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, 00:03
Static task
static1
Behavioral task
behavioral1
Sample
9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe
Resource
win7-20220812-en
General
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Target
9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe
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Size
1.6MB
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MD5
3a42f5e64bbc57ff87da632ed703dd6e
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SHA1
056ed9f32cb796fe44aa7f62ed044ddce2eb0d9f
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SHA256
9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b
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SHA512
77ef719cfb6ee073c55491f35683905e45ddd5b365ca955cb459b702cbba52ab2f7fac84bb0666cac2592064ecb9fadbb60c6a32aa5866584b29c6ce7c6110e2
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SSDEEP
24576:tizCqBHw58pcC4aY6tXZIzfFOSZ8Mu1crXz2mz5MdvV3Y9n+6QPY8ygZIY7eCLxc:GxQU/yzdh8Mu1cRVMd93jAwNeViY
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4124 is-SMAB3.tmp 740 SplitFiles.exe 4044 umgqiCkt6D.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 4124 is-SMAB3.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-97HHC.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\language\is-F4JFQ.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\language\is-DUBIQ.tmp is-SMAB3.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles.exe is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\is-6D6MB.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\language\is-UQRRP.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\is-URA1S.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\language\is-K3O49.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\language\is-FH50G.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\language\is-PTKA6.tmp is-SMAB3.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\is-9GAEV.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\language\is-AR47Q.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\language\is-HNVE7.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\is-GRCSH.tmp is-SMAB3.tmp File created C:\Program Files (x86)\Split Files\is-82HN4.tmp is-SMAB3.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 4680 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 740 SplitFiles.exe 740 SplitFiles.exe 740 SplitFiles.exe 740 SplitFiles.exe 740 SplitFiles.exe 740 SplitFiles.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4680 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4160 wrote to memory of 4124 4160 9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe 81 PID 4160 wrote to memory of 4124 4160 9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe 81 PID 4160 wrote to memory of 4124 4160 9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe 81 PID 4124 wrote to memory of 740 4124 is-SMAB3.tmp 82 PID 4124 wrote to memory of 740 4124 is-SMAB3.tmp 82 PID 4124 wrote to memory of 740 4124 is-SMAB3.tmp 82 PID 740 wrote to memory of 4044 740 SplitFiles.exe 85 PID 740 wrote to memory of 4044 740 SplitFiles.exe 85 PID 740 wrote to memory of 4044 740 SplitFiles.exe 85 PID 740 wrote to memory of 4620 740 SplitFiles.exe 91 PID 740 wrote to memory of 4620 740 SplitFiles.exe 91 PID 740 wrote to memory of 4620 740 SplitFiles.exe 91 PID 4620 wrote to memory of 4680 4620 cmd.exe 93 PID 4620 wrote to memory of 4680 4620 cmd.exe 93 PID 4620 wrote to memory of 4680 4620 cmd.exe 93
Processes
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C:\Users\Admin\AppData\Local\Temp\9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe"C:\Users\Admin\AppData\Local\Temp\9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:4160 -
C:\Users\Admin\AppData\Local\Temp\is-LI29U.tmp\is-SMAB3.tmp"C:\Users\Admin\AppData\Local\Temp\is-LI29U.tmp\is-SMAB3.tmp" /SL4 $701B0 "C:\Users\Admin\AppData\Local\Temp\9803d185daf6ff0171a453af0d44104903efc5233b2cbdd5c1e889f4fd692b8b.exe" 1490381 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4124 -
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 use of WriteProcessMemory
PID:740 -
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\umgqiCkt6D.exe4⤵
- Executes dropped EXE
PID:4044
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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:4620 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4680
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
3.0MB
MD514d62d38818af1514ca0314f4d08bc7d
SHA1cc265735ceb77ed4c5a17a00f7225226aa2ef649
SHA256b22227a24effb1409b1724dd067be0b1e0c9c478dff0bd2c426e2b99c81ec75e
SHA5128e8ed042acab10e05e0723faa15dec8918de4245387327ce758eda7a1ca4a1fbd826e86af7d9bed5a600164427a446e355a1f2fc95672768a1f05c5a96ecab9c
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Filesize
3.0MB
MD514d62d38818af1514ca0314f4d08bc7d
SHA1cc265735ceb77ed4c5a17a00f7225226aa2ef649
SHA256b22227a24effb1409b1724dd067be0b1e0c9c478dff0bd2c426e2b99c81ec75e
SHA5128e8ed042acab10e05e0723faa15dec8918de4245387327ce758eda7a1ca4a1fbd826e86af7d9bed5a600164427a446e355a1f2fc95672768a1f05c5a96ecab9c
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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
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