nymaim | 8c030ac76c5418e320817ebcba5d3d2c41d09acc0053a52bba02ee62ce2615d2

Analysis

max time kernel
143s
max time network
180s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
19/10/2022, 22:29

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General

Target
file.exe
Size 2.4MB
Sample221019-2d749sbcdk
SHA256 8c030ac76c5418e320817ebcba5d3d2c41d09acc0053a52bba02ee62ce2615d2
MD5 c52660262341acd9a18a34fd6bc0b57f
SHA1 12247339ecfa1a7d5f540eb224f99f5d6d0faaee
SHA512 8c049354a7650941ac1f00fcfa71637c2cb41b2c28e605ace65cba1a617e6f4e5d008d7582220d91c5566ad6abea20cb8adbde556186f03a2efda0c8ae0ec97e
SSDEEP 49152:Z2pbhiSMO0KaMLDLHh8CpRGdbZDVmpD+M8kf1A5hq:MZhiZMLDj5+dkp8kODq
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.15.156.54
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
1504	is-D2J99.tmp
2040	ejsearcher53.exe
316	jwuR8uUUyLNiV.exe

Loads dropped DLL 6 IoCs

pid	Process
976	file.exe
1504	is-D2J99.tmp
1504	is-D2J99.tmp
1504	is-D2J99.tmp
1504	is-D2J99.tmp
2040	ejsearcher53.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 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\ejSearcher\is-I0R10.tmp	is-D2J99.tmp
File created	C:\Program Files (x86)\ejSearcher\is-6KAD4.tmp	is-D2J99.tmp
File created	C:\Program Files (x86)\ejSearcher\is-G6GJ0.tmp	is-D2J99.tmp
File created	C:\Program Files (x86)\ejSearcher\is-36LUL.tmp	is-D2J99.tmp
File created	C:\Program Files (x86)\ejSearcher\is-ANP06.tmp	is-D2J99.tmp
File created	C:\Program Files (x86)\ejSearcher\is-0AOSO.tmp	is-D2J99.tmp
File created	C:\Program Files (x86)\ejSearcher\unins000.dat	is-D2J99.tmp
File created	C:\Program Files (x86)\ejSearcher\is-H2VD6.tmp	is-D2J99.tmp
File opened for modification	C:\Program Files (x86)\ejSearcher\unins000.dat	is-D2J99.tmp
File opened for modification	C:\Program Files (x86)\ejSearcher\ejsearcher53.exe	is-D2J99.tmp
File created	C:\Program Files (x86)\ejSearcher\is-7NR6K.tmp	is-D2J99.tmp
File created	C:\Program Files (x86)\ejSearcher\is-UDPC2.tmp	is-D2J99.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
1928	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2040	ejsearcher53.exe
2040	ejsearcher53.exe
2040	ejsearcher53.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1928	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 976 wrote to memory of 1504	976	file.exe	27
PID 976 wrote to memory of 1504	976	file.exe	27
PID 976 wrote to memory of 1504	976	file.exe	27
PID 976 wrote to memory of 1504	976	file.exe	27
PID 976 wrote to memory of 1504	976	file.exe	27
PID 976 wrote to memory of 1504	976	file.exe	27
PID 976 wrote to memory of 1504	976	file.exe	27
PID 1504 wrote to memory of 2040	1504	is-D2J99.tmp	28
PID 1504 wrote to memory of 2040	1504	is-D2J99.tmp	28
PID 1504 wrote to memory of 2040	1504	is-D2J99.tmp	28
PID 1504 wrote to memory of 2040	1504	is-D2J99.tmp	28
PID 2040 wrote to memory of 316	2040	ejsearcher53.exe	31
PID 2040 wrote to memory of 316	2040	ejsearcher53.exe	31
PID 2040 wrote to memory of 316	2040	ejsearcher53.exe	31
PID 2040 wrote to memory of 316	2040	ejsearcher53.exe	31
PID 2040 wrote to memory of 1696	2040	ejsearcher53.exe	32
PID 2040 wrote to memory of 1696	2040	ejsearcher53.exe	32
PID 2040 wrote to memory of 1696	2040	ejsearcher53.exe	32
PID 2040 wrote to memory of 1696	2040	ejsearcher53.exe	32
PID 1696 wrote to memory of 1928	1696	cmd.exe	34
PID 1696 wrote to memory of 1928	1696	cmd.exe	34
PID 1696 wrote to memory of 1928	1696	cmd.exe	34
PID 1696 wrote to memory of 1928	1696	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:976
- C:\Users\Admin\AppData\Local\Temp\is-4TT4K.tmp\is-D2J99.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-4TT4K.tmp\is-D2J99.tmp" /SL4 $60122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2274898 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1504
- - C:\Program Files (x86)\ejSearcher\ejsearcher53.exe
    "C:\Program Files (x86)\ejSearcher\ejsearcher53.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2040
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jwuR8uUUyLNiV.exe
      4⤵
      Executes dropped EXE
      PID:316
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ejsearcher53.exe" /f & erase "C:\Program Files (x86)\ejSearcher\ejsearcher53.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1696
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ejsearcher53.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1928

