nymaim | c2380dbaab1c719776e1dcebc6866ddeeb323dc8dc80b172c8afd331034682c9

Analysis

max time kernel
147s
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
27/11/2022, 03:32

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General

Target
file.exe
Size 2.0MB
Sample221127-d3l2bsba8z
SHA256 c2380dbaab1c719776e1dcebc6866ddeeb323dc8dc80b172c8afd331034682c9
MD5 30a1975135fc82d98e8f8e7e783e8535
SHA1 82ff6fd9859c0736666988fbf7e92fcf82a74f24
SHA512 b30c5dcd01bb711dc41bbb904557f740752fa4bef988bfd6375268112e1f7f61e06931017e9f6ea98b75c9cc967243c8203f7b4fbc1c6a44c7022451f6aa19c7
SSDEEP 49152:En5GurtJFEAVWMbn6gyciqhjst0yN0l5AG5cyk:E5GurtfXXViq1rjXcyk
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
2244	is-O4PA8.tmp
3584	PrintFolders.exe
5076	F8N0q75HDlP.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
2244	is-O4PA8.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\unins000.dat	is-O4PA8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4G4QV.tmp	is-O4PA8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4QIUJ.tmp	is-O4PA8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-F60NV.tmp	is-O4PA8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I9U0L.tmp	is-O4PA8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5J73G.tmp	is-O4PA8.tmp
File created	C:\Program Files (x86)\PrintFolders\is-H2HR3.tmp	is-O4PA8.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-O4PA8.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-O4PA8.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
1952	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3584	PrintFolders.exe
3584	PrintFolders.exe
3584	PrintFolders.exe
3584	PrintFolders.exe
3584	PrintFolders.exe
3584	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3584	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1952	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 876 wrote to memory of 2244	876	file.exe	80
PID 876 wrote to memory of 2244	876	file.exe	80
PID 876 wrote to memory of 2244	876	file.exe	80
PID 2244 wrote to memory of 3584	2244	is-O4PA8.tmp	81
PID 2244 wrote to memory of 3584	2244	is-O4PA8.tmp	81
PID 2244 wrote to memory of 3584	2244	is-O4PA8.tmp	81
PID 3584 wrote to memory of 5076	3584	PrintFolders.exe	82
PID 3584 wrote to memory of 5076	3584	PrintFolders.exe	82
PID 3584 wrote to memory of 5076	3584	PrintFolders.exe	82
PID 3584 wrote to memory of 4088	3584	PrintFolders.exe	84
PID 3584 wrote to memory of 4088	3584	PrintFolders.exe	84
PID 3584 wrote to memory of 4088	3584	PrintFolders.exe	84
PID 4088 wrote to memory of 1952	4088	cmd.exe	86
PID 4088 wrote to memory of 1952	4088	cmd.exe	86
PID 4088 wrote to memory of 1952	4088	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:876
- C:\Users\Admin\AppData\Local\Temp\is-59OBT.tmp\is-O4PA8.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-59OBT.tmp\is-O4PA8.tmp" /SL4 $301B8 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1858569 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2244
- - 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:3584
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\F8N0q75HDlP.exe
      4⤵
      Executes dropped EXE
      PID:5076
  - - 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:4088
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1952

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 3.1MB
SHA256 376ba5fa83dd00e854f9ad31632cb30fd137666b949f44462327777448f1a62e
MD5 1a4b565c860120246fdb2c788521ecaa
SHA1 5bac48fa981a5b593c61c37597352b875275a718
SHA512 1c94037f002747c5f5d5c7535d49f0937976efd7aebbb886ff2b35bb040515dcaba56c2a9edfb0cf18cb5e7eaa32337ba981b103d53a1b1b79148697d1853722
SSDEEP 49152:UIUtAmO2g2avqg7OnOANeG64D2immYY8g2p3:UIUtAmOX2ayg7zk64D2iNYY8ge3
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.1MB
SHA256 376ba5fa83dd00e854f9ad31632cb30fd137666b949f44462327777448f1a62e
MD5 1a4b565c860120246fdb2c788521ecaa
SHA1 5bac48fa981a5b593c61c37597352b875275a718
SHA512 1c94037f002747c5f5d5c7535d49f0937976efd7aebbb886ff2b35bb040515dcaba56c2a9edfb0cf18cb5e7eaa32337ba981b103d53a1b1b79148697d1853722
SSDEEP 49152:UIUtAmO2g2avqg7OnOANeG64D2immYY8g2p3:UIUtAmOX2ayg7zk64D2iNYY8ge3
MD5 SHA1 SHA512 SSDEEP

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is-O4PA8.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-59OBT.tmp\is-O4PA8.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-O4PA8.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-59OBT.tmp\is-O4PA8.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-8V1KU.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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F8N0q75HDlP.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\F8N0q75HDlP.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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F8N0q75HDlP.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\F8N0q75HDlP.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/876-141-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/876-159-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/876-135-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3584-146-0x0000000000400000-0x0000000001513000-memory.dmp

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memory/3584-147-0x0000000000400000-0x0000000001513000-memory.dmp

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memory/3584-151-0x0000000000400000-0x0000000001513000-memory.dmp

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memory/3584-152-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3584-145-0x0000000000400000-0x0000000001513000-memory.dmp

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memory/3584-158-0x0000000000400000-0x0000000001513000-memory.dmp

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