nymaim | 264b8d388387e8fb0df7151749a35f73bb8a60292990293e23f1c4fbbd4704bf

Analysis

max time kernel
150s
max time network
187s
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, 11:01

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General

Target
file.exe
Size 2.2MB
Sample221208-m4llmacg2y
SHA256 264b8d388387e8fb0df7151749a35f73bb8a60292990293e23f1c4fbbd4704bf
MD5 a70c8dbd9e460e5f58054f619c8c3001
SHA1 14cc214d042430978e8d01064426937c4000f74f
SHA512 7f9738a3a6d433f5520387c116388f4a4446169a4ea52e1f4b69b38242959b6ec2b2bf33f8b983f350da406f0f643d3e0eb2fad985d4b0e210719256e9b318ef
SSDEEP 49152:+qNDUYndznr+/H2NDNcLckeK7N9m7Kxqbjpm1ZiSZwN41ki:+qiQDMC55Q9Nq3pIZbZ
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
4664	is-92U8Q.tmp
5112	IntFolders.exe
4872	oZNVM.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	IntFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4664	is-92U8Q.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-KOGPG.tmp	is-92U8Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-G0L8V.tmp	is-92U8Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SR54J.tmp	is-92U8Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-EMEQU.tmp	is-92U8Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KVC62.tmp	is-92U8Q.tmp
File created	C:\Program Files (x86)\PrintFolders\is-24VUL.tmp	is-92U8Q.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-92U8Q.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\IntFolders.exe	is-92U8Q.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-92U8Q.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
116	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5112	IntFolders.exe
5112	IntFolders.exe
5112	IntFolders.exe
5112	IntFolders.exe
5112	IntFolders.exe
5112	IntFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5112	IntFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	116	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3952 wrote to memory of 4664	3952	file.exe	80
PID 3952 wrote to memory of 4664	3952	file.exe	80
PID 3952 wrote to memory of 4664	3952	file.exe	80
PID 4664 wrote to memory of 5112	4664	is-92U8Q.tmp	81
PID 4664 wrote to memory of 5112	4664	is-92U8Q.tmp	81
PID 4664 wrote to memory of 5112	4664	is-92U8Q.tmp	81
PID 5112 wrote to memory of 4872	5112	IntFolders.exe	82
PID 5112 wrote to memory of 4872	5112	IntFolders.exe	82
PID 5112 wrote to memory of 4872	5112	IntFolders.exe	82
PID 5112 wrote to memory of 4444	5112	IntFolders.exe	85
PID 5112 wrote to memory of 4444	5112	IntFolders.exe	85
PID 5112 wrote to memory of 4444	5112	IntFolders.exe	85
PID 4444 wrote to memory of 116	4444	cmd.exe	87
PID 4444 wrote to memory of 116	4444	cmd.exe	87
PID 4444 wrote to memory of 116	4444	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:3952
- C:\Users\Admin\AppData\Local\Temp\is-I9DME.tmp\is-92U8Q.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-I9DME.tmp\is-92U8Q.tmp" /SL4 $601F0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2076046 73728
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4664
- - 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 behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:5112
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\oZNVM.exe
      4⤵
      Executes dropped EXE
      PID:4872
  - - 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:4444
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "IntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:116

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

IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.3MB
SHA256 b7b429b31911c5acc487f3d22d806e5a64269e935e8444db66d03d64b89a598b
MD5 baacd1f6639d425a1d7fa86004c634e0
SHA1 03af0a22cd2a50e1e2627778cad8f90210eef796
SHA512 d506b1cf19ff2c3f6d2b2c2a07f75099d4631d9cc87af8d48128814a8c1535d0532d0085fcbe7efcdc8668185e72221543be58d91dfbd78063de9a78bd513766
SSDEEP 49152:CdylSYCcy7I6y3FCILCFt6sCZeS0PGzj1g:C4lSYCcy7u1XLCFt6sCZehGzS
MD5 SHA1 SHA512 SSDEEP

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IntFolders.exe

Path C:\Program Files (x86)\PrintFolders\IntFolders.exe
Size 3.3MB
SHA256 b7b429b31911c5acc487f3d22d806e5a64269e935e8444db66d03d64b89a598b
MD5 baacd1f6639d425a1d7fa86004c634e0
SHA1 03af0a22cd2a50e1e2627778cad8f90210eef796
SHA512 d506b1cf19ff2c3f6d2b2c2a07f75099d4631d9cc87af8d48128814a8c1535d0532d0085fcbe7efcdc8668185e72221543be58d91dfbd78063de9a78bd513766
SSDEEP 49152:CdylSYCcy7I6y3FCILCFt6sCZeS0PGzj1g:C4lSYCcy7u1XLCFt6sCZehGzS
MD5 SHA1 SHA512 SSDEEP

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is-92U8Q.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-I9DME.tmp\is-92U8Q.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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is-92U8Q.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-I9DME.tmp\is-92U8Q.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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oZNVM.exe

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

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\oZNVM.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/3952-132-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/3952-157-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/3952-145-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/3952-134-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/5112-142-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/5112-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/5112-153-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/5112-144-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/5112-156-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/5112-143-0x0000000000400000-0x000000000154A000-memory.dmp

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