nymaim | ec3190bee8b37b12a46aeb60c273f3d1397d2e739fab71aa2a24d03ffa3efbac

Analysis

max time kernel
59s
max time network
65s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
06/12/2022, 00:03

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General

Target
file.exe
Size 3.8MB
Sample221206-ab2e6ada6w
SHA256 ec3190bee8b37b12a46aeb60c273f3d1397d2e739fab71aa2a24d03ffa3efbac
MD5 0d075c0a31d92de7f67fd3cc10526e89
SHA1 261d82decd3192cdd675e2e027c5d4436572a5f1
SHA512 814ffd0dce2d10994c7173d7a62d6732afa324369cd944082f274b7cef25633ebd9401aeec83a6dc2771e6322b06b78c73bb6244a48bf7a1100d55e364af818a
SSDEEP 98304:wOa+3ngx1WUVTgKbOTMIkSvnnWl/nNmGRdcwb/sgoN2c4FrNppy2LcY/f:NaEngv1f4MQnn+/4GMwD3oNx4pNLcY/f
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
592	is-OB4PI.tmp
688	PrintFolders.exe
1444	gnEkhGNgOm7ahA.exe

Loads dropped DLL 10 IoCs

pid	Process
840	file.exe
592	is-OB4PI.tmp
592	is-OB4PI.tmp
592	is-OB4PI.tmp
592	is-OB4PI.tmp
688	PrintFolders.exe
688	PrintFolders.exe
688	PrintFolders.exe
1444	gnEkhGNgOm7ahA.exe
1444	gnEkhGNgOm7ahA.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-EBBP2.tmp	is-OB4PI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3GE6P.tmp	is-OB4PI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I1RPL.tmp	is-OB4PI.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OB4PI.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OB4PI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DJB90.tmp	is-OB4PI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-85G4V.tmp	is-OB4PI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-67EV9.tmp	is-OB4PI.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-OB4PI.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
584	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
688	PrintFolders.exe
688	PrintFolders.exe
688	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	584	taskkill.exe
Token: SeRestorePrivilege	592	is-OB4PI.tmp
Token: SeBackupPrivilege	592	is-OB4PI.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 840 wrote to memory of 592	840	file.exe	27
PID 840 wrote to memory of 592	840	file.exe	27
PID 840 wrote to memory of 592	840	file.exe	27
PID 840 wrote to memory of 592	840	file.exe	27
PID 840 wrote to memory of 592	840	file.exe	27
PID 840 wrote to memory of 592	840	file.exe	27
PID 840 wrote to memory of 592	840	file.exe	27
PID 592 wrote to memory of 688	592	is-OB4PI.tmp	28
PID 592 wrote to memory of 688	592	is-OB4PI.tmp	28
PID 592 wrote to memory of 688	592	is-OB4PI.tmp	28
PID 592 wrote to memory of 688	592	is-OB4PI.tmp	28
PID 592 wrote to memory of 688	592	is-OB4PI.tmp	28
PID 592 wrote to memory of 688	592	is-OB4PI.tmp	28
PID 592 wrote to memory of 688	592	is-OB4PI.tmp	28
PID 688 wrote to memory of 1444	688	PrintFolders.exe	29
PID 688 wrote to memory of 1444	688	PrintFolders.exe	29
PID 688 wrote to memory of 1444	688	PrintFolders.exe	29
PID 688 wrote to memory of 1444	688	PrintFolders.exe	29
PID 688 wrote to memory of 1444	688	PrintFolders.exe	29
PID 688 wrote to memory of 1444	688	PrintFolders.exe	29
PID 688 wrote to memory of 1444	688	PrintFolders.exe	29
PID 688 wrote to memory of 1672	688	PrintFolders.exe	32
PID 688 wrote to memory of 1672	688	PrintFolders.exe	32
PID 688 wrote to memory of 1672	688	PrintFolders.exe	32
PID 688 wrote to memory of 1672	688	PrintFolders.exe	32
PID 688 wrote to memory of 1672	688	PrintFolders.exe	32
PID 688 wrote to memory of 1672	688	PrintFolders.exe	32
PID 688 wrote to memory of 1672	688	PrintFolders.exe	32
PID 1672 wrote to memory of 584	1672	cmd.exe	34
PID 1672 wrote to memory of 584	1672	cmd.exe	34
PID 1672 wrote to memory of 584	1672	cmd.exe	34
PID 1672 wrote to memory of 584	1672	cmd.exe	34
PID 1672 wrote to memory of 584	1672	cmd.exe	34
PID 1672 wrote to memory of 584	1672	cmd.exe	34
PID 1672 wrote to memory of 584	1672	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:840
- C:\Users\Admin\AppData\Local\Temp\is-C1O0N.tmp\is-OB4PI.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-C1O0N.tmp\is-OB4PI.tmp" /SL4 $7014C "C:\Users\Admin\AppData\Local\Temp\file.exe" 3759280 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:592
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:688
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\gnEkhGNgOm7ahA.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1444
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1672
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:584

