nymaim | ecce0e7370b266c31e0a774add9e3aa6487453d803870fb7dea4f007b4f3b002

Analysis

max time kernel
90s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
24/11/2022, 22:49

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General

Target
file.exe
Size 1.3MB
Sample221124-2ry4hshb81
SHA256 ecce0e7370b266c31e0a774add9e3aa6487453d803870fb7dea4f007b4f3b002
MD5 7f5998ca7bde7cf5fc81d5808325e6ab
SHA1 61a476989811e51e764f92dba5190c2fcde304aa
SHA512 3a32cf4dc44da180f84a23959d3bf38619c59a8b65c30dc8e6eb1dc82b8565079d3b47854122949d4a6f4f0a9aaecf402401f0d1f363963a3ca998b9fdbc1c0a
SSDEEP 24576:xizEjU7QU3PTJt0+scAuTBa4wxK1qxJs7piAp84BUuZCsZczRciDf01gZIY7eCL9:aaKsu1Gx/cpdjZBZcz+iDf0SNeVi7
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
3532	is-HCP5H.tmp
1584	PrintFolders.exe
1944	IxmDHzrc.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3532	is-HCP5H.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-HCP5H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KGTU8.tmp	is-HCP5H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NKLJF.tmp	is-HCP5H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-CBNMN.tmp	is-HCP5H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6M55B.tmp	is-HCP5H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-D3V5K.tmp	is-HCP5H.tmp
File created	C:\Program Files (x86)\PrintFolders\is-T8QRB.tmp	is-HCP5H.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HCP5H.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-HCP5H.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
1940	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1584	PrintFolders.exe
1584	PrintFolders.exe
1584	PrintFolders.exe
1584	PrintFolders.exe
1584	PrintFolders.exe
1584	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1940	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4964 wrote to memory of 3532	4964	file.exe	81
PID 4964 wrote to memory of 3532	4964	file.exe	81
PID 4964 wrote to memory of 3532	4964	file.exe	81
PID 3532 wrote to memory of 1584	3532	is-HCP5H.tmp	82
PID 3532 wrote to memory of 1584	3532	is-HCP5H.tmp	82
PID 3532 wrote to memory of 1584	3532	is-HCP5H.tmp	82
PID 1584 wrote to memory of 1944	1584	PrintFolders.exe	83
PID 1584 wrote to memory of 1944	1584	PrintFolders.exe	83
PID 1584 wrote to memory of 1944	1584	PrintFolders.exe	83
PID 1584 wrote to memory of 3380	1584	PrintFolders.exe	91
PID 1584 wrote to memory of 3380	1584	PrintFolders.exe	91
PID 1584 wrote to memory of 3380	1584	PrintFolders.exe	91
PID 3380 wrote to memory of 1940	3380	cmd.exe	93
PID 3380 wrote to memory of 1940	3380	cmd.exe	93
PID 3380 wrote to memory of 1940	3380	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:4964
- C:\Users\Admin\AppData\Local\Temp\is-99DLK.tmp\is-HCP5H.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-99DLK.tmp\is-HCP5H.tmp" /SL4 $C003A "C:\Users\Admin\AppData\Local\Temp\file.exe" 1095886 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3532
- - 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 use of WriteProcessMemory
    PID:1584
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\IxmDHzrc.exe
      4⤵
      Executes dropped EXE
      PID:1944
  - - 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:3380
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1940

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 1.7MB
SHA256 bd4bca37b2baa03c076fde3ae5fdc8c91b5203a09757e40ed2e4c8a01d9fe38c
MD5 26e2777f537236127c9d73e30f49c3f1
SHA1 c23034dc73b3090108f28e95c17b440de2f5b0a7
SHA512 39e0728353e294e46405028aa247ddeb00be56cd2af8acd67134cb90674716f36f0630e9e804f32728171a0ddcd6f6612cda3fc9a8db54d808a346a12fe6bc84
SSDEEP 24576:m+5+q0+d4+j+sk+aM+Hy+wtim7YBBPRCk+O/v9nfDHmPTiZphP3lkyU/I62y4:fYqNdR6OaVHbwtiCIpCGBKPT4Hb+4
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 bd4bca37b2baa03c076fde3ae5fdc8c91b5203a09757e40ed2e4c8a01d9fe38c
MD5 26e2777f537236127c9d73e30f49c3f1
SHA1 c23034dc73b3090108f28e95c17b440de2f5b0a7
SHA512 39e0728353e294e46405028aa247ddeb00be56cd2af8acd67134cb90674716f36f0630e9e804f32728171a0ddcd6f6612cda3fc9a8db54d808a346a12fe6bc84
SSDEEP 24576:m+5+q0+d4+j+sk+aM+Hy+wtim7YBBPRCk+O/v9nfDHmPTiZphP3lkyU/I62y4:fYqNdR6OaVHbwtiCIpCGBKPT4Hb+4
MD5 SHA1 SHA512 SSDEEP

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is-HCP5H.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-99DLK.tmp\is-HCP5H.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-HCP5H.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-99DLK.tmp\is-HCP5H.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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IxmDHzrc.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\IxmDHzrc.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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IxmDHzrc.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\IxmDHzrc.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/1584-154-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/1584-145-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/1584-146-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/1584-150-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1584-157-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/4964-141-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4964-135-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4964-158-0x0000000000400000-0x0000000000413000-memory.dmp

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