nymaim | c134d47bc90683524baccfff9a7fb5ee6df277bd464f1d5828dc04db203b529b

Analysis

max time kernel
68s
max time network
72s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
27/11/2022, 00:31

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General

Target
file.exe
Size 2.2MB
Sample221127-at2tmsbb81
SHA256 c134d47bc90683524baccfff9a7fb5ee6df277bd464f1d5828dc04db203b529b
MD5 602b6026332c1c3ec5167d435342d6fd
SHA1 42975ac919769a64723b19b9b225e284925c8dee
SHA512 6bee262e1a058818e05d5b99486a716deaa5f9c20407d9f67d6a41164f69183f3cb61b6ef1685482e1d97e383767722a75368e62e1efe07f726cfe0f33ddbdb7
SSDEEP 49152:IkCyz7fz3zIzJMs7greojUe2z5PsvfDx0XUPqAG5cy2:IXyz7fzUas7goniDx0CqXcy2
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
1964	is-C6661.tmp
1196	PrintFolders.exe
1360	SffU5iCj.exe

Loads dropped DLL 10 IoCs

pid	Process
836	file.exe
1964	is-C6661.tmp
1964	is-C6661.tmp
1964	is-C6661.tmp
1964	is-C6661.tmp
1196	PrintFolders.exe
1196	PrintFolders.exe
1196	PrintFolders.exe
1360	SffU5iCj.exe
1360	SffU5iCj.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-6BLKB.tmp	is-C6661.tmp
File created	C:\Program Files (x86)\PrintFolders\is-92UT5.tmp	is-C6661.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-C6661.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-C6661.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-C6661.tmp
File created	C:\Program Files (x86)\PrintFolders\is-OQ0O3.tmp	is-C6661.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RFUHL.tmp	is-C6661.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KLH0D.tmp	is-C6661.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4OQJD.tmp	is-C6661.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
2032	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1196	PrintFolders.exe
1196	PrintFolders.exe
1196	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	1964	is-C6661.tmp
Token: SeBackupPrivilege	1964	is-C6661.tmp
Token: SeDebugPrivilege	2032	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 836 wrote to memory of 1964	836	file.exe	27
PID 836 wrote to memory of 1964	836	file.exe	27
PID 836 wrote to memory of 1964	836	file.exe	27
PID 836 wrote to memory of 1964	836	file.exe	27
PID 836 wrote to memory of 1964	836	file.exe	27
PID 836 wrote to memory of 1964	836	file.exe	27
PID 836 wrote to memory of 1964	836	file.exe	27
PID 1964 wrote to memory of 1196	1964	is-C6661.tmp	28
PID 1964 wrote to memory of 1196	1964	is-C6661.tmp	28
PID 1964 wrote to memory of 1196	1964	is-C6661.tmp	28
PID 1964 wrote to memory of 1196	1964	is-C6661.tmp	28
PID 1964 wrote to memory of 1196	1964	is-C6661.tmp	28
PID 1964 wrote to memory of 1196	1964	is-C6661.tmp	28
PID 1964 wrote to memory of 1196	1964	is-C6661.tmp	28
PID 1196 wrote to memory of 1360	1196	PrintFolders.exe	29
PID 1196 wrote to memory of 1360	1196	PrintFolders.exe	29
PID 1196 wrote to memory of 1360	1196	PrintFolders.exe	29
PID 1196 wrote to memory of 1360	1196	PrintFolders.exe	29
PID 1196 wrote to memory of 1360	1196	PrintFolders.exe	29
PID 1196 wrote to memory of 1360	1196	PrintFolders.exe	29
PID 1196 wrote to memory of 1360	1196	PrintFolders.exe	29
PID 1196 wrote to memory of 1460	1196	PrintFolders.exe	32
PID 1196 wrote to memory of 1460	1196	PrintFolders.exe	32
PID 1196 wrote to memory of 1460	1196	PrintFolders.exe	32
PID 1196 wrote to memory of 1460	1196	PrintFolders.exe	32
PID 1196 wrote to memory of 1460	1196	PrintFolders.exe	32
PID 1196 wrote to memory of 1460	1196	PrintFolders.exe	32
PID 1196 wrote to memory of 1460	1196	PrintFolders.exe	32
PID 1460 wrote to memory of 2032	1460	cmd.exe	34
PID 1460 wrote to memory of 2032	1460	cmd.exe	34
PID 1460 wrote to memory of 2032	1460	cmd.exe	34
PID 1460 wrote to memory of 2032	1460	cmd.exe	34
PID 1460 wrote to memory of 2032	1460	cmd.exe	34
PID 1460 wrote to memory of 2032	1460	cmd.exe	34
PID 1460 wrote to memory of 2032	1460	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:836
- C:\Users\Admin\AppData\Local\Temp\is-MCR7N.tmp\is-C6661.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-MCR7N.tmp\is-C6661.tmp" /SL4 $60120 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2061024 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1964
- - 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:1196
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\SffU5iCj.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1360
  - - 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:1460
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2032