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.2MB
SHA256 34dfc8915ce2482d64b4f30875aed4175c54e57fe9a052168c856fce5a4eb469
MD5 e45faed855a22d0bc699fd5f44ca7063
SHA1 70977b4fcf7717b3676a0ffefbfbd4ccf9860d76
SHA512 67e3b315b9cbf530278a36f913d8d28d92dba7a016d5896011d083c7c3e833f0544d19ad3abdf4afb006e5f5b52e328393ff2cc65d6a03cb1ab100c005894486
SSDEEP 98304:6c2Wjd75PniyBESWzullDhRwJBC2UObndyV5/VrxWdYCYT:Hh75FEValv+
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.2MB
SHA256 34dfc8915ce2482d64b4f30875aed4175c54e57fe9a052168c856fce5a4eb469
MD5 e45faed855a22d0bc699fd5f44ca7063
SHA1 70977b4fcf7717b3676a0ffefbfbd4ccf9860d76
SHA512 67e3b315b9cbf530278a36f913d8d28d92dba7a016d5896011d083c7c3e833f0544d19ad3abdf4afb006e5f5b52e328393ff2cc65d6a03cb1ab100c005894486
SSDEEP 98304:6c2Wjd75PniyBESWzullDhRwJBC2UObndyV5/VrxWdYCYT:Hh75FEValv+
MD5 SHA1 SHA512 SSDEEP

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is-OB4PI.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-C1O0N.tmp\is-OB4PI.tmp
Size 797KB
SHA256 4252858d9c6d8d55f829d7e418ea8357fd26fbdf8c0fce1fed23a8c720a8807e
MD5 10c841b0221d6870de7c951eaf5b1da9
SHA1 7cd2baa89144371033d8d7bebf947da886cd8795
SHA512 e2330231d6056cf8f395e1b884e136ee29161f9b9afb4492e9057aaa254c8a9b89b95be8bd11dc6d83fdc2147b864529ce49ef072015f9f40f677a0f8d12555e
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvacxKcxOu:njrP837JzHvA6pnvFxv1fp
MD5 SHA1 SHA512 SSDEEP

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is-OB4PI.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-C1O0N.tmp\is-OB4PI.tmp
Size 797KB
SHA256 4252858d9c6d8d55f829d7e418ea8357fd26fbdf8c0fce1fed23a8c720a8807e
MD5 10c841b0221d6870de7c951eaf5b1da9
SHA1 7cd2baa89144371033d8d7bebf947da886cd8795
SHA512 e2330231d6056cf8f395e1b884e136ee29161f9b9afb4492e9057aaa254c8a9b89b95be8bd11dc6d83fdc2147b864529ce49ef072015f9f40f677a0f8d12555e
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvacxKcxOu:njrP837JzHvA6pnvFxv1fp
MD5 SHA1 SHA512 SSDEEP

