nymaim | 81d4d77a1a692bdef7079e32381788b8a3d02c7c66609ba078d68c873af41e32

Analysis

max time kernel
62s
max time network
64s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
13/11/2022, 17:48

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General

Target
file.exe
Size 1.9MB
Sample221113-wdevtscb34
SHA256 81d4d77a1a692bdef7079e32381788b8a3d02c7c66609ba078d68c873af41e32
MD5 97e99e2ca1c68c438c8be01400c16fb4
SHA1 3c8c599dd3ea72212f6f6488d163390c4fb7b953
SHA512 97924e984dbaf36700d2c81ba6c1e491eb1a08bb7cd66879843ec64b6e5e026f01b7e564459a82b193b51dba89f3386176bc06cd7ee072cf044ed2c482f70efb
SSDEEP 49152:Z213eS9Rvhi146/i+yTLzLjwg8hZ1A5hq:MjvI1PoLz4geZWDq
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
960	is-L2RJ5.tmp
1416	ghsearcher78.exe
1716	Vp1Nu.exe

Loads dropped DLL 6 IoCs

pid	Process
1372	file.exe
960	is-L2RJ5.tmp
960	is-L2RJ5.tmp
960	is-L2RJ5.tmp
960	is-L2RJ5.tmp
1416	ghsearcher78.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)\ghSearcher\is-AB22J.tmp	is-L2RJ5.tmp
File created	C:\Program Files (x86)\ghSearcher\is-UVJSQ.tmp	is-L2RJ5.tmp
File created	C:\Program Files (x86)\ghSearcher\is-8EH41.tmp	is-L2RJ5.tmp
File created	C:\Program Files (x86)\ghSearcher\is-GEU09.tmp	is-L2RJ5.tmp
File created	C:\Program Files (x86)\ghSearcher\is-6G061.tmp	is-L2RJ5.tmp
File created	C:\Program Files (x86)\ghSearcher\unins000.dat	is-L2RJ5.tmp
File created	C:\Program Files (x86)\ghSearcher\is-5PNB1.tmp	is-L2RJ5.tmp
File created	C:\Program Files (x86)\ghSearcher\is-9NJTK.tmp	is-L2RJ5.tmp
File created	C:\Program Files (x86)\ghSearcher\is-AUC6S.tmp	is-L2RJ5.tmp
File opened for modification	C:\Program Files (x86)\ghSearcher\unins000.dat	is-L2RJ5.tmp
File opened for modification	C:\Program Files (x86)\ghSearcher\ghsearcher78.exe	is-L2RJ5.tmp
File created	C:\Program Files (x86)\ghSearcher\is-LRA9V.tmp	is-L2RJ5.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
460	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1416	ghsearcher78.exe
1416	ghsearcher78.exe
1416	ghsearcher78.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	460	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1372 wrote to memory of 960	1372	file.exe	28
PID 1372 wrote to memory of 960	1372	file.exe	28
PID 1372 wrote to memory of 960	1372	file.exe	28
PID 1372 wrote to memory of 960	1372	file.exe	28
PID 1372 wrote to memory of 960	1372	file.exe	28
PID 1372 wrote to memory of 960	1372	file.exe	28
PID 1372 wrote to memory of 960	1372	file.exe	28
PID 960 wrote to memory of 1416	960	is-L2RJ5.tmp	29
PID 960 wrote to memory of 1416	960	is-L2RJ5.tmp	29
PID 960 wrote to memory of 1416	960	is-L2RJ5.tmp	29
PID 960 wrote to memory of 1416	960	is-L2RJ5.tmp	29
PID 1416 wrote to memory of 1716	1416	ghsearcher78.exe	30
PID 1416 wrote to memory of 1716	1416	ghsearcher78.exe	30
PID 1416 wrote to memory of 1716	1416	ghsearcher78.exe	30
PID 1416 wrote to memory of 1716	1416	ghsearcher78.exe	30
PID 1416 wrote to memory of 1920	1416	ghsearcher78.exe	33
PID 1416 wrote to memory of 1920	1416	ghsearcher78.exe	33
PID 1416 wrote to memory of 1920	1416	ghsearcher78.exe	33
PID 1416 wrote to memory of 1920	1416	ghsearcher78.exe	33
PID 1920 wrote to memory of 460	1920	cmd.exe	35
PID 1920 wrote to memory of 460	1920	cmd.exe	35
PID 1920 wrote to memory of 460	1920	cmd.exe	35
PID 1920 wrote to memory of 460	1920	cmd.exe	35

