nymaim | a121f703dffa60686f44d0222d271e0046b005f0d9973bfa00be72510754e560

Analysis

max time kernel
91s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/12/2022, 08:16

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General

Target
file.exe
Size 2.2MB
Sample221207-j548kshg62
SHA256 a121f703dffa60686f44d0222d271e0046b005f0d9973bfa00be72510754e560
MD5 c9307a2cda6e85b243d5ba5a5c388d00
SHA1 dc85bd3b789e717978a6161fd0bcc1a53c838d84
SHA512 8d4f0aae90bc176e0285079cdeabb5fa89b47bd7134562dbe32509f9fc5e96e93ea0976d03c73422d8a770512d89c5b4b74341dab5bbf1c623bdd3ec481f3b98
SSDEEP 49152:unKNRWxkm4ryG21v0Fd3Gas1z2r5RsI/ATYo9OEHCZwN41kg:unK3st4WG6z0ii/
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
1332	is-314KT.tmp
2800	RintFolders.exe
5068	gaQKJRKlpp.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	RintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1332	is-314KT.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-314KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RUEOF.tmp	is-314KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I6689.tmp	is-314KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6IHNH.tmp	is-314KT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\RintFolders.exe	is-314KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HL9AN.tmp	is-314KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PBD5V.tmp	is-314KT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0L155.tmp	is-314KT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-314KT.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
3272	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2800	RintFolders.exe
2800	RintFolders.exe
2800	RintFolders.exe
2800	RintFolders.exe
2800	RintFolders.exe
2800	RintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3272	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4656 wrote to memory of 1332	4656	file.exe	79
PID 4656 wrote to memory of 1332	4656	file.exe	79
PID 4656 wrote to memory of 1332	4656	file.exe	79
PID 1332 wrote to memory of 2800	1332	is-314KT.tmp	80
PID 1332 wrote to memory of 2800	1332	is-314KT.tmp	80
PID 1332 wrote to memory of 2800	1332	is-314KT.tmp	80
PID 2800 wrote to memory of 5068	2800	RintFolders.exe	81
PID 2800 wrote to memory of 5068	2800	RintFolders.exe	81
PID 2800 wrote to memory of 5068	2800	RintFolders.exe	81
PID 2800 wrote to memory of 1248	2800	RintFolders.exe	90
PID 2800 wrote to memory of 1248	2800	RintFolders.exe	90
PID 2800 wrote to memory of 1248	2800	RintFolders.exe	90
PID 1248 wrote to memory of 3272	1248	cmd.exe	92
PID 1248 wrote to memory of 3272	1248	cmd.exe	92
PID 1248 wrote to memory of 3272	1248	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:4656
- C:\Users\Admin\AppData\Local\Temp\is-14KP1.tmp\is-314KT.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-14KP1.tmp\is-314KT.tmp" /SL4 $E0048 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2063918 73728
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1332
- - C:\Program Files (x86)\PrintFolders\RintFolders.exe
    "C:\Program Files (x86)\PrintFolders\RintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2800
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\gaQKJRKlpp.exe
      4⤵
      Executes dropped EXE
      PID:5068
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "RintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\RintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1248
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "RintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3272

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

RintFolders.exe

Path C:\Program Files (x86)\PrintFolders\RintFolders.exe
Size 3.3MB
SHA256 394e755ef0b157a7959a7666d2fef7249c3fabd9c1167f95d3723c848cb31b8a
MD5 75d93b713f52830997108da3699e391c
SHA1 53e01f81062a1c7881d83254f7d86632e8a8f969
SHA512 0b97014cc830e51d3a2c993afcaa491aaf97be106c72adb56f79ddda73503ac1cd68b6e940d5293176c0e29a6649b85f75718234de03e8e0d8ec8ce8062d692b
SSDEEP 98304:TgmxQ64dlDiTYcczclXp9INq76saZ2tOyM:/g
MD5 SHA1 SHA512 SSDEEP

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RintFolders.exe

Path C:\Program Files (x86)\PrintFolders\RintFolders.exe
Size 3.3MB
SHA256 394e755ef0b157a7959a7666d2fef7249c3fabd9c1167f95d3723c848cb31b8a
MD5 75d93b713f52830997108da3699e391c
SHA1 53e01f81062a1c7881d83254f7d86632e8a8f969
SHA512 0b97014cc830e51d3a2c993afcaa491aaf97be106c72adb56f79ddda73503ac1cd68b6e940d5293176c0e29a6649b85f75718234de03e8e0d8ec8ce8062d692b
SSDEEP 98304:TgmxQ64dlDiTYcczclXp9INq76saZ2tOyM:/g
MD5 SHA1 SHA512 SSDEEP

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is-314KT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-14KP1.tmp\is-314KT.tmp
Size 665KB
SHA256 2a841ad3820292ff2ab96429635062d0984d0b221e8bd7650777a1c51043b722
MD5 21efb90aabcda42c1232f008bd66fd99
SHA1 563835721536bbd8310eb1dc2fa18966ddffff3d
SHA512 106432d5d58bd2f904cbb9f28771c7b95ccbdd7cdf506b190f5968dbf552ae4ed54cd2f46624ab47cc730c565b7d8d7de7cc51609540df05d0a46c932c20c36e
SSDEEP 12288:/h5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvX4xO6:p5NoqWolrP837JzHvA6yknyWFxvoxO6
MD5 SHA1 SHA512 SSDEEP

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is-314KT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-14KP1.tmp\is-314KT.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-16T9G.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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gaQKJRKlpp.exe

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

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\gaQKJRKlpp.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/2800-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2800-142-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/2800-144-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/2800-153-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/2800-143-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/2800-155-0x0000000000400000-0x000000000154A000-memory.dmp

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memory/4656-145-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/4656-134-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/4656-132-0x0000000000400000-0x0000000000418000-memory.dmp

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memory/4656-157-0x0000000000400000-0x0000000000418000-memory.dmp

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