nymaim | 30cfd51b2e9e6e3ca4a6d676a4cd3ee145353f8a99214c4b5d7a5af90c6de41c

Analysis

max time kernel
61s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
18/12/2022, 16:17

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General

Target
file.exe
Size 2.5MB
Sample221218-trclhscg44
SHA256 30cfd51b2e9e6e3ca4a6d676a4cd3ee145353f8a99214c4b5d7a5af90c6de41c
MD5 07471e456446a53f5907d4015ceb8e46
SHA1 752c1678cfffdce71e6f1b694532b0124149d9e7
SHA512 09dfe3ce3b664ba920afee68e4b4e2d74bfa714b24befe94f811a29a303bf265c35b44fa5bbc9bcec6a50919f245250a801e39dcded12390fbbd33a0497ebd64
SSDEEP 49152:50PBZl4Ju/jZGX1fJCLrACeNS/0DuMhnrzqWzmI7rvZ7O/d3Hh:50PBZaUrocrACeN6CnqWKGRQB
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
1132	is-TJV51.tmp
3632	ocFolders.exe
4852	BLdLHDmWRYYp.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	ocFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1132	is-TJV51.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-TJV51.tmp
File created	C:\Program Files (x86)\PrintFolders\is-U7ALH.tmp	is-TJV51.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HUI6O.tmp	is-TJV51.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-TJV51.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ocFolders.exe	is-TJV51.tmp
File created	C:\Program Files (x86)\PrintFolders\is-O4HFS.tmp	is-TJV51.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HL15P.tmp	is-TJV51.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VC9FH.tmp	is-TJV51.tmp
File created	C:\Program Files (x86)\PrintFolders\is-V7O9S.tmp	is-TJV51.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
1996	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3632	ocFolders.exe
3632	ocFolders.exe
3632	ocFolders.exe
3632	ocFolders.exe
3632	ocFolders.exe
3632	ocFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1996	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1132	1972	file.exe	79
PID 1972 wrote to memory of 1132	1972	file.exe	79
PID 1972 wrote to memory of 1132	1972	file.exe	79
PID 1132 wrote to memory of 3632	1132	is-TJV51.tmp	80
PID 1132 wrote to memory of 3632	1132	is-TJV51.tmp	80
PID 1132 wrote to memory of 3632	1132	is-TJV51.tmp	80
PID 3632 wrote to memory of 4852	3632	ocFolders.exe	84
PID 3632 wrote to memory of 4852	3632	ocFolders.exe	84
PID 3632 wrote to memory of 4852	3632	ocFolders.exe	84
PID 3632 wrote to memory of 4596	3632	ocFolders.exe	91
PID 3632 wrote to memory of 4596	3632	ocFolders.exe	91
PID 3632 wrote to memory of 4596	3632	ocFolders.exe	91
PID 4596 wrote to memory of 1996	4596	cmd.exe	93
PID 4596 wrote to memory of 1996	4596	cmd.exe	93
PID 4596 wrote to memory of 1996	4596	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:1972
- C:\Users\Admin\AppData\Local\Temp\is-D1R6A.tmp\is-TJV51.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-D1R6A.tmp\is-TJV51.tmp" /SL4 $D0182 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2324286 169984
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1132
- - 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:3632
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\BLdLHDmWRYYp.exe
      4⤵
      Executes dropped EXE
      PID:4852
  - - 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:4596
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ocFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1996

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 3.7MB
SHA256 66541367007a26743f2a42bef2a9f1f1ea4bb47b3fee034903cb1995618246fc
MD5 dae7991119a800cd343296480b48987c
SHA1 608e30ceb1833a6c6e9268557621411b55a33e58
SHA512 ab9a622de485826d7a6d43f47d159770b986163b00de6ba3f30db9f573e14a69809d7dd0acfcbc552556b38cc93b534c1c7dce47f2f8e470334831c348eb95d4
SSDEEP 98304:qJ5iFWJ19mBffhPBPQBN+zLQooNkkD6sHAGoUB+SC/3:dff1vF/3
MD5 SHA1 SHA512 SSDEEP

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ocFolders.exe

Path C:\Program Files (x86)\PrintFolders\ocFolders.exe
Size 3.7MB
SHA256 66541367007a26743f2a42bef2a9f1f1ea4bb47b3fee034903cb1995618246fc
MD5 dae7991119a800cd343296480b48987c
SHA1 608e30ceb1833a6c6e9268557621411b55a33e58
SHA512 ab9a622de485826d7a6d43f47d159770b986163b00de6ba3f30db9f573e14a69809d7dd0acfcbc552556b38cc93b534c1c7dce47f2f8e470334831c348eb95d4
SSDEEP 98304:qJ5iFWJ19mBffhPBPQBN+zLQooNkkD6sHAGoUB+SC/3:dff1vF/3
MD5 SHA1 SHA512 SSDEEP

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is-TJV51.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-D1R6A.tmp\is-TJV51.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-TJV51.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-D1R6A.tmp\is-TJV51.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-IAK7O.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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BLdLHDmWRYYp.exe

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

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\BLdLHDmWRYYp.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/1972-151-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/1972-134-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/1972-132-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/1972-156-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/3632-142-0x0000000000400000-0x00000000015BF000-memory.dmp

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memory/3632-143-0x0000000000400000-0x00000000015BF000-memory.dmp

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memory/3632-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3632-152-0x0000000000400000-0x00000000015BF000-memory.dmp

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memory/3632-155-0x0000000000400000-0x00000000015BF000-memory.dmp

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