nymaim | 70eca4a5d39e688f3be1ee36f5ddf0ccdaece0954c1afac0432aa6615ddce540

Analysis

max time kernel
90s
max time network
93s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
15/12/2022, 16:17

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General

Target
file.exe
Size 2.2MB
Sample221215-trclhsfg2x
SHA256 70eca4a5d39e688f3be1ee36f5ddf0ccdaece0954c1afac0432aa6615ddce540
MD5 deff2251bf20de4d2695e59b891e84e1
SHA1 4eec2da92fa2e4aac0f716a739c04abcd14b6ca2
SHA512 0e02d0a35c01a6ce48f269d78089313e86f7187cd2c6ba12e61aefbbd6699895e70acabef286c144a3a127752d6c9e33a0dc49aa8e9e6610d9720314a283deb5
SSDEEP 49152:cNur/bLkfNze5Nq2nEhGtZxuQej5h37lwnUk3pkU4aAPp/EqeOCgSY/O:cNy/fkfw3qkzbxuQej77lFU45h/EqcYG
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
4888	is-91JMO.tmp
400	nzFolders.exe
4716	ieg2q.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	nzFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4888	is-91JMO.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-CSJOB.tmp	is-91JMO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SKSAD.tmp	is-91JMO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-M28AE.tmp	is-91JMO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AJ3CQ.tmp	is-91JMO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1NE3U.tmp	is-91JMO.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-91JMO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5OA6L.tmp	is-91JMO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-91JMO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nzFolders.exe	is-91JMO.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
4404	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
400	nzFolders.exe
400	nzFolders.exe
400	nzFolders.exe
400	nzFolders.exe
400	nzFolders.exe
400	nzFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4404	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4668 wrote to memory of 4888	4668	file.exe	78
PID 4668 wrote to memory of 4888	4668	file.exe	78
PID 4668 wrote to memory of 4888	4668	file.exe	78
PID 4888 wrote to memory of 400	4888	is-91JMO.tmp	79
PID 4888 wrote to memory of 400	4888	is-91JMO.tmp	79
PID 4888 wrote to memory of 400	4888	is-91JMO.tmp	79
PID 400 wrote to memory of 4716	400	nzFolders.exe	82
PID 400 wrote to memory of 4716	400	nzFolders.exe	82
PID 400 wrote to memory of 4716	400	nzFolders.exe	82
PID 400 wrote to memory of 1664	400	nzFolders.exe	88
PID 400 wrote to memory of 1664	400	nzFolders.exe	88
PID 400 wrote to memory of 1664	400	nzFolders.exe	88
PID 1664 wrote to memory of 4404	1664	cmd.exe	90
PID 1664 wrote to memory of 4404	1664	cmd.exe	90
PID 1664 wrote to memory of 4404	1664	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4668
- C:\Users\Admin\AppData\Local\Temp\is-K7184.tmp\is-91JMO.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-K7184.tmp\is-91JMO.tmp" /SL4 $90056 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2078627 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4888
- - C:\Program Files (x86)\PrintFolders\nzFolders.exe
    "C:\Program Files (x86)\PrintFolders\nzFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:400
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\ieg2q.exe
      4⤵
      Executes dropped EXE
      PID:4716
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nzFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nzFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1664
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nzFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4404

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

nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 e989d471d1e888f8d95414b49d52a9c721789d242fe1aa8cd621418d8353ecac
MD5 a892b595604f8ca941fd80481bf12b49
SHA1 663e1530a0b46e24a1f976d495aa1e86ce3766a9
SHA512 f7c2c2585e9366d448128ea6ad3de0b6c0032d340b1c464ec1aef4c1a90120312866aff716949dfcbf794b8eda5e251d9ce8b2072148e1e87e59b7d9e683e436
SSDEEP 49152:Y71sKYrbsVfpdyzZSHhD/rGX+S2S3k4wCQTwM3:Y71sKYrbEfpdytahD/rGXP2S3kNFTwM3
MD5 SHA1 SHA512 SSDEEP

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nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 e989d471d1e888f8d95414b49d52a9c721789d242fe1aa8cd621418d8353ecac
MD5 a892b595604f8ca941fd80481bf12b49
SHA1 663e1530a0b46e24a1f976d495aa1e86ce3766a9
SHA512 f7c2c2585e9366d448128ea6ad3de0b6c0032d340b1c464ec1aef4c1a90120312866aff716949dfcbf794b8eda5e251d9ce8b2072148e1e87e59b7d9e683e436
SSDEEP 49152:Y71sKYrbsVfpdyzZSHhD/rGX+S2S3k4wCQTwM3:Y71sKYrbEfpdytahD/rGXP2S3kNFTwM3
MD5 SHA1 SHA512 SSDEEP

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is-91JMO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-K7184.tmp\is-91JMO.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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is-91JMO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-K7184.tmp\is-91JMO.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-RV624.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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ieg2q.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\ieg2q.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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ieg2q.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\ieg2q.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/400-143-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/400-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/400-142-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/400-155-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/400-152-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/4668-134-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4668-151-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4668-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4668-156-0x0000000000400000-0x0000000000439000-memory.dmp

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