nymaim | ce5af3b0de5438041b6fe17464d25a1023572d74a3851cebaa5670e30ed9ed6d

Analysis

max time kernel
149s
max time network
206s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
03/12/2022, 15:01

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 3.6MB
Sample221203-sdwa2aee4y
SHA256 ce5af3b0de5438041b6fe17464d25a1023572d74a3851cebaa5670e30ed9ed6d
MD5 88285e81d0f5a078eae78e16dde8efca
SHA1 a3784243505768aa19056c04a666af28d43690a8
SHA512 0b881f9201acb75014aa53b9a3a2bb951331b85d3774085016a70a0add1bf577700ae485d437c901823f010d1ef5e8c712338197453b3375f57f5ebf62f2957a
SSDEEP 98304:8+5aNAIvEEsK4LfXExr8mPTBEnAfFC8CMV6HgBeO38sXcyA:zasESX4rLPTB1fFXChHgB38sXcyA
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
1704	is-L2G7K.tmp
3684	PrintFolders.exe
2648	OU9GaX.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1704	is-L2G7K.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-00BQM.tmp	is-L2G7K.tmp
File created	C:\Program Files (x86)\PrintFolders\is-EDKO8.tmp	is-L2G7K.tmp
File created	C:\Program Files (x86)\PrintFolders\is-C33F0.tmp	is-L2G7K.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PLBHM.tmp	is-L2G7K.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-L2G7K.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-L2G7K.tmp
File created	C:\Program Files (x86)\PrintFolders\is-03G12.tmp	is-L2G7K.tmp
File created	C:\Program Files (x86)\PrintFolders\is-M430G.tmp	is-L2G7K.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-L2G7K.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
4648	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3684	PrintFolders.exe
3684	PrintFolders.exe
3684	PrintFolders.exe
3684	PrintFolders.exe
3684	PrintFolders.exe
3684	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3684	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4648	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3160 wrote to memory of 1704	3160	file.exe	82
PID 3160 wrote to memory of 1704	3160	file.exe	82
PID 3160 wrote to memory of 1704	3160	file.exe	82
PID 1704 wrote to memory of 3684	1704	is-L2G7K.tmp	84
PID 1704 wrote to memory of 3684	1704	is-L2G7K.tmp	84
PID 1704 wrote to memory of 3684	1704	is-L2G7K.tmp	84
PID 3684 wrote to memory of 2648	3684	PrintFolders.exe	86
PID 3684 wrote to memory of 2648	3684	PrintFolders.exe	86
PID 3684 wrote to memory of 2648	3684	PrintFolders.exe	86
PID 3684 wrote to memory of 4636	3684	PrintFolders.exe	93
PID 3684 wrote to memory of 4636	3684	PrintFolders.exe	93
PID 3684 wrote to memory of 4636	3684	PrintFolders.exe	93
PID 4636 wrote to memory of 4648	4636	cmd.exe	95
PID 4636 wrote to memory of 4648	4636	cmd.exe	95
PID 4636 wrote to memory of 4648	4636	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3160
- C:\Users\Admin\AppData\Local\Temp\is-AU001.tmp\is-L2G7K.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-AU001.tmp\is-L2G7K.tmp" /SL4 $A006C "C:\Users\Admin\AppData\Local\Temp\file.exe" 3504928 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1704
- - 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 behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:3684
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\OU9GaX.exe
      4⤵
      Executes dropped EXE
      PID:2648
  - - 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:4636
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4648

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

Loading Replay Monitor...

Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 5.9MB
SHA256 cf18487e812c4d960f2c7210dcd4de9ef06c179d4fba5a5c039c22e8946dfd05
MD5 e4e7c87f09e7e2d2ffd2ed0ebacfd16a
SHA1 e94435ef8788fef42e81f812e52d1b26b8622970
SHA512 52d96befdc3af9d6d9da9032cc8e9895e58aa986ad5833ad3a2e15387f699e035b34fa1ea8680658769bc1aaf152da7c282efff006bfb1f453e44b093230a044
SSDEEP 98304:SCryjd75PniyBESy0ORPfQy4N/BEIZLCid:SCro75FEHid
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 5.9MB
SHA256 cf18487e812c4d960f2c7210dcd4de9ef06c179d4fba5a5c039c22e8946dfd05
MD5 e4e7c87f09e7e2d2ffd2ed0ebacfd16a
SHA1 e94435ef8788fef42e81f812e52d1b26b8622970
SHA512 52d96befdc3af9d6d9da9032cc8e9895e58aa986ad5833ad3a2e15387f699e035b34fa1ea8680658769bc1aaf152da7c282efff006bfb1f453e44b093230a044
SSDEEP 98304:SCryjd75PniyBESy0ORPfQy4N/BEIZLCid:SCro75FEHid
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-L2G7K.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-AU001.tmp\is-L2G7K.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-L2G7K.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-AU001.tmp\is-L2G7K.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-JAPC8.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

OU9GaX.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\OU9GaX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

OU9GaX.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\OU9GaX.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3160-134-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/3160-156-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/3160-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/3684-143-0x0000000000400000-0x00000000017EF000-memory.dmp

Download

memory/3684-144-0x0000000000400000-0x00000000017EF000-memory.dmp

Download

memory/3684-142-0x0000000000400000-0x00000000017EF000-memory.dmp

Download

memory/3684-148-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/3684-152-0x0000000000400000-0x00000000017EF000-memory.dmp

Download

memory/3684-155-0x0000000000400000-0x00000000017EF000-memory.dmp

Download