nymaim | d757de0a694b41086a7a8c3529ca0078ade2abe446085b1c11d39a2c59c5faac

Analysis

max time kernel
61s
max time network
66s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
09/12/2022, 12:47

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General

Target
file.exe
Size 2.3MB
Sample221209-pz7dmsdb85
SHA256 d757de0a694b41086a7a8c3529ca0078ade2abe446085b1c11d39a2c59c5faac
MD5 55accc5165942398c0814a32a68d6569
SHA1 e7bb9910dcd1a56437d521f21d496470e295ba73
SHA512 b15ffa5773cec89d8ce140f8520634168580da5acb27752d464ac2af3e3ab5bdf95ec68f69ad5cf410d31b78fdb1e45ca354c14b23aeadfd4a168fbf441ac86f
SSDEEP 49152:eBbTQocfXiOzVYVJoZrOwyKumSQmy4PDPORqhERYvbZe:edZcaOzyvAOhKuJpzOgnvb8
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
1188	is-1MU3J.tmp
920	ntFolders.exe
760	D3U5RzZ0x9v.exe

Loads dropped DLL 10 IoCs

pid	Process
1300	file.exe
1188	is-1MU3J.tmp
1188	is-1MU3J.tmp
1188	is-1MU3J.tmp
1188	is-1MU3J.tmp
920	ntFolders.exe
920	ntFolders.exe
920	ntFolders.exe
760	D3U5RzZ0x9v.exe
760	D3U5RzZ0x9v.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 opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-1MU3J.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ntFolders.exe	is-1MU3J.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-1MU3J.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HB0BB.tmp	is-1MU3J.tmp
File created	C:\Program Files (x86)\PrintFolders\is-OL0GT.tmp	is-1MU3J.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1STTI.tmp	is-1MU3J.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JM7H4.tmp	is-1MU3J.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0V8LV.tmp	is-1MU3J.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PREAP.tmp	is-1MU3J.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
1816	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
920	ntFolders.exe
920	ntFolders.exe
920	ntFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1816	taskkill.exe
Token: SeRestorePrivilege	1188	is-1MU3J.tmp
Token: SeBackupPrivilege	1188	is-1MU3J.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1300 wrote to memory of 1188	1300	file.exe	27
PID 1300 wrote to memory of 1188	1300	file.exe	27
PID 1300 wrote to memory of 1188	1300	file.exe	27
PID 1300 wrote to memory of 1188	1300	file.exe	27
PID 1300 wrote to memory of 1188	1300	file.exe	27
PID 1300 wrote to memory of 1188	1300	file.exe	27
PID 1300 wrote to memory of 1188	1300	file.exe	27
PID 1188 wrote to memory of 920	1188	is-1MU3J.tmp	28
PID 1188 wrote to memory of 920	1188	is-1MU3J.tmp	28
PID 1188 wrote to memory of 920	1188	is-1MU3J.tmp	28
PID 1188 wrote to memory of 920	1188	is-1MU3J.tmp	28
PID 1188 wrote to memory of 920	1188	is-1MU3J.tmp	28
PID 1188 wrote to memory of 920	1188	is-1MU3J.tmp	28
PID 1188 wrote to memory of 920	1188	is-1MU3J.tmp	28
PID 920 wrote to memory of 760	920	ntFolders.exe	29
PID 920 wrote to memory of 760	920	ntFolders.exe	29
PID 920 wrote to memory of 760	920	ntFolders.exe	29
PID 920 wrote to memory of 760	920	ntFolders.exe	29
PID 920 wrote to memory of 760	920	ntFolders.exe	29
PID 920 wrote to memory of 760	920	ntFolders.exe	29
PID 920 wrote to memory of 760	920	ntFolders.exe	29
PID 920 wrote to memory of 1948	920	ntFolders.exe	32
PID 920 wrote to memory of 1948	920	ntFolders.exe	32
PID 920 wrote to memory of 1948	920	ntFolders.exe	32
PID 920 wrote to memory of 1948	920	ntFolders.exe	32
PID 920 wrote to memory of 1948	920	ntFolders.exe	32
PID 920 wrote to memory of 1948	920	ntFolders.exe	32
PID 920 wrote to memory of 1948	920	ntFolders.exe	32
PID 1948 wrote to memory of 1816	1948	cmd.exe	34
PID 1948 wrote to memory of 1816	1948	cmd.exe	34
PID 1948 wrote to memory of 1816	1948	cmd.exe	34
PID 1948 wrote to memory of 1816	1948	cmd.exe	34
PID 1948 wrote to memory of 1816	1948	cmd.exe	34
PID 1948 wrote to memory of 1816	1948	cmd.exe	34
PID 1948 wrote to memory of 1816	1948	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:1300
- C:\Users\Admin\AppData\Local\Temp\is-7N6U3.tmp\is-1MU3J.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-7N6U3.tmp\is-1MU3J.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2173838 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1188
- - C:\Program Files (x86)\PrintFolders\ntFolders.exe
    "C:\Program Files (x86)\PrintFolders\ntFolders.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:920
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\D3U5RzZ0x9v.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:760
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ntFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\ntFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1948
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1816

