Analysis
- max time kernel
154s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system - submitted
29/10/2022, 00:33
Static task
static1
Behavioral task
behavioral1
Sample
6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe
Resource
win7-20220812-en
15 signatures
150 seconds
Behavioral task
behavioral2
Sample
6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe
Resource
win10v2004-20220812-en
10 signatures
150 seconds
General
- Target 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe
- Size 497KB
- Sample221029-awbegadff4
- SHA256 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7
- MD5 d6c276c413f1fe6213b92c21e8fb7085
- SHA1 2d991d11879b6ee17db772e6d3f4eeab41f30d30
- SHA512 1f9723277c594f12aba942566eb57b653ffe1837482bc37645e11e0042b0a3275e5984f66abb6b51e885964f446aabdd785ab80a4f0f9f93f803bd3c3fcba6f2
- SSDEEP 12288:I4/almoWQ9H+3n3yGVcRmrp8sfA1vIgMlfNn3jGv2/:NyhO9VcuisfA1vIVF3R/
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
- ISR Stealer payload 1 IoCs
resource yara_rule behavioral2/memory/5084-137-0x0000000000770000-0x00000000007B2000-memory.dmp family_isrstealer - Executes dropped EXE 3 IoCs
pid Process 1320 natsv.exe 820 dnsmon.exe 812 natsv.exe - Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation natsv.exe Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation dnsmon.exe - Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 3292 set thread context of 5084 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 88 PID 820 set thread context of 3328 820 dnsmon.exe 99 - Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe File created C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 1320 natsv.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 1320 natsv.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 1320 natsv.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 1320 natsv.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 1320 natsv.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 1320 natsv.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 1320 natsv.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 1320 natsv.exe 1320 natsv.exe 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe 812 natsv.exe 820 dnsmon.exe - Suspicious use of AdjustPrivilegeToken 6 IoCs
description pid Process Token: SeDebugPrivilege 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe Token: SeDebugPrivilege 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe Token: SeDebugPrivilege 1320 natsv.exe Token: SeDebugPrivilege 820 dnsmon.exe Token: SeDebugPrivilege 820 dnsmon.exe Token: SeDebugPrivilege 812 natsv.exe - Suspicious use of WriteProcessMemory 40 IoCs
description pid Process procid_target PID 3292 wrote to memory of 2064 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 86 PID 3292 wrote to memory of 2064 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 86 PID 3292 wrote to memory of 2064 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 86 PID 3292 wrote to memory of 5084 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 88 PID 3292 wrote to memory of 5084 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 88 PID 3292 wrote to memory of 5084 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 88 PID 3292 wrote to memory of 5084 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 88 PID 3292 wrote to memory of 5084 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 88 PID 3292 wrote to memory of 5084 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 88 PID 3292 wrote to memory of 5084 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 88 PID 3292 wrote to memory of 5084 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 88 PID 3292 wrote to memory of 5004 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 89 PID 3292 wrote to memory of 5004 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 89 PID 3292 wrote to memory of 5004 3292 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe 89 PID 5004 wrote to memory of 1320 5004 cmd.exe 91 PID 5004 wrote to memory of 1320 5004 cmd.exe 91 PID 5004 wrote to memory of 1320 5004 cmd.exe 91 PID 1320 wrote to memory of 1808 1320 natsv.exe 92 PID 1320 wrote to memory of 1808 1320 natsv.exe 92 PID 1320 wrote to memory of 1808 1320 natsv.exe 92 PID 1808 wrote to memory of 3608 1808 cmd.exe 94 PID 1808 wrote to memory of 3608 1808 cmd.exe 94 PID 1808 wrote to memory of 3608 1808 cmd.exe 94 PID 1320 wrote to memory of 820 1320 natsv.exe 97 PID 1320 wrote to memory of 820 1320 natsv.exe 97 PID 1320 wrote to memory of 820 1320 natsv.exe 97 PID 820 wrote to memory of 3328 820 dnsmon.exe 99 PID 820 wrote to memory of 3328 820 dnsmon.exe 99 PID 820 wrote to memory of 3328 820 dnsmon.exe 99 PID 820 wrote to memory of 3328 820 dnsmon.exe 99 PID 820 wrote to memory of 3328 820 dnsmon.exe 99 PID 820 wrote to memory of 3328 820 dnsmon.exe 99 PID 820 wrote to memory of 3328 820 dnsmon.exe 99 PID 820 wrote to memory of 3328 820 dnsmon.exe 99 PID 820 wrote to memory of 2040 820 dnsmon.exe 100 PID 820 wrote to memory of 2040 820 dnsmon.exe 100 PID 820 wrote to memory of 2040 820 dnsmon.exe 100 PID 2040 wrote to memory of 812 2040 cmd.exe 102 PID 2040 wrote to memory of 812 2040 cmd.exe 102 PID 2040 wrote to memory of 812 2040 cmd.exe 102
