nymaim | f02fb3b5fcc4d8383e1bf0955e8349f892d00a8e56ad1925e89a5933083e28a4

Analysis

max time kernel
150s
max time network
187s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
02/12/2022, 15:46

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General

Target
file.exe
Size 2.1MB
Sample221202-s7nhaafc71
SHA256 f02fb3b5fcc4d8383e1bf0955e8349f892d00a8e56ad1925e89a5933083e28a4
MD5 9a1ea8d2c7e18b25d39d7b97a09dbc22
SHA1 28711185f6964625ebbfde458a67cfb7c92fd878
SHA512 bfb921a7e7a2cdd29d460d89483d8f4d394de92b8739420321abc1330d38730ec486b9490aeda0bd0cf4975c5111c5f28a0ec9d49a8cbdfe38b6016de0127214
SSDEEP 49152:kb26Fy0wnBAYwah+FEswK+s+6xeBvx3LsAuoLBC5aE+PmCjRCVhnHeNiz+AG5cy8:kb2PmX/9wSnxeTb3jEaEo4v+N3Xcy8
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
2172	is-6KJ7F.tmp
4936	PrintFolders.exe
4412	LIEusjh.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2172	is-6KJ7F.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 opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-6KJ7F.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-6KJ7F.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RAPB5.tmp	is-6KJ7F.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HLVL5.tmp	is-6KJ7F.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6803D.tmp	is-6KJ7F.tmp
File created	C:\Program Files (x86)\PrintFolders\is-O65G0.tmp	is-6KJ7F.tmp
File created	C:\Program Files (x86)\PrintFolders\is-91DEL.tmp	is-6KJ7F.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8AH9U.tmp	is-6KJ7F.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-6KJ7F.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
4420	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4936	PrintFolders.exe
4936	PrintFolders.exe
4936	PrintFolders.exe
4936	PrintFolders.exe
4936	PrintFolders.exe
4936	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4420	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 404 wrote to memory of 2172	404	file.exe	80
PID 404 wrote to memory of 2172	404	file.exe	80
PID 404 wrote to memory of 2172	404	file.exe	80
PID 2172 wrote to memory of 4936	2172	is-6KJ7F.tmp	81
PID 2172 wrote to memory of 4936	2172	is-6KJ7F.tmp	81
PID 2172 wrote to memory of 4936	2172	is-6KJ7F.tmp	81
PID 4936 wrote to memory of 4412	4936	PrintFolders.exe	82
PID 4936 wrote to memory of 4412	4936	PrintFolders.exe	82
PID 4936 wrote to memory of 4412	4936	PrintFolders.exe	82
PID 4936 wrote to memory of 4840	4936	PrintFolders.exe	85
PID 4936 wrote to memory of 4840	4936	PrintFolders.exe	85
PID 4936 wrote to memory of 4840	4936	PrintFolders.exe	85
PID 4840 wrote to memory of 4420	4840	cmd.exe	87
PID 4840 wrote to memory of 4420	4840	cmd.exe	87
PID 4840 wrote to memory of 4420	4840	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:404
- C:\Users\Admin\AppData\Local\Temp\is-FDBQN.tmp\is-6KJ7F.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-FDBQN.tmp\is-6KJ7F.tmp" /SL4 $90064 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1962920 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2172
- - 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:4936
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\LIEusjh.exe
      4⤵
      Executes dropped EXE
      PID:4412
  - - 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:4840
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4420

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 6e1bb5c0519da8b2a33fceae5353e83a5315220eba7d8baf6f176c86e35326da
MD5 da694bb8500a55eb2731fce7cddd598a
SHA1 6fc8773ac793f69f331e1aeacb868b14b8423c0e
SHA512 219623433f86a24000fb92303e1001f5b00dca49b96a885fecc4a5199c27297edc6168f90c41faca24f987a155341d8efa338a200e875258f3ed8de2423fc958
SSDEEP 49152:ICjOxh+TLHXscoo1TBM0QT5HfNmMYm0KDEjHqFFWX:IidQcoo1G0QT5VTYmyKDWX
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 6e1bb5c0519da8b2a33fceae5353e83a5315220eba7d8baf6f176c86e35326da
MD5 da694bb8500a55eb2731fce7cddd598a
SHA1 6fc8773ac793f69f331e1aeacb868b14b8423c0e
SHA512 219623433f86a24000fb92303e1001f5b00dca49b96a885fecc4a5199c27297edc6168f90c41faca24f987a155341d8efa338a200e875258f3ed8de2423fc958
SSDEEP 49152:ICjOxh+TLHXscoo1TBM0QT5HfNmMYm0KDEjHqFFWX:IidQcoo1G0QT5VTYmyKDWX
MD5 SHA1 SHA512 SSDEEP

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is-6KJ7F.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-FDBQN.tmp\is-6KJ7F.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-6KJ7F.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-FDBQN.tmp\is-6KJ7F.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-JQ8RT.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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LIEusjh.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\LIEusjh.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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LIEusjh.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\LIEusjh.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/404-156-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/404-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/404-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4936-142-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/4936-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4936-152-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/4936-144-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/4936-143-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/4936-155-0x0000000000400000-0x0000000001552000-memory.dmp

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