nymaim | da4da214dc68293141c6cb9e3dc5289dc9dd19854fe9a2aaa18dee9704eaf48d

Analysis

max time kernel
175s
max time network
186s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
26/11/2022, 05:46

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General

Target
file.exe
Size 2.2MB
Sample221126-ggamysfb74
SHA256 da4da214dc68293141c6cb9e3dc5289dc9dd19854fe9a2aaa18dee9704eaf48d
MD5 51f39b443482e7986befaffe2694d77d
SHA1 7af3a25839599f226817ad65de3203765735429c
SHA512 2e783d9d2c85694b2a5dd091dc9c790eebb3771184fbe1a193f1021806f46f1b3cc73872790ea7c944c53115320c8f5637b779520fd3aa4e1c76f0df29a09193
SSDEEP 49152:wujlw2gQ3mHbBUFvR/qYFiMD0OhZKGK/GTuWBmUOPxEpiAnAG5cyn:wElw2tIFo5RZVxuZUOapnnXcyn
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
2204	is-I626P.tmp
4284	PrintFolders.exe
3172	IpuWjz.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2204	is-I626P.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-I626P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9BQD8.tmp	is-I626P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-12CVS.tmp	is-I626P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I4B9P.tmp	is-I626P.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-I626P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-48OTV.tmp	is-I626P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-469SC.tmp	is-I626P.tmp
File created	C:\Program Files (x86)\PrintFolders\is-60272.tmp	is-I626P.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-I626P.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
4680	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4284	PrintFolders.exe
4284	PrintFolders.exe
4284	PrintFolders.exe
4284	PrintFolders.exe
4284	PrintFolders.exe
4284	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4284	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4680	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4848 wrote to memory of 2204	4848	file.exe	79
PID 4848 wrote to memory of 2204	4848	file.exe	79
PID 4848 wrote to memory of 2204	4848	file.exe	79
PID 2204 wrote to memory of 4284	2204	is-I626P.tmp	80
PID 2204 wrote to memory of 4284	2204	is-I626P.tmp	80
PID 2204 wrote to memory of 4284	2204	is-I626P.tmp	80
PID 4284 wrote to memory of 3172	4284	PrintFolders.exe	81
PID 4284 wrote to memory of 3172	4284	PrintFolders.exe	81
PID 4284 wrote to memory of 3172	4284	PrintFolders.exe	81
PID 4284 wrote to memory of 3572	4284	PrintFolders.exe	84
PID 4284 wrote to memory of 3572	4284	PrintFolders.exe	84
PID 4284 wrote to memory of 3572	4284	PrintFolders.exe	84
PID 3572 wrote to memory of 4680	3572	cmd.exe	86
PID 3572 wrote to memory of 4680	3572	cmd.exe	86
PID 3572 wrote to memory of 4680	3572	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4848
- C:\Users\Admin\AppData\Local\Temp\is-QJ25C.tmp\is-I626P.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-QJ25C.tmp\is-I626P.tmp" /SL4 $90060 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2033834 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2204
- - 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:4284
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\IpuWjz.exe
      4⤵
      Executes dropped EXE
      PID:3172
  - - 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:3572
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4680

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 3.5MB
SHA256 aa03c63184df7d73fedd0dd5e37eae6d117d6ae5b3e9cf8a1072fde564183319
MD5 3dd5df9e93712599301e16d4d699ccad
SHA1 93be179446d0045f7ba73dace6bf26b461ce98bd
SHA512 8592c31b17ec5d1a1a7f78f4b85fb7555fabbe6e3b0597e378dccf8b98e7b8d753a827dafeb46281be4d8bffa37e4e0cceaf5f17142f38cb79aede2a91c9e213
SSDEEP 49152:R4y8Ab2NBmhm30a4umFBU+e5mUHvABnZBgb45KvDfZt8:QAb2NBsQ0a7mFBU+egUHvAvvefE
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.5MB
SHA256 aa03c63184df7d73fedd0dd5e37eae6d117d6ae5b3e9cf8a1072fde564183319
MD5 3dd5df9e93712599301e16d4d699ccad
SHA1 93be179446d0045f7ba73dace6bf26b461ce98bd
SHA512 8592c31b17ec5d1a1a7f78f4b85fb7555fabbe6e3b0597e378dccf8b98e7b8d753a827dafeb46281be4d8bffa37e4e0cceaf5f17142f38cb79aede2a91c9e213
SSDEEP 49152:R4y8Ab2NBmhm30a4umFBU+e5mUHvABnZBgb45KvDfZt8:QAb2NBsQ0a7mFBU+egUHvAvvefE
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-HD6R5.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-I626P.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-QJ25C.tmp\is-I626P.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-I626P.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-QJ25C.tmp\is-I626P.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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IpuWjz.exe

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

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\IpuWjz.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/4284-143-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/4284-144-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/4284-142-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/4284-148-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/4284-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4284-155-0x0000000000400000-0x000000000157B000-memory.dmp

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memory/4848-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4848-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4848-156-0x0000000000400000-0x0000000000413000-memory.dmp

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