nymaim | 72408da00f3254ff04c85b8d099888201b30cb0d7eba902dd57de4843b8816df

Analysis

max time kernel
70s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
19/12/2022, 00:01

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General

Target
file.exe
Size 2.4MB
Sample221219-aav7ragh7v
SHA256 72408da00f3254ff04c85b8d099888201b30cb0d7eba902dd57de4843b8816df
MD5 b178323a018d2656a6ea452678f7c2a4
SHA1 b2731ddcd0b8078aada8681fc33d011052902b6a
SHA512 a40eff7c3db02192f7569c74d494d6148d418d6bf3d7c58cd64d0fb7b49a133eda651540d751657c7711ac10bc70265f8300d1169946d6b081043765859fda6e
SSDEEP 49152:l0PBP81UFKobib7vNjmuiraNh+qEOvTaIM8iZKsPrYXk6yTRuSwjYGjYPR7O/d3N:l0PBPIMKDHieXE/+iZjPsITRuEGjYJQN
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
4908	is-MIG6N.tmp
2328	ocFolders.exe
1004	czS9dVeAdmLQP.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	ocFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4908	is-MIG6N.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-VIHEG.tmp	is-MIG6N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-EQ76Q.tmp	is-MIG6N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NPM6O.tmp	is-MIG6N.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-MIG6N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HK707.tmp	is-MIG6N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9C6QN.tmp	is-MIG6N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QH7TM.tmp	is-MIG6N.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-MIG6N.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ocFolders.exe	is-MIG6N.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
3788	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2328	ocFolders.exe
2328	ocFolders.exe
2328	ocFolders.exe
2328	ocFolders.exe
2328	ocFolders.exe
2328	ocFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3788	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1268 wrote to memory of 4908	1268	file.exe	84
PID 1268 wrote to memory of 4908	1268	file.exe	84
PID 1268 wrote to memory of 4908	1268	file.exe	84
PID 4908 wrote to memory of 2328	4908	is-MIG6N.tmp	85
PID 4908 wrote to memory of 2328	4908	is-MIG6N.tmp	85
PID 4908 wrote to memory of 2328	4908	is-MIG6N.tmp	85
PID 2328 wrote to memory of 1004	2328	ocFolders.exe	86
PID 2328 wrote to memory of 1004	2328	ocFolders.exe	86
PID 2328 wrote to memory of 1004	2328	ocFolders.exe	86
PID 2328 wrote to memory of 3924	2328	ocFolders.exe	94
PID 2328 wrote to memory of 3924	2328	ocFolders.exe	94
PID 2328 wrote to memory of 3924	2328	ocFolders.exe	94
PID 3924 wrote to memory of 3788	3924	cmd.exe	96
PID 3924 wrote to memory of 3788	3924	cmd.exe	96
PID 3924 wrote to memory of 3788	3924	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1268
- C:\Users\Admin\AppData\Local\Temp\is-DM6FO.tmp\is-MIG6N.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-DM6FO.tmp\is-MIG6N.tmp" /SL4 $8006A "C:\Users\Admin\AppData\Local\Temp\file.exe" 2270628 169984
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4908
- - C:\Program Files (x86)\PrintFolders\ocFolders.exe
    "C:\Program Files (x86)\PrintFolders\ocFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2328
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\czS9dVeAdmLQP.exe
      4⤵
      Executes dropped EXE
      PID:1004
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ocFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\ocFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3924
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ocFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3788

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

ocFolders.exe

Path C:\Program Files (x86)\PrintFolders\ocFolders.exe
Size 3.7MB
SHA256 b03115cb69846c0abb99fc1d147970fc776d68c90b8675e00469f9ea742645eb
MD5 4cc977b46fee78a0052d08a9514d5eec
SHA1 1322306f0f5b30cfc092a55ee83bd1120d30f631
SHA512 dd27985bc343c6c4ba770baf82bdf8f16159a213e23e7dc8b441165899201187afd4563ab61ba23994ca1f5f153c17083fb5fb2e22aadcb97199d7becb52bf8d
SSDEEP 98304:uN1ga5ZtPFz5ffhPBT6csIgAJYlvlL0EepdQDjtzTd:cB5Dff1+d
MD5 SHA1 SHA512 SSDEEP

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ocFolders.exe

Path C:\Program Files (x86)\PrintFolders\ocFolders.exe
Size 3.7MB
SHA256 b03115cb69846c0abb99fc1d147970fc776d68c90b8675e00469f9ea742645eb
MD5 4cc977b46fee78a0052d08a9514d5eec
SHA1 1322306f0f5b30cfc092a55ee83bd1120d30f631
SHA512 dd27985bc343c6c4ba770baf82bdf8f16159a213e23e7dc8b441165899201187afd4563ab61ba23994ca1f5f153c17083fb5fb2e22aadcb97199d7becb52bf8d
SSDEEP 98304:uN1ga5ZtPFz5ffhPBT6csIgAJYlvlL0EepdQDjtzTd:cB5Dff1+d
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-5C75O.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-MIG6N.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-DM6FO.tmp\is-MIG6N.tmp
Size 759KB
SHA256 2d4703dac05e8e6d136a8173f84d2618b54b6e7ef44ae5557350614bbb5a9797
MD5 d35c838e416f6a317c90117cc834b92b
SHA1 289a030cc78131163a8d6bc3c5dd831ac0f962a1
SHA512 9a50f934c199b4415911cae873cebd46f682526290b41a42a882a580fed67c99f5248abfbaa367f20b471564b4cf6d62f28ed2c945206267b37788f94377f167
SSDEEP 12288:dh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv+PBexOi:D5NoqWolrP837JzHvA6yknyWFxv+PBeH
MD5 SHA1 SHA512 SSDEEP

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is-MIG6N.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-DM6FO.tmp\is-MIG6N.tmp
Size 759KB
SHA256 2d4703dac05e8e6d136a8173f84d2618b54b6e7ef44ae5557350614bbb5a9797
MD5 d35c838e416f6a317c90117cc834b92b
SHA1 289a030cc78131163a8d6bc3c5dd831ac0f962a1
SHA512 9a50f934c199b4415911cae873cebd46f682526290b41a42a882a580fed67c99f5248abfbaa367f20b471564b4cf6d62f28ed2c945206267b37788f94377f167
SSDEEP 12288:dh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv+PBexOi:D5NoqWolrP837JzHvA6yknyWFxv+PBeH
MD5 SHA1 SHA512 SSDEEP

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czS9dVeAdmLQP.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\czS9dVeAdmLQP.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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czS9dVeAdmLQP.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\czS9dVeAdmLQP.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/1268-155-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/1268-137-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/1268-132-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/2328-143-0x0000000000400000-0x00000000015B0000-memory.dmp

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memory/2328-142-0x0000000000400000-0x00000000015B0000-memory.dmp

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memory/2328-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2328-151-0x0000000000400000-0x00000000015B0000-memory.dmp

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memory/2328-154-0x0000000000400000-0x00000000015B0000-memory.dmp

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