nymaim | 35c67543d22e57449a0d362c51d916f48b636a4bd0d18ceb0c844fa18bb084d5

Analysis

max time kernel
79s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
02/12/2022, 10:18

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General

Target
file.exe
Size 2.1MB
Sample221202-mbzmsabf2t
SHA256 35c67543d22e57449a0d362c51d916f48b636a4bd0d18ceb0c844fa18bb084d5
MD5 9785ceae7e5182c91fb0a8b247ca3c80
SHA1 434f370a466271699e30587ee169e4f5bad6895e
SHA512 662798f619f8d74f0a5ccdf33a930f848545851e6cebd85c8e3882cf8815daaca8664a8449cc3a1f8b52b5f799a88f9630c429ed2972bdbcf6c1451bffab4f62
SSDEEP 24576:TizWPI297k1q7OP8rFO1aztpAMjph9b94ojN2IyUFg6UgkHY6PvlcK5voGI7oLT3:8W5kC4STn9hBVguKpH3HTtAG5cyx
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
4596	is-07J9H.tmp
2652	PrintFolders.exe
3012	y7FzzFjtap5z.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4596	is-07J9H.tmp

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-21867.tmp	is-07J9H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-COVJ8.tmp	is-07J9H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SMRDO.tmp	is-07J9H.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-07J9H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-B7EVK.tmp	is-07J9H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3L3ER.tmp	is-07J9H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3HGGF.tmp	is-07J9H.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-07J9H.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-07J9H.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
1716	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2652	PrintFolders.exe
2652	PrintFolders.exe
2652	PrintFolders.exe
2652	PrintFolders.exe
2652	PrintFolders.exe
2652	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1716	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 4596	3068	file.exe	81
PID 3068 wrote to memory of 4596	3068	file.exe	81
PID 3068 wrote to memory of 4596	3068	file.exe	81
PID 4596 wrote to memory of 2652	4596	is-07J9H.tmp	82
PID 4596 wrote to memory of 2652	4596	is-07J9H.tmp	82
PID 4596 wrote to memory of 2652	4596	is-07J9H.tmp	82
PID 2652 wrote to memory of 3012	2652	PrintFolders.exe	86
PID 2652 wrote to memory of 3012	2652	PrintFolders.exe	86
PID 2652 wrote to memory of 3012	2652	PrintFolders.exe	86
PID 2652 wrote to memory of 2016	2652	PrintFolders.exe	91
PID 2652 wrote to memory of 2016	2652	PrintFolders.exe	91
PID 2652 wrote to memory of 2016	2652	PrintFolders.exe	91
PID 2016 wrote to memory of 1716	2016	cmd.exe	93
PID 2016 wrote to memory of 1716	2016	cmd.exe	93
PID 2016 wrote to memory of 1716	2016	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Users\Admin\AppData\Local\Temp\is-5AMT5.tmp\is-07J9H.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5AMT5.tmp\is-07J9H.tmp" /SL4 $E01BA "C:\Users\Admin\AppData\Local\Temp\file.exe" 1957703 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4596
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2652
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\y7FzzFjtap5z.exe
      4⤵
      Executes dropped EXE
      PID:3012
  - - 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:2016
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1716

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 c808eb68b042c7ee11524021830087c17bc4b28733d3adf1a563dc68b5eca93d
MD5 f89ef376973b16be127f1742754c011c
SHA1 a1bc9b7c79730f588d649e3e5279591a2f372a12
SHA512 1bf1fe3944818274b568bf6512878198ca0e28f5383e5a448fc55f69e000cc5953595e90539368c8501a6594ddc96cdf625d30928bc5467341eb9d9c03e1773b
SSDEEP 98304:ZPpxnb13S56h+3+oAkZeKLQOig03E7Yqw:ZPA8pr
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 c808eb68b042c7ee11524021830087c17bc4b28733d3adf1a563dc68b5eca93d
MD5 f89ef376973b16be127f1742754c011c
SHA1 a1bc9b7c79730f588d649e3e5279591a2f372a12
SHA512 1bf1fe3944818274b568bf6512878198ca0e28f5383e5a448fc55f69e000cc5953595e90539368c8501a6594ddc96cdf625d30928bc5467341eb9d9c03e1773b
SSDEEP 98304:ZPpxnb13S56h+3+oAkZeKLQOig03E7Yqw:ZPA8pr
MD5 SHA1 SHA512 SSDEEP

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is-07J9H.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5AMT5.tmp\is-07J9H.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-07J9H.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5AMT5.tmp\is-07J9H.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-A5TMK.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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y7FzzFjtap5z.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\y7FzzFjtap5z.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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y7FzzFjtap5z.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\y7FzzFjtap5z.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/2652-143-0x0000000000400000-0x0000000001550000-memory.dmp

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memory/2652-142-0x0000000000400000-0x0000000001550000-memory.dmp

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memory/2652-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2652-151-0x0000000000400000-0x0000000001550000-memory.dmp

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memory/2652-154-0x0000000000400000-0x0000000001550000-memory.dmp

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memory/3068-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3068-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3068-155-0x0000000000400000-0x0000000000413000-memory.dmp

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