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

ntFolders.exe

Path C:\Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.4MB
SHA256 e8acd36a4a452f312596ff4b279d59ea699004ac6daedd7ae845a4554adf3bca
MD5 1c9d4f1404cf4a3185a430c383a62c5d
SHA1 939376461222a3cf8a730e3d6e462dfe9567cb69
SHA512 ba62e9cd62b8ce585f2a67fb498b630eb189424e21d6290c49237a19bfe1e5f89cf8b399b196a13ea9d6e1ff8edef024eb243e640c377ccce0af8d17bbb8da8b
SSDEEP 49152:pEvVgv+m9i1KPWaSAYCAc28BHJyU6OZvxOhT0IltsfaKb8gQAp:p4+d9i1KPW4YJaHJyU6OZvx+Tmfl8gp
MD5 SHA1 SHA512 SSDEEP

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ntFolders.exe

Path C:\Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.4MB
SHA256 e8acd36a4a452f312596ff4b279d59ea699004ac6daedd7ae845a4554adf3bca
MD5 1c9d4f1404cf4a3185a430c383a62c5d
SHA1 939376461222a3cf8a730e3d6e462dfe9567cb69
SHA512 ba62e9cd62b8ce585f2a67fb498b630eb189424e21d6290c49237a19bfe1e5f89cf8b399b196a13ea9d6e1ff8edef024eb243e640c377ccce0af8d17bbb8da8b
SSDEEP 49152:pEvVgv+m9i1KPWaSAYCAc28BHJyU6OZvxOhT0IltsfaKb8gQAp:p4+d9i1KPW4YJaHJyU6OZvx+Tmfl8gp
MD5 SHA1 SHA512 SSDEEP

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is-1MU3J.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-7N6U3.tmp\is-1MU3J.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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is-1MU3J.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-7N6U3.tmp\is-1MU3J.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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D3U5RzZ0x9v.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\D3U5RzZ0x9v.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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D3U5RzZ0x9v.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\D3U5RzZ0x9v.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

ntFolders.exe

Path \Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.4MB
SHA256 e8acd36a4a452f312596ff4b279d59ea699004ac6daedd7ae845a4554adf3bca
MD5 1c9d4f1404cf4a3185a430c383a62c5d
SHA1 939376461222a3cf8a730e3d6e462dfe9567cb69
SHA512 ba62e9cd62b8ce585f2a67fb498b630eb189424e21d6290c49237a19bfe1e5f89cf8b399b196a13ea9d6e1ff8edef024eb243e640c377ccce0af8d17bbb8da8b
SSDEEP 49152:pEvVgv+m9i1KPWaSAYCAc28BHJyU6OZvxOhT0IltsfaKb8gQAp:p4+d9i1KPW4YJaHJyU6OZvx+Tmfl8gp
MD5 SHA1 SHA512 SSDEEP

Submit Download

ntFolders.exe

Path \Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.4MB
SHA256 e8acd36a4a452f312596ff4b279d59ea699004ac6daedd7ae845a4554adf3bca
MD5 1c9d4f1404cf4a3185a430c383a62c5d
SHA1 939376461222a3cf8a730e3d6e462dfe9567cb69
SHA512 ba62e9cd62b8ce585f2a67fb498b630eb189424e21d6290c49237a19bfe1e5f89cf8b399b196a13ea9d6e1ff8edef024eb243e640c377ccce0af8d17bbb8da8b
SSDEEP 49152:pEvVgv+m9i1KPWaSAYCAc28BHJyU6OZvxOhT0IltsfaKb8gQAp:p4+d9i1KPW4YJaHJyU6OZvx+Tmfl8gp
MD5 SHA1 SHA512 SSDEEP

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ntFolders.exe

Path \Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.4MB
SHA256 e8acd36a4a452f312596ff4b279d59ea699004ac6daedd7ae845a4554adf3bca
MD5 1c9d4f1404cf4a3185a430c383a62c5d
SHA1 939376461222a3cf8a730e3d6e462dfe9567cb69
SHA512 ba62e9cd62b8ce585f2a67fb498b630eb189424e21d6290c49237a19bfe1e5f89cf8b399b196a13ea9d6e1ff8edef024eb243e640c377ccce0af8d17bbb8da8b
SSDEEP 49152:pEvVgv+m9i1KPWaSAYCAc28BHJyU6OZvxOhT0IltsfaKb8gQAp:p4+d9i1KPW4YJaHJyU6OZvx+Tmfl8gp
MD5 SHA1 SHA512 SSDEEP

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is-1MU3J.tmp

Path \Users\Admin\AppData\Local\Temp\is-7N6U3.tmp\is-1MU3J.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-O81I9.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-O81I9.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-O81I9.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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D3U5RzZ0x9v.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\D3U5RzZ0x9v.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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D3U5RzZ0x9v.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\D3U5RzZ0x9v.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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D3U5RzZ0x9v.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\D3U5RzZ0x9v.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/920-75-0x0000000001C00000-0x0000000002D71000-memory.dmp

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memory/920-90-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/920-76-0x0000000001C00000-0x0000000002D71000-memory.dmp

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memory/920-77-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/920-78-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/920-74-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/920-97-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/920-92-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/920-87-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1188-86-0x0000000003120000-0x0000000004291000-memory.dmp

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memory/1188-73-0x0000000003120000-0x0000000004291000-memory.dmp

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memory/1300-55-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1300-54-0x00000000757A1000-0x00000000757A3000-memory.dmp

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memory/1300-65-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1300-98-0x0000000000400000-0x000000000041E000-memory.dmp

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