Processes
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C:\Users\Admin\AppData\Local\Temp\6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe"C:\Users\Admin\AppData\Local\Temp\6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3292 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c copy "C:\Users\Admin\AppData\Local\Temp\6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe"2⤵PID:2064
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"2⤵PID:5084
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:5004 -
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1320 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v "Load" /d "cmd /c C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe" /f4⤵
- Suspicious use of WriteProcessMemory
PID:1808 -
C:\Windows\SysWOW64\reg.exereg add "HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v "Load" /d "cmd /c C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe" /f5⤵PID:3608
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe"4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:820 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"5⤵PID:3328
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"5⤵
- Suspicious use of WriteProcessMemory
PID:2040 -
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe"6⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:812
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\natsv.exe.log
- Size 128B
- SHA256 e24033ceec97fd03402b03acaaabd1d1e378e83bb1683afbccac760e00f8ead5
- MD5 a5dcc7c9c08af7dddd82be5b036a4416
- SHA1 4f998ca1526d199e355ffb435bae111a2779b994
- SHA512 56035de734836c0c39f0b48641c51c26adb6e79c6c65e23ca96603f71c95b8673e2ef853146e87efc899dd1878d0bbc2c82d91fbf0fce81c552048e986f9bb5a
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe
- Size 497KB
- SHA256 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7
- MD5 d6c276c413f1fe6213b92c21e8fb7085
- SHA1 2d991d11879b6ee17db772e6d3f4eeab41f30d30
- SHA512 1f9723277c594f12aba942566eb57b653ffe1837482bc37645e11e0042b0a3275e5984f66abb6b51e885964f446aabdd785ab80a4f0f9f93f803bd3c3fcba6f2
- SSDEEP 12288:I4/almoWQ9H+3n3yGVcRmrp8sfA1vIgMlfNn3jGv2/:NyhO9VcuisfA1vIVF3R/
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\dnsmon.exe
- Size 497KB
- SHA256 6e540cf9eee4ad60a985bbaa05c31d20e96c33cde02ca2fdedc8893524894ad7
- MD5 d6c276c413f1fe6213b92c21e8fb7085
- SHA1 2d991d11879b6ee17db772e6d3f4eeab41f30d30
- SHA512 1f9723277c594f12aba942566eb57b653ffe1837482bc37645e11e0042b0a3275e5984f66abb6b51e885964f446aabdd785ab80a4f0f9f93f803bd3c3fcba6f2
- SSDEEP 12288:I4/almoWQ9H+3n3yGVcRmrp8sfA1vIgMlfNn3jGv2/:NyhO9VcuisfA1vIVF3R/
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe
- Size 24KB
- SHA256 e1b1dc86ebe7440828efab389cb9edcfd639463a8ff64742818a84859a7ff417
- MD5 17f51ab722963d73b5dcd050d06e6d40
- SHA1 70a1eb538fe961512c74dda727ef185c8eb42884
- SHA512 041794fb9817e578e3aa00f019ce295b82dc6ee5dd23b49e79785570d3f60c058f6292b1382ff3b0e9999774cb60bc5a76919b4fd79d2bba85ea594d9719ac0d
- SSDEEP 384:CKmkr5Ux4AetyVgSBD7l6hVl2lUquzb2Gf1NyVOtbIMSRGas1:HmkrqetGvFlyVl2l1Ebtaa
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe
- Size 24KB
- SHA256 e1b1dc86ebe7440828efab389cb9edcfd639463a8ff64742818a84859a7ff417
- MD5 17f51ab722963d73b5dcd050d06e6d40
- SHA1 70a1eb538fe961512c74dda727ef185c8eb42884
- SHA512 041794fb9817e578e3aa00f019ce295b82dc6ee5dd23b49e79785570d3f60c058f6292b1382ff3b0e9999774cb60bc5a76919b4fd79d2bba85ea594d9719ac0d
- SSDEEP 384:CKmkr5Ux4AetyVgSBD7l6hVl2lUquzb2Gf1NyVOtbIMSRGas1:HmkrqetGvFlyVl2l1Ebtaa
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe
- Size 24KB
- SHA256 e1b1dc86ebe7440828efab389cb9edcfd639463a8ff64742818a84859a7ff417
- MD5 17f51ab722963d73b5dcd050d06e6d40
- SHA1 70a1eb538fe961512c74dda727ef185c8eb42884
- SHA512 041794fb9817e578e3aa00f019ce295b82dc6ee5dd23b49e79785570d3f60c058f6292b1382ff3b0e9999774cb60bc5a76919b4fd79d2bba85ea594d9719ac0d
- SSDEEP 384:CKmkr5Ux4AetyVgSBD7l6hVl2lUquzb2Gf1NyVOtbIMSRGas1:HmkrqetGvFlyVl2l1Ebtaa
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\natsv.exe
- Size 24KB
- SHA256 e1b1dc86ebe7440828efab389cb9edcfd639463a8ff64742818a84859a7ff417
- MD5 17f51ab722963d73b5dcd050d06e6d40
- SHA1 70a1eb538fe961512c74dda727ef185c8eb42884
- SHA512 041794fb9817e578e3aa00f019ce295b82dc6ee5dd23b49e79785570d3f60c058f6292b1382ff3b0e9999774cb60bc5a76919b4fd79d2bba85ea594d9719ac0d
- SSDEEP 384:CKmkr5Ux4AetyVgSBD7l6hVl2lUquzb2Gf1NyVOtbIMSRGas1:HmkrqetGvFlyVl2l1Ebtaa
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch
- Size 514B
- SHA256 d133a6e443c86364b0697f3d0362d336c551e064195043b880df5547ecbf851b
- MD5 9ea4654b54e6522e9d8fb0d1743c62af
- SHA1 a874a55b86985f48787637096dfd9286b9ee0601
- SHA512 53dfa6038a33ac89520a23aab5f98e2e966117d277db38a2e7550d8aca4f1030823062d3fb2533ebbb55fd0dcbceb1a4dafbc92a024dac11357c782d47942841
- MD5 SHA1 SHA512
- Path C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch
- Size 514B
- SHA256 d133a6e443c86364b0697f3d0362d336c551e064195043b880df5547ecbf851b
- MD5 9ea4654b54e6522e9d8fb0d1743c62af
- SHA1 a874a55b86985f48787637096dfd9286b9ee0601
- SHA512 53dfa6038a33ac89520a23aab5f98e2e966117d277db38a2e7550d8aca4f1030823062d3fb2533ebbb55fd0dcbceb1a4dafbc92a024dac11357c782d47942841
- MD5 SHA1 SHA512