nymaim | 45fc70cb1f189233a8c1509e1fce188b8479a3560f26a2b34a57ed46f34b4694

Analysis

max time kernel
94s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
08/12/2022, 20:33

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General

Target
file.exe
Size 2.4MB
Sample221208-zbwmcabd72
SHA256 45fc70cb1f189233a8c1509e1fce188b8479a3560f26a2b34a57ed46f34b4694
MD5 e931284758e7fead27cd6b453cd93ed5
SHA1 b2bee50fa46f090b8d95547f91901cc797f5d28f
SHA512 a61af29e8b8d9909262fa06eb3fbb6cad1ef22d77e603a97249c3d3a5e45b88c9341bcfe75605985d2c1991d695e07b77c7d782fadd00b89a7d4f86b38dd2c1d
SSDEEP 49152:aDsgAqOYinN2sZAsXkgUCOTvKJQjjzyn5TqXe4+w1MZwN41k4:aogVF2VZPXRUIJQ3omXe4+cMr
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
404	is-18JMD.tmp
4912	IntFolders.exe
2416	biU9MsHNT.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	IntFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
404	is-18JMD.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-2NAJS.tmp	is-18JMD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GULMG.tmp	is-18JMD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PG91N.tmp	is-18JMD.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\IntFolders.exe	is-18JMD.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-18JMD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-D0LK3.tmp	is-18JMD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-S8B0F.tmp	is-18JMD.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UUHU0.tmp	is-18JMD.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-18JMD.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
324	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4912	IntFolders.exe
4912	IntFolders.exe
4912	IntFolders.exe
4912	IntFolders.exe
4912	IntFolders.exe
4912	IntFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	324	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 404	2168	file.exe	80
PID 2168 wrote to memory of 404	2168	file.exe	80
PID 2168 wrote to memory of 404	2168	file.exe	80
PID 404 wrote to memory of 4912	404	is-18JMD.tmp	81
PID 404 wrote to memory of 4912	404	is-18JMD.tmp	81
PID 404 wrote to memory of 4912	404	is-18JMD.tmp	81
PID 4912 wrote to memory of 2416	4912	IntFolders.exe	82
PID 4912 wrote to memory of 2416	4912	IntFolders.exe	82
PID 4912 wrote to memory of 2416	4912	IntFolders.exe	82
PID 4912 wrote to memory of 760	4912	IntFolders.exe	85
PID 4912 wrote to memory of 760	4912	IntFolders.exe	85
PID 4912 wrote to memory of 760	4912	IntFolders.exe	85
PID 760 wrote to memory of 324	760	cmd.exe	87
PID 760 wrote to memory of 324	760	cmd.exe	87
PID 760 wrote to memory of 324	760	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Local\Temp\is-D1MG1.tmp\is-18JMD.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-D1MG1.tmp\is-18JMD.tmp" /SL4 $501C0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2245910 73728
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:404
- - C:\Program Files (x86)\PrintFolders\IntFolders.exe
    "C:\Program Files (x86)\PrintFolders\IntFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4912
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\biU9MsHNT.exe
      4⤵
      Executes dropped EXE
      PID:2416
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "IntFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\IntFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:760
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "IntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:324

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

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Downloads

IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.5MB
SHA256 dd6dd4dd1960486c9bc2124b05c47fe2ee35320eac55b74e4b331ed58697a519
MD5 7b331d282659ce0b99e24740c554a3c1
SHA1 914648f349ef95b0d22d46d6d0a9a5e36f0db315
SHA512 e85f53f3df5131c0cfc6dc8c506c153a4deea4a7229208e0075847ec3d5eb53af8241c46f505a68de2145cb4a3d4025fdd2385fe03203fea9719f50ff2f8fa7d
SSDEEP 98304:0lWVJh3w88HtMW7KDRc9BPcMQd7+T8ocisw:M
MD5 SHA1 SHA512 SSDEEP

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IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.5MB
SHA256 dd6dd4dd1960486c9bc2124b05c47fe2ee35320eac55b74e4b331ed58697a519
MD5 7b331d282659ce0b99e24740c554a3c1
SHA1 914648f349ef95b0d22d46d6d0a9a5e36f0db315
SHA512 e85f53f3df5131c0cfc6dc8c506c153a4deea4a7229208e0075847ec3d5eb53af8241c46f505a68de2145cb4a3d4025fdd2385fe03203fea9719f50ff2f8fa7d
SSDEEP 98304:0lWVJh3w88HtMW7KDRc9BPcMQd7+T8ocisw:M
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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is-18JMD.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-D1MG1.tmp\is-18JMD.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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is-18JMD.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-D1MG1.tmp\is-18JMD.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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biU9MsHNT.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\biU9MsHNT.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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biU9MsHNT.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\biU9MsHNT.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/2168-136-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/2168-132-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/2168-156-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/4912-143-0x0000000000400000-0x000000000157C000-memory.dmp

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memory/4912-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4912-152-0x0000000000400000-0x000000000157C000-memory.dmp

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memory/4912-144-0x0000000000400000-0x000000000157C000-memory.dmp

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memory/4912-142-0x0000000000400000-0x000000000157C000-memory.dmp

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memory/4912-155-0x0000000000400000-0x000000000157C000-memory.dmp

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