nymaim | b9d5c639e8220325164d2e46678fcf4c4c19f3dfcc13594d247a20c340b10a13

Analysis

max time kernel
186s
max time network
203s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
02/12/2022, 14:47

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General

Target
file.exe
Size 2.1MB
Sample221202-r5w6zagd33
SHA256 b9d5c639e8220325164d2e46678fcf4c4c19f3dfcc13594d247a20c340b10a13
MD5 9c79225b1047c7f6d3149a448bb287de
SHA1 933d1c5506d2a18ebf6760ffb3b72dc02d6c8c2a
SHA512 e3133c3680ecacc2d71656809201abe65351adc10d40b523c741ab08d562e9cebc50603c562585b12ab38517c091a272935fd6d7a05bf4ae3723fa58308afc23
SSDEEP 49152:knu5LEdBWWzc8SW7luVRtbmbEB0CtDAOXc71of71SdAG5cyn:keEdBW/wluntb8ECyDrXc7isXcyn
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
1904	is-MSIV9.tmp
3428	PrintFolders.exe
3676	YQ9rG1tDS.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
1904	is-MSIV9.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-MSIV9.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-MSIV9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GGCS2.tmp	is-MSIV9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RFU42.tmp	is-MSIV9.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-MSIV9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QHS6L.tmp	is-MSIV9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4MHTT.tmp	is-MSIV9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5NEDG.tmp	is-MSIV9.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HEK3N.tmp	is-MSIV9.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
4448	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3428	PrintFolders.exe
3428	PrintFolders.exe
3428	PrintFolders.exe
3428	PrintFolders.exe
3428	PrintFolders.exe
3428	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3428	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4448	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 1904	2324	file.exe	79
PID 2324 wrote to memory of 1904	2324	file.exe	79
PID 2324 wrote to memory of 1904	2324	file.exe	79
PID 1904 wrote to memory of 3428	1904	is-MSIV9.tmp	80
PID 1904 wrote to memory of 3428	1904	is-MSIV9.tmp	80
PID 1904 wrote to memory of 3428	1904	is-MSIV9.tmp	80
PID 3428 wrote to memory of 3676	3428	PrintFolders.exe	81
PID 3428 wrote to memory of 3676	3428	PrintFolders.exe	81
PID 3428 wrote to memory of 3676	3428	PrintFolders.exe	81
PID 3428 wrote to memory of 2628	3428	PrintFolders.exe	82
PID 3428 wrote to memory of 2628	3428	PrintFolders.exe	82
PID 3428 wrote to memory of 2628	3428	PrintFolders.exe	82
PID 2628 wrote to memory of 4448	2628	cmd.exe	84
PID 2628 wrote to memory of 4448	2628	cmd.exe	84
PID 2628 wrote to memory of 4448	2628	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2324
- C:\Users\Admin\AppData\Local\Temp\is-DVUE7.tmp\is-MSIV9.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-DVUE7.tmp\is-MSIV9.tmp" /SL4 $E01CE "C:\Users\Admin\AppData\Local\Temp\file.exe" 1983248 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1904
- - 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:3428
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\YQ9rG1tDS.exe
      4⤵
      Executes dropped EXE
      PID:3676
  - - 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:2628
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4448

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 3.3MB
SHA256 d7625a1146001493057cc94d9b129fb6558bfc65a2438782930d8f960c4f1cca
MD5 6bd94d97a3c06fde811530c86ab1d56c
SHA1 77e6238bf93c4ec29c3ed84321b279976d45f60d
SHA512 e32c49a3b2ca84dea8fc9586590066861f3bc7eec45d7b616ec1e07a94969cc6865d8147f226ed5c0409e0a4943eab9d843cf38212c909da9f967f14a753d797
SSDEEP 24576:v6oMgLKEkuEwZ8QXvtWEAbyybhGIeJxiZf2w9q3kmQIPBwOuyXIODLfgKSNucOJG:v1DLYWWEAVFGIuxiZel6OuONLdsoG
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 d7625a1146001493057cc94d9b129fb6558bfc65a2438782930d8f960c4f1cca
MD5 6bd94d97a3c06fde811530c86ab1d56c
SHA1 77e6238bf93c4ec29c3ed84321b279976d45f60d
SHA512 e32c49a3b2ca84dea8fc9586590066861f3bc7eec45d7b616ec1e07a94969cc6865d8147f226ed5c0409e0a4943eab9d843cf38212c909da9f967f14a753d797
SSDEEP 24576:v6oMgLKEkuEwZ8QXvtWEAbyybhGIeJxiZf2w9q3kmQIPBwOuyXIODLfgKSNucOJG:v1DLYWWEAVFGIuxiZel6OuONLdsoG
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-4UBC1.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-MSIV9.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-DVUE7.tmp\is-MSIV9.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-MSIV9.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-DVUE7.tmp\is-MSIV9.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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YQ9rG1tDS.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\YQ9rG1tDS.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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YQ9rG1tDS.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\YQ9rG1tDS.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/2324-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2324-156-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2324-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3428-142-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/3428-144-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/3428-148-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/3428-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3428-143-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/3428-155-0x0000000000400000-0x0000000001552000-memory.dmp

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