nymaim | 4203df29237eead8680bd81a1533570772d8630fecbc9549749149dc6c04c7fb

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
26/11/2022, 03:16

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General

Target
file.exe
Size 1.5MB
Sample221126-dsf3bsgh32
SHA256 4203df29237eead8680bd81a1533570772d8630fecbc9549749149dc6c04c7fb
MD5 51b39a2ac5b032358cab02c5216f9f7f
SHA1 b73b6bf89afbe9fb0c73f98c27de0394680cf769
SHA512 580db83ca52a48feef0be3bdc71cb8e1298d43faa167e0d4543b9528d0517231e203600e38dde2e4230fc427c7fdf9ecec0e2c8923267cb6eb2cc3a699f73ee3
SSDEEP 24576:TizAsN22Udqb7Q3Bo2DOc18oLxpssDMgsLs2FFRPhhnyL2UttP68aFoVV8LAG5cK:8AINs3BTyc18oFPcRDyyUTIg6AG5cyJ
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
5084	is-GGHVN.tmp
1972	PrintFolders.exe
4872	SfeMxTICaynjag.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
5084	is-GGHVN.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-9I1RQ.tmp	is-GGHVN.tmp
File created	C:\Program Files (x86)\PrintFolders\is-OMKCU.tmp	is-GGHVN.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LD9TQ.tmp	is-GGHVN.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7CGQU.tmp	is-GGHVN.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9NJ85.tmp	is-GGHVN.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-GGHVN.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-GGHVN.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-GGHVN.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BUMTF.tmp	is-GGHVN.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
3760	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1972	PrintFolders.exe
1972	PrintFolders.exe
1972	PrintFolders.exe
1972	PrintFolders.exe
1972	PrintFolders.exe
1972	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3760	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2484 wrote to memory of 5084	2484	file.exe	76
PID 2484 wrote to memory of 5084	2484	file.exe	76
PID 2484 wrote to memory of 5084	2484	file.exe	76
PID 5084 wrote to memory of 1972	5084	is-GGHVN.tmp	77
PID 5084 wrote to memory of 1972	5084	is-GGHVN.tmp	77
PID 5084 wrote to memory of 1972	5084	is-GGHVN.tmp	77
PID 1972 wrote to memory of 4872	1972	PrintFolders.exe	78
PID 1972 wrote to memory of 4872	1972	PrintFolders.exe	78
PID 1972 wrote to memory of 4872	1972	PrintFolders.exe	78
PID 1972 wrote to memory of 4568	1972	PrintFolders.exe	90
PID 1972 wrote to memory of 4568	1972	PrintFolders.exe	90
PID 1972 wrote to memory of 4568	1972	PrintFolders.exe	90
PID 4568 wrote to memory of 3760	4568	cmd.exe	92
PID 4568 wrote to memory of 3760	4568	cmd.exe	92
PID 4568 wrote to memory of 3760	4568	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2484
- C:\Users\Admin\AppData\Local\Temp\is-G271T.tmp\is-GGHVN.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-G271T.tmp\is-GGHVN.tmp" /SL4 $801BE "C:\Users\Admin\AppData\Local\Temp\file.exe" 1304610 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:5084
- - 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:1972
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\SfeMxTICaynjag.exe
      4⤵
      Executes dropped EXE
      PID:4872
  - - 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:4568
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3760

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 1.7MB
SHA256 520020903141e8ecc8d84f57e9e70d4a3643e4c8b67e44e1e033237252b0c60c
MD5 771476082c726ac166e3b2e8e32adf00
SHA1 8ba40c0ec59490bbe65dff8d2ac9fad8028e772c
SHA512 424083b5b5dbca8fb9c8b38246ae54785d092c803f69919c76f9eee473f50cdebd2a0aca79d755a9ef2e02bbeb7604d4a06c5d03a95ece9519c510d8676d666b
SSDEEP 24576:nk/1lEIKqRqX0eDgSmBGRpZG2t/oe9EJ8/xgdBhnv1ixd1ttihuyna0Q:nk/PDqlYewdPnvS/tUhuWaT
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 520020903141e8ecc8d84f57e9e70d4a3643e4c8b67e44e1e033237252b0c60c
MD5 771476082c726ac166e3b2e8e32adf00
SHA1 8ba40c0ec59490bbe65dff8d2ac9fad8028e772c
SHA512 424083b5b5dbca8fb9c8b38246ae54785d092c803f69919c76f9eee473f50cdebd2a0aca79d755a9ef2e02bbeb7604d4a06c5d03a95ece9519c510d8676d666b
SSDEEP 24576:nk/1lEIKqRqX0eDgSmBGRpZG2t/oe9EJ8/xgdBhnv1ixd1ttihuyna0Q:nk/PDqlYewdPnvS/tUhuWaT
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-CDU22.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-GGHVN.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-G271T.tmp\is-GGHVN.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-GGHVN.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-G271T.tmp\is-GGHVN.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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SfeMxTICaynjag.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\SfeMxTICaynjag.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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SfeMxTICaynjag.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\SfeMxTICaynjag.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/1972-149-0x0000000000400000-0x00000000013B5000-memory.dmp

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memory/1972-150-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1972-156-0x0000000000400000-0x00000000013B5000-memory.dmp

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memory/1972-143-0x0000000000400000-0x00000000013B5000-memory.dmp

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memory/1972-144-0x0000000000400000-0x00000000013B5000-memory.dmp

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memory/1972-145-0x0000000000400000-0x00000000013B5000-memory.dmp

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memory/2484-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2484-139-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2484-134-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2484-157-0x0000000000400000-0x0000000000413000-memory.dmp

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