitFiles.exe 4760 SplitFiles.exe 4760 SplitFiles.exe 4760 SplitFiles.exe 4760 SplitFiles.exe 4760 SplitFiles.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 4760 SplitFiles.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4152 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4336 wrote to memory of 3584 4336 11636166097ac5a5700074e031416bf9b4ba944834977241f39beb7ae1b46e4e.exe 80 PID 4336 wrote to memory of 3584 4336 11636166097ac5a5700074e031416bf9b4ba944834977241f39beb7ae1b46e4e.exe 80 PID 4336 wrote to memory of 3584 4336 11636166097ac5a5700074e031416bf9b4ba944834977241f39beb7ae1b46e4e.exe 80 PID 3584 wrote to memory of 4760 3584 is-1CD2Q.tmp 81 PID 3584 wrote to memory of 4760 3584 is-1CD2Q.tmp 81 PID 3584 wrote to memory of 4760 3584 is-1CD2Q.tmp 81 PID 4760 wrote to memory of 1684 4760 SplitFiles.exe 84 PID 4760 wrote to memory of 1684 4760 SplitFiles.exe 84 PID 4760 wrote to memory of 1684 4760 SplitFiles.exe 84 PID 4760 wrote to memory of 1988 4760 SplitFiles.exe 90 PID 4760 wrote to memory of 1988 4760 SplitFiles.exe 90 PID 4760 wrote to memory of 1988 4760 SplitFiles.exe 90 PID 1988 wrote to memory of 4152 1988 cmd.exe 92 PID 1988 wrote to memory of 4152 1988 cmd.exe 92 PID 1988 wrote to memory of 4152 1988 cmd.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\11636166097ac5a5700074e031416bf9b4ba944834977241f39beb7ae1b46e4e.exe"C:\Users\Admin\AppData\Local\Temp\11636166097ac5a5700074e031416bf9b4ba944834977241f39beb7ae1b46e4e.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:4336 -
C:\Users\Admin\AppData\Local\Temp\is-8UIOF.tmp\is-1CD2Q.tmp"C:\Users\Admin\AppData\Local\Temp\is-8UIOF.tmp\is-1CD2Q.tmp" /SL4 $9004E "C:\Users\Admin\AppData\Local\Temp\11636166097ac5a5700074e031416bf9b4ba944834977241f39beb7ae1b46e4e.exe" 1549880 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3584 -
C:\Program Files (x86)\Split Files\SplitFiles.exe"C:\Program Files (x86)\Split Files\SplitFiles.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:4760 -
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\nfbeAC.exe4⤵
- Executes dropped EXE
PID:1684
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:1988 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4152
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.0MB
MD57ffd60129c08fa01080aa09586bdfa17
SHA1e57b6f9930011ff507b7d23120d5fb819c270892
SHA2564c2df9cf721e117ae86decbdb7dbdd4c83db6fbf229b1c3413f8a780ae286926
SHA512bb9e21076263a0c512b2802240934c865cc15d01237f27c504848c8f68ff5afd8230f08114483e0b9ca0f3f234af22b14a32b8614d3cb72566605b06e0722e67
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Filesize
3.0MB
MD57ffd60129c08fa01080aa09586bdfa17
SHA1e57b6f9930011ff507b7d23120d5fb819c270892
SHA2564c2df9cf721e117ae86decbdb7dbdd4c83db6fbf229b1c3413f8a780ae286926
SHA512bb9e21076263a0c512b2802240934c865cc15d01237f27c504848c8f68ff5afd8230f08114483e0b9ca0f3f234af22b14a32b8614d3cb72566605b06e0722e67
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
643KB
MD585b94e72c3f2d2b5464e2aaf3c9e242a
SHA1ce7ccae5f50a990d059d59292d4a332979e162ba
SHA2561441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
SHA512c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
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Filesize
643KB
MD585b94e72c3f2d2b5464e2aaf3c9e242a
SHA1ce7ccae5f50a990d059d59292d4a332979e162ba
SHA2561441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
SHA512c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c