nymaim | a121f703dffa60686f44d0222d271e0046b005f0d9973bfa00be72510754e560

Analysis

max time kernel
59s
max time network
64s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
07/12/2022, 08:16

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General

Target
file.exe
Size 2.2MB
Sample221207-j548kshg62
SHA256 a121f703dffa60686f44d0222d271e0046b005f0d9973bfa00be72510754e560
MD5 c9307a2cda6e85b243d5ba5a5c388d00
SHA1 dc85bd3b789e717978a6161fd0bcc1a53c838d84
SHA512 8d4f0aae90bc176e0285079cdeabb5fa89b47bd7134562dbe32509f9fc5e96e93ea0976d03c73422d8a770512d89c5b4b74341dab5bbf1c623bdd3ec481f3b98
SSDEEP 49152:unKNRWxkm4ryG21v0Fd3Gas1z2r5RsI/ATYo9OEHCZwN41kg:unK3st4WG6z0ii/
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
940	is-E0KE7.tmp
976	RintFolders.exe
580	VfRb7hrFR9ISjZ.exe

Loads dropped DLL 10 IoCs

pid	Process
1696	file.exe
940	is-E0KE7.tmp
940	is-E0KE7.tmp
940	is-E0KE7.tmp
940	is-E0KE7.tmp
976	RintFolders.exe
976	RintFolders.exe
976	RintFolders.exe
580	VfRb7hrFR9ISjZ.exe
580	VfRb7hrFR9ISjZ.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\unins000.dat	is-E0KE7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-D9EDG.tmp	is-E0KE7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-41V6A.tmp	is-E0KE7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-OL461.tmp	is-E0KE7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8OI6R.tmp	is-E0KE7.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\RintFolders.exe	is-E0KE7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-CUP14.tmp	is-E0KE7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0TE2K.tmp	is-E0KE7.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-E0KE7.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
816	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
976	RintFolders.exe
976	RintFolders.exe
976	RintFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	940	is-E0KE7.tmp
Token: SeBackupPrivilege	940	is-E0KE7.tmp
Token: SeDebugPrivilege	816	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 940	1696	file.exe	27
PID 1696 wrote to memory of 940	1696	file.exe	27
PID 1696 wrote to memory of 940	1696	file.exe	27
PID 1696 wrote to memory of 940	1696	file.exe	27
PID 1696 wrote to memory of 940	1696	file.exe	27
PID 1696 wrote to memory of 940	1696	file.exe	27
PID 1696 wrote to memory of 940	1696	file.exe	27
PID 940 wrote to memory of 976	940	is-E0KE7.tmp	28
PID 940 wrote to memory of 976	940	is-E0KE7.tmp	28
PID 940 wrote to memory of 976	940	is-E0KE7.tmp	28
PID 940 wrote to memory of 976	940	is-E0KE7.tmp	28
PID 940 wrote to memory of 976	940	is-E0KE7.tmp	28
PID 940 wrote to memory of 976	940	is-E0KE7.tmp	28
PID 940 wrote to memory of 976	940	is-E0KE7.tmp	28
PID 976 wrote to memory of 580	976	RintFolders.exe	29
PID 976 wrote to memory of 580	976	RintFolders.exe	29
PID 976 wrote to memory of 580	976	RintFolders.exe	29
PID 976 wrote to memory of 580	976	RintFolders.exe	29
PID 976 wrote to memory of 580	976	RintFolders.exe	29
PID 976 wrote to memory of 580	976	RintFolders.exe	29
PID 976 wrote to memory of 580	976	RintFolders.exe	29
PID 976 wrote to memory of 664	976	RintFolders.exe	32
PID 976 wrote to memory of 664	976	RintFolders.exe	32
PID 976 wrote to memory of 664	976	RintFolders.exe	32
PID 976 wrote to memory of 664	976	RintFolders.exe	32
PID 976 wrote to memory of 664	976	RintFolders.exe	32
PID 976 wrote to memory of 664	976	RintFolders.exe	32
PID 976 wrote to memory of 664	976	RintFolders.exe	32
PID 664 wrote to memory of 816	664	cmd.exe	34
PID 664 wrote to memory of 816	664	cmd.exe	34
PID 664 wrote to memory of 816	664	cmd.exe	34
PID 664 wrote to memory of 816	664	cmd.exe	34
PID 664 wrote to memory of 816	664	cmd.exe	34
PID 664 wrote to memory of 816	664	cmd.exe	34
PID 664 wrote to memory of 816	664	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:1696
- C:\Users\Admin\AppData\Local\Temp\is-5B748.tmp\is-E0KE7.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5B748.tmp\is-E0KE7.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2063918 73728
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:940
- - C:\Program Files (x86)\PrintFolders\RintFolders.exe
    "C:\Program Files (x86)\PrintFolders\RintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:976
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\VfRb7hrFR9ISjZ.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:580
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "RintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\RintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:664
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "RintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:816