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:1372
- C:\Users\Admin\AppData\Local\Temp\is-8KKIE.tmp\is-L2RJ5.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-8KKIE.tmp\is-L2RJ5.tmp" /SL4 $60120 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1746561 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:960
- - C:\Program Files (x86)\ghSearcher\ghsearcher78.exe
    "C:\Program Files (x86)\ghSearcher\ghsearcher78.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1416
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Vp1Nu.exe
      4⤵
      Executes dropped EXE
      PID:1716
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ghsearcher78.exe" /f & erase "C:\Program Files (x86)\ghSearcher\ghsearcher78.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1920
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ghsearcher78.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:460

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

ghsearcher78.exe

Path C:\Program Files (x86)\ghSearcher\ghsearcher78.exe
Size 2.5MB
SHA256 cd538f8e3801c8f5d1e8e81d44305b2447a92985c3b933e05b39066782e4b194
MD5 c5196068f39d5296e1cd542fb908efc3
SHA1 b52540607e325d675554d5e7a6e96d082d728e86
SHA512 22e1c7e0af2969023ab1517550ada6e75d909d38d98174608decfb8fc3551362b965652832314641d50a223c29ddcdce463225c06edd4c80c836fd2419943b4e
SSDEEP 49152:9sI0fQmT9PEY6dVSb1+/zSpvBUMMS5dhQLt0Wr90xfdLP6:tkbuOxBUMMS5dhQ6Wr96fdLy
MD5 SHA1 SHA512 SSDEEP

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ghsearcher78.exe

Path C:\Program Files (x86)\ghSearcher\ghsearcher78.exe
Size 2.5MB
SHA256 cd538f8e3801c8f5d1e8e81d44305b2447a92985c3b933e05b39066782e4b194
MD5 c5196068f39d5296e1cd542fb908efc3
SHA1 b52540607e325d675554d5e7a6e96d082d728e86
SHA512 22e1c7e0af2969023ab1517550ada6e75d909d38d98174608decfb8fc3551362b965652832314641d50a223c29ddcdce463225c06edd4c80c836fd2419943b4e
SSDEEP 49152:9sI0fQmT9PEY6dVSb1+/zSpvBUMMS5dhQLt0Wr90xfdLP6:tkbuOxBUMMS5dhQ6Wr96fdLy
MD5 SHA1 SHA512 SSDEEP

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is-L2RJ5.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-8KKIE.tmp\is-L2RJ5.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-L2RJ5.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-8KKIE.tmp\is-L2RJ5.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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Vp1Nu.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Vp1Nu.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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ghsearcher78.exe

Path \Program Files (x86)\ghSearcher\ghsearcher78.exe
Size 2.5MB
SHA256 cd538f8e3801c8f5d1e8e81d44305b2447a92985c3b933e05b39066782e4b194
MD5 c5196068f39d5296e1cd542fb908efc3
SHA1 b52540607e325d675554d5e7a6e96d082d728e86
SHA512 22e1c7e0af2969023ab1517550ada6e75d909d38d98174608decfb8fc3551362b965652832314641d50a223c29ddcdce463225c06edd4c80c836fd2419943b4e
SSDEEP 49152:9sI0fQmT9PEY6dVSb1+/zSpvBUMMS5dhQLt0Wr90xfdLP6:tkbuOxBUMMS5dhQ6Wr96fdLy
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-L2RJ5.tmp

Path \Users\Admin\AppData\Local\Temp\is-8KKIE.tmp\is-L2RJ5.tmp
Size 657KB
SHA256 e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f
MD5 7cd12c54a9751ca6eee6ab0c85fb68f5
SHA1 76562e9b7888b6d20d67addb5a90b68b54a51987
SHA512 27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc
SSDEEP 12288:CkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphIxz:ZFRCUn4rP/37YzHXA6QJsoPtIpqxz
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-8V2QJ.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-8V2QJ.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-8V2QJ.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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Vp1Nu.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\Vp1Nu.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/960-77-0x0000000003240000-0x00000000042C3000-memory.dmp

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memory/960-69-0x0000000003240000-0x00000000042C3000-memory.dmp

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memory/1372-68-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1372-54-0x0000000075921000-0x0000000075923000-memory.dmp

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memory/1372-87-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1372-55-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1416-70-0x0000000000400000-0x0000000001483000-memory.dmp

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memory/1416-78-0x0000000000400000-0x0000000001483000-memory.dmp

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memory/1416-79-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1416-83-0x0000000000400000-0x0000000001483000-memory.dmp

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memory/1416-73-0x0000000000400000-0x0000000001483000-memory.dmp

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memory/1416-86-0x0000000000400000-0x0000000001483000-memory.dmp

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memory/1416-71-0x0000000000400000-0x0000000001483000-memory.dmp

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