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gnEkhGNgOm7ahA.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\gnEkhGNgOm7ahA.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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gnEkhGNgOm7ahA.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\gnEkhGNgOm7ahA.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.2MB
SHA256 34dfc8915ce2482d64b4f30875aed4175c54e57fe9a052168c856fce5a4eb469
MD5 e45faed855a22d0bc699fd5f44ca7063
SHA1 70977b4fcf7717b3676a0ffefbfbd4ccf9860d76
SHA512 67e3b315b9cbf530278a36f913d8d28d92dba7a016d5896011d083c7c3e833f0544d19ad3abdf4afb006e5f5b52e328393ff2cc65d6a03cb1ab100c005894486
SSDEEP 98304:6c2Wjd75PniyBESWzullDhRwJBC2UObndyV5/VrxWdYCYT:Hh75FEValv+
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.2MB
SHA256 34dfc8915ce2482d64b4f30875aed4175c54e57fe9a052168c856fce5a4eb469
MD5 e45faed855a22d0bc699fd5f44ca7063
SHA1 70977b4fcf7717b3676a0ffefbfbd4ccf9860d76
SHA512 67e3b315b9cbf530278a36f913d8d28d92dba7a016d5896011d083c7c3e833f0544d19ad3abdf4afb006e5f5b52e328393ff2cc65d6a03cb1ab100c005894486
SSDEEP 98304:6c2Wjd75PniyBESWzullDhRwJBC2UObndyV5/VrxWdYCYT:Hh75FEValv+
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.2MB
SHA256 34dfc8915ce2482d64b4f30875aed4175c54e57fe9a052168c856fce5a4eb469
MD5 e45faed855a22d0bc699fd5f44ca7063
SHA1 70977b4fcf7717b3676a0ffefbfbd4ccf9860d76
SHA512 67e3b315b9cbf530278a36f913d8d28d92dba7a016d5896011d083c7c3e833f0544d19ad3abdf4afb006e5f5b52e328393ff2cc65d6a03cb1ab100c005894486
SSDEEP 98304:6c2Wjd75PniyBESWzullDhRwJBC2UObndyV5/VrxWdYCYT:Hh75FEValv+
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-OB4PI.tmp

Path \Users\Admin\AppData\Local\Temp\is-C1O0N.tmp\is-OB4PI.tmp
Size 797KB
SHA256 4252858d9c6d8d55f829d7e418ea8357fd26fbdf8c0fce1fed23a8c720a8807e
MD5 10c841b0221d6870de7c951eaf5b1da9
SHA1 7cd2baa89144371033d8d7bebf947da886cd8795
SHA512 e2330231d6056cf8f395e1b884e136ee29161f9b9afb4492e9057aaa254c8a9b89b95be8bd11dc6d83fdc2147b864529ce49ef072015f9f40f677a0f8d12555e
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvacxKcxOu:njrP837JzHvA6pnvFxv1fp
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-CC68S.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-CC68S.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-CC68S.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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gnEkhGNgOm7ahA.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\gnEkhGNgOm7ahA.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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gnEkhGNgOm7ahA.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\gnEkhGNgOm7ahA.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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gnEkhGNgOm7ahA.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\gnEkhGNgOm7ahA.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/592-86-0x0000000002F40000-0x0000000004376000-memory.dmp

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memory/592-73-0x0000000002F40000-0x0000000004376000-memory.dmp

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memory/688-74-0x0000000000400000-0x0000000001836000-memory.dmp

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memory/688-78-0x0000000000400000-0x0000000001836000-memory.dmp

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memory/688-77-0x0000000000400000-0x0000000001836000-memory.dmp

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memory/688-76-0x0000000001FB0000-0x00000000033E6000-memory.dmp

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memory/688-75-0x0000000001FB0000-0x00000000033E6000-memory.dmp

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memory/688-98-0x0000000000400000-0x0000000001836000-memory.dmp

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memory/688-93-0x0000000000400000-0x0000000001836000-memory.dmp

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memory/688-92-0x0000000001FB0000-0x00000000033E6000-memory.dmp

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memory/688-87-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/688-89-0x0000000000400000-0x0000000001836000-memory.dmp

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memory/840-65-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/840-54-0x0000000076561000-0x0000000076563000-memory.dmp

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memory/840-55-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/840-99-0x0000000000400000-0x0000000000439000-memory.dmp

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