nymaim | 9ed011c352533fee1805bf52d83cb22cbd2aeaf5c05c8181a37af2fecd5f1389

Analysis

max time kernel
90s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
01/12/2022, 13:32

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General

Target
file.exe
Size 2.1MB
Sample221201-qszkwsce22
SHA256 9ed011c352533fee1805bf52d83cb22cbd2aeaf5c05c8181a37af2fecd5f1389
MD5 167e4bcc85d3e4555385f9411f971404
SHA1 dd59dfc37682472410f7331a511652d386646c14
SHA512 7591a4e63b87a2b77c4d7f788e66e0a7060e2e9ac9e930e835552cc816f669e3f80547f6a07a05804514d351d8f23d05ebbb95800f4e42554e14d7731ea2f10e
SSDEEP 49152:spk/43jF44iGZO+c11nOs1lUeNAcYLBXnYWLuFe8Dnkm17xAG5cyW:si/4R44iGM+cjnt1lAcuBXnYWUDbXcyW
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
4156	is-7C9AV.tmp
1120	PrintFolders.exe
4692	bvOWby.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4156	is-7C9AV.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-89RPQ.tmp	is-7C9AV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DQOTF.tmp	is-7C9AV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-G2CCF.tmp	is-7C9AV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-E2D5O.tmp	is-7C9AV.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7C9AV.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-7C9AV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-E1MA3.tmp	is-7C9AV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-P7I8F.tmp	is-7C9AV.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-7C9AV.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
3716	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1120	PrintFolders.exe
1120	PrintFolders.exe
1120	PrintFolders.exe
1120	PrintFolders.exe
1120	PrintFolders.exe
1120	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3716	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 4156	2340	file.exe	83
PID 2340 wrote to memory of 4156	2340	file.exe	83
PID 2340 wrote to memory of 4156	2340	file.exe	83
PID 4156 wrote to memory of 1120	4156	is-7C9AV.tmp	84
PID 4156 wrote to memory of 1120	4156	is-7C9AV.tmp	84
PID 4156 wrote to memory of 1120	4156	is-7C9AV.tmp	84
PID 1120 wrote to memory of 4692	1120	PrintFolders.exe	85
PID 1120 wrote to memory of 4692	1120	PrintFolders.exe	85
PID 1120 wrote to memory of 4692	1120	PrintFolders.exe	85
PID 1120 wrote to memory of 828	1120	PrintFolders.exe	94
PID 1120 wrote to memory of 828	1120	PrintFolders.exe	94
PID 1120 wrote to memory of 828	1120	PrintFolders.exe	94
PID 828 wrote to memory of 3716	828	cmd.exe	96
PID 828 wrote to memory of 3716	828	cmd.exe	96
PID 828 wrote to memory of 3716	828	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2340
- C:\Users\Admin\AppData\Local\Temp\is-03DGR.tmp\is-7C9AV.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-03DGR.tmp\is-7C9AV.tmp" /SL4 $501C4 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1918817 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4156
- - 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 use of WriteProcessMemory
    PID:1120
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\bvOWby.exe
      4⤵
      Executes dropped EXE
      PID:4692
  - - 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:828
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3716

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 3.2MB
SHA256 c9e679bbe765c36af268822c2978c50ff4b6cddc2fcd22838e235405f4998847
MD5 443d039cb0efb3b4f515a3e56b640256
SHA1 fc4ef8b8fb2930e1702e08829a16632dbd1b9895
SHA512 12a0ec3fad1c655317b8d14d26100fe936ac26d8755eaa21089d5c8c0393de287abb28cf508dd7dabf42a54f6c76c890facb8f8528ee72187aadb13dba3c5aa9
SSDEEP 24576:59ht7fzhnLCQS5O4bVPptp4ZPM2Sk2f5Z3jMOuX35rGKY9XljhltZVxU5ctOYSm3:5t7fz5LTm/tp4ZPV72h2F5jYftZvsm3
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 c9e679bbe765c36af268822c2978c50ff4b6cddc2fcd22838e235405f4998847
MD5 443d039cb0efb3b4f515a3e56b640256
SHA1 fc4ef8b8fb2930e1702e08829a16632dbd1b9895
SHA512 12a0ec3fad1c655317b8d14d26100fe936ac26d8755eaa21089d5c8c0393de287abb28cf508dd7dabf42a54f6c76c890facb8f8528ee72187aadb13dba3c5aa9
SSDEEP 24576:59ht7fzhnLCQS5O4bVPptp4ZPM2Sk2f5Z3jMOuX35rGKY9XljhltZVxU5ctOYSm3:5t7fz5LTm/tp4ZPV72h2F5jYftZvsm3
MD5 SHA1 SHA512 SSDEEP

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is-7C9AV.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-03DGR.tmp\is-7C9AV.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-7C9AV.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-03DGR.tmp\is-7C9AV.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-3GTQ4.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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bvOWby.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\bvOWby.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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bvOWby.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\bvOWby.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/1120-143-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/1120-142-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/1120-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1120-152-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/1120-155-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/2340-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2340-151-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2340-134-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2340-156-0x0000000000400000-0x0000000000413000-memory.dmp

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