nymaim | 5cc4aaa1259957eb27ad62cf1872e3f505ebaa0da76451d2b9e7f40c64454db1

Analysis

max time kernel
91s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
19/12/2022, 00:46

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General

Target
file.exe
Size 2.3MB
Sample221219-a4msgaea34
SHA256 5cc4aaa1259957eb27ad62cf1872e3f505ebaa0da76451d2b9e7f40c64454db1
MD5 0481a477b168e1b9b1ee4970663a3382
SHA1 0eb8eb8073eb7ddd743bbcc7771f494e627c92e3
SHA512 59ef2058a551a361fef05f1b3988d80653684fd32e28e1763a2483e1e8d1de4988ff46c1161f64679cf131a3409a453093719d272c0ed2472640cfd6eaf1418f
SSDEEP 49152:50PBqNFByoap5abVKTHYE6OSlF9DyS5qQ1dizF/0GGHHvHM7O/d3Hs:50PBCByoaGpWBjFV/oPHMQM
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
1608	is-SSBBL.tmp
740	ocFolders.exe
4944	v1csiF7PWfdl.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	ocFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1608	is-SSBBL.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-RD488.tmp	is-SSBBL.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-SSBBL.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ocFolders.exe	is-SSBBL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-S1NHD.tmp	is-SSBBL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PT4IU.tmp	is-SSBBL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RCE2U.tmp	is-SSBBL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TOPS4.tmp	is-SSBBL.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-SSBBL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9S29O.tmp	is-SSBBL.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
740	ocFolders.exe
740	ocFolders.exe
740	ocFolders.exe
740	ocFolders.exe
740	ocFolders.exe
740	ocFolders.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 4160 wrote to memory of 1608	4160	file.exe	81
PID 4160 wrote to memory of 1608	4160	file.exe	81
PID 4160 wrote to memory of 1608	4160	file.exe	81
PID 1608 wrote to memory of 740	1608	is-SSBBL.tmp	82
PID 1608 wrote to memory of 740	1608	is-SSBBL.tmp	82
PID 1608 wrote to memory of 740	1608	is-SSBBL.tmp	82
PID 740 wrote to memory of 4944	740	ocFolders.exe	83
PID 740 wrote to memory of 4944	740	ocFolders.exe	83
PID 740 wrote to memory of 4944	740	ocFolders.exe	83
PID 740 wrote to memory of 4048	740	ocFolders.exe	91
PID 740 wrote to memory of 4048	740	ocFolders.exe	91
PID 740 wrote to memory of 4048	740	ocFolders.exe	91
PID 4048 wrote to memory of 4448	4048	cmd.exe	93
PID 4048 wrote to memory of 4448	4048	cmd.exe	93
PID 4048 wrote to memory of 4448	4048	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4160
- C:\Users\Admin\AppData\Local\Temp\is-R9FOL.tmp\is-SSBBL.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-R9FOL.tmp\is-SSBBL.tmp" /SL4 $701B0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2109290 169984
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1608
- - C:\Program Files (x86)\PrintFolders\ocFolders.exe
    "C:\Program Files (x86)\PrintFolders\ocFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:740
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\v1csiF7PWfdl.exe
      4⤵
      Executes dropped EXE
      PID:4944
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ocFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\ocFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4048
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ocFolders.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

ocFolders.exe

Path C:\Program Files (x86)\PrintFolders\ocFolders.exe
Size 3.6MB
SHA256 72ab814d5ec6d9875b19e05c9293f46d12df85226324f9895b2f42fc1fc56539
MD5 52ef6f7d86d91f48038928dd2db64edd
SHA1 da7323e6ed83a8a6ce665bace4c0e2ecf32cae41
SHA512 f9a2f161e820f9bfe4ed40bd14cf2357e84df0a146d578c62cbc555c83e20e064d3540a6895548954042df508ff185ec7fcd7156bd9018e378508ba53fa834f3
SSDEEP 98304:ifoLyTlj8MffhPBEz6+zl0y4UIIJez4PY/2/:yff1TG
MD5 SHA1 SHA512 SSDEEP

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ocFolders.exe

Path C:\Program Files (x86)\PrintFolders\ocFolders.exe
Size 3.6MB
SHA256 72ab814d5ec6d9875b19e05c9293f46d12df85226324f9895b2f42fc1fc56539
MD5 52ef6f7d86d91f48038928dd2db64edd
SHA1 da7323e6ed83a8a6ce665bace4c0e2ecf32cae41
SHA512 f9a2f161e820f9bfe4ed40bd14cf2357e84df0a146d578c62cbc555c83e20e064d3540a6895548954042df508ff185ec7fcd7156bd9018e378508ba53fa834f3
SSDEEP 98304:ifoLyTlj8MffhPBEz6+zl0y4UIIJez4PY/2/:yff1TG
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-KN8F2.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-SSBBL.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-R9FOL.tmp\is-SSBBL.tmp
Size 759KB
SHA256 2d4703dac05e8e6d136a8173f84d2618b54b6e7ef44ae5557350614bbb5a9797
MD5 d35c838e416f6a317c90117cc834b92b
SHA1 289a030cc78131163a8d6bc3c5dd831ac0f962a1
SHA512 9a50f934c199b4415911cae873cebd46f682526290b41a42a882a580fed67c99f5248abfbaa367f20b471564b4cf6d62f28ed2c945206267b37788f94377f167
SSDEEP 12288:dh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv+PBexOi:D5NoqWolrP837JzHvA6yknyWFxv+PBeH
MD5 SHA1 SHA512 SSDEEP

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is-SSBBL.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-R9FOL.tmp\is-SSBBL.tmp
Size 759KB
SHA256 2d4703dac05e8e6d136a8173f84d2618b54b6e7ef44ae5557350614bbb5a9797
MD5 d35c838e416f6a317c90117cc834b92b
SHA1 289a030cc78131163a8d6bc3c5dd831ac0f962a1
SHA512 9a50f934c199b4415911cae873cebd46f682526290b41a42a882a580fed67c99f5248abfbaa367f20b471564b4cf6d62f28ed2c945206267b37788f94377f167
SSDEEP 12288:dh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv+PBexOi:D5NoqWolrP837JzHvA6yknyWFxv+PBeH
MD5 SHA1 SHA512 SSDEEP

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v1csiF7PWfdl.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\v1csiF7PWfdl.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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v1csiF7PWfdl.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\v1csiF7PWfdl.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/740-143-0x0000000000400000-0x000000000158D000-memory.dmp

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memory/740-142-0x0000000000400000-0x000000000158D000-memory.dmp

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memory/740-155-0x0000000000400000-0x000000000158D000-memory.dmp

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memory/740-144-0x0000000000400000-0x000000000158D000-memory.dmp

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memory/740-152-0x0000000000400000-0x000000000158D000-memory.dmp

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memory/740-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4160-137-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/4160-132-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/4160-156-0x0000000000400000-0x0000000000430000-memory.dmp

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