nymaim | 2cff9e46fef32599208ea95da6d2abbb7bc32bc817f191e012b363dcf817fd09

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
18/12/2022, 09:48

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General

Target
file.exe
Size 2.3MB
Sample221218-lsrstsec6t
SHA256 2cff9e46fef32599208ea95da6d2abbb7bc32bc817f191e012b363dcf817fd09
MD5 6d1c4acf99518b4c40849ca310319014
SHA1 8efa05bfab73b1dc10b36a3ddd0c994b7cbb4bad
SHA512 57c0cdb4c8cf0e9bbb5c86b7104e3c94d456e19196ff05ca022bc81cef7030b6d560198158b3dfa71082579960a3f068fe538b086b5dd74f8326299d2069411b
SSDEEP 49152:F0PB/4nHnwLu8Gs/M1LG2n+STdn6tTmOYQvsFTdoeO18sql7O/d3HG:F0PBOHwh01LTnbn6tTlIt5lQm
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
1648	is-LP6FO.tmp
1684	ocFolders.exe
3192	gPk6uYe9gK.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	ocFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1648	is-LP6FO.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-B0ODJ.tmp	is-LP6FO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-LP6FO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GL6F0.tmp	is-LP6FO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GNU90.tmp	is-LP6FO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3RHB7.tmp	is-LP6FO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GUHRB.tmp	is-LP6FO.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-LP6FO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-134NH.tmp	is-LP6FO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ocFolders.exe	is-LP6FO.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
4480	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1684	ocFolders.exe
1684	ocFolders.exe
1684	ocFolders.exe
1684	ocFolders.exe
1684	ocFolders.exe
1684	ocFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4480	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4864 wrote to memory of 1648	4864	file.exe	80
PID 4864 wrote to memory of 1648	4864	file.exe	80
PID 4864 wrote to memory of 1648	4864	file.exe	80
PID 1648 wrote to memory of 1684	1648	is-LP6FO.tmp	81
PID 1648 wrote to memory of 1684	1648	is-LP6FO.tmp	81
PID 1648 wrote to memory of 1684	1648	is-LP6FO.tmp	81
PID 1684 wrote to memory of 3192	1684	ocFolders.exe	82
PID 1684 wrote to memory of 3192	1684	ocFolders.exe	82
PID 1684 wrote to memory of 3192	1684	ocFolders.exe	82
PID 1684 wrote to memory of 3576	1684	ocFolders.exe	90
PID 1684 wrote to memory of 3576	1684	ocFolders.exe	90
PID 1684 wrote to memory of 3576	1684	ocFolders.exe	90
PID 3576 wrote to memory of 4480	3576	cmd.exe	92
PID 3576 wrote to memory of 4480	3576	cmd.exe	92
PID 3576 wrote to memory of 4480	3576	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4864
- C:\Users\Admin\AppData\Local\Temp\is-E4UQ8.tmp\is-LP6FO.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-E4UQ8.tmp\is-LP6FO.tmp" /SL4 $A0066 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2175383 169984
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1648
- - 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:1684
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\gPk6uYe9gK.exe
      4⤵
      Executes dropped EXE
      PID:3192
  - - 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:3576
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ocFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4480

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 3.5MB
SHA256 41430eafd7ff15298025db97da63eabb80b0bacd5490fdcc92d58560f445b8b8
MD5 0817bffc1d6e4ac61333e7262c4543d6
SHA1 dcae9b219c0f3831b8dd8262cd2c16db86144490
SHA512 cce3016db6531cf45853dcaeec08c57d63250f37b283bfd17efe6536a462d03c057369ef2042d92f51cddbdd1a0297f1c7c290347657a729e32e242f01741f01
SSDEEP 98304:V/kgYbJdgffuPBJ3V4KWNMp6nWtZ6xTxeW:9ff+hfW
MD5 SHA1 SHA512 SSDEEP

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ocFolders.exe

Path C:\Program Files (x86)\PrintFolders\ocFolders.exe
Size 3.5MB
SHA256 41430eafd7ff15298025db97da63eabb80b0bacd5490fdcc92d58560f445b8b8
MD5 0817bffc1d6e4ac61333e7262c4543d6
SHA1 dcae9b219c0f3831b8dd8262cd2c16db86144490
SHA512 cce3016db6531cf45853dcaeec08c57d63250f37b283bfd17efe6536a462d03c057369ef2042d92f51cddbdd1a0297f1c7c290347657a729e32e242f01741f01
SSDEEP 98304:V/kgYbJdgffuPBJ3V4KWNMp6nWtZ6xTxeW:9ff+hfW
MD5 SHA1 SHA512 SSDEEP

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is-LP6FO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-E4UQ8.tmp\is-LP6FO.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-LP6FO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-E4UQ8.tmp\is-LP6FO.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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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-L17K2.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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gPk6uYe9gK.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\gPk6uYe9gK.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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gPk6uYe9gK.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\gPk6uYe9gK.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/1684-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1684-143-0x0000000000400000-0x000000000158B000-memory.dmp

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memory/1684-142-0x0000000000400000-0x000000000158B000-memory.dmp

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memory/1684-144-0x0000000000400000-0x000000000158B000-memory.dmp

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memory/1684-152-0x0000000000400000-0x000000000158B000-memory.dmp

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memory/1684-155-0x0000000000400000-0x000000000158B000-memory.dmp

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memory/4864-138-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/4864-132-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/4864-156-0x0000000000400000-0x0000000000430000-memory.dmp

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