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

ejsearcher53.exe

Path C:\Program Files (x86)\ejSearcher\ejsearcher53.exe
Size 4.0MB
SHA256 6b7151cc7bdcc3c11d23ed1d058f60af646bf78a127cf30a9ded0bbc9bc846cb
MD5 5e457b44ee21fc88339281bd942b4adc
SHA1 073182dccaa77254cfdd258d29969b06a1a3e81c
SHA512 da39c8291a655c8b2da8ae05332888c8bc2d082714eadf6723c6dc556047291fb74951c1c566863e7273628b3b8a534b9b810bddc5be9c8688b58f820ee4f9f0
SSDEEP 49152:MtpY1cyViYtvYtzYtFYtbYthYtBV3qhYvo0dj+jQtUxbDZdozrd3Ya:2FV3bvo0j+jQtUxbDZdoZh
MD5 SHA1 SHA512 SSDEEP

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ejsearcher53.exe

Path C:\Program Files (x86)\ejSearcher\ejsearcher53.exe
Size 4.0MB
SHA256 6b7151cc7bdcc3c11d23ed1d058f60af646bf78a127cf30a9ded0bbc9bc846cb
MD5 5e457b44ee21fc88339281bd942b4adc
SHA1 073182dccaa77254cfdd258d29969b06a1a3e81c
SHA512 da39c8291a655c8b2da8ae05332888c8bc2d082714eadf6723c6dc556047291fb74951c1c566863e7273628b3b8a534b9b810bddc5be9c8688b58f820ee4f9f0
SSDEEP 49152:MtpY1cyViYtvYtzYtFYtbYthYtBV3qhYvo0dj+jQtUxbDZdozrd3Ya:2FV3bvo0j+jQtUxbDZdoZh
MD5 SHA1 SHA512 SSDEEP

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is-D2J99.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-4TT4K.tmp\is-D2J99.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

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is-D2J99.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-4TT4K.tmp\is-D2J99.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

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jwuR8uUUyLNiV.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jwuR8uUUyLNiV.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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ejsearcher53.exe

Path \Program Files (x86)\ejSearcher\ejsearcher53.exe
Size 4.0MB
SHA256 6b7151cc7bdcc3c11d23ed1d058f60af646bf78a127cf30a9ded0bbc9bc846cb
MD5 5e457b44ee21fc88339281bd942b4adc
SHA1 073182dccaa77254cfdd258d29969b06a1a3e81c
SHA512 da39c8291a655c8b2da8ae05332888c8bc2d082714eadf6723c6dc556047291fb74951c1c566863e7273628b3b8a534b9b810bddc5be9c8688b58f820ee4f9f0
SSDEEP 49152:MtpY1cyViYtvYtzYtFYtbYthYtBV3qhYvo0dj+jQtUxbDZdozrd3Ya:2FV3bvo0j+jQtUxbDZdoZh
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-D2J99.tmp

Path \Users\Admin\AppData\Local\Temp\is-4TT4K.tmp\is-D2J99.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-K80OI.tmp\_isetup\_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-K80OI.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-K80OI.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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jwuR8uUUyLNiV.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jwuR8uUUyLNiV.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/976-55-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/976-66-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/976-88-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/976-57-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/976-54-0x0000000074C91000-0x0000000074C93000-memory.dmp

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memory/1504-70-0x0000000003240000-0x0000000004436000-memory.dmp

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memory/1504-73-0x0000000003240000-0x0000000004436000-memory.dmp

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memory/2040-71-0x0000000000400000-0x00000000015F6000-memory.dmp

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memory/2040-77-0x0000000000400000-0x00000000015F6000-memory.dmp

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memory/2040-81-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2040-76-0x0000000000400000-0x00000000015F6000-memory.dmp

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memory/2040-75-0x0000000000400000-0x00000000015F6000-memory.dmp

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memory/2040-87-0x0000000000400000-0x00000000015F6000-memory.dmp

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memory/2040-74-0x0000000000400000-0x00000000015F6000-memory.dmp

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