nymaim | ab0f6a0491113faf569d4d9d1f7ab21c7a7e1dbed2e0ccf81f7ced5f1fb656b6

Analysis

max time kernel
166s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
01/12/2022, 08:47

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General

Target
file.exe
Size 2.1MB
Sample221201-kpxdgafd7s
SHA256 ab0f6a0491113faf569d4d9d1f7ab21c7a7e1dbed2e0ccf81f7ced5f1fb656b6
MD5 da471a27655db514f3579d029ef37e89
SHA1 3432dbc2c0553e05be30f3fd8e8ed6e174e0d7d8
SHA512 f31433c768db41ed5a36e8e2a58106d45608e1d90928e884cfb6765371f3ec8d4b15c14388463d4bf4c99f2ba3afde6c38a714e2e5c83cc28e4e295635c8d13b
SSDEEP 49152:ITc5ltv3EQGi9WKvVwbs/caafsSx+A74Sk5iAG5cyz:IYvHTmA/cxfsS574HiXcyz
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
1636	is-G1VRO.tmp
3568	PrintFolders.exe
3996	EFJpDPj.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1636	is-G1VRO.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 opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-G1VRO.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-G1VRO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4TDN7.tmp	is-G1VRO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-ESQRI.tmp	is-G1VRO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KSTM3.tmp	is-G1VRO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NC54S.tmp	is-G1VRO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GO9NH.tmp	is-G1VRO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-17U2J.tmp	is-G1VRO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-G1VRO.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
3240	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3568	PrintFolders.exe
3568	PrintFolders.exe
3568	PrintFolders.exe
3568	PrintFolders.exe
3568	PrintFolders.exe
3568	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3568	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3240	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3488 wrote to memory of 1636	3488	file.exe	81
PID 3488 wrote to memory of 1636	3488	file.exe	81
PID 3488 wrote to memory of 1636	3488	file.exe	81
PID 1636 wrote to memory of 3568	1636	is-G1VRO.tmp	84
PID 1636 wrote to memory of 3568	1636	is-G1VRO.tmp	84
PID 1636 wrote to memory of 3568	1636	is-G1VRO.tmp	84
PID 3568 wrote to memory of 3996	3568	PrintFolders.exe	87
PID 3568 wrote to memory of 3996	3568	PrintFolders.exe	87
PID 3568 wrote to memory of 3996	3568	PrintFolders.exe	87
PID 3568 wrote to memory of 2812	3568	PrintFolders.exe	99
PID 3568 wrote to memory of 2812	3568	PrintFolders.exe	99
PID 3568 wrote to memory of 2812	3568	PrintFolders.exe	99
PID 2812 wrote to memory of 3240	2812	cmd.exe	101
PID 2812 wrote to memory of 3240	2812	cmd.exe	101
PID 2812 wrote to memory of 3240	2812	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3488
- C:\Users\Admin\AppData\Local\Temp\is-52NFV.tmp\is-G1VRO.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-52NFV.tmp\is-G1VRO.tmp" /SL4 $9003A "C:\Users\Admin\AppData\Local\Temp\file.exe" 1923047 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1636
- - 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:3568
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\EFJpDPj.exe
      4⤵
      Executes dropped EXE
      PID:3996
  - - 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:2812
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3240

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 dfc5183c6946297614d9ec50505f6869c5d0bbf734e8bf6c7095e41257212c71
MD5 e12a9b616ec6ad16c564933da7d30872
SHA1 aceb6dc282e93696e3dbdf56fcb473955e8ef506
SHA512 a460c444f0652bb5079a90afc944bd9a5e6ba56651c24fa949dab876a7edaf2c2490513ae63b3e74c062fea381f86e310faa31d1f5b38cd8715b5154fc0d2067
SSDEEP 49152:cbhl5LEVbG7IetF3piHUb4FQ4leM0RKRC6Mp+qrF:cbr5gVbGztF3pi0b4JYMEKRC6MkqrF
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 dfc5183c6946297614d9ec50505f6869c5d0bbf734e8bf6c7095e41257212c71
MD5 e12a9b616ec6ad16c564933da7d30872
SHA1 aceb6dc282e93696e3dbdf56fcb473955e8ef506
SHA512 a460c444f0652bb5079a90afc944bd9a5e6ba56651c24fa949dab876a7edaf2c2490513ae63b3e74c062fea381f86e310faa31d1f5b38cd8715b5154fc0d2067
SSDEEP 49152:cbhl5LEVbG7IetF3piHUb4FQ4leM0RKRC6Mp+qrF:cbr5gVbGztF3pi0b4JYMEKRC6MkqrF
MD5 SHA1 SHA512 SSDEEP

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is-G1VRO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-52NFV.tmp\is-G1VRO.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-G1VRO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-52NFV.tmp\is-G1VRO.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-UQHMJ.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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EFJpDPj.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\EFJpDPj.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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EFJpDPj.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\EFJpDPj.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/3488-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3488-155-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3488-134-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3568-143-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/3568-148-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/3568-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3568-144-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/3568-154-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/3568-142-0x0000000000400000-0x0000000001535000-memory.dmp

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