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

RintFolders.exe

Path C:\Program Files (x86)\PrintFolders\RintFolders.exe
Size 3.3MB
SHA256 394e755ef0b157a7959a7666d2fef7249c3fabd9c1167f95d3723c848cb31b8a
MD5 75d93b713f52830997108da3699e391c
SHA1 53e01f81062a1c7881d83254f7d86632e8a8f969
SHA512 0b97014cc830e51d3a2c993afcaa491aaf97be106c72adb56f79ddda73503ac1cd68b6e940d5293176c0e29a6649b85f75718234de03e8e0d8ec8ce8062d692b
SSDEEP 98304:TgmxQ64dlDiTYcczclXp9INq76saZ2tOyM:/g
MD5 SHA1 SHA512 SSDEEP

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RintFolders.exe

Path C:\Program Files (x86)\PrintFolders\RintFolders.exe
Size 3.3MB
SHA256 394e755ef0b157a7959a7666d2fef7249c3fabd9c1167f95d3723c848cb31b8a
MD5 75d93b713f52830997108da3699e391c
SHA1 53e01f81062a1c7881d83254f7d86632e8a8f969
SHA512 0b97014cc830e51d3a2c993afcaa491aaf97be106c72adb56f79ddda73503ac1cd68b6e940d5293176c0e29a6649b85f75718234de03e8e0d8ec8ce8062d692b
SSDEEP 98304:TgmxQ64dlDiTYcczclXp9INq76saZ2tOyM:/g
MD5 SHA1 SHA512 SSDEEP

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is-E0KE7.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5B748.tmp\is-E0KE7.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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is-E0KE7.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5B748.tmp\is-E0KE7.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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VfRb7hrFR9ISjZ.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\VfRb7hrFR9ISjZ.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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VfRb7hrFR9ISjZ.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\VfRb7hrFR9ISjZ.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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RintFolders.exe

Path \Program Files (x86)\PrintFolders\RintFolders.exe
Size 3.3MB
SHA256 394e755ef0b157a7959a7666d2fef7249c3fabd9c1167f95d3723c848cb31b8a
MD5 75d93b713f52830997108da3699e391c
SHA1 53e01f81062a1c7881d83254f7d86632e8a8f969
SHA512 0b97014cc830e51d3a2c993afcaa491aaf97be106c72adb56f79ddda73503ac1cd68b6e940d5293176c0e29a6649b85f75718234de03e8e0d8ec8ce8062d692b
SSDEEP 98304:TgmxQ64dlDiTYcczclXp9INq76saZ2tOyM:/g
MD5 SHA1 SHA512 SSDEEP

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RintFolders.exe

Path \Program Files (x86)\PrintFolders\RintFolders.exe
Size 3.3MB
SHA256 394e755ef0b157a7959a7666d2fef7249c3fabd9c1167f95d3723c848cb31b8a
MD5 75d93b713f52830997108da3699e391c
SHA1 53e01f81062a1c7881d83254f7d86632e8a8f969
SHA512 0b97014cc830e51d3a2c993afcaa491aaf97be106c72adb56f79ddda73503ac1cd68b6e940d5293176c0e29a6649b85f75718234de03e8e0d8ec8ce8062d692b
SSDEEP 98304:TgmxQ64dlDiTYcczclXp9INq76saZ2tOyM:/g
MD5 SHA1 SHA512 SSDEEP

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RintFolders.exe

Path \Program Files (x86)\PrintFolders\RintFolders.exe
Size 3.3MB
SHA256 394e755ef0b157a7959a7666d2fef7249c3fabd9c1167f95d3723c848cb31b8a
MD5 75d93b713f52830997108da3699e391c
SHA1 53e01f81062a1c7881d83254f7d86632e8a8f969
SHA512 0b97014cc830e51d3a2c993afcaa491aaf97be106c72adb56f79ddda73503ac1cd68b6e940d5293176c0e29a6649b85f75718234de03e8e0d8ec8ce8062d692b
SSDEEP 98304:TgmxQ64dlDiTYcczclXp9INq76saZ2tOyM:/g
MD5 SHA1 SHA512 SSDEEP

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is-E0KE7.tmp

Path \Users\Admin\AppData\Local\Temp\is-5B748.tmp\is-E0KE7.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-OSEH7.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-OSEH7.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-OSEH7.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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VfRb7hrFR9ISjZ.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\VfRb7hrFR9ISjZ.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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VfRb7hrFR9ISjZ.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\VfRb7hrFR9ISjZ.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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VfRb7hrFR9ISjZ.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\VfRb7hrFR9ISjZ.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/940-73-0x0000000002F10000-0x000000000405A000-memory.dmp

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memory/940-90-0x0000000002F10000-0x000000000405A000-memory.dmp

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memory/976-75-0x0000000001B20000-0x0000000002C6A000-memory.dmp

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memory/976-93-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/976-77-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/976-76-0x0000000001B20000-0x0000000002C6A000-memory.dmp

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memory/976-97-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/976-74-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/976-86-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/976-91-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/976-92-0x0000000001B20000-0x0000000002C6A000-memory.dmp

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memory/976-78-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/1696-65-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/1696-55-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/1696-54-0x00000000766D1000-0x00000000766D3000-memory.dmp

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memory/1696-99-0x0000000000400000-0x0000000000418000-memory.dmp

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