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

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Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.5MB
SHA256 4672f0ea4c681c5b2c41191411e7bb1acbf59f4744f34f6e418a4c1268afee1d
MD5 eb0feaae3ff76ef9b6763887abb587cb
SHA1 d49ac8b1a2729177cabe473f45e9179abed43895
SHA512 cc50f7e03ea5c30324d81ce670c14c5f128b02a950e1391f7b482893a472145d2e04d155b98ff7223799f6cea31654e71e0da5e068d4612ff3cb3cc038447579
SSDEEP 98304:pJpcOf8zw5JneGWaglpRkVhbJT7SM8JEQxe:p/wGRHQA
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.5MB
SHA256 4672f0ea4c681c5b2c41191411e7bb1acbf59f4744f34f6e418a4c1268afee1d
MD5 eb0feaae3ff76ef9b6763887abb587cb
SHA1 d49ac8b1a2729177cabe473f45e9179abed43895
SHA512 cc50f7e03ea5c30324d81ce670c14c5f128b02a950e1391f7b482893a472145d2e04d155b98ff7223799f6cea31654e71e0da5e068d4612ff3cb3cc038447579
SSDEEP 98304:pJpcOf8zw5JneGWaglpRkVhbJT7SM8JEQxe:p/wGRHQA
MD5 SHA1 SHA512 SSDEEP

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is-C6661.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MCR7N.tmp\is-C6661.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-C6661.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MCR7N.tmp\is-C6661.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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SffU5iCj.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\SffU5iCj.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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SffU5iCj.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\SffU5iCj.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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PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.5MB
SHA256 4672f0ea4c681c5b2c41191411e7bb1acbf59f4744f34f6e418a4c1268afee1d
MD5 eb0feaae3ff76ef9b6763887abb587cb
SHA1 d49ac8b1a2729177cabe473f45e9179abed43895
SHA512 cc50f7e03ea5c30324d81ce670c14c5f128b02a950e1391f7b482893a472145d2e04d155b98ff7223799f6cea31654e71e0da5e068d4612ff3cb3cc038447579
SSDEEP 98304:pJpcOf8zw5JneGWaglpRkVhbJT7SM8JEQxe:p/wGRHQA
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.5MB
SHA256 4672f0ea4c681c5b2c41191411e7bb1acbf59f4744f34f6e418a4c1268afee1d
MD5 eb0feaae3ff76ef9b6763887abb587cb
SHA1 d49ac8b1a2729177cabe473f45e9179abed43895
SHA512 cc50f7e03ea5c30324d81ce670c14c5f128b02a950e1391f7b482893a472145d2e04d155b98ff7223799f6cea31654e71e0da5e068d4612ff3cb3cc038447579
SSDEEP 98304:pJpcOf8zw5JneGWaglpRkVhbJT7SM8JEQxe:p/wGRHQA
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path \Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.5MB
SHA256 4672f0ea4c681c5b2c41191411e7bb1acbf59f4744f34f6e418a4c1268afee1d
MD5 eb0feaae3ff76ef9b6763887abb587cb
SHA1 d49ac8b1a2729177cabe473f45e9179abed43895
SHA512 cc50f7e03ea5c30324d81ce670c14c5f128b02a950e1391f7b482893a472145d2e04d155b98ff7223799f6cea31654e71e0da5e068d4612ff3cb3cc038447579
SSDEEP 98304:pJpcOf8zw5JneGWaglpRkVhbJT7SM8JEQxe:p/wGRHQA
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-39TJ1.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-39TJ1.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-39TJ1.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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is-C6661.tmp

Path \Users\Admin\AppData\Local\Temp\is-MCR7N.tmp\is-C6661.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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SffU5iCj.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\SffU5iCj.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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SffU5iCj.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\SffU5iCj.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

SffU5iCj.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\SffU5iCj.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/836-54-0x0000000075AD1000-0x0000000075AD3000-memory.dmp

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memory/836-94-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/836-65-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/836-55-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/1196-89-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/1196-76-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/1196-75-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/1196-84-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/1196-85-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1196-92-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/1196-74-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/1964-73-0x0000000003050000-0x00000000041CB000-memory.dmp

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